Servo motor stator punching sheet

Abstract

The utility model provides a servo motor stator punching sheet, and belongs to the technical field of motors. The problem that an existing stator core is high in cost is solved. The servo motor stator punching sheet comprises an annular yoke punching sheet and an annular tooth punching sheet, the tooth punching sheet comprises a circle of tooth bodies, every two adjacent tooth bodies are connected through an arc strip, the outer side wall of each tooth body is fixedly connected with the inner side wall of the yoke punching sheet in a close contact mode, an outer arc notch axially penetrates through the outer side wall of each tooth body, and the outer arc notch is fixedly connected with the inner side wall of the yoke punching sheet. Inner arc notches matched with the outer arc notches are axially formed in the inner side wall of the yoke punching sheet in a penetrating mode, the outer arc notches and the inner arc notches are the same in number and are in one-to-one correspondence in position, and round rivet holes are formed between the inner arc notches and the outer arc notches corresponding in position. The servo motor stator punching sheet is low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors and relates to a servo motor, in particular to a stator punching sheet of a servo motor. Background Art

[0002] The stator laminations are an important component of the servo motor stator, and in order to effectively reduce the heating phenomenon caused by eddy currents, the stator laminations are generally made as thin as possible.

[0003] Existing motor stators, such as the stator assembly and servo motor disclosed in the Chinese Patent Library (application number: 202310715201.9), include: a stator core, the stator core includes a yoke core and a tooth core of a split structure; the tooth core is connected to the yoke core, the tooth core includes a plurality of first punching sheets, and the plurality of first punching sheets are arranged axially; each of the plurality of first punching sheets includes a plurality of first teeth, the plurality of first teeth are arranged along the circumference of the yoke core, and adjacent first teeth of the plurality of first teeth and the yoke core form a closed first wire slot; a plurality of first coils, the plurality of first coils are wound around the stator core; a plurality of second coils, the plurality of second coils are wound around the stator core, and are arranged alternately with the plurality of first coils; the plurality of second coils are corner-connected, and the plurality of first coils are star-connected to the plurality of second coils.

[0004] In the above-mentioned stator assembly, the yoke core and the tooth core are both made of a plurality of stacked punching sheets and riveted by rivets. Two circles of rivets are required as a whole, and numerous riveting operations are involved, which greatly increases the manufacturing cost. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a servo motor stator punching sheet which can reduce the cost of the stator core.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a servo motor stator punching sheet, including a yoke punching sheet and a tooth punching sheet, both of which are in the shape of an annulus, the tooth punching sheet includes a circle of tooth bodies, and two adjacent tooth bodies are connected by arc bars, the outer side wall of each tooth body is tightly contacted and fixedly connected with the inner side wall of the yoke punching sheet, and is characterized in that an outer arc notch is axially penetrated on the outer side wall of each tooth body, and an inner arc notch matching the outer arc notch is axially penetrated on the inner side wall of the yoke punching sheet, the outer arc notch and the inner arc notch are the same in number and their positions correspond one to one, and a circular rivet hole is formed between the inner arc notch and the outer arc notch that correspond in position.

[0007] In actual products, multiple yoke punchings are stacked up and down to form a yoke core, and multiple tooth punchings are stacked up and down to form a tooth core; during actual assembly, the tooth punchings are pressed into the yoke punchings through a specific mold, and the yoke core and the tooth core are shaped at the same time through the rivet holes and rivets to stabilize the stator core.

[0008] By providing rivet holes between the tooth body and the yoke punching sheets, the rivet holes cooperate with the rivets to simultaneously shape the yoke core composed of multiple yoke punching sheets and the tooth core composed of multiple tooth punching sheets during actual assembly. This not only greatly reduces the rivet investment, but also reduces the riveting process, thereby reducing the manufacturing cost of the entire stator core.

[0009] In the above-mentioned servo motor stator punching sheet, the cross-sections of the inner arc notch and the outer arc notch are both semicircular, so that the axial force generated after the rivet is riveted can be evenly distributed to the yoke punching sheet and the tooth punching sheet, ensuring the overall structural stability of the stator core.

