Motor end cover assembly and series excited motor using same

Abstract

The utility model discloses a motor end cover assembly and a series excited motor using the same. The motor end cover assembly comprises an end cover body and a carbon brush unit detachably arranged on the end cover body. The carbon brush unit comprises a carbon brush box with a built-in accommodating cavity, and a carbon brush and a spring which are accommodated in the accommodating cavity of the carbon brush box; an opening communicated with the accommodating cavity is formed in one side end surface of the carbon brush box; the end face, facing the end cover body, of the carbon brush box is provided with a connecting structure in concave-convex fit with the end cover body. A pair of protruding connecting lugs is further arranged on the outer side wall of the carbon brush box, and each connecting lug is suitable for being connected with the end cover body through a fastener. According to the utility model, the dismounting convenience of the carbon brush unit in the motor relative to the end cover can be improved.

Description

Technical Field

[0001] The utility model relates to the field of intelligent equipment, in particular to a motor end cover component and a series-excited motor using the same. Background Art

[0002] The carbon brush in the motor is used on the commutator or slip ring of the motor as a sliding contact body for conducting and importing current. The installation direction of the carbon brush is generally in the radial direction of the motor rotor. When working, the carbon brush needs to be installed in the carbon brush box, and then the carbon brush box is installed on the motor end cover. Among them, the carbon brush box is a component used to install the carbon brush. The spring applies pressure to the carbon brush that is in sliding contact with the commutator or collector ring surface, so that it can stably conduct current between the fixed body and the rotating body.

[0003] In this regard, the prior art, for example, publication number CN117895694A discloses a motor end cover and a motor, on which a carbon brush assembly is provided. The carbon brush assembly is connected to the end cover by bending the connecting foot, and the brush box itself also includes an upper box body and a lower bottom plate that need to be fixed together. In order to meet the installation requirements of the connecting foot, it is necessary to respectively open grooves suitable for the connecting foot to pass through on the lower bottom plate and the end cover. Under this structure, the overall structural design is cumbersome and the workload of assembly is increased. In addition, in the case of bending and connecting, the bent connecting foot needs to be straightened again during the disassembly and assembly process. In this way, the connecting foot may be broken after the bending, straightening and bending process. Therefore, the use of this method of connection that requires bending still has the problem of inconvenience in disassembly and assembly.

[0004] Furthermore, in other prior arts, for example, a motor end cover structure and a motor disclosed in announcement number CN206180738U, a protrusion is provided on the side wall of the carbon brush box, and the protrusion is also bent and fixed after passing through the end cover. Therefore, the prior art also has the problems in the above-mentioned public documents regarding the fixing method of the carbon brush box.

[0005] Therefore, for the fixation of the carbon brush assembly on the end cover, it is necessary to further optimize its connection structure, so as to improve the convenience of its disassembly and assembly and reduce the difficulty of component design. Utility Model Content

[0006] The first object of the utility model is to provide a motor end cover assembly to solve the technical problem of improving the convenience of disassembly and assembly of a carbon brush unit relative to the end cover.

[0007] The second object of the utility model is to provide a series-excited motor to solve the technical problem of improving the convenience of disassembling and assembling a carbon brush unit in the motor relative to an end cover.

[0008] The motor end cover assembly of the utility model is realized as follows:

[0009] A motor end - cover assembly, comprising:

[0010] An end - cover body and a carbon - brush unit detachably disposed on the end - cover body;

[0011] The carbon - brush unit includes a carbon - brush box with an accommodation cavity therein, and a carbon brush and a spring received in the accommodation cavity of the carbon - brush box; and an opening communicating with the accommodation cavity is provided on one of the side end - faces of the carbon - brush box;

[0012] A connecting structure in concave - convex fit with the end - cover body is provided on the end - face of the carbon - brush box facing the end - cover body; and

[0013] A pair of connecting ears in the form of protrusions are further provided on the outer side - wall of the carbon - brush box, and each connecting ear is adapted to be connected to the end - cover body through a fastener.

[0014] In an optional embodiment of the present utility model, the pair of connecting ears are symmetrically disposed on both sides of the connecting structure.

[0015] In an optional embodiment of the present utility model, the fastener is a screw.

[0016] In an optional embodiment of the present utility model, the connecting structure includes a positioning hole recessed on the end - face of the end - cover body facing the carbon - brush box and a positioning seat provided on the carbon - brush box and adapted to be inserted into the positioning hole.

[0017] In an optional embodiment of the present utility model, both the positioning hole and the positioning seat are of a regular - hexagon structure.

[0018] In an optional embodiment of the present utility model, a connecting hole communicating with the positioning hole is further provided on the end - cover body; and

[0019] The connecting hole extends to the side end - face of the end - cover facing away from the carbon - brush unit, and the connecting hole is adapted to be in fastening fit with the motor body part through a bolt.

