Special anti-interference direct current motor for currency counting machine

Abstract

The utility model relates to a special anti-interference direct current motor for a currency counter. The special anti-interference direct current motor comprises a motor shell, a permanent magnet, a rotor, a rear end cover, an electric brush, a front end cover and a shielding shell, the permanent magnet is arranged in the motor shell, the front end of the rotor penetrates out of the front end of the motor shell and is rotationally connected with the motor shell, the rear end cover is connected with the rear end of the motor shell, the rear end of the rotor penetrates out of the rear end cover and is rotationally connected with the rear end cover, and the electric brush is arranged in the rear end cover and is rotationally connected with the rotor. The electric brush extends outwards from the rear end cover to form an electrode plate for connecting a power supply, the front end cover is arranged at the front end of the motor shell and is provided with a through hole for the front end of the rotor to pass through, and a connecting part is arranged on one surface, facing the rear end cover, of the front end cover and is used for being connected with a shielding shell. According to the motor, the connecting part is arranged on the front end cover, so that a plurality of shielding shells can be connected, the shielding shells are made of silicon steel sheets, and different numbers of shielding shells can be selected to be assembled according to the sensitivity degrees of magnetic heads of different currency counters.

Description

Technical Field

[0001] The utility model relates to the field of motors, and more specifically, to an anti-interference DC motor specially used for a banknote counting machine. Background Art

[0002] The motor as the power part of the money counter generally uses an external AC power supply, and then converts the AC power into DC power through the AC-DC device inside the motor. The magnetic head on the money counter is easily disturbed by the magnetic field of the motor when working, thereby affecting the operation of the money counter. Therefore, how to optimize the motor to avoid its influence on the magnetic head of the money counter is the technical problem to be solved by this application. Utility Model Content

[0003] In view of the shortcomings of the prior art, an anti-interference DC motor dedicated to a banknote counter is proposed, which can be equipped with a shielding shell to improve the shielding ability of the motor and avoid affecting the magnetic head of the banknote counter.

[0004] An anti-interference DC motor for a banknote counting machine comprises a motor housing, a permanent magnet, a rotor, a rear end cover, a brush, a front end cover and a shielding shell;

[0005] The permanent magnet is arranged in the motor housing, the front end of the rotor passes through the front end of the motor housing and is rotatably connected to the motor housing, the rear end cover is connected to the rear end of the motor housing, the rear end of the rotor passes through the rear end cover and is rotatably connected to the rear end cover, the brush is arranged in the rear end cover and is rotatably connected to the rotor, the brush extends electrode sheets outward from the rear end cover for connecting to a power source, the front end cover is arranged at the front end of the motor housing, and is provided with a through hole for the front end of the rotor to pass through, and a connecting portion is provided on a side of the front end cover facing the rear end cover, and the connecting portion is used to connect to the shielding shell.

[0006] To sum up, the above technical solution has the following beneficial effects: two brushes are provided, which are respectively connected to the positive and negative poles of the power supply. After the rotor is energized, it cooperates with the permanent magnet to rotate in the motor housing. The motor of the present application is provided with a connecting part on the front end cover, so that multiple shielding shells can be connected. The shielding shells are made of silicon steel sheets. Different numbers of shielding shells can be selected for assembly according to the sensitivity of the magnetic heads of different banknote counters. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A schematic diagram of a motor housing of an anti-interference DC motor for a banknote counting machine;

[0008] Figure 2 A schematic diagram of a shielding shell for an anti-interference DC motor used in a banknote counting machine;

[0009] Figure 3 The figure is a schematic cross-sectional diagram of a shielding shell of an anti-interference DC motor specially used in a banknote counting machine.

[0010] Figure numerals: 10, motor housing; 20, permanent magnet; 30, rotor; 40, rear end cover; 50, brush; 60, front end cover; 61, connecting part; 70, shielding shell; 71, wire hole. DETAILED DESCRIPTION

[0011] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0012] like Figure 1-3 As shown, an anti-interference DC motor for a banknote counter includes a motor housing 10, a permanent magnet 20, a rotor 30, a rear end cover 40, a brush 50, a front end cover 60 and a shielding shell 70; the permanent magnet 20 is arranged in the motor housing 10, the front end of the rotor 30 passes through the front end of the motor housing 10 and is rotatably connected to the motor housing 10, the rear end cover 40 is connected to the rear end of the motor housing 10, the rear end of the rotor 30 passes through the rear end cover 40 and is rotatably connected to the rear end cover 40, the brush 50 is arranged in the rear end cover 40 and is rotatably connected to the rotor 30, the brush 50 extends an electrode sheet outward from the rear end cover 40 for connecting to a power supply, the front end cover 60 is arranged at the front end of the motor housing 10, and is provided with a through hole for the front end of the rotor 30 to pass through, and a connecting portion 61 is provided on a side of the front end cover 60 facing the rear end cover 40, and the connecting portion 61 is used to connect to the shielding shell 70. Two brushes 50 are provided, which are respectively connected to the positive and negative poles of the power supply. After the rotor 30 is energized, it cooperates with the permanent magnet 20 to rotate in the motor housing 10. The motor of the present application is provided with a connecting portion 61 on the front end cover 60, so that multiple shielding shells 70 can be connected. The shielding shell 70 is made of silicon steel sheet. Different numbers of shielding shells 70 can be selected for assembly according to the sensitivity of the magnetic head of different banknote counters.

