Collector ring mounting structure and motor

Abstract

The embodiment of the utility model discloses a collector ring installation structure and a motor, and the collector ring installation structure comprises a bracket which is provided with an axial direction; the plurality of iron cores are mounted on the bracket; the iron core comprises a base body and a shell wrapping the base body. The collecting ring is arranged on one side, facing the axial direction, of the iron core; wherein the collecting ring is fixedly arranged on the shell. According to the utility model, the collecting ring is directly arranged on the intimate shell, so that the bracket is prevented from being extended to the position of the collecting ring to install the collecting ring, the size of the bracket is further reduced, and the weight and the production cost of the product are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a collector ring installation structure and a motor. Background Art

[0002] The motor is the main component in the hybrid powertrain. The three-phase AC motor is widely used in the hybrid powertrain due to its high efficiency, energy saving, high reliability and long service life.

[0003] In a three-phase AC motor, there is a collector ring for transmitting current to the stator winding. In the prior art, the collector ring should be fixed on a bracket for fixing the stator. The axial dimension of the bracket in the collector ring fixing structure needs to be extended to the collector ring position. The axial dimension of the bracket is large, which makes it difficult to meet the requirements of motor lightweighting and cost reduction. Utility Model Content

[0004] The embodiments of the utility model provide a collector ring installation structure and a motor, which replaces the structure of fixed connection between the bracket and the collector ring in the prior art by a structure of fixed connection between the core housing and the collector ring, so as to reduce the axial dimension of the bracket, reduce the weight of the product and reduce the production cost.

[0005] In order to solve the above technical problems, the embodiments of the present utility model disclose the following technical solutions:

[0006] On the one hand, a collector ring installation structure is provided, comprising:

[0007] a bracket, the bracket having an axial direction;

[0008] An iron core, wherein a plurality of the iron cores are mounted on the bracket; the iron core comprises a base body and a shell wrapping the base body;

[0009] A collector ring, which is arranged on a side of the core facing the axial direction;

[0010] Wherein, the collector ring is fixedly mounted on the housing.

[0011] In addition to one or more features disclosed above, or as an alternative, a first connecting member is provided on the side of the shell facing the axial direction, and a second connecting member is provided on the side of the collector ring facing the core direction, and the collector ring is installed on the core by cooperating with the first connecting member and the second connecting member.

[0012] In addition to one or more features disclosed above, or as an alternative, one of the first connecting member and the second connecting member is a boss extending along the axial direction, and the other is a mounting seat having a mounting hole extending along the axial direction at the center, and the boss is at least partially embedded in the mounting hole.

[0013] In addition to or as an alternative to one or more of the features disclosed above, the bracket and the slip ring are separated from each other in the axial direction.

[0014] In addition to or as an alternative to one or more of the features disclosed above, the housing and the first connecting member are an integral structure;

[0015] The collector ring and the second connecting member are an integrated structure.

[0016] In addition to or as an alternative to one or more of the features disclosed above, the material of the housing and the slip ring includes plastic material.

[0017] In addition to or as an alternative to one or more of the features disclosed above, the difference in thermal expansion coefficient between the housing and the collector ring is less than 5.5*10 -6 / ℃.

[0018] In addition to or as an alternative to one or more features disclosed above, the number of the first connecting members is greater than or equal to the number of the second connecting members.

[0019] In addition to or as an alternative to one or more of the features disclosed above, a side of the collector ring facing away from the core is provided with a plurality of grooves extending in the circumferential direction of the collector ring;

[0020] The collector ring further includes a bus bar arranged in the groove.

[0021] In addition to or as an alternative to one or more of the features disclosed above, the slip ring has a threading groove penetrating the slip ring along the axial direction.

[0022] On the other hand, a motor is further disclosed. In addition to or as an alternative to one or more of the features disclosed above, the motor includes a slip ring mounting structure as described in any one of the above items, and the motor further includes:

[0023] A winding, wherein the winding is wound around the outer periphery of the iron core, and the winding and the iron core form a stator;

[0024] A rotor shaft, the rotor shaft is rotatably arranged around the axial direction in a space surrounded by the plurality of stators;

[0025] The rotor is fixedly mounted on the rotor shaft.