[0010] In the above-mentioned servo motor stator punching sheet, a circle of guide grooves is axially penetrated on the outer surface of the yoke punching sheet. The guide grooves are used for installation guidance and position limiting of the stator punching sheet during assembly, so as to facilitate the assembly of the stator core.

[0011] In the above-mentioned servo motor stator punching sheet, the cross section of the guide groove is in the shape of a circular arc to ensure the strength of the yoke punching sheet.

[0012] In the above-mentioned servo motor stator punching sheet, the yoke punching sheet includes a main body in the shape of an annular ring and a circle of positioning blocks formed on the inner wall of the main body. The positioning blocks are in the shape of an arc coaxial with the main body, and the two end faces of the positioning blocks are respectively arranged flush with the two end faces of the main body; the positioning blocks and the tooth bodies are the same in number, and the outer wall of the tooth body is in close contact with the inner wall of the corresponding positioning block, and the above-mentioned inner arc notch is arranged on the positioning block. The positioning block is arranged to increase the radial width of the yoke punching sheet at the inner arc notch to enhance the connection stability of the yoke punching sheet and the tooth punching sheet.

[0013] In the above-mentioned servo motor stator punching sheet, the positioning block includes an arc surface 1 in contact with the tooth body, and both sides of the arc surface 1 are transitioned to the inner peripheral surface of the main body through an inclined surface 1, and the two inclined surfaces 1 are symmetrically arranged along the center of the positioning block. The inclined surface 1 is arranged to form an avoidance to expand the wire slot formed between the yoke punching sheet and the tooth punching sheet, which is beneficial to the heat dissipation of the coil.

[0014] In the above-mentioned servo motor stator punching sheet, the outer side surface of the arc bar includes an arc surface 2 coaxial with the arc bar, and both sides of the arc surface 2 are transitioned to the outer surface of the corresponding tooth body through an inclined surface 2. The two inclined surfaces 2 are symmetrically arranged along the center of the arc surface 2, and the distance between the two inclined surfaces 2 gradually decreases from the yoke punching sheet to the tooth punching sheet to further expand the above-mentioned wire slot.

[0015] In the above-mentioned servo motor stator punching sheets, the yoke punching sheets and the tooth punching sheets are both made of silicon steel sheet material.

[0016] In the above-mentioned servo motor stator punching sheets, the thickness of the yoke punching sheets and the tooth punching sheets are the same and are both 0.1mm to 0.3mm, so as to enhance the heat dissipation of the stator punching sheets.

[0017] Compared with the prior art, the servo motor stator punching has the following advantages:

[0018] 1. By providing a rivet hole between the tooth body and the yoke punching sheet, the rivet hole cooperates with the rivet to simultaneously shape the yoke core composed of multiple yoke punching sheets and the tooth core composed of multiple tooth punching sheets during actual assembly. This not only greatly reduces the rivet investment, but also reduces the riveting process, thereby reducing the manufacturing cost of the entire stator core.

[0019] 2. The guide groove is used for installation guidance and positioning of the stator punching sheets during assembly, which facilitates the assembly of the stator core. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the stator punching sheet of the servo motor.

[0021] Figure 2 yes Figure 1 A magnified schematic diagram of center A.

[0022] Figure 3 yes Figure 1 A magnified schematic diagram of point B in the middle.

[0023] In the figure, 1, yoke punching sheet; 1a, main body; 1a1, inner arc notch; 1a2, guide groove; 1b, positioning block; 1b1, inclined surface 1; 2, tooth punching sheet; 2a, tooth body; 2a1, outer arc notch; 2b, arc strip; 2b1, arc surface 2; 2b2, inclined surface 2. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figure 1 As shown, the stator punching sheet of the servo motor includes a yoke punching sheet 1 and a tooth punching sheet 2, both of which are ring-shaped. The yoke punching sheet 1 and the tooth punching sheet 2 have the same thickness and are both made of silicon steel sheet material. The thickness of both is controlled at 0.1mm~0.3mm, and preferably the thickness of the yoke punching sheet 1 and the tooth punching sheet 2 are both 0.2mm.

