Fusing type fuse structure for motor stator

Abstract

The utility model discloses a fusing type fuse structure for a motor stator, which comprises a stator framework (1), a stator winding is wound outside the stator framework (1), the middle part of the stator winding is connected with a fuse (3), the fuse (3) is buckled on the surface of the stator framework (1) through a buckling piece (4), and a protective cover (5) which is buckled and connected with the stator framework (1) is arranged outside the fuse (3). One end of the protective cover (5) extends outwards and is buckled and connected with a Hall mounting frame (2) for mounting a Hall sensor through a positioning pin (6); the stator framework (1), the stator winding and the protective cover (5) are wrapped by a plastic-coated layer (7), one side of the plastic-coated layer (7) forms a mounting port (8) for accommodating the Hall mounting rack (2), and the positioning pin (6) is located in the mounting port (8). According to the utility model, the protection effect on the fuse in the motor stator can be improved.

Description

Technical Field

[0001] This utility model relates to a motor stator, and more particularly to a fusible fuse structure for a motor stator. Background Technology

[0002] To improve the stability and safety of motors during operation, manufacturers currently install thermal fuses on the power connection line between the power supply and the stator windings. When the temperature of the stator windings rises to a threshold, the fuse melts, cutting off the current flowing to the stator windings and providing overheat protection. Building on this, traditional fuses are fitted with heat-shrinkable insulating sleeves to prevent deformation or breakage under stress. However, this protective structure has relatively poor stability and cannot completely isolate external impacts. This makes the fuse prone to breakage under stress during later stages of motor assembly, plastic coating, and installation, affecting the motor's structural stability.

[0003] Therefore, a motor stator safety structure with good protection is needed. Utility Model Content

[0004] The purpose of this invention is to provide a fusible fuse structure for motor stators. It improves the protection of the fuses inside the motor stator.

[0005] The technical solution of this utility model is as follows: A fusible fuse structure for a motor stator includes a stator frame, a stator winding wound around the outside of the stator frame, a fuse connected to the middle of the stator winding, the fuse being fastened to the surface of the stator frame by a snap-fit ​​device, a protective cover for fastening and connecting the fuse to the stator frame, one end of the protective cover extending outward and fastened to a Hall sensor mounting bracket by a positioning pin; the stator frame, stator winding, and protective cover are covered with a plastic coating layer, one side of the plastic coating layer forming a mounting opening for accommodating the Hall sensor mounting bracket, and the positioning pin being located inside the mounting opening.

[0006] In the aforementioned fusible fuse structure for a motor stator, one side of the protective cover is fastened to the stator frame via a surrounding plate, the surrounding plate being located around the fastener and integrally formed with the stator frame; winding posts for winding are distributed around the stator frame, the winding posts being integrally formed with the stator frame, and the other side of the protective cover is fastened to the stator frame via the winding posts.

[0007] In the aforementioned fusible fuse structure for motor stator, the protective cover is provided with a first latch and a second latch for fastening and connecting the winding post. The first latch and the upper end of the winding post are fully fastened together, and a gap for filling the plastic coating layer is formed between the second latch and the winding post. The plastic coating layer completely fills the gap after molding.

[0008] In the aforementioned fuse-type safety structure for motor stator, several stator supports are distributed in a ring around the stator frame, and some stator supports have positioning grooves at their outer ends. One end of the protective cover extends to the outer end of the stator support and is fastened to the positioning groove by a positioning block.

[0009] In the aforementioned fusible fuse structure for motor stator, the number of positioning blocks is three, which are arranged side by side at the lower end of the protective cover. The two side walls of one positioning block are in contact with the outer walls of the two stator supports, and the other two positioning blocks are fastened to the positioning grooves of the two stator supports.

[0010] In the aforementioned fusible fuse structure for motor stator, the Hall mounting bracket is provided with interconnected screw holes and limiting grooves. The Hall mounting bracket is fastened to a positioning pin via the limiting groove. A fixing screw is provided in the screw hole, and the end of the fixing screw passes through the Hall mounting bracket and is threaded to the positioning pin.