[0026] One of the above technical solutions has the following advantages or beneficial effects: the present application replaces the structure of fixed connection between the bracket and the collector ring in the prior art by installing the collector ring on the core housing, thereby avoiding the need to extend the bracket to the collector ring position to install the collector ring, thereby reducing the size of the bracket, the weight of the product and the production cost. The difference in thermal expansion coefficient between the housing and the collector ring material is smaller than the difference in thermal expansion coefficient between the bracket and the collector ring material. When the motor is heated during operation, the structure of fixed connection between the bracket and the collector ring in the present application is less affected by thermal expansion and has better stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0028] Figure 1 It is a structural schematic diagram of a collector ring installation structure provided according to an embodiment of the utility model.

[0029] Figure 2 The figure is a schematic diagram of the exploded structure of a collector ring installation structure provided according to an embodiment of the utility model.

[0030] Figure 3 It is a side view and a cross-sectional view of a collector ring installation structure provided according to an embodiment of the utility model.

[0031] Figure 4 It is a structural schematic diagram of an iron core in a collector ring installation structure provided according to an embodiment of the utility model.

[0032] Figure 5 It is a structural schematic diagram of a collector ring in a collector ring installation structure provided according to an embodiment of the utility model.

[0033] In the figure: 100- bracket; 200- core; 210- base; 220- housing; 221- boss; 300- collector ring; 301- groove; 302- threading groove; 310- mounting seat; 311- mounting hole; 320- busbar; 321- terminal. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementations. It should be understood that the specific implementations described in this specification are only for explaining the present invention, and are not intended to limit the present invention.

[0035] Figure 1 and Figure 2The schematic diagram of the structure and the exploded schematic diagram of the structure of a distribution ring installation structure provided according to an embodiment of the utility model are respectively shown. The collector ring installation structure has an axial direction Z, and the collector ring installation structure includes a bracket 100, an iron core 200 and a collector ring 300. The bracket 100 is a hollow cylindrical structure, and both ends of the bracket 100 in the axial direction Z have open surfaces for the motor rotor shaft to pass through. A plurality of iron cores 200 are fixedly installed on the inner wall of the bracket 100 in the circumferential direction of the bracket 100. The collector ring 300 annular structure is arranged on one side of the iron core 200 in the axial direction Z. In the axial direction Z, the iron core 200 overlaps with the orthographic projection of the collector ring 300.

[0036] Combination Figure 3 As shown, the core 200 includes a block-shaped substrate 210 and a shell 220 wrapped around the surface of the substrate 210. The shell 220 is used to protect the substrate 210 and insulate the substrate 210 from external components (such as windings wound around the periphery of the core 200). The material of the substrate 210 includes silicon steel material, and the material of the shell 220 includes plastic material. The core 200 is fixedly mounted on the inner wall of the bracket 100 through the shell 220. A first connecting member is provided on the side of the shell 220 facing the axial direction Z. A second connecting member is provided on the side of the collector ring 300 facing the core 200 at a position corresponding to the first connecting member, and the first connecting member is matched with the second connecting member to fix the collector ring 300 on the core 200.

[0037] The present application replaces the structure of fixed connection between the bracket and the collector ring in the prior art with a structure in which the collector ring 300 is installed on the shell 220 of the core 200, thereby avoiding the need to extend the bracket 100 to the position of the collector ring 300 for installing the collector ring 300, thereby reducing the size of the bracket 100, reducing the weight of the product and reducing the production cost.

[0038] Specifically, in this embodiment, the first connecting member is a boss 221 extending along the axial direction Z, and the second connecting member is a mounting seat 310 arranged on the side of the collector ring 300 facing the core 200. The axis of the mounting seat 310 has a mounting hole 311 that is compatible with the aperture and the diameter of the boss 221. The boss 221 is at least partially embedded in the mounting hole 311 to fix the collector ring 300 on the core 200.

[0039] It should be noted that, in this embodiment, the boss 221 is disposed on the housing 220 of the core 200, and the mounting seat 310 and the mounting hole 311 are disposed on the collector ring 300. In other embodiments, the boss 221 may also be disposed on the collector ring 300, and the mounting seat 310 and the mounting hole 311 may be disposed on the housing 220, and the positions of the two may be interchanged, which is not specifically limited herein.

