Commutator structure for preventing pole pieces from loosening of miniature direct-current motor

Abstract

The utility model discloses a commutator structure for preventing pole piece loosening of a miniature DC motor, comprising a motor housing, the inner side surface of the motor housing is fixedly connected with a stator, the inner front end of the motor housing is provided with a front end bearing, and the inner rear end of the motor housing is provided with a rear end bearing. According to the utility model, through the arrangement of the riveting structures, when the pole piece structures are installed, after the pole piece structures are installed on the surface of the axis through the spacer bushes to form the commutator structure, the riveting structures are inserted into the L-shaped grooves, and the positions of the pole piece structures are fixed when the pole piece structures are used through the riveting structures; the end of a winding wire can be fixed on the telescopic hook for wire hanging, winding processing is facilitated, the pole piece fixing stability and the winding wire hanging convenience are improved, winding wire breakage is effectively prevented, the production efficiency is improved, and the reject ratio is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro direct current motor technical field especially relates to a kind of commutator structure of preventing pole piece loosening of micro direct current motor. BACKGROUND

[0002] Micro direct current motor is a small and efficient electric drive device, it uses direct current power generation power, is widely used in various small electronic equipment, such as toy, household appliance, medical equipment etc..This kind of motor has the advantages such as small size, light weight, fast response, simple control, and its core components include stator, rotor and commutator.In micro direct current motor, rotor commutator plays a vital role, it is responsible for converting electrical energy into mechanical energy, and ensures that motor can continue to run steadily.

[0003] However, the existing micro direct current motor rotor commutator has some technical problems in design, and the general direct current brush motor rotor commutator on the market often does not have the structure of skeleton with rivet mark, which leads to insufficient fixing of pole piece, and it is easy to loosen in production and manufacturing process, and this loosening phenomenon is particularly obvious in copper wire winding stage, and the displacement of pole piece may cause winding difficulty, and then cause motor open circuit defect, in addition, even after winding, since pole piece may still move upward, this instability will pull the copper wire that has been wound, increase the risk of motor wire breakage, thereby affecting the performance and reliability of motor, these problems limit the application range of micro direct current motor, and pose a challenge to production efficiency and product quality. UTILITY MODEL CONTENTS

[0004] One purpose of the utility model is to propose a kind of commutator structure of preventing pole piece loosening of micro direct current motor, and the utility model is to solve the problem that the general direct current brush motor rotor commutator on the market often does not have the structure of skeleton with rivet mark, which leads to insufficient fixing of pole piece, and it is easy to loosen in production and manufacturing process.

[0005] According to the utility model embodiments, the commutator structure for preventing the pole piece from loosening of the micro direct current motor comprises a motor shell, a stator is fixedly connected to the inner side surface of the motor shell, a front end bearing is installed at the inner front end of the motor shell, a rear end bearing is installed at the inner rear end of the motor shell, a shaft is rotatably connected to the inner middle part of the motor shell through the front end bearing and the rear end bearing, a rotor is fixedly installed on the surface of the shaft, a commutator structure is installed on the rear end surface of the shaft, the commutator structure comprises a plurality of pole piece structures, a spacer is arranged between the surface of the pole piece structure and the surface of the rotor, L-shaped grooves are formed in the surface of the pole piece structure and the surface of the spacer, rivet structures are clamped and connected in the L-shaped grooves, telescopic hooks are slidably connected to the side surface upper end of the rivet structures, second spring structures are arranged between the telescopic hooks and the inner wall of the rivet structures, recesses are formed in the other side surface lower end of the rivet structures, clamping blocks are slidably connected in the recesses, first spring structures are arranged between the side surface of the clamping blocks and the inner wall of the recesses.

[0006] Preferably, the L-shaped groove is internally clamped and connected with a dust cover at one end.

[0007] Preferably, the surface of the rotor is wound with a winding wire.

[0008] Preferably, the outer side surface of the commutator structure is fixedly connected with a coil hook.

[0009] Preferably, the plurality of pole piece structures are uniformly provided with intervals.

[0010] Preferably, the output end of the shaft is drivingly connected with a gear head.

[0011] Preferably, the rear end of the motor shell is installed with a rear end cover.

[0012] Preferably, the surface of the rear end cover is clamped and connected with a brush.

