Motor cover suitable for six-stage motor and six-stage motor

Abstract

The utility model discloses a motor cover suitable for a six-stage motor, which comprises a motor cover shell, a shaft hole for a motor shaft to pass through is coaxially arranged on the motor cover shell, an annular groove is further arranged on the periphery of the shaft hole, and two groups of carbon brushes symmetrically arranged on the periphery of the annular groove are arranged in the motor cover shell. Each group of carbon brushes comprises two carbon brushes which are oppositely arranged along the radial direction of the annular groove, an included angle of connecting lines of the two groups of carbon brushes is 60 degrees, a first winding frame and a second winding frame are arranged between outer angles of the connecting lines of the two groups of carbon brushes, and a first inductance coil and a second inductance coil are respectively wound on the first winding frame and the second winding frame; and a wiring terminal is arranged between one included angle of the two groups of carbon brushes. According to the scheme, the current transmission efficiency is improved, the abrasion of the carbon brush is reduced, the service life of a product is prolonged, and the conductive stability is ensured.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a motor cover suitable for a six-pole motor and a six-pole motor. Background Technology

[0002] The main differences between a six-pole motor and a four-pole motor lie in the number of magnetic poles, speed, size, and torque. A six-pole motor has one more pair of magnetic poles than a four-pole motor, and it is also larger in size and has a higher output torque. In practical applications, six-pole motors typically have a longer service life and offer higher reliability and stability than four-pole motors. Furthermore, six-pole motors have a higher load capacity than four-pole motors. Due to their performance advantages, six-pole motors are commonly used in applications requiring high speed, high efficiency, and high reliability, such as large mechanical equipment like air compressors, water pumps, and centrifuges.

[0003] To increase the efficiency of current transmission, reduce carbon brush wear, and extend service life, it is necessary to appropriately increase the number of carbon brushes. However, in the existing technology, in some motor end covers with four carbon brushes, the carbon brushes are usually arranged in a 90° cross pattern along the outer periphery of the commutator. This type of carbon brush layout is only suitable for electromagnetic circuits of four-pole motors due to the magnetic pole arrangement. Since there are three pairs of magnetic poles evenly arranged in a six-pole motor, if four cross-shaped carbon brushes are set in this case, it is impossible to ensure that the carbon brushes are placed on the center line of the magnetic poles so that the carbon brushes make accurate contact with the rotating excitation poles, thus failing to ensure the stability and efficiency of motor operation. Therefore, to ensure accurate current transmission, existing six-pole motors typically only have two carbon brushes. For example, the invention patent with authorization announcement number CN102570759B discloses a three-phase motor, including a housing, end cover, motor shaft, rotor, stator, and electronic commutator. The rotor has several windings connected in series. These windings are connected to the electronic commutator through a conduction structure and power lines located between the rotor and stator. The conduction structure includes two concentric slip rings and two carbon brushes, with the two carbon brushes resting against the surfaces of the two slip rings. This design cannot meet the requirements for more efficient current transmission and longer service life. Furthermore, the spatial arrangement of the carbon brushes, other components, and conductive lines within the motor cover also affects the stability of the motor's conductive operation. Simultaneously, during operation, the carbon brushes need to continuously extend and retract, contacting the commutator to transmit current to the armature to maintain rotation. Therefore, the stability of the connections between the various components of the carbon brushes is also extremely important. Utility Model Content

[0004] Therefore, in order to solve the above problems, this utility model provides a motor cover suitable for a six-pole motor and a six-pole motor.

