Servo motor stator coil framework mounting structure

Abstract

The utility model provides a servo motor stator coil framework mounting structure, and belongs to the technical field of machinery. The problem that an existing framework is inconvenient to install is solved. The servo motor stator coil framework installation structure comprises a yoke portion iron core and a tooth portion iron core which are both in a circular ring shape, the tooth portion iron core comprises a circle of arc-shaped protruding teeth, every two adjacent protruding teeth are connected through an arc strip, the outer side wall of each protruding tooth is fixedly connected with the inner side wall of the yoke portion iron core in a tight contact mode, a framework is a plastic integrated piece, and the outer side wall of each protruding tooth is fixedly connected with the inner side wall of the yoke portion iron core. The framework comprises a long-strip-shaped main body, and the length of the main body extends in the axial direction of the tooth iron core. An outer baffle ring and an inner baffle ring are integrally formed on the outer wall of the main body, the outer baffle ring and the inner baffle ring are arranged in parallel in the thickness direction of the main body, and an annular winding groove is formed among the outer baffle ring, the inner baffle ring and the outer wall of the main body; clamping grooves matched with the protruding teeth are formed in the main body in the thickness direction of the main body in a penetrating mode, one protruding tooth is clamped into the clamping groove, and the inner baffle rings are pressed on the two corresponding arc strips. The framework is convenient to install.

Description

Technical Field

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

[0002] The stator coil frame of a servo motor is a key component in a servo motor. It is usually made of insulating material (such as plastic) and serves to support and fix the stator coil.

[0003] Existing coil skeletons, such as a new type of coil skeleton for servo motors disclosed in the Chinese Patent Library (application number: 202021080407.7), include several skeletons and a stator core used in conjunction with the skeleton structure, characterized in that the skeleton is clamped at the upper and lower ends of the stator core, and the structures of the upper and lower skeletons are the same, wire slots are provided on the skeleton, and copper wires are wound around the upper and lower wire slots to form coils, clamping grooves are provided on both sides of the skeleton, and insulating cardboard for isolating copper wires is vertically clamped in the clamping grooves, one side of the stator core protrudes outward to form an installation step, and the other side of the stator core is provided with a groove that cooperates with the installation step structure, and each stator core is sequentially matched with the installation step and the groove to form the entire stator.

[0004] When installing the above-mentioned frame, it is necessary to first install the upper frame and the lower frame at the upper and lower ends of the stator core respectively, and then install the insulating paper separating the coil from the stator core on the frame. The whole process has many assembly steps and the operation is relatively inconvenient. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a servo motor stator coil frame installation structure which is convenient to install.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a servo motor stator coil skeleton mounting structure, including a yoke core and a tooth core, both of which are in the shape of an annulus, the tooth core including a circle of arc-shaped convex teeth, and two adjacent convex teeth are connected by arc bars, and the outer side wall of each convex tooth is tightly contacted and fixedly connected with the inner side wall of the yoke core, characterized in that the skeleton is a plastic one-piece, the skeleton includes a long strip-shaped main body, and the length of the main body extends along the axial direction of the tooth core; an outer retaining ring and an inner retaining ring, both coaxially arranged with the main body, are integrally formed on the outer wall of the main body, the outer retaining ring and the inner retaining ring are arranged side by side along the thickness direction of the main body, and an annular winding groove is formed between the outer retaining ring, the inner retaining ring and the outer wall of the main body; a slot matching the convex tooth is opened through the main body along its own thickness direction, one of the convex teeth is inserted into the slot, and the inner retaining ring is pressed on the corresponding two arc bars.

[0007] The frame is an injection-molded one-piece part, and the frame is positioned on the tooth core by inserting the convex teeth into the slots. This eliminates the need to set up additional insulating structures to separate the coil and the convex teeth, greatly reducing the number of assembly steps and effectively facilitating the installation of the frame.

