End cover clamping structure and plastic-sealed motor

Abstract

The present invention provides an end cover clamping structure and a plastic-encapsulated motor, which relate to the technical field of plastic-encapsulated motors and solve the technical problem that the anti-loosening method of the end cover of the plastic-encapsulated motor in the prior art is unreliable. The end cover clamping structure comprises a clamping member (11) arranged on the circumferential side wall (12) of the end cover body (10) and a clamping groove (21) arranged on the assembly surface (22) of the stator assembly (2) and the end cover body (10), wherein the clamping member (11) can be clamped in the clamping groove (21) to form a fixed connection between the end cover assembly (1) and the stator assembly (2). The present invention is used for assembling the end cover assembly and the stator assembly of the plastic-encapsulated motor, and the end cover assembly and the stator assembly are fixedly connected by the cooperation of the clamping member and the clamping groove, thereby effectively solving the problem of the motor end cover being loose.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic-encapsulated motors, and in particular to an end cover clamping structure and a plastic-encapsulated motor. Background Art

[0002] Plastic encapsulated motors are motors that use plastic encapsulation technology to encapsulate the stator core, windings, etc. of the motor as a whole with engineering plastics. The current plastic encapsulated motor includes a rotating shaft, a rotor assembly, a stator assembly, and an end cover, wherein the rotor assembly is mounted on the rotating shaft and then mounted inside the stator assembly, and the end cover is mounted at the end of the stator assembly. However, in existing motors with a fully plastic encapsulated structure, when the end cover is closed, the circumferential side wall of the end cover and the assembly surface of the stator assembly are interference fit. If the interference is too large, closing the cover is prone to collapse, compression damage, etc.; if the interference is too small, since the contact surface between the end cover and the stator is only one side wall, the end cover has insufficient pulling force and is easy to loosen, resulting in abnormal after-sales quality. At present, in order to avoid the problem of poor quality caused by the loosening of the end cover, a glue dispenser production process is usually adopted, which leads to high material costs and labor production costs. Summary of the invention

[0003] The purpose of the present invention is to provide an end cover snap-fit ​​structure and a plastic-encapsulated motor to solve the technical problem that the anti-loosening method of the end cover of the plastic-encapsulated motor in the prior art is unreliable. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described in detail below.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides an end cover snap-fit ​​structure, comprising a snap member arranged on the circumferential side wall of the end cover body and a snap groove arranged on the assembly surface of the stator assembly and the end cover body, wherein the snap member can be snapped into the snap groove to form a fixed connection between the end cover assembly and the stator assembly.

[0006] According to a preferred embodiment of the present invention, the clamping member is integrally formed with the end cover body.

[0007] According to a preferred embodiment of the present invention, the clamping member comprises a vertical wall, and an undercut member extends outwardly from the bottom of the vertical wall.

[0008] According to a preferred embodiment of the present invention, the undercut piece extends upward from the bottom of the vertical wall.

[0009] According to a preferred embodiment of the present invention, the vertical wall and the undercut piece are formed integrally.

[0010] According to a preferred embodiment of the present invention, the clamping member is an elastic metal member.

[0011] According to a preferred embodiment of the present invention, the vertical wall of the clamp is arranged on the outer side of the circumferential side wall of the end cover body, and the undercut extends outward from the outer side of the circumferential side wall of the end cover body.

[0012] According to a preferred embodiment of the present invention, the clamping member further comprises a fixing end extending from the top thereof in a direction opposite to the direction of the undercut member.

[0013] According to a preferred embodiment of the present invention, a plurality of the clamps are arranged at intervals along the circumferential side wall of the end cover body.

[0014] According to a preferred embodiment of the present invention, the clamping groove is arranged on the stator assembly and extends from outside to inside along the assembly surface of the stator assembly and the end cover body.

[0015] According to a preferred embodiment of the present invention, the card slot includes an introduction slot and an undercut slot, the undercut slot is arranged at a position closer to the interior of the stator assembly relative to the introduction slot and is communicated with the introduction slot, and the slot depth of the undercut slot is greater than the slot depth of the introduction slot.

