Wear-resistant high-speed commutator

Abstract

The utility model discloses a wear-resistant high-speed commutator, which belongs to the technical field of commutators, and solves the problems that the conventional device only depends on the contact between the outer surface of a commutator body and air to dissipate heat, the heat dissipation effect is poor, the commutator body is easily damaged due to overheating, and the wear resistance is reduced. Commutator segments distributed in an annular array mode are fixedly installed on the outer surface of the commutator body, a dust discharging assembly is arranged on the front side of the commutator body, annular grooves are symmetrically formed in the front end face and the rear end face of the commutator body, and heat dissipation grooves are formed in the bottom faces of the annular grooves in a penetrating mode. The insulating heat dissipation assembly is arranged in the commutator body, the ventilation rate of air around the commutator body and the insulating heat dissipation assembly is increased through the dust discharging assembly, and heat in the commutator body is conducted to the insulating sleeve and the heat dissipation plate in sequence and dissipated to the air through the insulating sleeve and the heat dissipation plate. And the service life and wear resistance of the commutator body can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a commutator technical field, concretely is a kind of wear-resistant high-speed commutator. BACKGROUND

[0002] Commutator is installed on the rotor of motor, and is directly connected with armature winding, so it will rotate synchronously with motor rotor, and its rotating power comes from mechanical transmission of motor rotating shaft, and the commutator segment keeps sliding contact with stationary brush during rotation, and the periodic switching of current direction is realized through this dynamic contact.

[0003] Through retrieval, the application book with patent application number 202222238439.0 discloses a durable high-speed wear-resistant commutator, which comprises a commutator body, a dust removal device is arranged at one end of the commutator body, the dust removal device comprises a connecting seat, an assembly sleeve, a suction fan blade and an end rotating block, the end rotating block is movably installed in the connecting seat, the assembly sleeve is fixedly installed on one end surface of the end rotating block, the suction fan blade is arranged on the surface of the assembly sleeve, and the commutator copper sheet is fixedly installed outside the commutator body.

[0004] Although the durable high-speed wear-resistant commutator can clean the carbon powder generated by the friction between the annular segment and the carbon brush through the high-speed rotation of the suction fan blade in the dust removal device, which is conducive to reducing the wear degree of the surface of the commutator segment, the durable high-speed wear-resistant commutator only relies on the outer surface of the commutator body to contact with air for heat dissipation, and the heat dissipation effect is poor, which can easily cause the overheating damage of the commutator body and the reduction of wear resistance.

[0005] Therefore, we propose a wear-resistant high-speed commutator. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model provides a wear-resistant high-speed commutator, which solves the problem that the prior art only relies on the outer surface of the commutator body to contact with air for heat dissipation, and the heat dissipation effect is poor, which can easily cause the overheating damage of the commutator body and the reduction of wear resistance.

[0007] To achieve the above purpose, the utility model realizes the following technical scheme: a wear-resistant high-speed commutator, comprising a commutator body, a plurality of commutator segments are fixedly installed on the outer surface of the commutator body in a ring array, a welding wire hook is arranged at the end of each commutator segment, an insulating mica sheet is arranged between adjacent commutator segments, and a dust removal assembly is arranged on the front side of the commutator body.

[0008] The front and rear end faces of the commutator body are symmetrically provided with annular grooves, the bottom surface of the annular groove is provided with a heat dissipation groove, and the inside of the commutator body is provided with an insulating heat dissipation assembly.

[0009] The insulation heat dissipation assembly comprises an insulation sleeve arranged inside the commutator body, an outer surface of the insulation sleeve is fixedly provided with heat dissipation plates arranged in a ring array and movably sleeved inside the heat dissipation groove, the heat dissipation plates are matched with the heat dissipation groove in specification, an outer diameter of the insulation sleeve is smaller than an inner diameter of the commutator body, and a space between the insulation sleeve and an inner wall of the commutator body is set as a heat dissipation space.

[0010] Preferably, the insulation sleeve and the heat dissipation plates are integrally formed, and the insulation sleeve and the heat dissipation plates are made of alumina ceramic, wherein the integrally formed structure is stable and reliable, and the alumina ceramic has the characteristics of insulation, high temperature resistance and heat conductivity.

[0011] Preferably, the insulation sleeve is movably sleeved inside the commutator body, both ends of the insulation sleeve are provided with annular connecting plates movably sleeved inside annular grooves, an inner diameter of the annular connecting plates is the same as an inner diameter of the insulation sleeve, and an outer diameter of the annular connecting plates is the same as a diameter of the annular grooves, wherein the insulation sleeve and the heat dissipation plates can be limited and fixed inside the commutator body through the annular connecting plates.

[0012] Preferably, the side wall of the annular connecting plate is provided with ventilation openings arranged in a ring array, the ventilation openings are staggered with the heat dissipation plates, and the ventilation openings are arranged one by one with the heat dissipation space, wherein the air in the heat dissipation space can be discharged through the ventilation openings.

