Motor front end protective cover

Abstract

The utility model discloses a motor front end protection cover, which is installed at the front end of a stator body and used for protecting a coil, and comprises a coil protection cover used for covering the exposed coil at the front end of the stator body and a cover plate connected with the coil protection cover, and the cover plate is provided with a shaft hole for a motor shaft to pass through. The two sides of the cover plate are respectively provided with a connecting pin, the two connecting pins are respectively connected with the stator body through a fastener, the coil protection cover surrounds the two connecting pins, the rear end of the coil protection cover abuts against the stator body, the front end of the coil protection cover is provided with an upper opening through which the cover plate can penetrate, and the upper opening is provided with a lower opening through which the cover plate can penetrate. The inner edge of the upper opening is provided with a plurality of elastic sheets extending towards the center direction of the coil protection cover, and the inner end parts of the elastic sheets abut against the inner side of the cover plate. The utility model has the advantage of convenience in disassembly and assembly, and is favorable for early-stage assembly production and later-stage disassembly and maintenance operation.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a front-end protection cover for a motor. Background Art

[0002] The motor end cover is mainly an important component for fixing or supporting the stator and the rotor. The lead wire of a traditional motor needs to pass through the rear end cover or the front end cover of the motor.

[0003] The invention patent with the patent application number CN201811527522.1 discloses a front-end cover of a motor. It realizes the installation of the cover on the motor by arranging motor connection holes on the cover plate and then installing fasteners (such as screws) on the motor connection holes. When installing the cover plate, it is necessary to first install the coil protection cover on the stator body, and then install the cover plate on the coil protection cover through fasteners. The operation steps of rotating the screws with a screwdriver are numerous, and the disassembly and assembly operations are relatively troublesome, which is not conducive to the pre-assembly production and the subsequent disassembly and maintenance operations. Content of the Utility Model

[0004] The purpose of the utility model is to provide a front-end protection cover for a motor, which has the advantages of convenient disassembly and assembly, and is conducive to the pre-assembly production and the subsequent disassembly and maintenance operations.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A front-end protection cover for a motor, which is installed at the front end of the stator body to protect the coil, includes a coil protection cover for covering the coil exposed at the front end of the stator body inside and a cover plate connected to the coil protection cover. A shaft hole for the motor shaft to pass through is provided on the cover plate. One connecting foot is provided on each side of the cover plate, and the two connecting feet are respectively connected to the stator body through a fastener. The coil protection cover surrounds the two connecting feet inside. The rear end of the coil protection cover abuts tightly against the stator body. An upper opening through which the cover plate can pass is provided at the front end of the coil protection cover. A plurality of elastic pieces extending towards the center direction of the coil protection cover are provided at the inner edge of the upper opening, and the inner end portions of the elastic pieces abut tightly against the inner side of the cover plate.

[0006] By adopting the above technical solution, a coil protection cover is arranged on the stator body to cover the part of the coil corresponding to the front end of the stator body exposed outside, so as to protect the coil and avoid damage caused by the coil being collided by other components when exposed outside, which can significantly improve the safety performance and service life of the motor. When installing the coil protection cover and the cover plate, the two connecting feet of the cover plate can be first connected to the stator body through fasteners, the coil protection cover is sleeved on the outer periphery of the two connecting feet of the cover plate, and a plurality of elastic pieces on the coil protection cover are pressed to the inner side of the cover plate to limit and cover the coil between the cover plate and the stator body. When disassembling, only the elastic pieces need to be pushed out to extract the coil protection cover, and the disassembly and assembly operations are very convenient, which is beneficial to the pre-assembly production and the subsequent disassembly and maintenance operations.

[0007] The present utility model is further configured such that a relief recess is provided at a position corresponding to both sides of the elastic piece on the coil protection cover.

[0008] By adopting the above technical solution, when disassembling the coil protection cover, it is convenient to insert a tool to the bottom of the elastic piece to pry out the elastic piece and release the restriction on the coil protection cover.

[0009] The present utility model is further configured such that a positioning convex portion extending outward is provided at a portion where the connecting foot is connected to the stator body, and a positioning groove adapted to the positioning convex portion is provided on the rear end face of the coil protection cover.

[0010] By adopting the above technical solution, the coil protection cover is positioned, which can improve the firmness of the installation of the coil protection cover.

[0011] The present utility model is further configured such that a relief groove extending to the front end face is provided on the side of the connecting foot, a first mounting hole for the fastener to pass through is provided at a position corresponding to the inner end of the relief groove on the connecting foot, and a window communicating with the relief groove is provided on the side of the coil protection cover.

[0012] By adopting the above technical solution, the operating space is larger, which greatly facilitates the disassembly and assembly of the fasteners.

[0013] The present utility model is further configured such that a guiding rib extending vertically is provided on each side of the connecting foot, a limiting rib extending vertically is provided at a position corresponding to the side of each elastic piece on the inner side of the coil protection cover, a positioning guide groove is formed between the limiting rib and the corresponding elastic piece, and the guiding rib is disposed in the corresponding positioning guide groove.

