Motor stator mounting structure

Abstract

The utility model provides a motor stator mounting structure, and belongs to the technical field of motors. The connecting structure solves the problem that an existing connecting structure easily causes damage to a stator. The motor stator installation structure comprises a machine barrel and a stator core arranged in the machine barrel, a circle of strip-shaped convex teeth are formed on the outer side wall of the stator core, the strip-shaped convex teeth are in interference fit with the inner side wall of the middle of the machine barrel, and the inner side wall of the lower end of the machine barrel is in transition connection with the inner side wall of the middle of the machine barrel through an annular groove. The annular groove is defined by an upper side wall, a lower side wall and a bottom wall located between the upper side wall and the lower side wall, the inner diameter of the bottom wall is larger than that of the middle of the machine barrel, the inner diameter of the lower side wall is smaller than the outer diameter of the stator core, and the bottom face of the stator core is tightly pressed on the lower side wall. According to the utility model, the press-fitting damage of the stator core can be reduced.

Description

Technical Field

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

[0002] An electric motor is a device that converts electrical energy into mechanical energy, and generally includes a casing and a stator assembly and a rotor assembly both disposed in the casing.

[0003] Among them, the stator assembly includes a stator core, and the connection method of the stator core and the casing is such as a fixing structure of a brushless motor stator and a casing disclosed in the Chinese Patent Library (application number: 202020918419.6), including a stator, a plurality of convex teeth are evenly spaced on the outer wall of the stator, and a plurality of stator tooth portions for fixing the enameled wire are evenly spaced on the inner wall of the stator, the stator tooth portion includes a winding plate and a baffle, one end of the winding plate is connected to the inner wall of the stator, and the other end of the winding plate is connected to the baffle; a casing, which is sleeved on the outer wall of the stator, the casing is interference fit with the plurality of convex teeth, and the inner wall of the casing is provided with a limiting convex plate for resisting the stator.

[0004] The above-mentioned fixing structure uses a limiting boss to limit the stator pressing position. Since the stator is pressed with great force and the limiting boss completely protrudes from the inner wall of the casing and is in a suspended state, the limiting boss is likely to be tilted under force during the limiting process, resulting in excessive pressing of the stator and damage to the stator and the casing. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a motor stator installation structure to solve the technical problem of how to reduce press-fit damage.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a motor stator mounting structure, including a barrel and a stator core arranged in the barrel, a circle of strip-shaped convex teeth is formed on the outer wall of the stator core, and an interference fit is formed between the strip-shaped convex teeth and the inner wall of the middle part of the barrel, characterized in that the inner wall of the lower end of the barrel is transitionally connected with the inner wall of the middle part of the barrel through an annular groove, and the annular groove is coaxially arranged with the barrel; the annular groove is surrounded by an upper side wall, a lower side wall and a bottom wall between the upper side wall and the lower side wall, the inner diameter of the bottom wall is larger than the inner diameter of the middle part of the barrel, the inner diameter of the lower side wall is smaller than the outer diameter of the stator core, and the bottom surface of the stator core is pressed tightly against the lower side wall.

[0007] The barrel utilizes the annular lower side wall to contact the bottom surface of the stator core, which can more stably limit the stator core and prevent the stator core from excessively moving backwards. At the same time, an annular groove is provided so that there is a gap between the lower end of the stator core and the barrel to better release the stress generated during the cold extrusion process, thereby effectively reducing the damage to the barrel and the stator core during press-fitting, thereby improving the life of the motor and working stability.

[0008] In the above-mentioned motor stator mounting structure, the above-mentioned annular groove is formed in one step by machining, which is convenient for machining and forming.

[0009] In the above-mentioned motor stator mounting structure, the upper side wall is a conical surface whose diameter gradually increases from top to bottom, so that the tool used for processing the annular groove can be quickly withdrawn, further facilitating the processing.

[0010] In the above-mentioned motor stator mounting structure, a bearing seat is formed on the bottom wall of the barrel, which is annular and coaxial with the barrel, and the upper and lower ends of the bearing seat are respectively inside and outside the barrel; a convex rib is formed horizontally on the inner side of the bottom wall of the barrel, and the two ends of the rib extend to the inner side wall of the lower end of the barrel and the outer side wall of the upper end of the bearing seat. Under the action of the rib, the strength of the inner side wall of the lower end of the barrel can be effectively strengthened to provide stronger support for the lower side wall, thereby more stably limiting the stator core.