[0013] Preferably, the annular connecting plate is detachably installed on the commutator body through bolts, the side wall of the annular connecting plate is provided with circular holes arranged in a ring array, the end surface of the heat dissipation plate is provided with circular holes arranged one by one with the threaded holes, and end heads of the bolts pass through the circular holes and are threadedly sleeved inside the threaded holes, wherein the annular connecting plate is installed on the end surface of the heat dissipation plate through the bolts, and the insulation sleeve and the heat dissipation plates can be limited and fixed inside the commutator body through the annular connecting plate.

[0014] The utility model provides a wear -resisting high -speed commutator, has the following beneficial effects:

[0015] 1. The wear-resistant high-speed commutator increases the air flow rate around the commutator body and the insulating heat dissipation assembly through the dust removal assembly, the heat in the commutator body is sequentially conducted to the insulating sleeve and the heat dissipation plate, and is dissipated to the air through the insulating sleeve and the heat dissipation plate, so that the temperature of the inner wall of the commutator body is reduced, the purpose of simultaneously dissipating heat of the inner wall and the outer wall of the commutator body is achieved, the heat dissipation effect of the commutator body is improved, the service life and wear resistance of the commutator body are increased, and the problems that the existing device only relies on the outer surface of the commutator body to contact the air for heat dissipation, the heat dissipation effect is poor, and the commutator body is easily overheated and damaged and the wear resistance is reduced are solved.

[0016] 2. The wear-resistant high-speed commutator assembles the annular connecting plate on the end face of the insulating sleeve and the heat dissipation plate through the bolt, so that the insulating sleeve and the heat dissipation plate are conveniently positioned and fixed in the interior of the commutator body, and the insulating sleeve and the heat dissipation plate are conveniently disassembled and assembled, and are simple and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a side view structural schematic view of the utility model;

[0019] Figure 3 It is a commutator body structural schematic view of the utility model;

[0020] Figure 4 It is a split structure schematic view of the insulating heat dissipation assembly of the utility model.

[0021] In the drawing: 1, commutator body; 11, annular groove; 12, heat dissipation groove; 2, commutating sheet; 3, dust removal assembly; 4, insulating heat dissipation assembly; 41, insulating sleeve; 42, heat dissipation plate; 43, annular connecting plate; 44, vent; 45, threaded hole; 46, round hole; 47, bolt; 48, heat dissipation space. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Embodiment 1: as Figures 1-4As shown: including commutator body 1, the outer surface of commutator body 1 is fixedly installed with commutator sheet 2 in annular array, the end of commutator sheet 2 is provided with welding wire hook, adjacent commutator sheet 2 is provided with insulating mica sheet, the front side of commutator body 1 is provided with dust removal assembly 3, the front and rear end surface of commutator body 1 is symmetrically provided with annular groove 11, the bottom surface of annular groove 11 is throughly provided with heat dissipation groove 12, the inside of commutator body 1 is provided with insulating heat dissipation assembly 4, insulating heat dissipation assembly 4 includes insulating sleeve 41 arranged in the inside of commutator body 1, the outer surface of insulating sleeve 41 is fixedly installed with heat dissipation plate 42 in annular array and movably sleeved in the inside of heat dissipation groove 12, the specification of heat dissipation plate 42 is matched with heat dissipation groove 12, the outer diameter of insulating sleeve 41 is less than the inner diameter of commutator body 1, the space between insulating sleeve 41 and the inner wall of commutator body 1 is set as heat dissipation space 48, insulating sleeve 41 and heat dissipation plate 42 are integrally formed structure, the material of insulating sleeve 41 and heat dissipation plate 42 is all alumina ceramic, insulating sleeve 41 is movably sleeved in the inside of commutator body 1, both ends of insulating sleeve 41 are provided with annular connecting plate 43 movably sleeved in the inside of annular groove 11, the inner diameter of annular connecting plate 43 is same with the inner diameter of insulating sleeve 41, the outer diameter of annular connecting plate 43 is same with the diameter of annular groove 11, annular connecting plate 43 is provided with ventilation opening 44 in annular array on the side wall, ventilation opening 44 is staggered with heat dissipation plate 42, ventilation opening 44 is one-to-one corresponding with heat dissipation space 48, the rate of air circulation around commutator body 1 and insulating heat dissipation assembly 4 is increased through dust removal assembly 3, and the heat in the inside of commutator body 1 is conducted to insulating sleeve 41 and heat dissipation plate 42 in turn, and is dissipated to air through insulating sleeve 41 and heat dissipation plate 42, which can reduce the temperature of the inner wall of commutator body 1, so as to achieve the purpose of simultaneously dissipating heat for the inner wall and outer wall of commutator body 1, which is beneficial to improve the heat dissipation effect of commutator body 1, and can increase the service life and wear resistance of commutator body 1;