[0008] In the above-mentioned servo motor stator coil frame mounting structure, the slot includes an upper plane and a lower plane arranged in parallel along the length direction of the main body, the lower plane is pressed tightly against the bottom surface of the convex tooth, and a convex strip is integrally formed on the upper plane, the length of the convex strip extends along the thickness direction of the main body, and the convex strip is pressed tightly against the top surface of the convex tooth. The upper end of the slot contacts the convex tooth through the convex strip, and under the premise of stabilizing the positioning frame, the friction formed between the slot and the convex tooth can be reduced, so that the convex tooth is easier to be inserted into the slot, which is convenient for assembly.

[0009] In the above-mentioned servo motor stator coil frame installation structure, the cross-section of the convex strip is triangular, and the width of the convex strip gradually decreases toward the convex tooth direction, so that the convex strip is easier to be deformed and attached to the convex tooth, which not only can stably position the frame, but also is more convenient for assembly.

[0010] In the above-mentioned servo motor stator coil frame mounting structure, the upper plane is formed with strip grooves on both sides of the convex strip width and are arranged along the thickness direction of the main body, and the two side edges of the convex strip respectively constitute the inner walls of the two strip grooves, so that the convex strip is easier to be compressed to both sides to cause greater deformation, thereby contacting more closely with the convex teeth, further enhancing the positioning strength and stability of the frame.

[0011] In the above-mentioned servo motor stator coil frame installation structure, there are two convex strips distributed along the circumference of the tooth core, and the above-mentioned strip grooves are arranged on both sides of the width of each convex strip to further enhance the positioning strength and stability of the frame.

[0012] In the above-mentioned servo motor stator coil frame installation structure, the thickness of the main body is smaller than the thickness of the convex teeth, so that the main body or the outer retaining ring does not contact the inner wall of the yoke core, which facilitates the assembly of the stator core.

[0013] In the above-mentioned servo motor stator coil frame installation structure, a stopper is formed on the outer wall of the outer stop ring, and one of the end faces of the yoke core is pressed on the stopper, which is used for press-fitting and limiting the yoke core and the tooth core to facilitate assembly.

[0014] In the above-mentioned servo motor stator coil frame installation structure, the stopper is in the shape of an arc coaxial with the yoke core, so as to enhance the contact area between the stopper and the yoke core and better exert the limiting effect.

[0015] In the above-mentioned servo motor stator coil frame mounting structure, the slot also includes two side surfaces distributed along the circumference of the tooth core, the side surfaces are composed of an inclined surface and an extrusion surface, the inclined surface is between the extrusion surface and the corresponding arc strip, and the two extrusion surfaces are respectively pressed tightly on the two side surfaces of the convex tooth. The inclined surface plays a guiding role, so that the convex tooth is more smoothly inserted into the slot.

[0016] Compared with the prior art, the servo motor stator coil frame installation structure has the following advantages:

[0017] 1. The frame is an injection-molded one-piece part, and the frame is positioned on the tooth core by inserting the convex teeth into the card slot. In this way, there is no need to set up an additional insulating structure to separate the coil and the convex teeth, which greatly reduces the assembly steps and effectively facilitates the installation of the frame.

[0018] 2. The upper end of the slot contacts the convex tooth through the convex strip, which can reduce the friction between the slot and the convex tooth under the premise of stable positioning of the frame, making it easier for the convex tooth to fit into the slot, which is conducive to assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the installation of the coil frame.

[0020] Figure 2 It is a schematic diagram of the connection between the coil frame and the tooth core.

[0021] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0022] Figure 4 It is a three-dimensional schematic diagram of the skeleton.

[0023] In the figure, 1, yoke core; 2, tooth core; 2a, convex teeth; 2b, arc strip; 3, skeleton; 3a, main body; 3b, outer retaining ring; 3b1, block; 3c, inner retaining ring; 3d, winding groove; 3e, clamping groove; 3f, upper plane; 3f1, convex strip; 3f2, strip groove; 3g, inclined surface; 3h, extrusion surface. 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 and Figure 2 As shown, the stator coil skeleton mounting structure of the servo motor includes a yoke core 1 and a tooth core 2, both of which are in the shape of an annulus, wherein the tooth core 2 includes a circle of arc-shaped convex teeth 2a, and two adjacent convex teeth 2a are connected by an arc bar 2b, that is, at this time, the arc bar 2b is between the two convex teeth 2a, and the two ends of the arc bar 2b are respectively connected to the two convex teeth 2a. The outer wall of each convex tooth 2a is tightly contacted and fixed with the inner wall of the yoke core 1. In the actual product, the thickness of the yoke core 1 and the tooth core 2 is the same, the yoke core 1 is formed by stacking and fixing a plurality of yoke punchings, and the tooth core 2 is formed by stacking and fixing a plurality of tooth punchings.

