Motor injection molding stator assembly
By injection molding the stator core and the machine base together to form an integral stator assembly, the cumbersome problem of the injection molding process in the prior art is solved, a simpler and more stable processing process is achieved, and the structural stability of the stator assembly is improved.
Patent Information
- Application Number
- CN202420097683.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-16
AI Technical Summary
During the production process, existing injection molded stator components require separate injection molding of the stator core bracket and the iron core. The operation is complicated and the steps are numerous, resulting in complex processing.
Design a motor injection molding stator assembly, in which the stator core and the machine base are connected first and then placed together in the injection mold for injection molding, forming an integral stator assembly, the hollow shaft is sealed with the plastic body, and the structural stability is enhanced by screw connection, and through The plastic body formed by injection molding covers the stator core and winding to simplify the processing steps.
The stator core and machine base are not required to be injection-molded separately, which simplifies the processing process and enhances the structural stability and machining convenience of the stator assembly.
Smart Images
Figure CN222191923U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motors and relates to a motor stator component, in particular to a motor injection stator component. Background Art
[0002] The injection molded stator assembly usually consists of a plastic part and a stator, in which the plastic part is tightly integrated with the stator through the injection molding process, so that the molded stator assembly has higher precision and stability.
[0003] Existing injection molded stator assemblies, such as an injection molded outer rotor motor stator assembly disclosed in the China Patent Library (application number: 202110067839.7), include an injection molded stator core bracket, an injection molded stator core, and an injection molded material shell. After the injection molded stator core bracket and the injection molded stator core are assembled, they are die-cast on the injection molded material shell through an injection mold, thereby injection-molding an integral injection molded outer rotor motor stator assembly.
[0004] When producing the above-mentioned stator assembly, the stator core bracket and the stator core need to be separately and independently injection-molded, and then the molded stator core bracket and the stator core need to be pressed into a plastic shell for secondary injection molding. The entire operation arrangement is relatively complex and the processing is relatively cumbersome. Utility Model Content
[0005] The utility model aims to solve the above problems in the prior art and proposes a motor injection stator component that is easy to process.
[0006] The purpose of the utility model can be achieved through the following technical solutions: a motor injection molded stator assembly, characterized in that it includes a base, a stator core fixed to the front side of the base, a winding arranged on the stator core, and a plastic body injection molded on the front side of the base, the stator core and the winding are sealed in the plastic body; the base extends forward to form an integral hollow shaft, the hollow shaft is also sealed in the plastic body, and the stator core is sleeved on the hollow shaft, the rear end of the hollow shaft is open, and the side wall of the hollow shaft is penetrated by a wire outlet hole for allowing the cable connected to the winding to extend out.
[0007] During processing, the stator core and the machine base are first connected, and then the combination of the stator core and the machine base is placed in an injection mold for injection molding, so that the plastic liquid not only completely wraps the stator core, but also fills the gap between the stator core and the machine base and the stator core winding slots, thereby injection molding an integral stator assembly. The entire process does not require separate injection molding of the stator core and the machine base, which greatly omits the operating steps and facilitates processing.
[0008] In the above-mentioned injection molded stator assembly of the motor, the front end surface of the above-mentioned hollow shaft is pressed on the plastic body, a screw is arranged in the hollow shaft, and the screw rod extends out of the front end of the hollow shaft and is screwed into the plastic body. The base is connected to the plastic body again through the hollow shaft and the screw, so as to greatly enhance the structural stability of the stator assembly.
[0009] In the above-mentioned motor injection stator assembly, the shape and size of the middle part of the hollow shaft match the inner hole of the stator core, and the stator core is sleeved on the middle part of the hollow shaft; the outer wall of the middle part of the hollow shaft is also formed with a ring-shaped shoulder surface for the rear end of the stator core to press against. The above-mentioned design is used for guiding and limiting the installation of the stator core, which is convenient for assembly.
[0010] In the above-mentioned injection-molded stator assembly of the motor, an annular bearing inner ring is sleeved and fixed on both the front and rear ends of the plastic body.
[0011] In the above-mentioned motor injection-molded stator assembly, the bearing inner ring and the plastic body are formed into a whole by injection molding.
