Multi-contact combined commutator

Abstract

The utility model provides a multi-contact combined commutator, comprising an insulating sleeve and commutator segments, the insulating sleeve is provided with a plurality of mounting grooves, the number of the mounting grooves is consistent with the number of the commutator segments, and the commutator segments are fixed in the mounting grooves; a mounting groove is formed in the commutator segment, two dovetail convex blocks are arranged in the mounting groove, dovetail grooves matched with the dovetail convex blocks are formed in the commutator, and when the commutator segment is mounted in the mounting groove, the dovetail convex blocks are clamped in the dovetail grooves; fixing rings are symmetrically arranged at the upper end and the lower end of the insulating sleeve, the fixing rings comprise the upper fixing ring and the lower fixing ring, dovetail protruding blocks arranged on the insulating sleeve are matched with dovetail grooves in commutator segments, the fixing ring structures are arranged, and the dovetail protruding blocks and the dovetail grooves provide a stable and reliable connection mode. The commutator segments can not loosen or fall off in the installation grooves, and the dual fixation of the fixing ring ensures that the commutator segments are installed stably and are not easy to loosen or fall off.

Description

Technical Field

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

[0002] A commutator, also known as a "commutator", is an important component on the armature of a DC motor and an AC commutator motor. The working principle of the commutator is mainly to convert the alternating electromotive force induced in the armature coil into a DC electromotive force when it is led out from the brush end through the commutation action of the commutator in cooperation with the brush. Specifically, when the coil passes through an electric current, it will rotate under the action of a permanent magnet through attraction and repulsion forces. When it rotates to a balance with the magnet, the contact piece on the commutator corresponding to the originally energized coil will separate from the brush, and the brush will be connected to the contact piece corresponding to the coil that generates the driving force. In this way, it repeats continuously, and the DC motor rotates;

[0003] The existing Chinese patent document CN200620108374.6 discloses a cylindrical carbon commutator, including commutator segments and molding compounds. The body of the commutator segment is parallel to the rotation axis of the commutator, and carbon sheets are installed on the outer surface of the body of the commutator segment. When the motor runs at high speed, the carbon brush directly contacts the carbon sheet of the carbon commutator, and the body of the commutator segment will not be worn. Therefore, the utility model has high wear resistance, is not easy to generate sparks during operation, has good and stable product technical performance, and extends the service life.

[0004] However, there are certain defects in the use of the above patent. Since the connection between the commutator segments and the molding sheets of the commutator is not tight, when the commutator operates under high load or for a long time, it will fall off due to excessive speed, resulting in the failure and damage of the device;

[0005] Therefore, a multi-contact combined commutator is proposed here to solve the above problems. Summary of the Utility Model

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a multi-contact combined commutator.

[0007] The utility model is realized by adopting the following technical solutions:

[0008] A multi-contact combined commutator includes an insulating sleeve and commutator segments. There are multiple commutator segments, which are evenly and equidistantly arranged along the center of the insulating sleeve. There is a gap between each commutator segment. The commutator segments are fixed on the outer peripheral wall of the insulating sleeve. The insulating sleeve is provided with multiple installation grooves, and the number of the installation grooves is consistent with the number of commutator segments. The commutator segments are fixed in the installation grooves;

[0009] There are two dovetail protrusions provided in the installation groove, and there are dovetail grooves adapted to the dovetail protrusions on the commutator. When the commutator segment is installed in the installation groove, the dovetail protrusions are clamped in the dovetail grooves;

[0010] At the upper and lower ends of the insulating sleeve, fixing rings are symmetrically provided. The fixing rings are respectively an upper fixing ring and a lower fixing ring, and the fixing rings are further used for fixing the commutator segment.

[0011] Fixing grooves are provided on the surfaces at the upper and lower ends of the insulating sleeve, and the upper fixing ring and the lower fixing ring are fixedly connected to the insulating sleeve through the fixing grooves;

[0012] Reinforcing grooves are symmetrically provided at the upper and lower ends of the commutator segment. Flanges are provided at the edges of the upper fixing ring and the lower fixing ring. When the upper fixing ring and the lower fixing ring are fixed to the insulating sleeve, the flanges of the upper fixing ring and the lower fixing ring are clamped in the reinforcing grooves on the commutator segment.

[0013] Clamping grooves are provided at the upper and lower ends of the commutator segment, and mica sheets are provided in the gaps between the commutator segments.

[0014] A cavity is provided inside the insulating sleeve, and the cavity is filled with insulating coolant.