[0011] In the above-mentioned motor stator mounting structure, there are multiple convex ribs which are evenly distributed along the circumference of the barrel.

[0012] In the above motor stator mounting structure, a rib is formed on the outer side of the bottom wall of the barrel, the length of the rib extends along the radial direction of the barrel, and one end of the rib extends to the outer side wall of the lower end of the bearing seat. The rib can further strengthen the inner side wall strength of the lower end of the barrel.

[0013] In the above-mentioned motor stator mounting structure, a reinforcement ring is formed on the outer side of the bottom wall of the barrel, and the reinforcement ring is coaxially arranged with the barrel; the bearing seat is located on the inner side of the reinforcement ring, and the end of the rib not connected to the bearing seat extends to the inner wall of the reinforcement ring.

[0014] In the above-mentioned motor stator mounting structure, there are multiple ribs which are evenly distributed along the circumference of the barrel.

[0015] Compared with the prior art, the motor stator mounting structure is provided with a barrel that utilizes an annular lower side wall to contact the bottom surface of the stator core, which can more stably limit the stator core and prevent the stator core from excessively moving backwards; at the same time, an annular groove is provided so that there is a gap between the lower end of the stator core and the barrel to better release the stress generated during the cold extrusion process, thereby effectively reducing the damage to the barrel and the stator core during press-fitting, so as to improve the life and working stability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the stator installation structure of this motor.

[0017] Figure 2 yes Figure 1 A magnified schematic diagram of center A.

[0018] Figure 3 It is a structural diagram of the stator core.

[0019] Figure 4 It is a three-dimensional schematic diagram of the barrel.

[0020] In the figure, 1, barrel; 1a, annular groove; 1b, upper side wall; 1c, lower side wall; 1d, bottom wall; 1e, bearing seat; 1g, convex rib; 1h, rib; 1i, reinforcement ring; 2, stator core; 2a, bar-shaped convex teeth. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1 and Figure 3 As shown, the stator mounting structure of the motor includes a barrel 1 and a stator core 2 disposed in the barrel 1, and a circle of strip-shaped convex teeth 2a is formed on the outer wall of the stator core 2, the length of the strip-shaped convex teeth 2a extends along the axial direction of the stator core 2, and the circle of strip-shaped convex teeth 2a is evenly distributed along the circumference of the stator core 2. In actual products, an interference fit is formed between the strip-shaped convex teeth 2a and the inner wall of the middle part of the barrel 1.

[0023] The inner side wall at the lower end of the barrel 1 is transitionally connected to the inner side wall at the middle of the barrel 1 through the annular groove 1a, and the annular groove 1a is coaxially arranged with the barrel 1. Figure 1 and Figure 2 As shown, the annular groove 1a is surrounded by an upper side wall 1b, a lower side wall 1c and a bottom wall 1d between the upper side wall 1b and the lower side wall 1c, and the upper side wall 1b, the lower side wall 1c and the bottom wall 1d are all annular. Among them, the inner diameter of the bottom wall 1d is larger than the inner diameter of the middle part of the barrel 1; the inner diameter of the lower side wall 1c is smaller than the outer diameter of the stator core 2, and the bottom surface of the stator core 2 is tightly pressed on the lower side wall 1c.

[0024] The barrel 1 utilizes the annular lower side wall 1c to contact the bottom surface of the stator core 2, which can more stably limit the stator core 2 and prevent the stator core 2 from excessively moving backward; at the same time, an annular groove 1a is provided so that there is a gap between the lower end of the stator core 2 and the barrel 1 to better release the stress generated during the cold extrusion process, thereby effectively reducing the damage to the barrel 1 and the stator core 2 during press-fitting, so as to improve the life of the motor and working stability.

[0025] In actual products, the annular groove 1a is formed in one step by machining, which is convenient for machining. Further explanation, the upper side wall 1b is a conical surface with a diameter gradually increasing from top to bottom, so that the tool used for machining the annular groove 1a can be quickly withdrawn, further facilitating machining.