[0014] By adopting the above technical solution, the coil protection cover is guided, which not only facilitates its installation operation, but also has a limiting effect, further improving the stability of its installation structure.

[0015] The present utility model is further configured such that the positions on both sides of the cover plate corresponding to the connecting wires of the two connecting feet are respectively a flat portion and a convex arc portion, and a second mounting hole is respectively provided at a position near both ends of the flat portion and at a position near the center of the arc surface of the cover plate. The shape of the upper opening of the coil protection cover is equivalent to the shape of the cover plate.

[0016] By adopting the above technical solution, three second mounting holes can be provided on the cover plate in a smaller volume, facilitating the passing of fasteners for connection with a speed reducer or other components.

[0017] The present utility model is further configured such that an arc-shaped concave portion is provided inside the coil protection cover and is recessed inward for making way for the coil.

[0018] By adopting the above technical solution, a more suitable installation space can be provided for the coil, and the structural reliability is high.

[0019] The present utility model is further configured such that a positioning flange for bearing positioning is provided at a position inside the cover plate corresponding to the inner side of the shaft hole.

[0020] By adopting the above technical solution, the bearing can be positioned to ensure the stability of the bearing installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the whole motor;

[0022] Figure 2 It is a schematic structural diagram of the motor with the coil protection cover and the cover plate removed;

[0023] Figure 3 It is a schematic assembled structural diagram of the coil protection cover and the cover plate;

[0024] Figure 4 It is a schematic structural diagram of the cover plate;

[0025] Figure 5 It is a schematic structural diagram of the coil protection cover.

[0026] In the figure: 1, stator body; 2, coil; 3, coil protection cover; 4, cover plate; 5, shaft hole; 6, connecting foot; 7, upper opening; 8, elastic sheet; 9, relief recess; 10, positioning protrusion; 11, positioning groove; 12, relief groove; 13, first mounting hole; 14, window; 15, guiding rib; 16, limiting rib; 17, positioning guide groove; 18, flat portion; 19, arc portion; 20, second mounting hole; 21, arc-shaped concave portion; 22, positioning flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0028] Embodiment: As shown in the attached Figures 1 to 5 motor front-end protection cover, which is installed at the front end of the stator body 1 for protecting the coil 2, includes a coil protection cover 3 for covering the coil 2 exposed at the front end of the stator body 1 inside and a cover plate 4 connected to the coil protection cover 3. An axial hole 5 for the motor shaft to pass through is provided on the cover plate 4. A connecting foot 6 is provided on each side of the cover plate 4, and the two connecting feet 6 are respectively connected to the stator body 1 through a fastener. The coil protection cover 3 surrounds the two connecting feet 6 inside. The rear end of the coil protection cover 3 abuts tightly against the stator body 1. The front end of the coil protection cover 3 is provided with an upper opening 7 through which the cover plate 4 can pass. A plurality of elastic pieces 8 extending towards the center direction of the coil protection cover 3 are provided at the inner edge of the upper opening 7. The elastic pieces 8 and the coil protection cover 3 are of an integral structure. Due to their narrow and thin characteristics, they have certain elastic properties. The inner end portions of the elastic pieces 8 abut tightly against the inner side of the cover plate 4. By providing the coil protection cover 3 on the stator body 1 to cover the part of the coil 2 exposed at the front end of the stator body 1, the coil 2 is protected, and damage caused by the coil 2 being collided by other components due to being exposed is avoided, which can significantly improve the safety performance and service life of the motor. When installing the coil protection cover 3 and the cover plate 4, the two connecting feet 6 of the cover plate 4 can be first connected to the stator body 1 through fasteners, the coil protection cover 3 is sleeved on the outer periphery of the two connecting feet 6 of the cover plate 4, and the plurality of elastic pieces 8 on the coil protection cover 3 are pressed to the inner side of the cover plate 4 to limit between the cover plate 4 and the stator body to cover the coil 2. When disassembling, only the elastic pieces 8 need to be pushed out to extract the coil protection cover 3, and the disassembly and assembly operations are very convenient, which is conducive to the pre-assembly production and the later disassembly and maintenance operations.

[0029] As shown in the attached Figures 1 to 3 As shown, a relief recess 9 is provided at the position corresponding to both sides of the elastic piece 8 on the coil protection cover 3. This design facilitates inserting a tool to the bottom of the elastic piece 8 to pry out the elastic piece 8 when disassembling the coil protection cover 3 to release the restriction on the coil protection cover 3.

[0030] As shown in the attached Figures 3 to 5As shown, the part where the connecting foot 6 is connected to the stator body 1 is provided with a positioning protrusion 10 extending outward, and the rear end surface of the coil protection cover 3 is provided with a positioning groove 11 that fits with the positioning protrusion 10. This design positions the coil protection cover 3 and can improve the firmness of the installation of the coil protection cover 3.

[0031] As attached Figure 3 As shown, the side of the connecting foot 6 is provided with a clearance groove 12 extending to the front end surface, the connecting foot 6 is provided with a first mounting hole 13 for fasteners to pass through at a position corresponding to the inner end of the clearance groove 12, and the side of the coil protection cover 3 is provided with a window 14 connected to the clearance groove 12. This design has a larger operating space and greatly facilitates the disassembly and assembly of fasteners.

