Novel magnet fixing structure of miniature direct-current motor

Abstract

The utility model relates to the technical field of miniature direct-current motors, and discloses a novel magnet fixing structure of a miniature direct-current motor, which comprises a machine cover shell, the front side and the rear side of the machine cover shell are straight edges, the two sides of the machine cover shell are arc edges, a groove is arranged at the bottom of the machine cover shell, and a magnet is arranged in the groove. According to the miniature direct-current brush motor, the problems that according to an existing miniature direct-current brush motor, when a magnet is fixed, ribs need to be formed on the surface of a machine shell, but the magnet and the ribs have tolerance in position, so that the magnet and the ribs are possibly matched too tightly, the magnet cannot be plugged into the machine shell, and the machine shell cannot be damaged are solved. The magnet cannot be fixed and needs to be dispensed if the magnet and the shell are matched loosely, but the outer diameter of the magnet is tightly matched with the inner diameter of the shell, and glue is not easy to permeate between the magnet and the shell, can only stay on the end face of the magnet, is not firm in bonding and is easy to fall off, so that the use effect of the device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro DC motor technical field, concretely is a novel magnet fixing structure of micro DC motor. BACKGROUND

[0002] The micro DC motor is a rotating motor with DC output or input, and the efficiency of the micro DC motor is generally higher than that of other types of motors, so that the micro DC motor has a smaller size for the same output power.

[0003] In the use of micro DC motor, the traditional micro DC brush motor needs to punch a rib on the surface of the shell to fix the magnet, but the magnet has a tolerance, and the position of the rib also has a tolerance, which may cause the magnet to be too tight to be inserted into the shell or the magnet to be pressed off powder during insertion into the shell, and the magnet cannot be fixed if the fit is loose, which requires glue, but the glue cannot easily penetrate between the magnet and the shell and can only stay on the end face of the magnet, so the magnet is not firmly bonded and is easy to fall off, thereby reducing the use effect of the device. UTILITY MODEL CONTENTS

[0004] The utility model discloses a novel magnet fixing structure of micro DC motor, which solves the problem of the existing micro DC brush motor that the magnet needs to be fixed on the surface of the shell by punching a rib to fix the magnet, but the magnet has a tolerance, and the position of the rib also has a tolerance, which may cause the magnet to be too tight to be inserted into the shell or the magnet to be pressed off powder during insertion into the shell, and the magnet cannot be fixed if the fit is loose, which requires glue, but the glue cannot easily penetrate between the magnet and the shell and can only stay on the end face of the magnet, so the magnet is not firmly bonded and is easy to fall off, thereby reducing the use effect of the device.

[0005] To achieve the above object, the utility model provides the following technical scheme: A novel magnet fixing structure of micro DC motor, including the cover shell, the front and back two sides of cover shell are all set to straight edge, the both sides of cover shell are all set to arc edge, the bottom of cover shell is provided with recess, the inside top surface of recess is close to the both sides of arc edge and is all fixedly connected with two limit blocks, the inside top surface of recess is close to the both sides of edge and is all fixedly pasted with magnet block, and the outside surface of one side of magnet block is fixedly connected with the outside surface of one side of limit block, the inside wall of two arc edges is close to the center and is all fixedly connected with clamping block, and the clamping block is limitedly connected with magnet block.

[0006] As a preferred implementation form, the gap is provided between the two magnet blocks and the arc edge.

[0007] As a preferred implementation form, the top of the cover shell is provided with a through hole close to the center.

[0008] As a preferred implementation form, the inside of the through hole is provided with a circular truncated cone shaft.

[0009] As a preferred implementation form, the top of the cover shell is provided with a terminal hole close to the both sides of edge.

[0010] As a preferred implementation form, the inside wall of the opposite side of the two straight edges is provided with an air outlet close to the both sides of edge.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model discloses, through the fixedness of limit block, magnet block is limited and fixed conveniently, when magnet block falls off inadvertently in the process of using, through clamping block, magnet block is limited with arc edge, then drips into anaerobic glue water in the inside of gap, so that magnet block can be fully adsorbed, when magnet is loaded into cover shell, the inside wall of cover shell and magnet block in the middle form a space part gap, anaerobic glue water flows into magnet block and cover shell between along the inside of this space part gap to bond fully, so that magnet block is convenient for pasting and fixing on cover shell, thereby improve the use effect of device, further, through the circular truncated cone shaft inside the through hole, connect micro motor in the circular truncated cone shaft, through terminal hole welding terminal, so that micro motor is convenient for working, so that the device is convenient for effectively using, through the setting of air outlet, the heat generated by the inside motor is convenient for dissipating, so that the device is convenient for effectively using. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A front view of the novel magnet fixing structure of micro DC motor is provided for the utility model;

[0014] Figure 2 This is a side view schematic diagram of a novel magnet fixing structure for a micro DC motor proposed in the utility model;

[0015] Figure 3 This is a bottom-up perspective structural diagram of a novel magnet fixing structure for a micro DC motor proposed in the present invention;

[0016] Figure 4 This utility model proposes a new magnet fixing structure for a micro DC motor. Figure 3 Schematic diagram of the three-dimensional structure at point A in the middle.