[0005] This utility model is achieved through the following technical solution:

[0006] A motor cover suitable for a six-pole motor includes a motor cover housing. The motor cover housing has a coaxial shaft hole for the motor shaft to pass through. An annular groove for mounting a commutator is also provided around the outer periphery of the shaft hole. The motor cover housing includes two sets of carbon brushes symmetrically arranged around the outer periphery of the annular groove. Each set of carbon brushes includes two carbon brushes arranged radially opposite each other along the annular groove, such that the connecting lines of the two carbon brushes in each set pass through the axis of the annular groove. The included angle between the connecting lines of the two sets of carbon brushes is 60°. The carbon brushes are all positioned... The carbon brush holder has openings at both its inner and outer ends. A spring bracket is provided at the outer end of the carbon brush holder, and an elastic element is connected between the spring bracket and the carbon brush. The carbon brush extends and retracts radially along the annular groove. A first winding frame and a second winding frame are provided between the outer corners of the two sets of carbon brush connecting wires. The first winding frame and the second winding frame are symmetrically arranged on both sides of the annular groove. A first inductor coil and a second inductor coil are respectively wound on the first winding frame and the second winding frame. A terminal is provided between one of the included angles of the two sets of carbon brushes.

[0007] Preferably, each carbon brush box is provided with a positioning mechanism on both sides. The positioning mechanism includes two first snap-fit ​​members staggered on both sides of the carbon brush box. The first snap-fit ​​members are fixed to the inner surface of the motor cover housing. The carbon brush box is also provided with two second snap-fit ​​members that match the first snap-fit ​​members on both sides.

[0008] Preferably, each carbon brush box is also provided with a clearance groove on one side for avoiding the carbon brush braid. The clearance groove is provided along the length direction of the carbon brush box, and the carbon brush braid extends out from the clearance groove.

[0009] Preferably, the device includes a first carbon brush, a second carbon brush, a third carbon brush, and a fourth carbon brush, wherein the first carbon brush and the third carbon brush are arranged facing each other, the second carbon brush and the fourth carbon brush are arranged facing each other, the first inductor coil is arranged between the first carbon brush and the second carbon brush, and the second inductor coil is arranged between the third carbon brush and the fourth carbon brush.

[0010] Preferably, the carbon brush braids of the first carbon brush and the second carbon brush are respectively disposed on the side close to the first inductor coil, and the carbon brush braids of the first carbon brush and the second carbon brush are both connected to the first pin of the first inductor coil. The carbon brush braids of the third carbon brush and the fourth carbon brush are respectively disposed on the side close to the second inductor coil, and the carbon brush braids of the third carbon brush and the fourth carbon brush are both connected to the first pin of the second inductor coil.

[0011] Preferably, a first terminal block is provided at the end of the first inductor coil near the terminal block, and a second terminal block is provided at the end of the second inductor coil near the terminal block. The second pin of the first inductor coil is mounted on the first terminal block and connected to the terminal block, and the second pin of the second inductor coil is mounted on the second terminal block and connected to the terminal block.

[0012] Preferably, the winding frame includes a winding shaft for winding an inductor coil, and limiting blocks disposed on both sides of the winding shaft.

[0013] A six-pole motor, including a motor cover as described above for a six-pole motor.

[0014] The beneficial effects of this utility model's technical solution are mainly reflected in:

[0015] 1. Two sets of four carbon brushes are arranged on the outer periphery of the annular groove, and the included angle of the connecting lines of the two sets of carbon brushes is 60°. On the one hand, compared with the existing six-pole motor, the efficiency of current transmission is increased, while reducing the wear of carbon brushes, extending the time for replacing carbon brushes and other parts, and the overall service life of the motor. On the other hand, the carbon brush layout in this solution can be applied to the electromagnetic circuit of a six-pole motor. In addition, by making full use of the space between the inner and outer angles of the two sets of carbon brushes, the compactness of the arrangement of various electrical components in the motor cover can be improved, while the length of each conductive line can be shortened as much as possible to avoid mutual interference and ensure conductivity stability.

[0016] 2. The carbon brush is limited and protected by the carbon brush box, and its extension and retraction are achieved by the elastic element between the carbon brush and the spring bracket. In addition, the carbon brush braid is located on the side close to the inductor coil, which can shorten the length of the carbon brush braid and avoid the carbon brush braid from contacting the housing and causing a short circuit. The carbon brush box is provided with a relief groove to avoid interfering with the operation of the carbon brush.