[0011] Compared with the prior art, this utility model has the following characteristics:

[0012] (1) Through the structural cooperation of the stator frame and the protective cover, this utility model enables the protective cover to shield and protect the fuse from the outside after installation, thereby effectively improving the stability of the fuse during subsequent assembly and use; by fastening the protective cover to the stator frame and setting a positioning pin at the outer end of the protective cover, the protective cover can be used to position the Hall mounting frame after installation, thereby improving the functionality of the protective cover and the positioning accuracy of the Hall mounting frame; by setting a plastic coating layer on the outside of the stator frame, stator winding and protective cover, on the one hand, the plastic coating layer can be used to wrap the protective cover to prevent the possibility of the protective cover loosening and falling off, and on the other hand, it can also play a positioning function for the protective cover, that is, to prevent the protective cover from shifting during later use, thereby ensuring the installation accuracy of the Hall sensor;

[0013] (2) By limiting the connection method between the protective cover and the stator frame, on the one hand, the cooperation of the winding post and the surrounding plate can realize the snap-fit ​​positioning of the protective cover on the stator frame, that is, improve its fixing effect; on the other hand, the plastic coating layer can be used to completely fill the gap between the second bayonet and the winding post, so that the three can be connected to each other to form an integrated structure, further reducing the possibility of the protective cover loosening.

[0014] (3) By fastening the outer end of the protective cover to the positioning groove of the stator bracket through the positioning block, the positioning pin can be positioned relative to the stator bracket, which further improves the positioning accuracy of the Hall mounting bracket during installation; by connecting the Hall mounting bracket to the protective cover through the fixing screw, the Hall mounting bracket can be installed after the motor stator is completely wrapped with plastic, which facilitates the later disassembly and replacement of the Hall sensor.

[0015] Therefore, this invention can improve the protection effect on the fuse inside the motor stator. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure after the plastic coating layer has been removed;

[0018] Figure 3 yes Figure 2 A magnified view from direction A;

[0019] Figure 4 This is a schematic diagram showing the connection between the positioning block and the positioning groove;

[0020] Figure 5 Figure 2 This is a structural diagram after the protective cover has been removed;

[0021] Figure 6 This is an outline drawing of the Hall effect mounting bracket.

[0022] The labels in the attached diagram are as follows: 1-Stator frame, 2-Hall mounting bracket, 3-Fuse, 4-Snap fastener, 5-Protective cover, 6-Positioning pin, 7-Plastic coating, 8-Mounting port, 9-Enclosure plate, 10-Winding post, 11-First bayonet, 12-Second bayonet, 13-Stator bracket, 14-Positioning groove, 15-Positioning block, 16-Screw hole, 17-Limiting groove. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0024] Example. A fuse-type safety structure for an electric motor stator, configured as follows: Figure 1 As shown, the device includes a stator frame 1, with stator windings wound around its exterior. A fuse 3 is connected to the middle of the stator windings. The fuse 3 automatically disconnects when the temperature of the stator windings reaches a threshold, preventing the motor from continuing to overheat. The fuse 3 is fastened to the surface of the stator frame 1 via a snap-fit ​​device 4. A protective cover 5 is provided on the outside of the fuse 3 to fasten and connect to the stator frame 1. One end of the protective cover 5 extends outward and is fastened and connected to a Hall sensor mounting bracket 2 via a positioning pin 6. The stator frame 1, stator windings, and protective cover 5 are covered with a plastic coating layer 7. One side of the plastic coating layer 7 forms a mounting opening 8 for accommodating the Hall sensor mounting bracket 2. The positioning pin 6 is located inside the mounting opening 8.

[0025] The number of fuses 3 is two, which are connected in series through pierced terminals, and the external connection of the two fuses 3 is the stator winding.

[0026] One side of the protective cover 5 is fastened to the stator frame 1 via a surrounding plate 9. The surrounding plate 9 is located around the fastener 4 and is integrally formed with the stator frame 1. The stator frame 1 is provided with winding posts 10 for winding, which are integrally formed with the stator frame 1. The other side of the protective cover 5 is fastened to the stator frame 1 via the winding posts 10.

[0027] The protective cover 5 is provided with a first latch 11 and a second latch 12 for fastening and connecting the winding post 10. There are two first latches 11 located at the left and right ends of the protective cover 5, and there are multiple second latches 12 located between the two first latches 11. The first latch 11 and the upper end of the winding post 10 are completely fastened together, and a gap is formed between the second latch 12 and the winding post 10 for filling the plastic coating layer 7. The plastic coating layer 7 completely fills the gap after molding.

[0028] The stator frame 1 has several stator supports 13 arranged in a ring around its perimeter. Some of the stator supports 13 have positioning grooves 14 at their outer ends. One end of the protective cover 5 extends to the outer end of the stator support 13 and is fastened to the positioning grooves 14 by a positioning block 15.