[0020] The series - excited motor of the present utility model is realized as follows:

[0021] A series - excited motor, comprising: a motor body, the above - mentioned motor end - cover assembly connected to the motor body, and a rotating shaft with one end adapted to penetrate the end - cover body; and

[0022] A communication port adapted for the carbon brush to pass through and communicating with the opening of the carbon - brush box is further provided on the end - cover.

[0023] In an optional embodiment of the present utility model, a commutator is further provided on the rotating shaft; and

[0024] The opening of the carbon - brush box faces the commutator, and one end of the carbon brush is pressed against the commutator after sequentially passing through the opening and the communication port under the action of the spring.

[0025] In an alternative embodiment of the present utility model, a pair of the carbon brush units are provided on the end cover body; and

[0026] A pair of connection structures are provided between the end cover body and the pair of carbon brush units;

[0027] The pair of connection structures are symmetrically arranged about the rotating shaft.

[0028] In an alternative embodiment of the present utility model, the end cover body is made of a metal material or a plastic material.

[0029] Adopting the above technical solution, the present utility model has the following beneficial effects: The motor end cover assembly of the present utility model and the series-wound motor using the same can be applied to the field of servo motor drive and control integration systems. For the cooperation between the carbon brush unit and the end cover body, it can be realized either through the concave-convex mating connection structure or through the connection ear combined with the fastener. Moreover, whether it is the concave-convex mating connection structure or the connection ear combined with the fastener method, both have the effects of simple structural design and convenient assembly and disassembly. And by designing both the connection structure and the connection ear on the carbon brush unit, the adaptability to end cover bodies of different materials can be improved. Therefore, for the end cover body made of plastic material, since its strength is relatively low and it is not suitable to use the fastener method to fix the carbon brush unit, the connection between the carbon brush unit and the end cover body can be realized only by using the concave-convex mating connection structure. For the end cover body made of metal material, on the basis of preliminary positioning through the concave-convex mating connection structure, the carbon brush unit can be finally fixed by further using the connection ear combined with the fastener method. Therefore, regardless of the material used to make the end cover unit, the carbon brush unit of the present utility model can be adaptively disassembled and assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic cross-sectional structure view of the motor end cover assembly according to an embodiment of the present application;

[0031] Figure 2 is a schematic three-dimensional structure view of the motor end cover assembly according to an embodiment of the present application;

[0032] Figure 3 is a schematic view of the positioning holes and connection holes of the motor end cover assembly according to an embodiment of the present application in one embodiment;

[0033] Figure 4 is a schematic view of the end cover body corresponding to the motor end cover assembly according to an embodiment of the present application made of plastic material;

[0034] Figure 5 is a schematic view of the end cover body corresponding to the motor end cover assembly according to an embodiment of the present application made of metal material;

[0035] Figure 6 It is a schematic diagram of the cooperation between the end cover body made of metal material and the carbon brush unit corresponding to the motor end cover assembly of the embodiment of the present application.

[0036] In the figure: end cover body 1, fastening hole 11, positioning hole 12, communication port 13, embedded hole 14, carbon brush box 21, carbon brush 22, spring 23, brush holder 24, positioning seat 25, connecting ear 31, screw 32, hexagon nut 41, bolt 42, connecting hole 43, motor body 51, rotating shaft 52, commutator 6. Detailed implementation manners

[0037] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments in conjunction with the accompanying drawings.

[0038] Embodiment 1:

[0039] Please refer to Figures 1 to 6 As shown, this embodiment provides a motor end cover assembly, including: an end cover body 1 and a carbon brush unit detachably disposed on the end cover body 1. Specifically, the carbon brush unit includes a carbon brush box 21 with an accommodation cavity therein, and a carbon brush 22 and a spring 23 accommodated in the accommodation cavity of the carbon brush box 21; and an opening communicating with the accommodation cavity is provided on one side end face of the carbon brush box 21. The carbon brush 22 here can form a sliding fit with the accommodation cavity through the brush holder 24. For the implementation principle of the specific carbon brush unit, this embodiment does not make improvements, so it is not absolutely limited.

[0040] Based on the above situation, furthermore, the end face of the carbon brush box 21 facing the end cover body 1 is provided with a connection structure that is in concave-convex fit with the end cover body 1; and a pair of connecting ears 31 in the form of protrusions are further provided on the outer side wall of the carbon brush box 21, and each connecting ear 31 is adapted to be connected to the end cover through a fastener, and the fastener here can be selected, for example but not limited to, a screw 32. That is to say, there are two different connection methods on the carbon brush box 21 to connect with the end cover body 1, but for the specific assembly situation between the end cover body 1 and the carbon brush box 21, it still needs to be determined in combination with the different situations of the end cover body 1, and the specific details are described in detail in the following embodiment part.

