Quadrupole series excited motor

Abstract

The utility model discloses a four-pole series excited motor, which is characterized in that the four-pole series excited motor comprises a front-end motor support and a rear-end motor support, and the front-end motor support and the rear-end motor support are fixedly connected through a first fastening bolt. A first coil holder and a second coil holder are arranged on the opposite sides of the front end motor support and the rear end motor support respectively, a plurality of sets of stator iron cores are fixedly arranged between the first coil holder and the second coil holder, and a plurality of sets of wiring terminals are arranged on the first coil holder. Four groups of carbon brush assemblies are arranged between the front-end motor bracket and the first coil holder; according to the utility model, the four groups of carbon brush assemblies are arranged and can be contacted with the surface of the commutator from four directions, so that the balance of the commutator is increased, meanwhile, the four groups of carbon brush assemblies are arranged, so that the motor has the characteristics of large output power and large output torque, and the stability among the additionally arranged four groups of carbon brush assemblies is relatively high; and the service life of the motor can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a four-pole series-excited motor. Background Art

[0002] In the existing conventional series-excited motor series, only one pair of magnetic poles is set on the stator lamination, and 2 brush rotors are equipped. The windings are also designed and placed in each rotor slot in a two-pole manner, with only two branches. Its current density is generally higher than that of the stator current density, and its temperature rise is also higher than that of the stator. Such motors on the market are relatively long in size, unable to meet the requirements of high power and small volume, and cannot be applied to multiple scenarios. Therefore, we designed a four-pole series-excited motor.

[0003] However, there are still some disadvantages in the existing four-pole series-excited motors. For example: First, the contact between the traditional carbon brush and the commutator is not tight enough, resulting in a lower balance of the commutator, and the stability of the traditional carbon brush itself is relatively low. When in use, the carbon brush is likely to fall off from the carbon brush box, thus reducing the use safety. Second, when the traditional commutator rotates, its outer surface generally only contacts the carbon brush, resulting in a lower stability of the commutator and being prone to offset. Therefore, a four-pole series-excited motor is designed. Content of the Utility Model

[0004] Aiming at the problems mentioned in the background art, the purpose of the utility model is to provide a four-pole series-excited motor to solve the problems mentioned in the background art.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions:

[0006] A four-pole series-excited motor includes a front-end motor bracket and a rear-end motor bracket. The front-end motor bracket and the rear-end motor bracket are fixedly connected by a first fastening bolt. First wire frames and second wire frames are respectively arranged on the opposite sides of the front-end motor bracket and the rear-end motor bracket. A plurality of groups of stator cores are fixedly arranged between the first wire frame and the second wire frame. A plurality of groups of wiring terminals are arranged on the first wire frame. Four carbon brush assemblies are arranged between the front-end motor bracket and the first wire frame. The four carbon brush assemblies are distributed in a cross structure. A commutator is arranged between the four carbon brush assemblies. A rotating shaft is arranged on one side of the commutator. A rotor assembly is sleeved on the circumference of the rotating shaft. A first cushion plate and a second cushion plate are arranged inside the front-end motor bracket. The first cushion plate and the second cushion plate are fixedly connected to the front-end motor bracket by a second fastening bolt. Through grooves for inserting the end part of the commutator are respectively opened at the middle positions of the first cushion plate and the second cushion plate. A fan blade assembly is rotatably connected to the outside of the front-end motor bracket.

[0007] Preferably, the carbon brush assembly includes a carbon brush box, carbon brushes, a sliding groove and a spring. One end of the carbon brush box is welded with a connecting ear for fixing. The sliding groove is formed on the upper surface of the carbon brush box. The carbon brushes are slidably arranged in the sliding groove. Two ends of the spring are respectively fixedly arranged on one end of the carbon brush and the inner wall of the sliding groove, and the other end of the carbon brush is arranged outside the commutator.

[0008] Preferably, four groups of limiting flanges are respectively welded at two ends of the upper surface of the carbon brush box, and the carbon brushes are slidably arranged below the limiting flanges.

[0009] Preferably, the rotor assembly includes several groups of rotor cores. Pressing sheets are arranged on both sides of several groups of the rotor cores. A shaft sleeve for the shaft to pass through is integrally formed on the outside of the pressing sheet. A first positioning ring for the front shaft sleeve to be inserted into is sleeved on the circumference of the shaft, and a second positioning ring for the rear shaft sleeve to be inserted into is fixedly arranged on the inner surface of the rear motor bracket.