[0015] A lining sleeve is provided inside the insulating sleeve, and the lining sleeve is sleeved inside the insulating sleeve.

[0016] The utility model has the following beneficial effects compared with the prior art:

[0017] 1. By the cooperation of the dovetail protrusions provided on the insulating sleeve and the dovetail grooves on the commutator segment, and by setting the fixing ring structure, the dovetail protrusions and the dovetail grooves provide a stable and reliable connection method to ensure that the commutator segment will not loosen or fall off in the installation groove, and the double fixation of the fixing ring ensures that the commutator segment is firmly installed and is not easy to loosen or fall off;

[0018] 2. By providing a cavity inside the insulating sleeve and filling the cavity with coolant, when the commutator works, the coolant absorbs the heat generated by the commutator through heat transfer and dissipates it into the external environment. This cooling method can effectively reduce the temperature of the commutator and prevent performance degradation or damage caused by overheating. Description of the Drawings

[0019] Figure 1 is a three-dimensional structure schematic diagram of the whole utility model;

[0020] Figure 2 is a front structure schematic diagram of the whole utility model;

[0021] Figure 3 is a top view structure schematic diagram of the whole utility model;

[0022] Figure 4 is the schematic cross-sectional structure view along the A-A direction in the present utility model; Figure 2 in the present utility model;

[0023] Figure 5 is the exploded three-dimensional structure view of the present utility model;

[0024] Figure 6 is the schematic structure view of the commutator of the present utility model;

[0025] Figure 7 is the present utility model Figure 6 the enlarged schematic view of the structure at position A in the present utility model;

[0026] In the figure: 1, commutator segment; 11, dovetail groove; 12, clamping groove; 13, reinforcing groove; 2, upper fixing ring; 3, inner lining sleeve; 4, lower fixing ring; 5, insulating sleeve; 51, cavity; 52, dovetail protrusion; 53, mounting groove; 54, fixing groove; 6, mica sheet. Specific embodiments

[0027] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, any combination can be formed among the following-described embodiments or technical features to form a new embodiment.

[0028] The present utility model will be further described below with reference to the accompanying drawings.

[0029] As Figures 1 to 7 shown, a multi-contact combined commutator includes an insulating sleeve 5 and commutator segments 1. A plurality of the commutator segments 1 are provided and are evenly and equidistantly arranged along the center of the insulating sleeve 5. The insulating sleeve 5 is the main structure of the entire commutator, which provides a basis for the installation of the commutator segments 1 and ensures the insulation of the electrical components inside the commutator. The insulating sleeve 5 is usually made of insulating materials, such as plastics or special ceramic materials, to prevent current leakage and short circuits;

[0030] A gap is left between each of the commutator segments 1. The provided gap ensures the smooth commutation of current and the heat dissipation requirements. Further, for insulation performance, mica sheets 6 are also provided in the gaps. The commutator segments are fixed on the outer peripheral wall of the insulating sleeve 5. A plurality of mounting grooves 53 are provided on the insulating sleeve 5. The number of the mounting grooves 53 is consistent with the number of the commutator segments 1. The commutator segments 1 are fixed in the mounting grooves 53;

[0031] Two dovetail protrusions 52 are provided in the mounting grooves 53. Dovetail grooves 11 adapted to the dovetail protrusions 52 are provided on the commutator. When the commutator segments 1 are installed in the mounting grooves 53, the dovetail protrusions 52 are clamped in the dovetail grooves 11 to form a firm locking structure, effectively preventing the loosening or falling off of the commutator segments 1 during rotation.

[0032] The upper and lower ends of the insulating sleeve 5 are symmetrically provided with fixing rings, which are an upper fixing ring 2 and a lower fixing ring 4. The fixing rings are further used to fix the commutator segment 1. The fixing rings not only enhance the overall structural strength of the commutator, but also further play the role of fixing the commutator segment 1.

[0033] The surfaces of the upper and lower ends of the insulating sleeve 5 are provided with fixing grooves 54, and the upper fixing ring 2 and the lower fixing ring 4 are fixedly connected to the insulating sleeve 5 through the fixing grooves 54;

[0034] The upper and lower ends of the commutator segment 1 are symmetrically provided with reinforcement grooves 13, and the edges of the upper fixing ring 2 and the lower fixing ring 4 are provided with folded edges. When the upper fixing ring 2 and the lower fixing ring 4 are fixed to the insulating sleeve 5, the folded edges of the upper fixing ring 2 and the lower fixing ring 4 are clamped in the reinforcement groove 13 on the commutator segment 1, and the fixing ring is fixedly connected to the insulating sleeve 5 through the fixing groove 54, and the folded edges at the edges are clamped in the reinforcement groove 13 on the commutator segment 1, forming a double fixing mechanism.