[0041] On the basis of the above structure, taking an optional implementation situation as an example in combination with the accompanying drawings, a pair of connecting ears 31 are symmetrically disposed on both sides of the connection structure.

[0042] Next, it will be described that, regarding the connection structure, in a preferred embodiment, it includes a positioning hole 12 recessed in the end face of the end cover facing the carbon brush box 21 and a positioning seat 25 provided on the carbon brush box 21 and adapted to be inserted into the positioning hole 12. Of course, theoretically, it could also be that the positioning hole 12 is designed on the carbon brush box 21 and the positioning seat 25 is designed on the end cover. In this embodiment, only the case where the positioning hole 12 is designed on the end cover body 1 is taken as an example in combination with the accompanying drawings (if the positioning hole 12 is provided on the carbon brush box 21, it will affect the wall thickness of the carbon brush box 21, and thus affect the structural strength of the carbon brush box 21).

[0043] On the basis of the above situation, still considering from the perspective of easy processing, for the carbon brush box 21, the carbon brush box 21 itself, a pair of connecting ears 31 and the positioning seat 25 are integrally formed by machining, which can not only ensure the structural strength but also simplify the processing procedure.

[0044] It is necessary to explain here that, combined with the usage occasions of different motors, some end covers designed on motors are made of metal materials, and some end covers designed on motors are made of plastic materials such as but not limited to BMC materials.

[0045] For the end cover body 1 made of plastic material, since the strength is relatively low and it is not applicable to fix the carbon brush unit by means of opening threaded holes on the end cover body 1, it is only possible to set nut embedding holes 14 on the end cover body 1, insert the nut into the end cover body 1 through the embedding holes 14 and ensure that the threaded hole on the nut is aligned with the mounting hole 11, and then fasten the carbon brush assembly, the end cover body 1 and the nut with screws to realize the connection between the carbon brush unit and the end cover body 1, so as to achieve the firmness of the connection structure cooperation and effectively fix the carbon brush unit. At this time, for a pair of connecting ears 31, they may not need to play a role, but their design will not affect the reliable cooperation between the positioning seat 25 and the positioning hole 12.

[0046] For the end cap body 1 made of metal, when it is initially positioned through the concave-convex mating connection structure, the carbon brush unit can be finally fixed by further combining the connecting ear 31 with the fastener. Correspondingly, fastening holes 11 that cooperate with the fastener are preset on the end cap body 1 made of metal. In this case, since the carbon brush 22 receives the elastic force of the spring 23 in the accommodating cavity of the carbon brush box 21, when the carbon brush unit is assembled onto the end cap body 1, the carbon brush 22 is affected by the spring 23 and will generate a certain elasticity to the carbon brush box 21, thus making it more difficult for the fastener to be aligned with the fastening hole 11. Therefore, the connection structure can play a positioning role for the carbon brush unit on the end cap body 1, thereby improving the smoothness of the alignment between the fastener and the fastening hole 11 and enhancing the convenience of assembly. That is to say, for the end cap body 1 made of metal, the cooperation of the positioning hole 12 and the positioning seat 25 and the function of the fastener can be utilized simultaneously to meet the assembly requirements of the carbon brush unit.

[0047] Based on the above situation, regardless of the material used to make the end cap unit, the carbon brush unit of this embodiment can be adaptively disassembled and assembled.

[0048] Next, it should be noted that regarding the positioning hole 12 and the positioning seat 25 used in this embodiment, their general shapes can be circular, square, or other shapes. As long as the positioning hole 12 and the positioning seat 25 can be fitted and matched, it meets the usage requirements of this embodiment, and this embodiment does not make an absolute limitation in this regard.

[0049] However, in a preferred implementation case, both the positioning hole 12 and the positioning seat 25 adopt a regular hexagon structure, and the regular hexagon structure here can accommodate the hexagonal nut 41 to pass through. This design is mainly based on the following considerations:

[0050] First of all, for the end cap body 1, it also needs to be assembled and fixed with the motor body 51. Generally, a bolt 42 is used for this purpose. This bolt 42 needs to pass through the motor body 51 and then be inserted into the end cap body 1 to be connected with the hexagonal nut 41. That is to say, a connection hole 43 that cooperates with this bolt 42 needs to be designed on the end cap body 1. At this time, a connection hole 43 can be designed separately on the end cap body 1, or the connection hole 43 can be designed directly after passing through the positioning hole 12. The connection hole 43 extends to the side end face of the end cap facing away from the carbon brush unit. Since the positioning hole 12 adopts a regular hexagon structure, it will not affect the placement of the hexagonal nut 41 that cooperates with the bolt 42. And in this structure, after the carbon brush unit is assembled with the end cap body 1, the hexagonal nut 41 can be hidden in the positioning hole 12.