[0017] 3. The carbon brush box is secured by a first and second clip that are staggered on both sides, which ensures the stability of the carbon brush box. Compared with simple screw fixing, it increases the fixing area and prevents the carbon brush box from loosening after long-term use. Attached Figure Description

[0018] Figure 1 This is a 3D view of a motor cover suitable for a P6 motor;

[0019] Figure 2 This is a top view of the motor cover suitable for a six-pole motor;

[0020] Figure 3 yes Figure 2 Enlarged view of section A;

[0021] Figure 4 This is a cross-sectional view of a motor cover suitable for a six-pole motor;

[0022] Figure 5 It is a 3D diagram of a six-pole motor. Detailed Implementation

[0023] To make the objectives, advantages, and features of this utility model clearer and more detailed, the following non-limiting description of preferred embodiments will be illustrated and explained. These embodiments are merely typical examples of applying the technical solutions of this utility model; any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0024] It should also be stated that, in the description of the solution, the terms "center", "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" in this solution are used for descriptive purposes only and should not be construed as indicating or implying a ranking of importance, or implicitly specifying the number of technical features shown. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0026] This utility model discloses a motor cover suitable for a six-pole motor, such as... Figures 1-4 As shown, the device includes a motor cover housing 1. The motor cover housing 1 has a coaxial shaft hole 2 for the motor shaft to pass through. An annular groove 3 for mounting a commutator is also provided around the outer periphery of the shaft hole 2. The motor cover housing 1 includes two sets of carbon brushes symmetrically arranged around the outer periphery of the annular groove 3. Each set of carbon brushes includes two carbon brushes arranged radially opposite each other along the annular groove 3, such that the connecting lines of the two carbon brushes in each set pass through the axis of the annular groove 3. The included angle between the connecting lines of the two sets of carbon brushes, i.e., the interior angle of the two connecting lines, is 60°. On the one hand, the arrangement of four carbon brushes increases the efficiency of current transmission compared to two carbon brushes, while reducing carbon brush wear, extending the time between replacing carbon brushes and other parts, and the overall service life of the motor. On the other hand, a six-pole motor typically has three pairs of evenly arranged magnetic poles. Therefore, the two sets of carbon brushes arranged at 60° angles ensure accurate positioning of the carbon brushes relative to the center line of the magnetic poles, which is suitable for the electromagnetic circuit of a six-pole motor, thereby ensuring accurate contact between the carbon brushes and the rotating excitation poles and transmitting the excitation current to the excitation coil.

[0027] like Figures 2-4 As shown, all carbon brushes are disposed within a carbon brush holder 4. The carbon brush holder 4 has openings at both its inner and outer ends. The inner end of the carbon brush holder 4 refers to the end closer to the annular groove 3, and the outer end refers to the end farther from the annular groove 3. A spring bracket 5 is provided at the outer end of the carbon brush holder 4, and an elastic element 6 connects the spring bracket 5 to the carbon brush. The carbon brush extends from the inner opening of the carbon brush holder 4 and extends and retracts radially along the annular groove 3, so that the carbon brush contacts the commutator disposed within the annular groove 3.

[0028] A first winding frame and a second winding frame are provided between the outer corners of the two sets of carbon brush connecting wires. The first winding frame and the second winding frame are symmetrically arranged on both sides of the annular groove 3. A first inductor coil 7 and a second inductor coil 8 are respectively wound on the first winding frame and the second winding frame. The outer corners of the two sets of carbon brush connecting wires are 120°, so the space between the outer corners of the two sets of carbon brush connecting wires is large enough to accommodate two inductor coils. It also facilitates the connection between the carbon brushes and the inductor coils through conductive lines. A terminal 14 is provided between one of the included corners of the two sets of carbon brushes. The inductor coil is conductively connected to the terminal 14, thereby connecting to an external circuit.

