High-stability commutator

Abstract

A high-stability commutator comprises a commutator base body, a plurality of commutator segments are uniformly arranged along the periphery of the commutator base body, and each commutator segment comprises an installation part used for being connected with the commutator base body and a hook pin used for winding and fixing an enameled wire on the commutator. Two embedded protruding strips used for being connected with the commutator base body are arranged on the inner side of the installation part in the direction of a rotating shaft of the commutator base body, the two embedded protruding strips are oppositely arranged on the two sides of the installation part, and the two sides of the commutator segments and the commutator base body are firmly fixed together. According to the high-stability commutator of the utility model, the commutator segments are connected with the commutator base body through the swallow-tail-shaped bumps on the two sides, so that the possibility of deformation and flanging of the side edges of the commutator segments is reduced, and the reliability of the performance of the commutator is improved; and the connection angles between the commutator segments and the commutator base body are changed, so that the connection bumps of the commutator segments are directly clamped in the commutator base body, a traditional mode of fixing by using adhesive force is replaced, and the connection reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of commutators, in particular to a high-stability commutator. Background Art

[0002] The commutator typically consists of multiple copper or carbon segments separated by mica or other insulating material and fixed to a cylindrical or disc-shaped commutator base. When the motor's armature rotates, the brushes contact the commutator segments, converting the alternating current in the armature winding to direct current between the brushes, or vice versa.

[0003] The commutator segment is generally provided with a protruding block insert in the middle of the inner side, and is connected to the commutator base through the protruding block insert. However, in actual operation, it is found that the side of the commutator segment is prone to deformation and warping during long-term operation, thereby accelerating the wear of the brush, greatly reducing the life of the brush, and also having a great impact on the stability of the current.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a high-stability commutator to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be assumed that the above contents are well known to those skilled in the art simply because they are explained in the background technology of the present invention. Utility Model Content

[0006] In order to overcome the above-mentioned deficiencies in the prior art, the present invention aims to disclose a highly stable commutator for solving the problem that the sides of the commutator segments are easily deformed and warped.

[0007] The utility model discloses a high-stability commutator, comprising a commutator base body, wherein a plurality of commutator segments are evenly arranged along the outer circumference of the commutator base body, the commutator segments comprising a mounting portion for connecting to the commutator base body and a hook foot for winding an enameled wire and fixing it on the commutator, two embedded convex strips for connecting to the commutator base body are arranged on the inner side of the mounting portion along the direction of the commutator base body rotation axis, the two embedded convex strips are arranged opposite to each other on both sides of the mounting portion, and the two sides of the commutator segments are firmly fixed to the commutator base body, thereby avoiding deformation and warping of the side edges of the commutator segments during use.

[0008] A preferred technical solution is that the embedded convex strip includes at least two sections of convex blocks arranged at intervals, thereby increasing the connection strength between the embedded convex strip and the commutator base.

[0009] The preferred technical solution is that the protrusion is a dovetail-shaped structure, so that the protrusion is directly snapped into the commutator base, thereby increasing the connection strength and preventing the protrusion from falling off the commutator base.

[0010] Preferred technical solution: The protrusion and the mounting portion are integrally formed to increase the stability of the commutator segment and avoid deformation of the commutator segment caused by breakage at the connection.

[0011] Optimal technical solution: The outer side of the mounting portion is an arc surface, and the axis of the outer arc surface is consistent with the axis of the commutator base, which improves the fit between the commutator segment and the commutator base and reduces the amount of processing on the outer side of the commutator segment after installation.

[0012] A preferred technical solution is that the included angle between the embedded convex strip and the outer arc surface is less than 90°, so that the embedded convex strip is embedded into the commutator base at an angle, thereby increasing the connection strength.

[0013] Preferred technical solution: the commutator segments are copper segments.

[0014] Preferred technical solution: The hardness of the copper sheet is between HV105 and HV115, so that the commutator segments in the commutator have sufficient hardness even at extreme temperatures to avoid deformation that affects the commutator performance.

[0015] Preferred technical solution: The commutator substrate is a phenolic resin molding compound, which has good electrical insulation properties, high temperature resistance, flame retardancy, mechanical properties and water resistance, and can improve the stability of the commutator in extreme environments.

[0016] Due to the application of the above technical solution, the high-stability commutator of the utility model has the following beneficial effects:

[0017] (1) The commutator segments are connected to the commutator base through dovetail-shaped protrusions on both sides, which reduces the possibility of deformation and flanging of the commutator segments and improves the reliability of the commutator performance;

[0018] (2) Changing the connection angle between the commutator segments and the commutator base allows the connecting protrusions of the commutator segments to be directly snapped into the commutator base, replacing the traditional method of fixing with adhesive force and improving the reliability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a high-stability commutator of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the cross section taken along AA;

[0021] Figure 3 This is the main view of a traditional commutator segment before installation on the commutator base;

[0022] Figure 4 This is a top view of a conventional commutator segment before being mounted on the commutator base;

[0023] Figure 5This is a side view of a conventional commutator segment before installation on the commutator base;

[0024] Figure 6 This is a front view of the commutator segment in the present invention before being installed on the commutator base;

[0025] Figure 7 This is a top view of the commutator segment in the present invention before being installed on the commutator base;

[0026] Figure 8 This is a side view of the commutator segment in the present invention before being installed on the commutator base.