[0012] In the above-mentioned motor injection molded stator assembly, an inner convex ring is formed on the inner circumference of the bearing inner ring, the inner convex ring is coaxial with the bearing inner ring, and the inner convex ring is buried in the plastic body to greatly enhance the connection strength between the bearing inner ring and the plastic body.
[0013] In the above-mentioned injection-molded stator assembly of the motor, the front end of the plastic body is in a constricted shape to reduce the size of the inner ring of the bearing at the front end and reduce the cost.
[0014] In the above-mentioned injection-molded stator assembly of the motor, the front end of the hollow shaft extends to the front end of the plastic body.
[0015] In the above-mentioned motor injection molded stator assembly, the front side wall of the base is composed of a plurality of annular steps continuously distributed along the axial direction of the hollow shaft. During injection molding, the plastic body is formed according to the front side wall of the base, which can greatly enhance the bonding strength between the plastic body and the base.
[0016] In the above-mentioned injection-molded stator assembly of the motor, a circle of through holes axially penetrates the base, the through holes are located outside the plastic body, and the through holes and the plastic body are staggered to facilitate the installation and positioning of the stator assembly.
[0017] Compared with the prior art, the motor injection stator assembly has the following advantages:
[0018] 1. During processing, first connect the stator core and the base, then put the combination of the stator core and the base into the injection mold for injection molding to form an integral stator assembly. The whole process does not require separate injection molding of the stator core and the base, which greatly omits the operating steps and facilitates processing.
[0019] 2. The base is connected to the plastic body again through a hollow shaft and screws to greatly enhance the structural stability of the stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a three-dimensional schematic diagram of the injection-molded stator assembly of the motor.
[0021] Figure 2 It is a cross-sectional schematic diagram of the injection molded stator assembly of the motor.
[0022] In the figure, 1, machine base; 1a, hollow shaft; 1a1, shaft shoulder surface; 1b, wire outlet hole; 1c, annular step; 1d, through hole; 2, stator core; 3, plastic body; 4, screws; 5, bolts; 6, bearing inner ring; 6a, inner convex ring. DETAILED DESCRIPTION
[0023] 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.
[0024] like Figure 1 and Figure 2 As shown, the injection molded stator assembly of the motor includes a base 1, a stator core 2 fixed to the front side of the base 1, a winding arranged on the stator core 2, and a plastic body 3 injection molded on the front side of the base 1. The stator core 2 and the winding are sealed in the plastic body 3; the base 1 extends forward to form an integral hollow shaft 1a, which is also sealed in the plastic body 3, and the stator core 2 is sleeved on the hollow shaft 1a. The rear end of the hollow shaft 1a is open, and a wire outlet hole 1b is provided on the side wall of the hollow shaft 1a for the cable connected to the winding to extend out.
[0025] During processing, the stator core 2 and the base 1 are first connected, and then the combination of the stator core 2 and the base 1 is placed in an injection mold for injection molding, so that the plastic liquid not only completely wraps the stator core 2, but also fills the gap between the stator core 2 and the base 1 and the winding slots of the stator core 2, thereby injection molding an integral stator assembly. The whole process does not require separate injection molding of the stator core 2 and the base 1, which greatly omits the operating steps and facilitates processing.
[0026] Further, the front end surface of the hollow shaft 1a is pressed on the plastic body 3, a screw 4 is arranged in the hollow shaft 1a, and the rod of the screw 4 extends out of the front end of the hollow shaft 1a and is screwed into the plastic body 3. The base 1 is connected to the plastic body 3 again through the hollow shaft 1a and the screw 4, so as to greatly enhance the structural stability of the stator assembly.
[0027] In this embodiment, the stator core 2 and the base 1 are connected as follows: the stator core 2 is fixed to the base 1 by a circle of bolts 5; further explained, the shape and size of the middle part of the hollow shaft 1a match the inner hole of the stator core 2, and the stator core 2 is sleeved outside the middle part of the hollow shaft 1a; the outer wall of the middle part of the hollow shaft 1a is also formed with a ring-shaped shoulder surface 1a1 for the rear end of the stator core 2 to press against, which is used for installation guidance and limitation of the stator core 2 to facilitate assembly.