[0016] According to a preferred embodiment of the present invention, a plurality of the slots are arranged at intervals along the assembly surface of the stator assembly.

[0017] According to a preferred embodiment of the present invention, the spacing distance between two adjacent card slots is consistent with the spacing distance between two adjacent card members.

[0018] The present invention further provides a plastic-encapsulated motor, comprising the end cover snap-fit ​​structure, an end cover assembly and a stator assembly, wherein the end cover assembly and the stator assembly are fixedly connected via the end cover snap-fit ​​structure.

[0019] According to a preferred embodiment of the present invention, the end cover assembly comprises an end cover body, and a bearing chamber is arranged at the bottom of the end cover body.

[0020] Based on the above technical solution, the end cover engaging structure of the embodiment of the present invention has at least the following technical effects:

[0021] By providing a clamping piece on the circumferential side wall of the end cover body and providing a clamping slot that can be clamped with the clamping piece on the assembly surface of the stator assembly, the end cover assembly is clamped and fixedly connected with the stator assembly through the cooperation of the clamping piece and the clamping slot, which effectively solves the problem of the motor end cover being loose. Moreover, when the end cover clamping structure of the embodiment of the present invention is used, there is no need to use glue to produce, thereby greatly reducing the material and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is an exploded view of the shaft end of the plastic-sealed motor of the present invention;

[0024] Figure 2 is a schematic structural diagram of an end cap assembly of the present invention;

[0025] Figure 3 It is a cross-sectional view of the end cover assembly of the plastic-encapsulated motor shaft end of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the card of the present invention;

[0027] Figure 5 is a structural schematic diagram of a stator assembly of the present invention;

[0028] Figure 6 It is a cross-sectional view of the plastic-encapsulated motor of the present invention.

[0029] In the figure: 1-end cover assembly; 2-stator assembly; 3-rotor assembly; 10-end cover body; 11-clamp; 12-circumferential side wall; 13-bearing chamber; 14-waterproof cup; 15-shaft outlet hole; 21-clamping slot; 22-assembly surface; 111-reverse fastener; 112-fixed end; 113-vertical wall; 211-introduction slot; 212-reverse fastener slot. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0031] The present invention provides an end cover snap-fit ​​structure, such as Figure 1 As shown, Figure 1An exploded view of the plastic-sealed motor of the present invention is shown. The end cover snap-fit ​​structure includes a clamp 11 arranged on the circumferential side wall 12 of the end cover body 10 and a clamping groove 21 arranged on the assembly surface 22 of the stator assembly 2 and the end cover body 10. The clamp 11 can be clamped in the clamping groove 21 to form a fixed connection between the end cover assembly 1 and the stator assembly 2. Therefore, by arranging a clamp on the circumferential side wall of the end cover body and arranging a clamping groove corresponding to the clamp on the assembly surface of the stator assembly with the end cover body, when the end cover assembly is installed on the stator assembly, the clamp on the end cover body cooperates with the clamping groove of the stator assembly to achieve the fixation of the end cover assembly and the stator assembly, which can effectively prevent the problem of the end cover from loosening. In addition, the end cover snap-fit ​​structure of the present invention does not need to be produced by dispensing glue during assembly, thereby greatly reducing material and labor costs.

[0032] Preferably, the clamping member 11 is integrally formed with the end cover body 10. Preferably, the clamping member 11 is integrally injection molded with the end cover body 10. Preferably, the clamping member 11 is an elastic metal member.

[0033] Reference Figure 4 , Figure 4 The schematic diagram of the structure of the clamp of the present invention is shown. Preferably, the clamp 11 includes a vertical wall 113, and a buckle 111 extends outward from the bottom of the vertical wall 113. Preferably, the buckle 111 extends upward from the bottom of the vertical wall 113. Preferably, the vertical wall 113 and the buckle 111 are integrally formed.