[0013] A varistor is also included, which is arranged at the rear end of the rotor 30. The varistor is a ring-shaped varistor for motors, which is used to prevent sparks from rotating between the rotor 30 and the brush 50, so as to reduce the interference of the motor on the magnetic head of the banknote counter.

[0014] A capacitor is also included, one end of the capacitor is connected to the brush 50, and the other end is connected to the motor housing 10. The positive and negative poles of the motor are each connected to a brush 50, and both brushes 50 are connected to the motor housing 10 through the capacitor. The capacitor is preferably a 104 capacitor. The capacitor is connected to the motor housing 10 and the brush 50, which can remove static electricity and shield current to reduce the interference of the motor on the magnetic head of the banknote counter.

[0015] The shielding shell 70 is provided with a wire hole 71 through which a power supply wire passes. The wire hole 71 is used for the electrode sheet to be connected with wires and a power source.

[0016] Embodiment 1: The connecting portion 61 is annular, an inner ring of the connecting portion 61 is provided with an internal thread, and an outer side of the shielding shell 70 is provided with an external thread for connecting with the connecting portion 61 .

[0017] Embodiment 2: The connecting portion 61 is annular, an outer ring of the connecting portion 61 is provided with an external thread, and an inner side of the shielding shell 70 is provided with an internal thread for connecting with the connecting portion 61 .

[0018] Embodiment 3: The connecting portion 61 is annular, an outer ring of the connecting portion 61 is provided with an external thread, an inner ring of the connecting portion 61 is provided with an internal thread, two shielding shells 70 are provided, an outer side of one shielding shell 70 is provided with an external thread for connecting to the internal thread of the connecting portion 61, and an inner side of the other shielding shell 70 is provided with an internal thread for connecting to the external thread of the connecting portion 61.

[0019] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A special anti-interference DC motor for a banknote counting machine, characterized in that: It comprises a motor housing (10), a permanent magnet (20), a rotor (30), a rear end cover (40), a brush (50), a front end cover (60) and a shielding shell (70); The permanent magnet (20) is arranged in the motor housing (10), the front end of the rotor (30) passes through the front end of the motor housing (10) and is rotatably connected to the motor housing (10), the rear end cover (40) is connected to the rear end of the motor housing (10), the rear end of the rotor (30) passes through the rear end cover (40) and is rotatably connected to the rear end cover (40), the brush (50) is arranged in the rear end cover (40) and is rotatably connected to the rotor (30), the brush (50) extends outward from the rear end cover (40) to form an electrode sheet for connecting to a power source, the front end cover (60) is arranged at the front end of the motor housing (10), and is provided with a through hole for the front end of the rotor (30) to pass through, and a connecting portion (61) is provided on a side of the front end cover (60) facing the rear end cover (40), and the connecting portion (61) is used to connect to a shielding shell (70).

2. The anti-interference DC motor for a banknote counter according to claim 1 is characterized in that: A varistor is also included, and the varistor is arranged at the rear end of the rotor (30).

3. The anti-interference DC motor for a banknote counter according to claim 2 is characterized in that: It also includes a capacitor, one end of which is connected to the brush (50) and the other end of which is connected to the motor housing (10).

4. The anti-interference DC motor for a banknote counter according to claim 1, characterized in that: The connecting portion (61) is annular, an inner ring of the connecting portion (61) is provided with an internal thread, and an outer side of the shielding shell (70) is provided with an external thread for connecting with the connecting portion (61).

5. The anti-interference DC motor for a banknote counter according to claim 1, characterized in that: The connecting portion (61) is annular, an outer ring of the connecting portion (61) is provided with an external thread, and the inner side of the shielding shell (70) is provided with an internal thread for connecting with the connecting portion (61).

6. The anti-interference DC motor for a banknote counter according to claim 1, characterized in that: The connecting portion (61) is annular, an outer ring of the connecting portion (61) is provided with an external thread, and an inner ring of the connecting portion (61) is provided with an internal thread. Two shielding shells (70) are provided, one of the shielding shells (70) has an internal thread provided on its inner side for connection with the external thread of the connecting portion (61), and the other shielding shell (70) has an external thread provided on its outer side for connection with the internal thread of the connecting portion (61).

7. The anti-interference DC motor for a banknote counter according to any one of claims 1 to 6, characterized in that: The shielding shell (70) is provided with a wire hole (71) through which a power supply wire passes.

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