Low-noise commutator

Abstract

The low-noise commutator comprises a sleeve, an inner cylinder is arranged on the inner side of the sleeve, partition plates are arranged in the inner cylinder, sound absorption cotton is arranged between the partition plates, the bottom of the inner cylinder is fixedly connected with the sleeve, a sealing cover plate is arranged at the top of the inner cylinder, one end of the sleeve is provided with an internal thread, and the other end of the sleeve is provided with an external thread. The closed cover plate is in threaded connection with the sleeve, a fixed bulge is arranged on one surface, far away from the sleeve, of the closed cover plate, and a commutator segment is arranged on the outer surface of the sleeve; the commutator sleeve has the advantages that the interior of the commutator sleeve is divided into two layers, the inner cylinder is arranged, the sound-absorbing cotton is installed in the inner cylinder to absorb sound on the inner wall, when the commutator makes contact with a motor shaft, generated noise is conducted into the inner cylinder through metal to be absorbed through the sound-absorbing cotton, and therefore the commutator is lowered, meanwhile, installation and detachment are convenient, and the cost is low. And the filling of the sound-absorbing cotton or other sound-absorbing materials can be replaced by closing the cover plate.

Description

Technical Field

[0001] The utility model relates to the field of commutator manufacturing, and specifically relates to a low-noise commutator. Background Technique

[0002] A commutator is an electrical device used in a motor or a generator. In a motor, it mainly plays the role of commuting current, making the current direction change periodically in the rotor winding, so as to generate continuous torque. In a generator, the commutator converts the generated alternating current into direct current for output. The basic structure of a commutator includes a cylindrical component made of a conductive material (such as copper), which is divided into several mutually insulated sector-shaped pieces and installed on the rotor of the motor or generator. The brushes (usually carbon brushes) are in contact with these sector-shaped pieces, and the commutation of current is realized through the sliding contact between the brushes and the commutator.

[0003] The commutator is a device used to change the current direction in a motor, usually composed of brushes and commutator segments. When the motor is running, the friction between the brushes and the commutator segments will generate electrical noise and mechanical noise. At the same time, due to the change of the electromagnetic field, electromagnetic noise will also be generated. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] The technical problem to be solved by the utility model is that when the motor is running, the friction between the brushes and the commutator segments will generate electrical noise and mechanical noise, and at the same time, electromagnetic noise will also be generated due to the change of the electromagnetic field.

[0006] (II) Technical Solutions

[0007] To solve the above problems, the utility model provides the following technical solutions:

[0008] A low-noise commutator includes a sleeve. An inner cylinder is provided inside the sleeve. A partition is provided in the inner cylinder. Sound-absorbing cotton is provided between the partitions. The bottom of the inner cylinder is fixedly connected to the sleeve. A closed cover plate is provided at the top of the inner cylinder. One end of the sleeve is provided with an internal thread. The closed cover plate is threadedly connected to the sleeve. A fixing protrusion is provided on the side of the closed cover plate away from the sleeve. Commutator segments are provided on the outer surface of the sleeve.

[0009] Furthermore, the inner cylinder is made of a metal material, the inner cylinder is cylindrical, a connecting piece is provided at the bottom of the inner cylinder, and the connecting piece and the sleeve are integrated.

[0010] Furthermore, the partition is made of a plastic material, and the partition is arranged circumferentially along the outer wall of the inner cylinder.

[0011] Furthermore, a plurality of sound-absorbing holes are provided on the sound-absorbing cotton.

[0012] Further, an external thread is provided on the outer side of the closing cover plate, and the closing cover plate is connected to the sleeve through the external thread.