[0026] Specifically,

[0027] like Figure 2 and Figure 4 As shown, the skeleton 3 is a plastic integral part, which includes a main body 3a in the shape of a long strip, and the length of the main body 3a extends along the axial direction of the tooth core 2. The outer wall of the main body 3a is integrally formed with an outer retaining ring 3b and an inner retaining ring 3c, which are both coaxially arranged with the main body 3a. The outer retaining ring 3b and the inner retaining ring 3c are arranged in parallel along the thickness direction of the main body 3a, and a ring-shaped winding groove 3d is formed between the outer retaining ring 3b, the inner retaining ring 3c and the outer wall of the main body 3a. The main body 3a is penetrated along its thickness direction and is provided with a slot 3e matching the convex tooth 2a, one of the convex teeth 2a is inserted into the slot 3e, and the inner retaining ring 3c is pressed on the corresponding two arc strips 2b.

[0028] The skeleton 3 is an injection-molded integral part, and the skeleton 3 is positioned on the tooth core 2 by snapping the protruding teeth 2a into the slots 3e. This eliminates the need to provide an additional insulating structure to separate the coil and the protruding teeth 2a, thereby greatly reducing the number of assembly steps and effectively facilitating the installation of the skeleton 3.

[0029] To further explain, the inner wall of the slot 3e is composed of an upper plane 3f and a lower plane arranged in parallel along the length direction of the main body 3a and two side surfaces distributed along the circumference of the tooth core 2.

[0030] in,

[0031] like Figure 2 , Figure 3 and Figure 4 As shown, the lower plane is pressed tightly against the bottom surface of the convex tooth 2a, and a convex strip 3f1 is integrally formed on the upper plane 3f. The length of the convex strip 3f1 extends along the thickness direction of the main body 3a, and the convex strip 3f1 is pressed tightly against the top surface of the convex tooth 2a. The upper end of the slot 3e contacts the convex tooth 2a through the convex strip 3f1. Under the premise of stable positioning of the skeleton 3, the friction formed between the slot 3e and the convex tooth 2a can be reduced, so that the convex tooth 2a is easier to be inserted into the slot 3e, which is convenient for assembly. Preferably, the convex strip 3f1 and the slot 3e have the same length. Further explanation: the cross section of the convex strip 3f1 is triangular, and the width of the convex strip 3f1 gradually decreases toward the convex tooth 2a, so that the convex strip 3f1 is easier to be deformed and attached to the convex tooth 2a, which can not only stably position the skeleton 3, but also facilitate assembly. Furthermore, the upper plane 3f is formed with strip grooves 3f2 on both sides of the width of the convex strip 3f1 and are arranged along the thickness direction of the main body 3a, and the two side edges of the convex strip 3f1 respectively constitute the inner walls of the two strip grooves 3f2, so that the convex strip 3f1 can be more easily compressed to both sides to cause greater deformation, thereby making closer contact with the convex tooth 2a, further enhancing the positioning strength and stability of the skeleton 3.

[0032] In the actual product, there are two convex strips 3f1 distributed along the circumference of the tooth core 2, and the above-mentioned strip grooves 3f2 are provided on both sides of the width of each convex strip 3f1 to further enhance the positioning strength and stability of the skeleton 3.

[0033] like Figure 4 As shown, the side surface is composed of an inclined surface 3g and an extrusion surface 3f, the inclined surface 3g is located between the extrusion surface 3f and the corresponding arc strip 2b, and the two extrusion surfaces 3f are respectively pressed tightly on the two side surfaces of the convex tooth 2a. The inclined surface 3g plays a guiding role, so that the convex tooth 2a is more smoothly inserted into the slot 3e.