[0010] Preferably, the fan blade assembly includes a chassis. Several groups of blades are arranged on the inner surface of the chassis. A shaft hole for one end of the shaft to be inserted into is arranged at the middle position of several groups of the blades, and several groups of the blades are all arranged in an arc structure.

[0011] Preferably, four groups of stator coils are arranged on the inner sides of the first wire frame and the second wire frame, and the four groups of stator coils are evenly arranged around the shaft.

[0012] Preferably, four groups of the first fastening bolts and the second fastening bolts are both provided.

[0013] In summary, the present utility model mainly has the following beneficial effects:

[0014] First, by arranging four groups of carbon brush assemblies, the present utility model can contact the surface of the commutator from four directions, thereby increasing the balance of the commutator. At the same time, with four groups of carbon brush assemblies equipped, the motor has the characteristics of large output power and large output torque. In addition, the stability among the four groups of carbon brush assemblies is relatively high, which can effectively prevent the carbon brush assemblies from falling off and increases the safety.

[0015] Second, by arranging the first backing plate and the second backing plate, the present utility model limits the outer surface of the commutator by using the through groove, thereby preventing the commutator from shifting, improving the stability of the commutator position. At the same time, the arranged rotor assembly can increase the stability during the installation of the rotor core. In addition, by arranging the fan blade assembly, when the shaft rotates, the fan blade assembly can be driven to rotate, which can dissipate heat from the motor and thus extend the service life of the motor. Description of the Drawings

[0016] Figure 1 is the structural schematic diagram of the present utility model;

[0017] Figure 2 is one of the exploded structural schematic diagrams of the present utility model;

[0018] Figure 3 is the second exploded structural schematic diagram of the present utility model;

[0019] Figure 4 is the structural schematic diagram of the rotor assembly of the present utility model;

[0020] Figure 5 is the structural schematic diagram of the carbon brush assembly part of the present utility model;

[0021] Figure 6 is the present utility model Figure 5 enlarged view at position A in.

[0022] Reference numerals: 1, front-end motor bracket; 2, rear-end motor bracket; 3, first fastening bolt; 4, first wire frame; 5, second wire frame; 6, stator core; 7, terminal; 8, carbon brush assembly; 81, carbon brush box; 82, carbon brush; 83, chute; 84, spring; 85, limiting flange; 86, connecting ear; 9, commutator; 10, rotating shaft; 11, rotor assembly; 111, rotor core; 112, pressing piece; 113, bushing; 114, first positioning ring; 115, second positioning ring; 12, first backing plate; 13, second backing plate; 14, second fastening bolt; 15, through slot; 16, fan blade assembly; 161, chassis; 162, blade; 163, shaft hole; 17, stator coil. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1

[0025] Refer to Figures 1-6, A four-pole series-wound motor, comprising a front-end motor bracket 1 and a rear-end motor bracket 2. The front-end motor bracket 1 and the rear-end motor bracket 2 are fixedly connected by a first fastening bolt 3. On the opposite sides of the front-end motor bracket 1 and the rear-end motor bracket 2, a first wire frame 4 and a second wire frame 5 are respectively arranged. Between the first wire frame 4 and the second wire frame 5, a plurality of groups of stator cores 6 are fixedly arranged. On the first wire frame 4, a plurality of groups of connection terminals 7 are arranged. Between the front-end motor bracket 1 and the first wire frame 4, four carbon brush assemblies 8 are arranged. The four carbon brush assemblies 8 are distributed in a cross structure. Between the four carbon brush assemblies 8, a commutator 9 is arranged. On one side of the commutator 9, a rotating shaft 10 is arranged. On the circumference of the rotating shaft 10, a rotor assembly 11 is sleeved. Inside the front-end motor bracket 1, a first cushion plate 12 and a second cushion plate 13 are arranged. The first cushion plate 12 and the second cushion plate 13 are fixedly connected to the front-end motor bracket 1 by a second fastening bolt 14. Through grooves 15 for the insertion of the end part of the commutator 9 are respectively opened at the middle positions of the first cushion plate 12 and the second cushion plate 13. On the outside of the front-end motor bracket 1, a fan blade assembly 16 is rotatably connected.