[0034] Reference Figure 2 and Figure 3 , Figure 2 The schematic diagram of the structure of the end cover assembly of the present invention is shown. Figure 3 A cross-sectional view of the end cover assembly of the present invention is shown. Preferably, the vertical wall 113 of the clamp 11 is arranged on the outer side of the circumferential side wall 12 of the end cover body 10, and the reverse fastener 111 extends outward from the outer side of the circumferential side wall 12 of the end cover body 10. Preferably, the bottom of the clamp 11 having the reverse fastener 111 is arranged at a position of the circumferential side wall 12 close to the bottom of the end cover body 10, so as to facilitate the reverse fastener 111 of the clamp 11 to be clamped in the clamping groove 21 when the end cover assembly is assembled to the stator assembly. It should be noted that the bottom of the end cover body refers to the end close to the inside of the stator assembly when the end cover body is installed in the stator assembly.

[0035] refer to Figure 4Preferably, the clamp 11 also includes a fixed end 112 extending from the top thereof in a direction opposite to the direction of the inverted snap 111. That is, the fixed end 112 and the inverted snap 111 are arranged on opposite sides of the vertical wall 113, wherein the inverted snap 111 extends outward. "Outward" refers to a direction away from the center of the end cover assembly. After the clamp 11 and the end cover body 10 are integrally formed, the fixed end 112 is placed inside the end cover body to further fix the clamp. Preferably, the fixed end 112 can be a structure with an "L"-shaped cross-section, such as Figure 4 One end of the fixed end 112 of the "L"-shaped structure is integrally formed with the vertical wall 113, and the other end freely extends downward.

[0036] like Figure 2 As shown, preferably, a plurality of clamps 11 are arranged at intervals along the circumferential side wall 12 of the end cover body 10. In the present application, "plurality" means at least 2.

[0037] like Figure 1 and Figure 5 As shown, Figure 5 The schematic diagram of the structure of the stator assembly of the present invention is shown. Preferably, the card slot 21 is arranged on the stator assembly 2 and extends from the outside to the inside along the assembly surface 22 of the stator assembly 2 and the end cover body 10. Here, "from the outside to the inside" refers to from the open end of the stator assembly to the inside of the stator assembly. Preferably, the card slot 21 includes an introduction slot 211 and an undercut slot 212. The introduction slot 211 is used to introduce and position the card 11 so that the card 11 slides in along the introduction slot 211. Among them, the undercut slot 212 is arranged at a position closer to the inside of the stator assembly 2 relative to the introduction slot 211 and is connected to the introduction slot 211. Preferably, the undercut slot 212 is arranged in a manner closer to the bottom of the assembly surface 22 relative to the introduction slot 211. The groove depth of the undercut slot 212 is greater than the groove depth of the introduction slot 211. When the end cover assembly is closed, its card 11 is positioned by the introduction slot 211 and is pressed into the stator assembly as a whole. The undercut groove 212 makes the undercut piece 111 automatically snap in, and the two cooperate with each other to clamp, so that the end cover assembly and the stator assembly are fixed, effectively solving the problem of the end cover being loose.

[0038] Preferably, a plurality of slots 21 are arranged at intervals along the assembly surface 22 of the stator assembly 2. Preferably, the interval between two adjacent slots 21 is consistent with the interval between two adjacent clamps 11, so that the clamps on the end cover body and the slots of the stator assembly form an effective clamping connection.

[0039] The present invention also provides a plastic-encapsulated motor, such as Figure 6 As shown, Figure 6The cross-sectional view of the plastic-encapsulated motor is shown. It includes the end cover snap-fit ​​structure, the end cover assembly 1 and the stator assembly 2. The end cover assembly 1 and the stator assembly 2 are fixedly connected by the end cover snap-fit ​​structure. Preferably, the end cover assembly 1 includes an end cover body 10, and a bearing chamber 13 is arranged at the bottom of the end cover body 10. Preferably, as Figure 6 As shown, when used for the motor shaft end, a waterproof cup 14 is arranged on the top of the end cover body 10 to enhance the waterproof performance of the motor. The bearing chamber 13 of the end cover assembly at the shaft end is connected to the waterproof cup 14 through the shaft hole 15. Preferably, the plastic-encapsulated motor also includes a rotor assembly 3. The rotor assembly 3 is installed inside the stator assembly 2.