[0051] In summary, for the motor end cover assembly of this embodiment, regardless of the material of the end cover body 1, the disassembly and assembly operations between the carbon brush unit and the end cover body 1 are very convenient, and there is no need to adapt different end cover bodies 1 according to the different materials of the end cover body 1. Therefore, the adaptability of the carbon brush unit to the end cover body 1 of different materials is improved.

[0052] Embodiment 2:

[0053] Based on the motor end cover assembly of Embodiment 1, this embodiment provides a series-wound motor, including: a motor body 51, the motor end cover assembly of Embodiment 1 connected to the motor body 51, and a rotating shaft 52 whose one end is adapted to penetrate the end cover body 1; and a communication port 13 adapted for the carbon brush 22 to pass through and communicating with the opening of the carbon brush box 21 is further provided on the end cover.

[0054] On the basis of the above structure, further, a commutator 6 is further provided on the rotating shaft 52; and the opening of the carbon brush box 21 faces the commutator 6, and one end of the carbon brush 22 is pressed against the commutator 6 after sequentially passing through the opening and the communication port 13 under the action of the spring 23.

[0055] In a specific and optional implementation manner, a pair of carbon brush units are provided on the end cover body 1; and two positioning holes 12 for one-to-one cooperation with the pair of carbon brush units are provided on the end cover body 1; the two positioning holes 12 are symmetrically arranged with the rotating shaft 52 as the center, and this structure can ensure that the carbon brush 22 is aligned with the middle position of the commutator 6.

[0056] In summary, for the series-wound motor of this embodiment, the disassembly and assembly of the carbon brush unit and the end cover body 1 are convenient and efficient, and for the structure connecting the carbon brush unit and the end cover body 1, the design is simple and easy to process, and there is no need to change its shape such as bending to meet the assembly requirements.

[0057] In the above specific embodiments, the purpose, technical solution, and beneficial effects of the present invention are further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0058] In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention.

[0059] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0060] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0061] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0062] In the present utility model, unless otherwise clearly specified and defined, the first feature being above or below the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being above, over and on the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under and beneath the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

Claims

1. A motor end cover assembly, characterized in that: include: An end cover body and a carbon brush unit detachably arranged on the end cover body; The carbon brush unit comprises a carbon brush box with a built-in accommodating cavity, and a carbon brush and a spring accommodated in the accommodating cavity of the carbon brush box; and one of the side end surfaces of the carbon brush box is provided with an opening communicating with the accommodating cavity; The end surface of the carbon brush box facing the end cover body is provided with a connecting structure which is concave-convex matched with the end cover body; and A pair of protruding connecting ears are also provided on the outer side wall of the carbon brush box, and each connecting ear is suitable for being connected to the end cover body through a fastener.

2. The motor end cover assembly according to claim 1, characterized in that: A pair of connecting ears are symmetrically arranged on both sides of the connecting structure.

3. The motor end cover assembly according to claim 1 or 2, characterized in that: The fasteners are screws.

4. The motor end cover assembly according to claim 1 or 2, characterized in that: The connection structure comprises a positioning hole which is concavely arranged on the end surface of the end cover body facing the carbon brush box and a positioning seat which is arranged on the carbon brush box and is suitable for being inserted into the positioning hole.

5. The motor end cover assembly according to claim 4, characterized in that: The positioning hole and the positioning seat both adopt a regular hexagonal structure.

6. The motor end cover assembly according to claim 5, characterized in that: The end cover body is also provided with a connection hole communicating with the positioning hole; and The connection hole extends to the side end surface of the end cover body facing away from the carbon brush unit, and the connection hole is suitable for fastening with the motor body through bolts.

7. A series-excited motor, characterized in that: include: A motor body, a motor end cover assembly as claimed in any one of claims 1 to 6 connected to the motor body, and a rotating shaft having one end adapted to pass through the end cover body; and The end cover body is also provided with a communication port which is communicated with the opening of the carbon brush box and is suitable for the carbon brush to pass through.

8. The series motor according to claim 7, characterized in that: The rotating shaft is also provided with a commutator; and The opening of the carbon brush box faces the commutator, and under the action of the spring, one end of the carbon brush passes through the opening and the connecting port in sequence and then presses toward the commutator.

9. The series motor according to claim 8, characterized in that: A pair of carbon brush units are disposed on the end cover body; and A pair of connecting structures are provided between the end cover body and the pair of carbon brush units; A pair of connecting structures are symmetrically arranged with the rotating shaft as the center.

10. The series motor according to any one of claims 7 to 9, characterized in that: The end cover body is made of metal or plastic.

Images