[0026] like Figure 1 As shown, a bearing seat 1e in an annular shape and coaxial with the barrel 1 is formed on the bottom wall 1d of the barrel 1, and the upper and lower ends of the bearing seat 1e are respectively located inside and outside the barrel 1. A convex rib 1g is horizontally formed on the inner side of the bottom wall 1d of the barrel 1, and the two ends of the convex rib 1g extend to the inner side wall of the lower end of the barrel 1 and the outer side wall of the upper end of the bearing seat 1e, respectively. There are multiple convex ribs 1g and they are evenly distributed along the circumference of the barrel 1. Under the action of the convex rib 1g, the strength of the inner side wall of the lower end of the barrel 1 can be effectively strengthened to provide stronger support for the lower side wall 1c, thereby more stably limiting the stator core 2.

[0027] Further explanation, such as Figure 1 and Figure 4 As shown, a rib 1h is formed on the outer side of the bottom wall 1d of the barrel 1, and the length of the rib 1h extends radially along the barrel 1, and one end of the rib 1h extends to the outer side wall of the lower end of the bearing seat 1e, and there are multiple ribs 1h and they are evenly distributed along the circumference of the barrel 1. The rib 1h is provided to further strengthen the strength of the inner side wall of the lower end of the barrel 1. Further explanation, a reinforcement ring 1i is also formed on the outer side of the bottom wall 1d of the barrel 1, and the reinforcement ring 1i is coaxially arranged with the barrel 1; the bearing seat 1e is located on the inner side of the reinforcement ring 1i, and the end of the rib 1h that is not connected to the bearing seat 1e extends to the inner side wall of the reinforcement ring 1i.

[0028] 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 motor stator mounting structure, comprising a barrel (1) and a stator core (2) disposed in the barrel (1), wherein a circle of strip-shaped convex teeth (2a) is formed on the outer wall of the stator core (2), and an interference fit is formed between the strip-shaped convex teeth (2a) and the inner wall of the middle portion of the barrel (1), characterized in that: The inner side wall of the lower end of the barrel (1) is transitionally connected to the inner side wall of the middle part of the barrel (1) through an annular groove (1a), and the annular groove (1a) is coaxially arranged with the barrel (1); the annular groove (1a) is surrounded by an upper side wall (1b), a lower side wall (1c) and a bottom wall (1d) located between the upper side wall (1b) and the lower side wall (1c); the inner diameter of the bottom wall (1d) is larger than the inner diameter of the middle part of the barrel (1), the inner diameter of the lower side wall (1c) is smaller than the outer diameter of the stator core (2), and the bottom surface of the stator core (2) is tightly pressed against the lower side wall (1c).

2. The motor stator mounting structure according to claim 1, characterized in that: The annular groove (1a) is formed in one step by machining.

3. The motor stator mounting structure according to claim 2, characterized in that: The upper side wall (1b) is a conical surface whose diameter gradually increases from top to bottom.

4. The motor stator mounting structure according to claim 1, 2 or 3, characterized in that: A bearing seat (1e) is formed on the bottom wall (1d) of the barrel (1) and is annular and coaxial with the barrel (1), and the upper and lower ends of the bearing seat (1e) are respectively located inside and outside the barrel (1); a convex rib (1g) is formed horizontally on the inner side of the bottom wall (1d) of the barrel (1), and the two ends of the convex rib (1g) extend to the inner side wall of the lower end of the barrel (1) and the outer side wall of the upper end of the bearing seat (1e), respectively.

5. The motor stator mounting structure according to claim 4, characterized in that: There are a plurality of convex ribs (1g) which are evenly distributed along the circumference of the barrel (1).

6. The motor stator mounting structure according to claim 5, characterized in that: A rib (1h) is formed on the outer side of the bottom wall (1d) of the barrel (1), the length of the rib (1h) extends in the radial direction of the barrel (1), and one end of the rib (1h) extends to the outer side wall of the lower end of the bearing seat (1e).

7. The motor stator mounting structure according to claim 6, characterized in that: A reinforcement ring (1i) is also formed on the outer side of the bottom wall (1d) of the barrel (1), and the reinforcement ring (1i) is coaxially arranged with the barrel (1); the bearing seat (1e) is located on the inner side of the reinforcement ring (1i), and the end of the rib (1h) not connected to the bearing seat (1e) extends to the inner side wall of the reinforcement ring (1i).

8. The motor stator mounting structure according to claim 7, characterized in that: There are a plurality of ribs (1h) which are evenly distributed along the circumference of the barrel (1).

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