[0026] in,

[0027] like Figure 1 and Figure 2As shown, the tooth punching sheet 2 includes a circle of tooth bodies 2a, the tooth bodies 2a are arc-shaped, and two adjacent tooth bodies 2a are connected by arc bars 2b, that is, at this time, arc bars 2b are set between two adjacent tooth bodies 2a, and the two ends of the arc bars 2b are respectively connected to the corresponding two tooth bodies 2a. Figure 1 As shown, the outer side wall of each tooth body 2a is in close contact and fixedly connected with the inner side wall of the yoke punching sheet 1, an outer arc notch 2a1 is axially penetrated on the outer side wall of each tooth body 2a, and an inner arc notch 1a1 matching the outer arc notch 2a1 is axially penetrated on the inner side wall of the yoke punching sheet 1, the outer arc notch 2a1 and the inner arc notch 1a1 are the same in number and have one-to-one corresponding positions, and a circular rivet hole is formed between the inner arc notch 1a1 and the outer arc notch 2a1 that have corresponding positions.

[0028] In the actual product, multiple yoke punching sheets 1 are stacked up and down to form a yoke core, and multiple tooth punching sheets 2 are stacked up and down to form a tooth core; during actual assembly, the tooth punching sheets 2 are pressed into the yoke punching sheets 1 through a specific mold, and the yoke core and the tooth core are shaped at the same time through the rivet holes and the rivets, so as to stably form the stator core.

[0029] By providing a rivet hole between the tooth body 2a and the yoke punching sheet 1, the rivet hole cooperates with the rivet to simultaneously shape the yoke core composed of multiple yoke punching sheets 1 and the tooth core composed of multiple tooth punching sheets 2 during actual assembly. This not only greatly reduces the rivet investment, but also reduces the riveting process, thereby reducing the manufacturing cost of the entire stator core.

[0030] Preferably, the cross-sections of the inner arc notch 1a1 and the outer arc notch 2a1 are both semicircular, so that the axial force generated after the rivet is riveted can be evenly distributed to the yoke punching sheet 1 and the tooth punching sheet 2, ensuring the overall structural stability of the stator core.

[0031] like Figure 1 As shown, a circle of guide grooves 1a2 is axially penetrated on the outer surface of the yoke punching sheet 1. The guide grooves 1a2 are used for installation guidance and positioning of the stator punching sheet during assembly, which facilitates the assembly of the stator core. Preferably, the cross section of the guide grooves 1a2 is in an arc shape to ensure the strength of the yoke punching sheet 1.

[0032] In this embodiment,

[0033] The specific structure of the yoke punching sheet 1 is as follows: the yoke punching sheet 1 includes a main body 1a in the shape of an annular ring and a circle of positioning blocks 1b formed on the inner wall of the main body 1a, wherein the above-mentioned guide groove 1a2 is arranged on the outer wall of the main body 1a; the positioning block 1b is in the shape of an arc coaxial with the main body 1a, and the two end faces of the positioning block 1b are respectively arranged flush with the two end faces of the main body 1a, that is, the positioning block 1b has the same thickness as the main body 1a, the positioning blocks 1b and the tooth bodies 2a have the same number, and the outer wall of the tooth bodies 2a is in close contact with the inner wall of the corresponding positioning block 1b, and the above-mentioned inner arc notch 1a1 is arranged on the positioning block 1b. The positioning block 1b is arranged to increase the radial width of the yoke punching sheet 1 at the inner arc notch 1a1 to enhance the connection stability between the yoke punching sheet 1 and the tooth punching sheet 2.

[0034] like Figure 2 As shown, it is further explained that the positioning block 1b includes an arc surface 1 in contact with the tooth body 2a, and both sides of the arc surface 1 transition to the inner peripheral surface of the main body 1a through an inclined surface 1b1, and the two inclined surfaces 1b1 are symmetrically arranged along the center of the positioning block 1b. The inclined surface 1b1 is arranged to form an avoidance to expand the wire groove formed between the yoke punching sheet 1 and the tooth punching sheet 2, which is beneficial to the heat dissipation of the coil.