[0034] like Figure 1 and Figure 2 As shown, the thickness of the main body 3a is less than the thickness of the convex tooth 2a, so that neither the main body 3a nor the outer retaining ring 3b contacts the inner wall of the yoke core 1, which facilitates the assembly of the stator core. A stopper 3b1 is formed on the outer wall of the outer retaining ring 3b, and one of the end faces of the yoke core 1 is pressed on the stopper 3b1, which is used for the press-fitting limit of the yoke core 1 and the tooth core 2, which is convenient for assembly. Preferably, the stopper 3b1 is in the shape of a circular arc coaxial with the yoke core 1 to strengthen the contact area between the stopper 3b1 and the yoke core 1, so as to better exert the limit effect.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this 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 coil frame mounting structure, comprising a yoke core (1) and a tooth core (2) both in annular shape, the tooth core (2) comprising a circle of arc-shaped convex teeth (2a), and two adjacent convex teeth (2a) are connected by arc bars (2b), and the outer side wall of each convex tooth (2a) is in close contact and fixed connection with the inner side wall of the yoke core (1), characterized in that: The skeleton (3) is a plastic integral part, comprising a main body (3a) in the form of an elongated strip, and the length of the main body (3a) extends along the axial direction of the tooth core (2); an outer retaining ring (3b) and an inner retaining ring (3c) are integrally formed on the outer wall of the main body (3a), both of which are coaxially arranged with the main body (3a); the outer retaining ring (3b) and the inner retaining ring (3c) are arranged in parallel along the thickness direction of the main body (3a), and an annular winding groove (3d) is formed between the outer retaining ring (3b), the inner retaining ring (3c) and the outer wall of the main body (3a); a clamping groove (3e) matching with the convex tooth (2a) is provided through the main body (3a) along its thickness direction, wherein one of the convex teeth (2a) is clamped in the clamping groove (3e), and the inner retaining ring (3c) is pressed on the corresponding two arc strips (2b).

2. The servo motor stator coil frame mounting structure according to claim 1, characterized in that: The clamping groove (3e) comprises an upper plane (3f) and a lower plane arranged in parallel along the length direction of the main body (3a), the lower plane being pressed tightly against the bottom surface of the convex tooth (2a), and a convex strip (3f1) being integrally formed on the upper plane (3f), the length of the convex strip (3f1) extending along the thickness direction of the main body (3a), and the convex strip (3f1) being pressed tightly against the top surface of the convex tooth (2a).

3. The servo motor stator coil frame mounting structure according to claim 2, characterized in that: The cross section of the convex strip (3f1) is triangular, and the width of the convex strip (3f1) gradually decreases towards the convex tooth (2a).

4. The servo motor stator coil frame mounting structure according to claim 3, characterized in that: The upper plane (3f) is formed with strip grooves (3f2) on both sides of the width of the convex strip (3f1) and are arranged to penetrate along the thickness direction of the main body (3a), and the two side edges of the convex strip (3f1) respectively form the inner walls of the two strip grooves (3f2).

5. The servo motor stator coil frame mounting structure according to claim 4, characterized in that: There are two convex strips (3f1) distributed along the circumference of the tooth core (2), and the above-mentioned strip-shaped grooves (3f2) are arranged on both sides of the width of each convex strip (3f1).

6. The servo motor stator coil frame mounting structure according to claim 1, characterized in that: The thickness of the main body (3a) is smaller than the thickness of the protruding teeth (2a).

7. The servo motor stator coil frame mounting structure according to claim 1, characterized in that: A stopper (3b1) is formed on the outer wall of the outer stopper ring (3b), and one of the end faces of the yoke core (1) is pressed onto the stopper (3b1).

8. The servo motor stator coil frame mounting structure according to claim 7, characterized in that: The stopper (3b1) is in the shape of an arc coaxial with the yoke core (1).

9. The servo motor stator coil frame mounting structure according to claim 1, characterized in that: The slot (3e) further comprises two side surfaces distributed along the circumference of the tooth core (2), the side surfaces being composed of an inclined surface (3g) and an extrusion surface (3h), the inclined surface (3g) being located between the extrusion surface (3h) and the corresponding arc strip (2b), and the two extrusion surfaces (3h) being respectively pressed tightly against the two side surfaces of the convex tooth (2a).

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