[0013] (III) Beneficial effects

[0014] The beneficial effects of the present utility model are as follows:

[0015] The inner part of the commutator sleeve is divided into two layers. An inner cylinder is provided and sound-absorbing cotton is installed therein for inner wall sound absorption. When the commutator contacts the motor shaft, the generated noise is conducted through the metal to the inner cylinder and absorbed by the sound-absorbing cotton, thereby reducing the noise of the commutator. At the same time, it is convenient to install and remove, and the filling of the sound-absorbing cotton or other sound-absorbing materials can be replaced through the closing cover plate. Description of the drawings

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 The top view of the present utility model;

[0018] Figure 3 is a schematic structural diagram of another perspective of the present utility model;

[0019] Markings in the figure: 1 - sleeve, 2 - inner cylinder, 3 - sound-absorbing cotton, 4 - closing cover plate, 5 - commutator segment, 1a - internal thread, 2a - partition plate, 2b - connecting piece, 4a - fixing protrusion, 4b - external thread. Specific implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the 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 the 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.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] Please refer to Figures 1-3A low-noise commutator as shown includes a sleeve 1. An inner cylinder 2 is provided inside the sleeve 1. A partition 2a is provided in the inner cylinder 2. Sound-absorbing cotton 3 is provided between the partitions 2a. The bottom of the inner cylinder 2 is fixedly connected to the sleeve 1. A closed cover plate 4 is provided at the top of the inner cylinder 2. An internal thread 1a is provided at one end of the sleeve 1. The closed cover plate 4 is threadedly connected to the sleeve 1. A fixing protrusion 4a is provided on the side of the closed cover plate 4 away from the sleeve 1. Commutator segments 5 are provided on the outer surface of the sleeve 1.

[0023] The inner cylinder 2 is made of metal. The inner cylinder 2 is cylindrical. A connecting piece 2b is provided at the bottom of the inner cylinder 2. The connecting piece 2b and the sleeve 1 are integrated. The inner cylinder 2 is fixedly connected to the sleeve 1 through the connecting piece 2b at the bottom. The connecting piece 2b is annular and integrated with the sleeve 1. And a cavity is formed between the inner cylinder 2 and the sleeve 1 through the connecting piece 2b to place the partition 2a and the sound-absorbing cotton 3, and can be closed through the closed cover plate 4.

[0024] The partition 2a is made of plastic. The partition 2a is arranged along the circumference of the outer wall of the inner cylinder 2. The partition 2a is made of plastic to reduce weight and divide the cavity between the inner cylinder 2 and the sleeve 1 into uniform areas. Sound-absorbing cotton 3 is inserted into the separated areas to absorb the generated noise.

[0025] A number of sound-absorbing holes are provided on the sound-absorbing cotton 3. The sound-absorbing cotton is a sound-absorbing material, which can be traditional artificial inorganic fiber cotton, or a metal sound-absorbing plate or a foam material.

[0026] An external thread 4b is provided on the outer side of the closed cover plate 4. The closed cover plate 4 is connected to the sleeve 1 through the external thread 4b. The closed cover plate 4 can be twisted through the fixing protrusion 4a on the surface to threadedly connect the closed cover plate 4 to the sleeve 1 by rotation for placing the sound-absorbing cotton 3 or replacing it. After placing, tightening the closed cover plate 4 can close it and put it into use.

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0028] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-noise commutator, characterized in that: It includes a sleeve (1), an inner cylinder (2) is provided inside the sleeve (1), a partition plate (2a) is provided in the inner cylinder (2), a sound-absorbing cotton (3) is provided between the partition plates (2a), the bottom of the inner cylinder (2) is fixedly connected to the sleeve (1), a closed cover plate (4) is provided at the top of the inner cylinder (2), an internal thread (1a) is provided at one end of the sleeve (1), the closed cover plate (4) is threadedly connected to the sleeve (1), a fixing protrusion (4a) is provided on the side of the closed cover plate (4) away from the sleeve (1), and a commutator (5) is provided on the outer surface of the sleeve (1).

2. The low-noise commutator according to claim 1, wherein: The inner cylinder (2) is made of metal, the inner cylinder (2) is cylindrical, a connecting piece (2b) is provided at the bottom of the inner cylinder (2), and the connecting piece (2b) is integrated with the sleeve (1).

3. The low-noise commutator according to claim 1, characterized in that: The partition plate (2a) is made of plastic and is arranged circumferentially along the outer wall of the inner cylinder (2).

4. A low-noise commutator according to claim 1, characterized in that: A number of sound-absorbing holes are provided on the sound-absorbing cotton (3).

5. The low-noise commutator according to claim 1, wherein: An external thread (4b) is provided on the outer side of the closed cover plate (4), and the closed cover plate (4) is connected to the sleeve (1) through the external thread (4b).

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