[0029] like Figure 2 , Figure 3 As shown, in some embodiments, each carbon brush box 4 is provided with a positioning mechanism on both sides. The positioning mechanism includes two first snap-fit ​​members 402 staggered on both sides of the carbon brush box 4. The first snap-fit ​​members 402 are fixed to the inner surface of the motor cover housing 1. The carbon brush box 4 is also provided with two second snap-fit ​​members 403 that match the first snap-fit ​​members 402 on both sides. In one embodiment, the first snap-fit ​​members 402 are I-shaped. Each second snap-fit ​​member 403 includes two F-type buckles symmetrically arranged along the extension and retraction direction of the carbon brush. Since the two F-type buckles are arranged side by side along the extension and retraction direction of the carbon brush, it can ensure that they limit the first snap-fit ​​member 402 in the extension and retraction direction of the carbon brush. The two F-type buckles in the second snap-fit ​​member 403 form an I-shaped positioning groove that matches the shape of the first snap-fit ​​member 402. The first snap-fit ​​member 402 is embedded in the I-shaped positioning groove, which facilitates quick disassembly and assembly, and at the same time ensures the stability of the connection between the carbon brush box 4 and the end cover housing.

[0030] In some embodiments, each carbon brush box 4 is further provided with a relief groove 401 on one side for avoiding the carbon brush braid. The relief groove 401 is provided along the length direction of the carbon brush box 4, and the carbon brush braid of the carbon brush extends out from the relief groove 401, thereby avoiding interference from the carbon brush box 4 when the carbon brush braid moves with the carbon brush extension and retraction.

[0031] like Figures 1-3As shown, in some embodiments, the motor cover suitable for a six-pole motor includes a first carbon brush 9, a second carbon brush 10, a third carbon brush 11, and a fourth carbon brush 12. The first carbon brush 9 and the third carbon brush 11 are arranged facing each other, and the second carbon brush 10 and the fourth carbon brush 12 are arranged facing each other. The first inductor coil 7 is disposed between the first carbon brush 9 and the second carbon brush 10, and the second inductor coil 8 is disposed between the third carbon brush 11 and the fourth carbon brush 12. The carbon brush braids of the first carbon brush 9 and the second carbon brush 10 are respectively disposed on the side close to the first inductor coil 7, and the carbon brush braids of the first carbon brush 9 and the second carbon brush 10 are both connected to the first inductor coil 7. The first pin 701 of the inductor coil is provided. The carbon brush braids of the third carbon brush 11 and the fourth carbon brush 12 are respectively located on the side close to the second inductor coil 8, and both the carbon brush braids of the third carbon brush 11 and the fourth carbon brush 12 are connected to the first pin 801 of the second inductor coil. The length of the carbon brush braids is minimized to avoid interference with the motor housing due to excessive length. Simultaneously reducing the length of the first pin 701 of the first inductor coil and the first pin 801 of the second inductor coil further ensures the stability of conductivity. The electrical connection method between the carbon brush braids and the first pins of the two inductor coils can refer to existing technologies, such as welding, etc., and will not be discussed here. To elaborate further; in a preferred embodiment, a first terminal block 15 is provided at one end of the first inductor coil 7 near the terminal 14, and a second terminal block 16 is provided at one end of the second inductor coil near the terminal 14. The second pin 702 of the first inductor coil rests on the first terminal block 15 and is connected to the terminal 14, and the second pin 802 of the second inductor coil rests on the second terminal block 16 and is connected to the terminal 14. In one embodiment, a third terminal block 17 and a fourth terminal block 18 are also provided on both sides of the terminal 14, and the terminal 14 is also connected to... There is a first conductive wire 19 and a second conductive wire 20. The first conductive wire 19 is laid on the third terminal block 17, and the second conductive wire 20 is laid on the fourth terminal block 18. The first conductive wire 19 is conductively connected to the second pin 702 of the first inductor coil, and the second conductive wire 20 is conductively connected to the second pin 802 of the second inductor coil. This is to ensure the stability of the positioning of each conductive wire, which will not be described in detail here. The winding frame includes a winding shaft for winding the inductor coil, and limiting blocks 13 disposed on both sides of the winding shaft. The two limiting blocks 13 are used to limit the radial width of the inductor coil to prevent the inductor coil from spreading out.