[0029] The number of positioning blocks 15 is three, and they are arranged side by side at the lower end of the protective cover 5. The two side walls of one positioning block 15 are in contact with the outer walls of the two stator supports 13, and the other two positioning blocks 15 are fastened to the positioning grooves 14 of the two stator supports 13.

[0030] After molding, the plastic coating layer 7 completely wraps the positioning block 15 together with the stator bracket 13.

[0031] The Hall mounting bracket 2 is provided with interconnected screw holes 16 and limiting grooves 17. The Hall mounting bracket 2 is fastened to the positioning pin 6 via the limiting groove 17. A fixing screw is provided in the screw hole 16. The end of the fixing screw passes through the Hall mounting bracket 2 and is threaded to the positioning pin 6. The middle part of the positioning pin 6 is provided with a threaded hole for connecting the fixing screw.

[0032] The working principle of this utility model is as follows: A protective cover 5 is installed outside the fuse 3 to shield and protect it, preventing damage from external objects and improving the structural stability and service life of the fuse 3. By interlocking the protective cover 5 with the stator frame 1, the protective cover 5 can be positioned and used as a connector for the Hall effect mounting bracket 2. This allows the Hall effect mounting bracket 2 to be directly screwed onto the positioning pin 6 during later installation, achieving quick positioning and detachable connection. A plastic coating layer 7 is installed outside the stator frame 1 and the protective cover 5 to connect and fix them together, preventing the protective cover 5 from loosening or shifting during later use, thus ensuring the positioning accuracy and installation stability of the Hall effect mounting bracket 2.

Claims

1. A fuse-type safety structure for a motor stator, comprising a stator frame (1), a stator winding wound around the outside of the stator frame (1), and a fuse (3) connected to the middle of the stator winding, characterized in that: The fuse (3) is fastened to the surface of the stator frame (1) by a snap fastener (4). The fuse (3) is provided with a protective cover (5) that is fastened to the stator frame (1). One end of the protective cover (5) extends outward and is fastened to a Hall mounting bracket (2) for mounting a Hall sensor by a positioning pin (6). The stator frame (1), stator winding and protective cover (5) are covered with a plastic coating layer (7). One side of the plastic coating layer (7) forms a mounting opening (8) for accommodating the Hall mounting bracket (2). The positioning pin (6) is located inside the mounting opening (8).

2. The fuse-type safety structure for a motor stator according to claim 1, characterized in that: One side of the protective cover (5) is fastened to the stator frame (1) via a surrounding plate (9). The surrounding plate (9) is located around the fastener (4) and is integrally formed with the stator frame (1). The stator frame (1) is provided with winding posts (10) for winding. The winding posts (10) and the stator frame (1) are integrally formed. The other side of the protective cover (5) is fastened to the stator frame (1) via the winding posts (10).

3. The fuse-type safety structure for a motor stator according to claim 2, characterized in that: The protective cover (5) is provided with a first latch (11) and a second latch (12) for fastening and connecting the winding post (10). The first latch (11) and the upper end of the winding post (10) are fully fastened together. A gap is formed between the second latch (12) and the winding post (10) for filling the plastic coating layer (7). The plastic coating layer (7) completely fills the gap after molding.

4. The fuse-type safety structure for a motor stator according to claim 1, characterized in that: The stator frame (1) has several stator supports (13) arranged in a ring around it. Some of the stator supports (13) have positioning grooves (14) at their outer ends. One end of the protective cover (5) extends to the outer end of the stator support (13) and is fastened to the positioning groove (14) by a positioning block (15).

5. The fuse-type safety structure for a motor stator according to claim 4, characterized in that: The number of positioning blocks (15) is three and they are arranged side by side at the lower end of the protective cover (5). The two side walls of one positioning block (15) are in contact with the outer walls of the two stator supports (13), and the other two positioning blocks (15) are fastened to the positioning grooves (14) of the two stator supports (13).

6. The fuse-type safety structure for a motor stator according to claim 1, characterized in that: The Hall mounting bracket (2) is provided with interconnected screw holes (16) and limiting grooves (17). The Hall mounting bracket (2) is fastened to the positioning pin (6) through the limiting groove (17). The screw holes (16) are provided with fixing screws. The end of the fixing screw passes through the Hall mounting bracket (2) and is threaded to the positioning pin (6).

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