[0026] Reference Figures 5-6 , The carbon brush assembly 8 includes a carbon brush box 81, a carbon brush 82, a sliding groove 83 and a spring 84. At one end of the carbon brush box 81, a connecting ear 86 for fixation is welded. The sliding groove 83 is opened on the upper surface of the carbon brush box 81. The carbon brush 82 is slidably arranged in the sliding groove 83. The two ends of the spring 84 are respectively fixedly arranged at one end of the carbon brush 82 and the inner wall of the sliding groove 83, and the other end of the carbon brush 82 is arranged on the outside of the commutator 9; the spring 84 is in a compressed state and can, under the push of the spring 84, make the carbon brush 82 slide in the sliding groove 83, so that the carbon brush 82 always abuts tightly against the outside of the commutator 9 to meet the working requirements of the motor.

[0027] Reference Figures 5-6 , At both ends of the upper surface of the carbon brush box 81, four groups of limiting flanges 85 are respectively welded. The carbon brush 82 is slidably arranged below the limiting flanges 85. The arranged limiting flanges 85 can prevent the carbon brush 82 from popping out from above the sliding groove 83 and can play a role in limiting the carbon brush 82.

[0028] Reference Figure 4, the rotor assembly 11 includes several groups of rotor cores 111. Pressing plates 112 are arranged on both sides of several groups of the rotor cores 111. An axle sleeve 113 for the rotation shaft 10 to pass through is integrally formed on the outer side of the pressing plate 112. A first positioning ring 114 for the front axle sleeve 113 to be inserted into is sleeved on the circumference of the rotation shaft 10. A second positioning ring 115 for the rear axle sleeve 113 to be inserted into is fixedly arranged on the inner surface of the rear motor bracket 2. By providing the pressing plates 112, several groups of rotor cores 111 can be limited and fixed. At the same time, when the front motor bracket 1 and the rear motor bracket 2 are fixed by the first fastening bolts 3, the axle sleeve 113 can be inserted into the first positioning ring 114 and the second positioning ring 115, and the two-side axle sleeves 113 are clamped by the first positioning ring 114 and the second positioning ring 115, so as to complete the pressing effect of the pressing plates 112 and increase the stability of the rotor cores 111.

[0029] Reference Figures 1-3 , in order to facilitate the motor to drive the blade 162 to rotate and to facilitate ventilation and heat dissipation and increase the heat dissipation efficiency; the fan blade assembly 16 includes a chassis 161. Several groups of blades 162 are arranged on the inner surface of the chassis 161. A shaft hole 163 for one end of the rotation shaft 10 to be inserted into is arranged at the middle position of several groups of the blades 162, and several groups of the blades 162 are all arranged in an arc structure.

[0030] Reference Figures 1-3 , in order to enable the motor to have the advantages of low speed and high torque; four groups of stator coils 17 are arranged on the inner sides of the first wire holder 4 and the second wire holder 5, and the four groups of stator coils 17 are evenly arranged around the rotation shaft 10.

[0031] Reference Figures 1-3 , in order to increase the stability of the structural connection and thus improve the service life of the motor; four groups of the first fastening bolts 3 and the second fastening bolts 14 are both provided.

[0032] Principle of use and advantages:

[0033] The utility model can contact the surface of the commutator 9 from four directions by arranging four groups of carbon brush assemblies 8, thereby increasing the balance of the commutator 9. At the same time, with four groups of carbon brush assemblies 8 equipped, the motor has the characteristics of large output power and large output torque. In addition, the stability among the four groups of carbon brush assemblies 8 is relatively high. By sliding the carbon brush 82 in the chute 83 and using the limiting flange 85 to prevent the carbon brush 82 from popping out from above the chute 83, the situation of the carbon brush 82 falling off can be effectively prevented, increasing the safety. By arranging the first backing plate 12 and the second backing plate 13, the outer surface of the commutator 9 is limited by the through groove 15, thereby preventing the commutator 9 from shifting, and thus improving the stability of the position of the commutator 9. At the same time, for the arranged rotor assembly 11, through the arranged pressing piece 112, a plurality of groups of rotor cores 111 can be limited and fixed. At the same time, when the front motor bracket 1 and the rear motor bracket 2 are fixed by the first fastening bolt 3, the shaft sleeve 113 can be inserted into the first positioning ring 114 and the second positioning ring 115, and the two side shaft sleeves 113 are clamped by the first positioning ring 114 and the second positioning ring 115, thereby completing the pressing effect of the pressing piece 112, increasing the stability of the rotor core 111. In addition, by arranging the fan assembly 16, when the rotating shaft 10 rotates, the fan assembly 16 can be driven to rotate, which can dissipate heat from the motor, thereby prolonging the service life of the motor.