[0035] The upper and lower ends of the commutator segments 1 are provided with snap-fit grooves 12, and the gaps between the commutator segments 1 are provided with mica sheets 6. The mica sheets 6 are provided to provide electrical insulation and prevent the generation of arcs. The mica sheets 6 generally have good high-temperature resistance and electrical insulation properties, and can ensure the stable operation of the commutator in high-temperature and high-pressure environments.

[0036] The insulating sleeve 5 is provided with a cavity 51 inside, and the cavity 51 is filled with insulating coolant, which effectively removes the heat generated by the commutator during operation through circulation, thereby improving the heat dissipation efficiency and extending the service life of the commutator.

[0037] An inner bushing 3 is provided inside the insulating sleeve 5 , and the inner bushing 3 is sleeved inside the insulating sleeve 5 .

[0038] The working principle of the present invention is as follows: when the motor is started, the current passes through the motor winding and flows through the commutator segments 1. The commutator segments 1 are evenly and equidistantly arranged on the outer peripheral wall of the insulating sleeve 5. The mounting grooves 53 and the dovetail protrusions 52 / dovetail grooves 11 cooperate to ensure that the commutator segments 1 are stably fixed. The mica sheets 6 are placed in the gaps between the commutator segments 1 to provide electrical insulation, prevent the current from directly passing through the air gaps between the commutator segments 1, and ensure that the current flows along the predetermined path.

[0039] During the operation of the commutator, a certain amount of heat is generated due to the passage of current and mechanical friction. The cavity 51 inside the insulating sleeve 5 is filled with insulating coolant, which absorbs the heat generated by the commutator and dissipates it to the external environment through heat transfer.

[0040] The commutator keeps working to ensure that the motor can rotate in a predetermined direction and speed. The design of the dovetail bump 52 and the dovetail groove 11, as well as the fixed ring and the reinforcement groove 13, enhances the structural strength of the commutator and prevents loosening or falling off caused by vibration or impact.

[0041] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A multi-contact combined commutator, comprising an insulating sleeve (5) and commutator segments (1). A plurality of the commutator segments (1) are provided and are evenly and equidistantly arranged along the center of the insulating sleeve (5). A gap is left between each of the commutator segments (1). The commutator segments are fixed on the outer peripheral wall of the insulating sleeve (5), and it is characterized in that: The upper part of the insulating sleeve (5) is provided with a plurality of mounting grooves (53), the number of the mounting grooves (53) is consistent with the number of commutator segments (1), and the commutator segments (1) are fixed in the mounting grooves (53); Two dovetail protrusions (52) are arranged in the mounting groove (53), and dovetail grooves (11) adapted to the dovetail protrusions (52) are arranged on the commutator. When the commutator segments (1) are installed in the mounting grooves (53), the dovetail protrusions (52) are clamped in the dovetail grooves (11); Fixed rings are symmetrically arranged at the upper and lower ends of the insulating sleeve (5), the fixed rings are respectively an upper fixed ring (2) and a lower fixed ring (4), and the fixed rings are further used for fixing the commutator segments (1).

2. The multi-contact combined commutator according to claim 1, characterized in that: Fixed grooves (54) are arranged on the surfaces of the upper and lower ends of the insulating sleeve (5), and the upper fixed ring (2) and the lower fixed ring (4) are fixedly connected to the insulating sleeve (5) through the fixed grooves (54); Reinforcing grooves (13) are symmetrically arranged at the upper and lower ends of the commutator segments (1), and flanges are arranged at the edges of the upper fixed ring (2) and the lower fixed ring (4). When the upper fixed ring (2) and the lower fixed ring (4) are fixed to the insulating sleeve (5), the flanges of the upper fixed ring (2) and the lower fixed ring (4) are clamped in the reinforcing grooves (13) on the commutator segments (1).

3. The multi-contact combined commutator according to claim 2, wherein: Clamping grooves (12) are arranged at the upper and lower ends of the commutator segments (1), and mica sheets (6) are arranged in the gaps between the commutator segments (1).

4. A multi-contact combined commutator according to claim 3, characterized in that: A cavity (51) is arranged inside the insulating sleeve (5), and the cavity (51) is filled with insulating coolant.

5. The multi-contact combined commutator according to claim 4, characterized in that: A lining sleeve (3) is arranged inside the insulating sleeve (5), and the lining sleeve (3) is sleeved inside the insulating sleeve (5).

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