[0013] The utility model has the advantages that:

[0014] The utility model discloses a rivet structure is inserted to the inside of L type groove through setting, realizes the fixed position of pole piece structure use through rivet structure, can fix the end of winding wire on the flexible hook and carry out the wire hanging when winding wire is wound, and the convenience of winding processing is improved, the stability of pole piece fixation and winding wire hanging convenience are improved, winding wire breakage is effectively prevented, production efficiency is improved and the defective rate is reduced, effectively avoid the general direct current brush motor commutator of current market often not being equipped with the structure of framework with rivet, leading to its pole piece fixation deficiency, and the problem of easy loosening in the production manufacturing process is avoided,

[0015] The utility model discloses a rivet structure is inserted to the inside of L type groove through setting, realizes the fixed position of pole piece structure use through rivet structure, can fix the end of winding wire on the flexible hook and carry out the wire hanging when winding wire is wound, and the convenience of winding processing is improved, the stability of pole piece fixation and winding wire hanging convenience are improved, winding wire breakage is effectively prevented, production efficiency is improved and the defective rate is reduced, effectively avoid the general direct current brush motor commutator of current market often not being equipped with the structure of framework with rivet, leading to its pole piece fixation deficiency, and the problem of easy loosening in the production manufacturing process is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the present utility model, and constitute a part of the specification, and are used together with embodiments of the present utility model to explain the present utility model, and do not constitute the limitation to the present utility model. In the drawings:

[0017] Figure 1 The utility model discloses a kind of commutator structures for preventing pole piece loosening of micro direct current motor, as shown in the structure diagram of the appearance of motor shell in the figure;

[0018] Figure 2 The utility model discloses a kind of commutator structures for preventing pole piece loosening of micro direct current motor, as shown in the structure diagram of the appearance of motor shell in the figure;

[0019] Figure 3 The utility model discloses a kind of commutator structures for preventing pole piece loosening of micro direct current motor, as shown in the structure diagram of the appearance of motor shell in the figure;

[0020] Figure 4 The utility model discloses a kind of commutator structures for preventing pole piece loosening of micro direct current motor, as shown in the structure diagram of the appearance of motor shell in the figure;

[0021] Figure 5 The utility model provides a kind of commutator structure of preventing pole piece loosening of micro DC motor Figure 4 Enlarged view at A in the figure

[0022] In the figure: 1, motor housing;2, output end;3, gear head;4, rear end cover;5, stator;6, rotor;7, winding wire;8, front end bearing;9, rear end bearing;10, shaft;11, brush;12, commutator structure;13, pole piece structure;14, coil hook;15, L-shaped slot;16, rivet mark structure;17, recess;18, clamping block;19, first spring structure;20, dust cover;21, telescopic hook;22, second spring structure;23, spacer. DETAILED DESCRIPTION

[0023] The utility model will be further explained in detail in connection with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic manner, so it only shows the structure related to the utility model.

[0024] Reference Figures 1-5 A kind of commutator structure 12 of preventing pole piece loosening of micro DC motor, including the inner side surface of motor housing 1 is fixedly connected with stator 5, the inside front end of motor housing 1 is installed with front end bearing 8, the inside rear end of motor housing 1 is installed with rear end bearing 9, the inside middle part of motor housing 1 is rotatably connected with shaft 10 by front end bearing 8 and rear end bearing 9, the surface of shaft 10 is fixedly installed with rotor 6, the rear end surface of shaft 10 is installed with commutator structure 12, commutator structure 12 includes several pole piece structures 13, spacer 23 is arranged between the surface of pole piece structure 13 and rotor 6, L-shaped slot 15 is set up on the surface of pole piece structure 13 and the surface of spacer 23, rivet mark structure 16 is clamped and connected in the inside of L-shaped slot 15, telescopic hook 21 is slidably connected on the side surface upper end of rivet mark structure 16, second spring structure 22 is arranged between telescopic hook 21 and the inner wall of rivet mark structure 16, recess 17 is set up on the other side surface lower end of rivet mark structure 16, clamping block 18 is slidably connected in the inside of recess 17, first spring structure 19 is arranged between the side surface of clamping block 18 and the inner wall of recess 17, pole piece structure 13 is fixed by rivet mark structure 16, prevent its loosening, ensure that winding hangs line accurately and firmly, reduce the broken wire phenomenon in production process, improve production efficiency, reduce the rate of rejection and cost.