[0028] like Figure 1 and Figure 2 As shown, the front and rear ends of the plastic body 3 are sleeved and fixed with an annular bearing inner ring 6, and the type of the bearing inner ring 6 can be a ceramic ring or a graphite ring. Naturally, the type of the bearing inner ring 6 can also be a conventional rolling bearing inner ring 6. Preferably, the bearing inner ring 6 and the plastic body 3 are formed into a whole by injection molding. Further explanation, an inner convex ring 6a is formed on the inner circumferential surface of the bearing inner ring 6, and the inner convex ring 6a is coaxial with the bearing inner ring 6, and the inner convex ring 6a is buried in the plastic body 3, so as to greatly enhance the connection strength between the bearing inner ring 6 and the plastic body 3.
[0029] like Figure 1 As shown, the front end of the plastic body 3 is in a constricted shape, and the front end of the hollow shaft 1a extends to the front end of the plastic body 3, so as to reduce the size of the bearing inner ring 6 at the front end and reduce the cost.
[0030] In the actual product, the front side wall of the base 1 is composed of a plurality of annular steps 1c distributed continuously along the axial direction of the hollow shaft 1a. During injection molding, the plastic body 3 is molded according to the front side wall of the base 1, which can greatly enhance the bonding strength between the plastic body 3 and the base 1. A circle of through holes 1d is axially penetrated through the base 1. The through holes 1d are located outside the plastic body 3, and the positions of the through holes 1d and the plastic body 3 are staggered, which facilitates the installation and positioning of the stator assembly. Preferably, the through holes 1d are arranged on the bottom wall of the annular step 1c at the rear side.
[0031] 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. Motor injection molding stator assembly, characterized in that: The invention comprises a machine base (1), a stator core (2) fixed to the front side of the machine base (1), a winding arranged on the stator core (2), and a plastic body (3) injection-molded on the front side of the machine base (1), wherein the stator core (2) and the winding are both sealed in the plastic body (3); the machine base (1) extends forward to form an integrally formed hollow shaft (1a), the hollow shaft (1a) is also sealed in the plastic body (3), and the stator core (2) is sleeved on the hollow shaft (1a), the rear end of the hollow shaft (1a) is open, and a wire outlet hole (1b) is provided on the side wall of the hollow shaft (1a) for allowing a cable connected to the winding to extend out.
2. The motor injection molded stator assembly according to claim 1, characterized in that: The front end surface of the hollow shaft (1a) is pressed against the plastic body (3), a screw (4) is arranged inside the hollow shaft (1a), and the rod of the screw (4) extends out of the front end of the hollow shaft (1a) and is screwed into the plastic body (3).
3. The motor injection molded stator assembly according to claim 2, characterized in that: The shape and size of the middle portion of the hollow shaft (1a) match the inner hole of the stator core (2), and the stator core (2) is sleeved on the middle portion of the hollow shaft (1a); the outer wall of the middle portion of the hollow shaft (1a) is also formed with a ring-shaped shaft shoulder surface (1a1) for the rear end of the stator core (2) to press against.
4. The motor injection molded stator assembly according to claim 1, 2 or 3, characterized in that: An annular bearing inner ring (6) is sleeved and fixed on both the front and rear ends of the plastic body (3).
5. The motor injection molded stator assembly according to claim 4, characterized in that: The bearing inner ring (6) and the plastic body (3) are formed into a whole by injection molding.
6. The motor injection molded stator assembly according to claim 5, characterized in that: An inner convex ring (6a) is formed on the inner circumferential surface of the bearing inner ring (6); the inner convex ring (6a) is coaxial with the bearing inner ring (6), and the inner convex ring (6a) is buried in the plastic body (3).
7. The motor injection molded stator assembly according to claim 1, characterized in that: The front end of the plastic body (3) is in a constricted shape.
8. The motor injection molded stator assembly according to claim 7, characterized in that: The front end of the hollow shaft (1a) extends to the front end of the plastic body (3).
9. The motor injection molded stator assembly according to claim 1, characterized in that: The front side wall of the machine base (1) is composed of a plurality of annular steps (1c) continuously distributed along the axial direction of the hollow shaft (1a).
10. The motor injection molded stator assembly according to claim 1, characterized in that: A circle of through holes (1d) is axially penetrated through the machine base (1); the through holes (1d) are located outside the plastic body (3); and the through holes (1d) and the plastic body (3) are staggered.