[0024] As shown in Figure 1 and 4 : annular connecting plate 43 is detachably installed on commutator body 1 through bolt 47, annular connecting plate 43 is provided with circular hole 46 in annular array on the side wall, heat dissipation plate 42 is provided with circular hole 46 corresponding to threaded hole 45 on the end surface, the end of bolt 47 passes through circular hole 46 and is threadedly sleeved in the inside of threaded hole 45, annular connecting plate 43 is assembled on the end surface of insulating sleeve 41 and heat dissipation plate 42 through bolt 47, which achieves the purpose of conveniently limiting and fixing insulating sleeve 41 and heat dissipation plate 42 in the inside of commutator body 1, and facilitates the disassembly and assembly of insulating sleeve 41 and heat dissipation plate 42, which is simple and convenient to use.

[0025] The working principle and use process of the utility model: the wear-resistant high-speed commutator, when using, respectively, the insulating sleeve 41 and the heat sink 42 are inserted in the inside of the commutator body 1 and the inside of the heat dissipation groove 12, and the annular connecting plate 43 is placed in the inside of the annular groove 11, the annular connecting plate 43 is assembled on the front and rear end faces of the insulating sleeve 41 and the heat sink 42 using the bolt 47, then the commutator body 1 is assembled on the rotor of the motor, at this time, the insulating sleeve 41 is sleeved on the rotating shaft of the motor, when the rotating shaft of the motor rotates, the commutator body 1 and the dust removal assembly 3 can be driven to rotate together, the rate of air circulation around the commutator body 1 is increased through the dust removal assembly 3, the carbon powder and other chippings on the surface of the commutator body 1 can be blown away, through the arrangement of the insulating sleeve 41 and the heat sink 42, the heat in the inside of the commutator body 1 will be conducted to the heat sink 42 and the insulating sleeve 41 in turn, then the heat in the insulating sleeve 41 and the heat sink 42 will be dissipated to the outside, then the temperature of the commutator body 1 is reduced.

[0026] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, for those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the 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 utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A wear-resistant high-speed commutator, comprising a commutator body (1), an outer surface of the commutator body (1) is fixedly provided with commutator segments (2) in an annular array, an end of the commutator segment (2) is provided with a welding wire hook, an insulating mica sheet is arranged between adjacent commutator segments (2), and a dust removal assembly (3) is arranged on a front side of the commutator body (1). characterized in that Annular grooves (11) are symmetrically formed on front and rear end faces of the commutator body (1), a bottom surface of the annular groove (11) is through-provided with a heat dissipation groove (12), and an insulating heat dissipation assembly (4) is arranged in the interior of the commutator body (1). The insulating heat dissipation assembly (4) comprises an insulating sleeve (41) arranged in the interior of the commutator body (1), an outer surface of the insulating sleeve (41) is fixedly provided with heat dissipation plates (42) in an annular array and movably sleeved in the heat dissipation groove (12), the heat dissipation plate (42) is matched with the heat dissipation groove (12) in specification, the outer diameter of the insulating sleeve (41) is smaller than the inner diameter of the commutator body (1), and a space between the insulating sleeve (41) and the inner wall of the commutator body (1) is set as a heat dissipation space (48).

2. A wear resistant high speed commutator according to claim 1 wherein: The insulating sleeve (41) and the heat dissipation plate (42) are in an integral molding structure, and the insulating sleeve (41) and the heat dissipation plate (42) are both made of aluminum oxide ceramic.

3. A wear resistant high speed commutator as defined in claim 1, wherein: The insulating sleeve (41) is movably sleeved in the interior of the commutator body (1), both ends of the insulating sleeve (41) are provided with annular connecting plates (43) movably sleeved in the annular groove (11), the inner diameter of the annular connecting plate (43) is the same as the inner diameter of the insulating sleeve (41), and the outer diameter of the annular connecting plate (43) is the same as the diameter of the annular groove (11).

4. A wear resistant high speed commutator according to claim 3 wherein: Ventilation openings (44) in an annular array are formed on a side wall through which the annular connecting plate (43) passes, the ventilation openings (44) are staggered with the heat dissipation plates (42), and the ventilation openings (44) are one-to-one correspondingly arranged with the heat dissipation space (48).

5. A wear resistant high speed commutator according to claim 3 wherein: The annular connecting plate (43) is detachably installed on the commutator body (1) through bolts (47), circular holes (46) in an annular array are formed on a side wall of the annular connecting plate (43), circular holes (46) are formed on an end surface of the heat dissipation plate (42) and are one-to-one correspondingly arranged with threaded holes (45), and end heads of the bolts (47) pass through the circular holes (46) and are threadedly sleeved in the interior of the threaded holes (45).

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