[0025] In the embodiment 1, the dust cover 20 is connected to one end of the L-shaped slot 15, which effectively prevents dust and impurities from entering the L-shaped slot 15 and causing the rivet structure 16 inside the L-shaped slot 15 to be blocked and unable to be disassembled. The rotor 6 has winding wires 7 wound thereon, and the commutator structure 12 has coil hooks 14 fixedly connected to the outer surface thereof. The plurality of pole piece structures 13 are evenly provided with intervals therebetween.

[0026] In the embodiment 2, the output end 2 of the shaft 10 is drivingly connected with a gear head 3, and the rear end of the motor housing 1 is provided with a rear end cover 4, and the surface of the rear end cover 4 is engagedly connected with a brush 11.

[0027] In use, the pole piece structure 13 is first installed on the surface of the shaft 10 through the spacer 23 to form the commutator structure 12, and then the rivet structure 16 is inserted into the L-shaped slot 15 to fix the position of the pole piece. The winding wire 7 is fixed at the end of the telescopic hook 21 for wire hanging, which facilitates winding processing. When the commutator needs to be maintained and repaired, the dust cover 20 is opened, a thin rod is inserted into the L-shaped slot 15, the clamping block 18 is extruded into the groove 17, the first spring structure 19 is in the extruded state, and then the rivet structure 16 is pulled out. After the maintenance is completed, the rivet structure 16 is reinserted, the clamping block 18 is retracted under the extrusion of the inner wall of the L-shaped slot 15, and after the rivet structure 16 is completely inserted, the clamping block 18 is popped out by the reset elastic force of the first spring structure 19 and clamped in the transverse structure of the L-shaped slot 15, thereby completing the fixation. This process simplifies the disassembly and maintenance of the commutator, improves the maintenance efficiency and convenience, ensures the stability of the structure, and reduces the failure rate after maintenance.

[0028] The above description is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A commutator structure for preventing pole pieces from loosening in a micro DC motor, characterized in that: The utility model relates to a motor shell (1), the inner side surface of motor shell (1) is fixedly connected with stator (5), the inside front end of motor shell (1) is installed with front end bearing (8), the inside rear end of motor shell (1) is installed with rear end bearing (9), the inside middle part of motor shell (1) is rotatably connected with axle (10) through front end bearing (8) and rear end bearing (9), the surface of axle (10) is fixedly installed with rotor (6), the rear end surface of axle (10) is installed with commutator structure (12), the commutator structure (12) includes a plurality of pole piece structure (13), the surface between pole piece structure (13) and rotor (6) is provided with spacer (23), the surface of pole piece structure (13) and the surface of spacer (23) are seted up with L type slot (15), the inside of L type slot (15) is clamped and is connected with rivet mark structure (16), the side surface upper end of rivet mark structure (16) is slidably connected with telescopic hook (21), the second spring structure (22) is seted up between telescopic hook (21) and the inner wall of rivet mark structure (16), the recess (17) is seted up in the other side surface lower end of rivet mark structure (16), the inside of recess (17) is slidably connected with clamping block (18), the first spring structure (19) is seted up between the side surface of clamping block (18) and the inner wall of recess (17).

2. The commutator structure for preventing the commutator segment from being loose in a micro DC motor according to claim 1, wherein The inside one end of L type slot (15) is clamped and connected with dust cover (20).

3. The commutator structure for preventing the commutator segment from being loose in a micro DC motor according to claim 1, wherein The surface of rotor (6) is wound with winding wire (7).

4. The commutator structure for preventing the commutator segment from being loosened in a micro DC motor according to claim 1, wherein The outer side surface of commutator structure (12) is fixedly connected with coil hook (14).

5. The commutator structure for preventing the commutator segment from being loosened in a micro DC motor according to claim 1, wherein A plurality of pole piece structure (13) are evenly provided with interval.

6. The commutator structure for preventing the commutator segment from being loose in a micro DC motor according to claim 1, wherein The output end (2) of axle (10) is drivingly connected with gear head (3).

7. The commutator structure for preventing the commutator segment from being loose in a micro DC motor according to claim 1, wherein The rear end of motor shell (1) is installed with rear end cover (4).

8. The commutator structure for preventing the commutator segment from being loosened in a micro DC motor according to claim 7, wherein The surface of rear end cover (4) is clamped and connected with brush (11).

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