[0017] In the figure: 1. Machine cover shell; 2. Groove; 3. Limiting block; 4. Magnet block; 5. Card block; 6. Gap; 7. Through hole; 8. Cone shaft; 9. Terminal hole; 10. Exhaust vent; 11. Straight edge; 12. Arc edge. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] See also Figures 1-4The utility model provides a technical solution: a new magnet fixing structure for a micro DC motor, comprising a cover shell 1, the front and rear sides of the cover shell 1 are both set as straight edges 11, and both sides of the cover shell 1 are set as arc edges 12. A groove 2 is provided at the bottom of the cover shell 1, and two limiting blocks 3 are fixedly connected to the inner top surface of the groove 2 near the two sides of the arc edge 12. Magnet blocks 4 are fixedly attached to the edges of the inner top surface of the groove 2 near both sides, and one side outer surface of the magnet block 4 is fixedly connected to the outer surface of one side of the limiting block 3. A clamping block 5 is fixedly connected to the inner surface wall of the two arc edges 12 near the center, and the clamping block 5 A limiting connection is established between the magnet blocks 4, and a gap 6 is provided between the two magnet blocks 4 and the arc edge 12. The fixing of the limiting block 3 makes it easy for the magnet blocks 4 to be restricted and fixed. When the magnet blocks 4 accidentally fall off during use, the clamping block 5 is used to restrict the magnet blocks 4 and the arc edge 12, and then anaerobic glue is dripped into the inside of the gap 6 so that the magnet blocks 4 can be fully adsorbed. When the magnet is installed in the cover shell 1, a space gap 6 will be formed between the middle of the magnet block 4 and the inner wall of the cover shell 1, and the anaerobic glue will flow along the inside of the space gap 6 between the magnet block 4 and the cover shell 1 to fully bond them.

[0021] A through hole 7 is provided near the center of the top of the cover shell 1 , and a frustum shaft 8 is installed inside the through hole 7 , through which the micro motor is fixed, making it easy for the device to work.

[0022] Terminal holes 9 are provided on the top of the cover shell 1 near the edges on both sides, and the terminals on the motor are connected through the terminal holes 9, making it easy for the device to perform conductive work.

[0023] Exhaust vents 10 are provided on the inner surface wall of the opposite side of the two straight edges 11 near the edges on both sides. The arrangement of the exhaust vents 10 facilitates the dissipation of heat generated by the internal motor.

[0024] Working principle: when the device is used, first through the fixed limit block 3, so that the magnet block 4 is convenient to limit fixed, when the magnet block 4 is inadvertently dropped in the process of use, through the card block 5 will magnet block 4 and arc edge 12 limit, then in the gap gap 6 inside drop anaerobic glue, so that the magnet block 4 can be fully adsorbed, when the magnet is loaded into the cover shell 1, the magnet block 4 middle and cover shell 1 inner wall will form a space part gap gap 6, anaerobic glue will follow this space part gap gap 6 inside flow into the magnet block 4 and cover shell 1 between to fully bond, so that the magnet block 4 is convenient to stick on the cover shell 1 and fixed, so as to improve the use effect of the device, further, through the through hole 7 inside setting has round table shaft 8, in the round table shaft 8 inside connecting micro motor, through the terminal hole 9 welding terminal, so that the micro motor is convenient to work, so that the device is convenient to use effectively, through the setting of exhaust port 10, so that the heat generated by the internal motor is convenient to dissipate, so that the device is convenient to use effectively.

[0025] The above is only the preferred embodiment of the present application, not other forms of the present application, any skilled in the art of technical personnel may use the above disclosed technical content to change or modify the equivalent embodiment of equivalent changes applied to other fields, but any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the protection scope of the present application technical scheme.

Claims

1. A novel magnet fixing structure for a micro DC motor, comprising a cover shell (1), characterized in that: The front and rear sides of the cover shell (1) are both set as straight edges (11), and the two sides of the cover shell (1) are both set as arc edges (12). A groove (2) is provided at the bottom of the cover shell (1), and two limiting blocks (3) are fixedly connected to the inner top surface of the groove (2) near the two sides of the arc edge (12). Magnet blocks (4) are fixedly attached to the inner top surface of the groove (2) near the edges on both sides, and the outer surface of one side of the magnet block (4) is fixedly connected to the outer surface of one side of the limiting block (3). The inner surface walls of the two arc edges (12) are both fixedly connected to a clamping block (5) near the center, and the clamping block (5) and the magnet block (4) are restrictedly connected.

2. The novel magnet fixing structure for a micro DC motor according to claim 1, characterized in that: A gap (6) is provided between the two magnet blocks (4) and the arc edge (12).

3. The novel magnet fixing structure for a micro DC motor according to claim 1, characterized in that: A through hole (7) is provided near the center of the top of the cover shell (1).

4. The novel magnet fixing structure for a micro DC motor according to claim 3, characterized in that: A frustum shaft (8) is installed inside the through hole (7).

5. The novel magnet fixing structure for a micro DC motor according to claim 1, characterized in that: Terminal holes (9) are provided on the top of the cover shell (1) near the edges on both sides.

6. The novel magnet fixing structure for a micro DC motor according to claim 1, characterized in that: Air outlets (10) are provided on the inner surface wall of the opposite side of the two straight edges (11) near the edges on both sides.

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