[0027] In the above drawings, 1 is the commutator base; 2 is the commutator segment; 21 is the mounting portion; 22 is the hook foot; 23 is the embedded convex strip; 23a is the convex block; 3 is the embedded portion. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present utility model. In addition, terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0030] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] Example:

[0032] like Figure 3 、 Figure 4 and Figure 5As shown, the embedded portion 3 of the traditional commutator segment for connecting to the commutator base is set in the middle of the commutator segment. After the commutator segment and the commutator base are installed, the two sides of the commutator segment are fixed only by the adhesive force between the commutator segment and the commutator base. When the temperature is too high or it is operated for a long time, the commutator segment is easily separated from the commutator base and deformed, resulting in warping of the commutator segment, thereby accelerating the wear of the commutator brush.

[0033] like Figure 1 and Figure 2 As shown, in order to solve the above problems, the present invention discloses a high-stability commutator, comprising a commutator base 1, and a plurality of commutator segments 2 are evenly arranged along the outer circumference of the commutator base 1. The main components of the present invention are described in detail below:

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, the commutator base 1 is made of phenolic resin molding material. Phenolic resin molding material has excellent electrical insulation, high temperature resistance, wear resistance, and mechanical properties. During long-term operation of the commutator, it is not easily worn and its mechanical properties will not fail due to high temperatures, thus ensuring the stability of the commutator operation. It should be noted that the above structure is merely exemplary and not restrictive. In this embodiment, the commutator base 1 is made of phenolic resin molding material; however, in other embodiments, the commutator base 1 can also be made of other insulating and high-temperature resistant materials.

[0035] like Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 8 As shown, in this embodiment, the commutator segment 2 is a copper sheet with a hardness between HV105 and HV115, so that the commutator can still maintain a certain hardness at high temperatures, avoiding thermal deformation affecting the connection stability between the commutator segment 2 and the brush.

[0036] like Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 8 As shown, in this embodiment, the commutator segment 2 includes a mounting portion 21 and a hook foot 22, wherein the hook foot 22 is used for winding and fixing the enameled wire, and the mounting portion 21 is used to connect with the commutator base 1 and cooperate with the brush; the outer side of the mounting portion 21 is an arc surface, and the axis of the outer arc surface is consistent with the axis of the commutator base 1, which facilitates the positioning and fixation of the commutator segment 2 and the commutator base 1; two embedded ridges 23 are provided on the inner side of the mounting portion 21 along the rotation axis direction of the commutator base 1, and the two embedded ridges 23 are arranged opposite to each other on both sides of the mounting portion 21, thereby increasing the connection strength between the two sides of the commutator segment 2 and the commutator base 1, and avoiding the problem of deformation and warping of the commutator segment 2 during use.

[0037] like Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 8 As shown, in this embodiment, the included angle between the embedded protrusion 23 and the outer arc surface is less than 90°, so that the embedded protrusion 23 is fixed to the commutator base 1 and the connection strength is increased.

[0038] like Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 8 As shown, in this embodiment, the embedded protrusion 23 includes at least two sections of protrusions 23a arranged at intervals. The protrusion 23a is a dovetail-shaped structure. The protrusion 23a and the mounting portion 21 are integrally formed to increase the connection area between the embedded protrusion 23 and the commutator base 1. At the same time, the dovetail-shaped structure is used to clamp the commutator base 1 to further increase the connection stability between the commutator segment 2 and the commutator base 1.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by persons skilled in the art without departing from the spirit and technical concepts disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A high-stability commutator, comprising a commutator base (1), wherein the commutator base (1) is evenly provided with a plurality of commutator segments (2) along the outer periphery, characterized in that: The commutator segment (2) comprises a mounting portion (21) and a hook foot (22); two embedded convex strips (23) are provided on the inner side of the mounting portion (21) along the rotation axis direction of the commutator base (1); the two embedded convex strips (23) are arranged opposite to each other on both sides of the mounting portion (21).

2. A high-stability commutator according to claim 1, characterized in that: The embedded convex strip (23) comprises at least two sections of convex blocks (23a) arranged at intervals.

3. A high-stability commutator according to claim 2, characterized in that: The protrusion (23a) is a dovetail-shaped structure.

4. The high-stability commutator according to claim 3, characterized in that: The protrusion (23a) and the mounting portion (21) are integrally formed.

5. The high-stability commutator according to claim 1, characterized in that: The outer side of the mounting portion (21) is an arc surface, and the axis of the outer arc surface is consistent with the axis of the commutator base (1).

6. The high-stability commutator according to claim 5, characterized in that: The included angle between the embedded convex strip (23) and the outer curved surface is less than 90°.

7. The high-stability commutator according to claim 1, characterized in that: The commutator segment (2) is a copper segment.

8. The high-stability commutator according to claim 7, characterized in that: The hardness of the copper sheet is between HV105 and HV115.

9. The high-stability commutator according to claim 1, characterized in that: The commutator base (1) is a phenolic resin molding compound.

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