[0035] like Figure 3 As shown, in the actual product, the outer side surface of the arc bar 2b includes an arc surface 2b1 coaxial with the arc bar 2b, and both sides of the arc surface 2b1 transition to the outer surface of the corresponding tooth body 2a through an inclined surface 2b2. The two inclined surfaces 2b2 are symmetrically arranged along the center of the arc surface 2b1, and the distance between the two inclined surfaces 2b2 gradually decreases from the yoke punching sheet 1 to the tooth punching sheet 2 to further expand the above-mentioned wire groove.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A servo motor stator punching sheet, comprising a yoke punching sheet (1) and a tooth punching sheet (2) both in annular shape, the tooth punching sheet (2) comprising a circle of teeth (2a), and two adjacent teeth (2a) are connected by arc strips (2b), and the outer side wall of each tooth (2a) is in close contact and fixed connection with the inner side wall of the yoke punching sheet (1), characterized in that: An outer arc notch (2a1) is axially penetrated on the outer side wall of each tooth body (2a), and an inner arc notch (1a1) matching the outer arc notch (2a1) is axially penetrated on the inner side wall of the yoke punching sheet (1), the outer arc notches (2a1) and the inner arc notches (1a1) are the same in number and have corresponding positions, and a circular rivet hole is formed between the inner arc notches (1a1) and the outer arc notches (2a1) at corresponding positions.

2. The servo motor stator punching sheet according to claim 1, characterized in that: The cross sections of the inner arc notch (1a1) and the outer arc notch (2a1) are both semicircular.

3. The servo motor stator punching sheet according to claim 1, characterized in that: A circle of guide grooves (1a2) is axially penetrated on the outer side surface of the yoke punching sheet (1).

4. The servo motor stator punching sheet according to claim 3, characterized in that: The cross section of the guide groove (1a2) is in the shape of an arc.

5. The servo motor stator punching sheet according to claim 1, characterized in that: The yoke punching sheet (1) comprises a main body (1a) in the form of an annular ring and a circle of positioning blocks (1b) formed on the inner wall of the main body (1a); the positioning blocks (1b) are in the form of an arc coaxial with the main body (1a), and the two end surfaces of the positioning blocks (1b) are respectively arranged flush with the two end surfaces of the main body (1a); the positioning blocks (1b) and the tooth bodies (2a) are of the same number, and the outer side walls of the tooth bodies (2a) are in close contact with the inner side walls of the corresponding positioning blocks (1b); and the inner arc notches (1a1) are arranged on the positioning blocks (1b).

6. The servo motor stator punching sheet according to claim 5, characterized in that: The positioning block (1b) comprises an arc surface 1 in contact with the tooth body (2a), both sides of the arc surface 1 transition to the inner circumferential surface of the main body (1a) via an inclined surface 1 (1b1), and the two inclined surfaces 1 (1b1) are symmetrically arranged along the center of the positioning block (1b).

7. The servo motor stator punching sheet according to claim 1, characterized in that: The outer side surface of the arc strip (2b) includes an arc surface 2 (2b1) coaxial with the arc strip (2b), and both sides of the arc surface 2 (2b1) transition to the outer surface of the corresponding tooth body (2a) through an inclined surface 2 (2b2). The two inclined surfaces 2 (2b2) ​​are symmetrically arranged along the center of the arc surface 2 (2b1), and the distance between the two inclined surfaces 2 (2b2) ​​gradually decreases from the yoke punching sheet (1) to the tooth punching sheet (2).

8. The servo motor stator punching sheet according to claim 1, characterized in that: The yoke punching sheet (1) and the tooth punching sheet (2) are both made of silicon steel sheet material.

9. The servo motor stator punching sheet according to claim 8, characterized in that: The thickness of the yoke punching sheet (1) and the tooth punching sheet (2) is the same and is 0.1 mm to 0.3 mm.

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