[0032] like Figure 5 As shown, this utility model also discloses a six-pole motor, including a motor cover suitable for a six-pole motor as described above. The internal structure of the six-pole motor can be referred to the prior art, and will not be described in detail here.

[0033] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A motor cover suitable for a six-pole motor, comprising a motor cover housing, wherein the motor cover housing has a coaxially arranged shaft hole for passing through a motor shaft, and the outer periphery of the shaft hole is further provided with an annular groove for mounting a commutator, characterized in that: The motor cover housing includes two sets of carbon brushes symmetrically arranged around the outer periphery of the annular groove. Each set of carbon brushes includes two brushes arranged radially opposite each other along the annular groove, such that the connecting lines of the two brushes in each set pass through the axis of the annular groove. The included angle of the connecting lines of the two sets of carbon brushes is 60°. The carbon brushes are all housed in a carbon brush holder, which is open at both its inner and outer ends. A spring bracket is provided at the outer end of the carbon brush holder, and an elastic element connects the spring bracket to the carbon brushes. The carbon brushes extend and retract radially along the annular groove. A spacer is provided between the outer angles of the connecting lines of the two sets of carbon brushes. A first winding frame and a second winding frame are symmetrically arranged on both sides of the annular groove. A first inductor coil and a second inductor coil are wound on the first winding frame and the second winding frame, respectively. A terminal is provided between one of the included angles of the two sets of carbon brushes. A positioning mechanism is provided on both sides of each carbon brush box. The positioning mechanism includes two first snap-fit ​​members staggered on both sides of the carbon brush box. The first snap-fit ​​members are fixed to the inner surface of the motor cover housing. Two second snap-fit ​​members matching the first snap-fit ​​members are also provided on both sides of the carbon brush box.

2. The motor cover for a six-pole motor according to claim 1, characterized in that: Each carbon brush box also has a clearance groove on one side for avoiding the carbon brush braid. The clearance groove is arranged along the length of the carbon brush box, and the carbon brush braid extends out from the clearance groove.

3. The motor cover for a six-pole motor according to claim 2, characterized in that: It includes a first carbon brush, a second carbon brush, a third carbon brush, and a fourth carbon brush, with the first carbon brush and the third carbon brush facing each other, the second carbon brush and the fourth carbon brush facing each other, the first inductor coil being disposed between the first carbon brush and the second carbon brush, and the second inductor coil being disposed between the third carbon brush and the fourth carbon brush.

4. The motor cover for a six-pole motor according to claim 3, characterized in that: The carbon brush braids of the first carbon brush and the second carbon brush are respectively disposed on the side close to the first inductor coil, and the carbon brush braids of the first carbon brush and the second carbon brush are both connected to the first pin of the first inductor coil. The carbon brush braids of the third carbon brush and the fourth carbon brush are respectively disposed on the side close to the second inductor coil, and the carbon brush braids of the third carbon brush and the fourth carbon brush are both connected to the first pin of the second inductor coil.

5. The motor cover for a six-pole motor according to claim 1, characterized in that: The first inductor coil has a first terminal block near the terminal, and the second inductor coil has a second terminal block near the terminal. The second pin of the first inductor coil is mounted on the first terminal block and connected to the terminal. The second pin of the second inductor coil is mounted on the second terminal block and connected to the terminal.

6. The motor cover for a six-pole motor according to claim 1, characterized in that: The winding frame includes a winding shaft for winding an inductor coil, and limiting blocks disposed on both sides of the winding shaft.

7. A six-pole motor, characterized in that: Includes the motor cover for a six-pole motor as described in any one of claims 1-6.

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