[0032] As attached Figures 3 to 5 As shown, a guide rib 15 extending vertically is respectively provided on both sides of the connecting foot 6, and a limiting convex rib 16 extending vertically is provided at the position corresponding to the side of each elastic sheet 8 on the inner side of the coil protection cover 3, and a positioning guide groove 17 is formed between the limiting convex rib 16 and the corresponding elastic sheet 8, and the guide rib 15 is arranged in the corresponding positioning guide groove 17. This design guides the coil protection cover 3, which is not only convenient for its installation operation, but also has a limiting function, further improving the stability of its installation structure.

[0033] As attached Figures 3 to 5 As shown, the positions of the cover plate 4 corresponding to the two sides of the connection line of the two connecting feet 6 are respectively a flat surface 18 and a convex curved surface 19, which can be understood as a structure after a cut is made on a circular plate. The cover plate 4 is provided with a second mounting hole 20 at the positions close to both ends of the flat surface 18 and the position close to the center of the curved surface, and the shape of the upper opening 7 of the coil protection cover 3 is equivalent to that of the cover plate 4. This design can set three second mounting holes 20 on the cover plate 4 in a smaller volume, so that it is convenient to penetrate fasteners and connect with the reducer or other components.

[0034] The inner side of the coil protection cover 3 is provided with an arc-shaped recessed portion 21 which is recessed inwardly for making way for the coil 2. This design can provide a more suitable installation space for the coil 2, and the structural reliability is high.

[0035] As attached Figures 3 to 5 As shown, the cover plate 4 is provided with a positioning flange 22 for bearing positioning at a position corresponding to the inner side of the shaft hole 5, and the bearing positioning is realized by cooperating with the limiting step on the motor shaft. This design can position the bearing and ensure the stability of the bearing installation.

Claims

1. The front-end protective cover of the motor is installed at the front end of the stator body (1) for protecting the coil (2). It includes a coil protective cover (3) for covering the coil (2) exposed at the front end of the stator body (1) inside and a cover plate (4) connected to the coil protective cover (3). An axial hole (5) for the motor shaft to pass through is provided on the cover plate (4), and it is characterized in that: On both sides of the cover plate (4), a connecting foot (6) is respectively provided. The two connecting feet (6) are respectively connected to the stator body (1) through a fastener. The coil protection cover (3) surrounds the two connecting feet (6) therein. The rear end of the coil protection cover (3) abuts tightly against the stator body (1). The front end of the coil protection cover (3) is provided with an upper opening (7) through which the cover plate (4) can pass. At the inner edge of the upper opening (7), a plurality of elastic pieces (8) extending towards the center direction of the coil protection cover (3) are provided. The inner end portions of the elastic pieces (8) abut tightly against the inner side of the cover plate (4).

2. The front-end protection cover of the motor according to claim 1, characterized in that: At positions corresponding to both sides of the elastic piece (8) on the coil protection cover (3), a relief recess (9) is provided.

3. The motor front end protection cover according to claim 1, characterized in that: At the position where the connecting foot (6) is connected to the stator body (1), a positioning convex portion (10) extending outwards is provided. On the rear end face of the coil protection cover (3), a positioning groove (11) matching the positioning convex portion (10) is provided.

4. The motor front-end protection cover according to claim 1, characterized in that: On the side portion of the connecting foot (6), a relief groove (12) extending to the front end face is provided. At the position corresponding to the inner end of the relief groove (12) on the connecting foot (6), a first mounting hole (13) for the fastener to pass through is provided. On the side portion of the coil protection cover (3), a window (14) communicating with the relief groove (12) is provided.

5. The motor front-end protection cover according to claim 1, characterized in that: On both sides of the connecting foot (6), a guiding rib (15) extending vertically is respectively provided. On the inner side of the coil protection cover (3), at positions corresponding to the side of each elastic piece (8), a limiting convex rib (16) extending vertically is provided. A positioning guide groove (17) is formed between the limiting convex rib (16) and the corresponding elastic piece (8). The guiding rib (15) is arranged in the corresponding positioning guide groove (17).

6. The motor front-end protection cover according to claim 1, characterized in that: At positions corresponding to both sides of the connection line of the two connecting feet (6) on the cover plate (4), a flat portion (18) and a convex arc surface portion (19) are respectively provided. At positions near both ends of the flat portion (18) and near the center of the arc surface on the cover plate (4), a second mounting hole (20) is respectively provided. The shape of the upper opening (7) of the coil protection cover (3) is equivalent to the shape of the cover plate (4).

7. The motor front-end protection cover according to claim 1, characterized in that: On the inner side of the coil protection cover (3), an arc-shaped recess (21) is provided which is recessed inwards to make way for the coil (2).

8. The front-end protection cover of the motor according to claim 1, characterized in that: At the position corresponding to the inner side of the shaft hole (5) on the cover plate (4), a positioning flange (22) for bearing positioning is provided.

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