[0034] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A four-pole series-excited motor, comprising a front motor bracket (1) and a rear motor bracket (2), characterized in that: The front-end motor bracket (1) and the rear-end motor bracket (2) are fixedly connected by a first fastening bolt (3); a first wire frame (4) and a second wire frame (5) are respectively arranged on opposite sides of the front-end motor bracket (1) and the rear-end motor bracket (2); a plurality of groups of stator cores (6) are fixedly arranged between the first wire frame (4) and the second wire frame (5); a plurality of groups of connection terminals (7) are arranged on the first wire frame (4); four groups of carbon brush assemblies (8) are arranged between the front-end motor bracket (1) and the first wire frame (4); the four groups of carbon brush assemblies (8) are distributed in a cross structure; and a plurality of connecting terminals (7) are arranged between the four groups of carbon brush assemblies (8). A commutator (9) is arranged, a rotating shaft (10) is arranged on one side of the commutator (9), a rotor assembly (11) is sleeved on the circumference of the rotating shaft (10), a first pad (12) and a second pad (13) are arranged on the inner side of the front motor bracket (1), the first pad (12) and the second pad (13) are fixedly connected to the front motor bracket (1) by a second fastening bolt (14), a through slot (15) for inserting the end of the commutator (9) is provided at the middle position of the first pad (12) and the second pad (13), and a fan blade assembly (16) is rotatably connected to the outer side of the front motor bracket (1).

2. A four-pole series-excited motor according to claim 1, characterized in that: The carbon brush assembly (8) comprises a carbon brush box (81), a carbon brush (82), a slide groove (83) and a spring (84); one end of the carbon brush box (81) is welded with a connecting ear (86) for fixing; the slide groove (83) is opened on the upper surface of the carbon brush box (81); the carbon brush (82) is slidably arranged in the slide groove (83); the two ends of the spring (84) are respectively fixedly arranged on one end of the carbon brush (82) and the inner wall of the slide groove (83); and the other end of the carbon brush (82) is arranged on the outside of the commutator (9).

3. A four-pole series-excited motor according to claim 2, characterized in that: Four groups of limiting flanges (85) are respectively welded at both ends of the upper surface of the carbon brush box (81), and the carbon brush (82) is slidably arranged below the limiting flanges (85).

4. A four-pole series-excited motor according to claim 1, characterized in that: The rotor assembly (11) comprises a plurality of groups of rotor cores (111), both sides of each of the plurality of groups of rotor cores (111) are provided with clamping plates (112), the outer side of the clamping plates (112) is integrally formed with a shaft sleeve (113) for the shaft (10) to pass through, a first positioning ring (114) for inserting the shaft sleeve (113) at the front end is sleeved on the circumference of the shaft (10), and a second positioning ring (115) for inserting the shaft sleeve (113) at the rear end is fixedly provided on the inner surface of the rear end motor bracket (2).

5. A four-pole series-excited motor according to claim 1, characterized in that: The fan blade assembly (16) comprises a chassis (161), the inner surface of the chassis (161) is provided with a plurality of groups of blades (162), the middle positions of the plurality of groups of blades (162) are provided with shaft holes (163) for inserting one end of the rotating shaft (10), and the plurality of groups of blades (162) are all arranged in an arc-shaped structure.

6. A four-pole series-excited motor according to claim 1, characterized in that: Four groups of stator coils (17) are arranged inside the first wire frame (4) and the second wire frame (5), and the four groups of stator coils (17) are evenly arranged around the rotating shaft (10).

7. A four-pole series-excited motor according to claim 1, characterized in that: The first fastening bolts (3) and the second fastening bolts (14) are each provided in four groups.

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