[0040] Preferably, the end cover body 10 and the bearing chamber 13 are both integrally injection molded using BMC (i.e., fiber-reinforced flame-retardant unsaturated polyester globular film plastic for plastic sealing). The end cover is made of BMC material, which has enhanced corrosion resistance, effectively preventing the motor from being damaged or damaged due to oxidation and rust of the end cover, reducing after-sales expenses and improving the product image. Preferably, the stator assembly is integrally injection molded using BMC (i.e., fiber-reinforced flame-retardant unsaturated polyester globular film plastic for plastic sealing).

[0041] The end cap snap-fitting structure of the embodiment of the present invention is simple in structure and saves cost. Meanwhile, compared with the anti-loosening method in the prior art, the end cap snap-fitting structure of the embodiment of the present invention has high reliability and can effectively solve quality problems such as end cap loosening.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An end cover snap-fit ​​structure, characterized in that: It comprises a clamping member (11) arranged on a circumferential side wall (12) of an end cover body (10) and a clamping groove (21) arranged on an assembly surface (22) of a stator assembly (2) and the end cover body (10), wherein the clamping member (11) can be clamped in the clamping groove (21) so that the end cover assembly (1) and the stator assembly (2) are fixedly connected; The clamping member (11) comprises a vertical wall (113), and a buckle member (111) extends outwardly from the bottom of the vertical wall (113); The undercut piece (111) extends upward from the bottom of the vertical wall (113); The clamping groove (21) is arranged on the stator assembly (2) and extends from outside to inside along the assembly surface (22) of the stator assembly (2) and the end cover body (10); The clamping slot (21) comprises an introduction slot (211) and an undercut slot (212), wherein the undercut slot (212) is arranged at a position closer to the inside of the stator assembly (2) relative to the introduction slot (211) and is in communication with the introduction slot (211), and the slot depth of the undercut slot (212) is greater than the slot depth of the introduction slot (211); The clamping piece (11) is an elastic metal piece.

2. The end cover engaging structure according to claim 1, characterized in that: The clamping member (11) and the end cover body (10) are integrally formed.

3. The end cover engaging structure according to claim 1, characterized in that: The vertical wall (113) and the undercut piece (111) are integrally formed.

4. The end cover engaging structure according to claim 3, characterized in that: The vertical wall (113) of the clamping member (11) is arranged on the outside of the circumferential side wall (12) of the end cover body (10), and the undercut member (111) extends outward from the outside of the circumferential side wall (12) of the end cover body (10).

5. The end cover engaging structure according to claim 1, characterized in that: The clamping member (11) further comprises a fixing end (112) extending from the top thereof in a direction opposite to the direction of the undercut member (111).

6. The end cover engaging structure according to claim 1, characterized in that: A plurality of the clamping members (11) are arranged at intervals along the circumferential side wall (12) of the end cover body (10).

7. The end cover engaging structure according to claim 1, characterized in that: A plurality of the clamping grooves (21) are arranged at intervals along the assembly surface (22) of the stator assembly (2).

8. The end cover engaging structure according to claim 7, characterized in that: The spacing distance between two adjacent card slots (21) is consistent with the spacing distance between two adjacent card members (11).

9. A plastic-encapsulated motor, characterized in that: It comprises the end cover snap-fit ​​structure, the end cover assembly (1) and the stator assembly (2) according to any one of claims 1 to 8, wherein the end cover assembly (1) and the stator assembly (2) are fixedly connected via the end cover snap-fit ​​structure.

10. The plastic-encapsulated motor according to claim 9, characterized in that: The end cover assembly (1) comprises an end cover body (10), and a bearing chamber (13) is arranged at the bottom of the end cover body (10).

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