[0040] It should also be noted that, in this embodiment, the first connector and the second connector are connection structures in which the boss 221 is matched with the mounting hole 311. In other embodiments, the first connector and the second connector may be connection structures such as buckles, which are not specifically limited here.

[0041] Furthermore, the collector ring mounting structure also includes a first direction X perpendicular to the axial direction Z and a reference plane A perpendicular to the first direction X. In the first direction X, the orthographic projection of the bracket 100 on the reference plane A is separated from the orthographic projection of the collector ring 300 on the reference plane A. Compared with the structure in the prior art in which the bracket 100 extends to the position of the collector ring 300 and is connected to the collector ring 300, the size of the bracket 100 in the axial direction Z of the present application is smaller to meet the demand for lightweight products. The housing 220 and the collector ring 300 are usually made of plastic material with insulating properties, and the bracket 100 is made of metal material. The cost of plastic material is lower than that of metal material, thereby reducing the cost of the product.

[0042] Furthermore, the housing 220 and the first connecting piece are an integrated structure, and the collector ring 300 and the second connecting piece are an integrated structure. Both are formed using an integrated injection molding process, which reduces manufacturing costs. The integrated structure can reduce the number of product parts, simplify the assembly process, and further reduce production costs.

[0043] Furthermore, the materials of the collector ring 300 and the housing 220 include plastic materials, and the thermal expansion coefficients of the materials of the collector ring 300 and the housing 220 are similar, and the thermal expansion coefficient of the collector ring 300 is in the range of 14*10 -6 / ℃~16*10 -6 / ℃, the thermal expansion coefficient of the housing 220 is in the range of 10.5*10 -6 / ℃~12.5*10 -6 / ℃, the difference in thermal expansion coefficients between the two is less than 5.5*10 -6 / ℃. When the motor is working and generating heat, the thermal expansion coefficients of the collector ring 300 and the housing 220 are similar. Compared with the structure in which the metal bracket 100 is connected to the plastic collector ring 300 in the prior art, the connection effect of the first connector and the second connector is less affected by thermal expansion, thereby improving the stability of the product.

[0044] In this embodiment, the present application is provided with 36 cores 200, the number of first connectors is 36 corresponding to the number of cores 200, the number of second connectors provided on the collector ring 300 is 6, and the second connectors are evenly provided on the collector ring 300. It should be noted that in other embodiments, the number of cores 200 can be set according to product performance requirements, the second connectors on the collector ring 300 can also be set according to actual requirements, and the number of first connectors is greater than or equal to the number of second connectors, which is not specifically limited here. The outer shells 220 of all cores 200 have first connectors regardless of whether there are corresponding second connectors, because the outer shells 220 of all cores 200 are formed by injection molding using the same mold, and there is no need to open a mold for designing cores 200 without first connectors, so as to reduce production costs.

[0045] Reference Figure 4 As shown, an annular winding groove is also provided on the outer periphery of the shell 220 of the core 200, and a strip pattern is provided on the bottom of the winding groove. The winding groove is used for bundling the winding on the outer periphery of the core 200. The strip pattern has a limiting effect on the metal wire of the winding, which facilitates bundling in the winding process of the winding and makes the metal wire in the winding evenly arranged, thereby improving the consistency of the stator composed of the core 200 and the winding, thereby improving the reliability and stability of the product.

[0046] Reference Figure 5 As shown, a plurality of annular grooves 301 and busbars 320 are provided on the side of the collector ring 300 away from the core 200, and the grooves 301 are coaxially arranged with the busbars 320. The busbars 320 are used to electrically connect the power input of the motor with the winding of the stator. The busbars 320 are annular structures with a notch. The busbars 320 are arranged in the grooves 301. The grooves 301 are used to isolate the busbars 320 corresponding to different phases to prevent the busbars 320 corresponding to different phases from contacting and short-circuiting. The busbars 320 include a terminal 321 arranged at the notch position of the busbars 320, and the terminal 321 is used to electrically connect the power input and the winding of the stator.

[0047] Furthermore, the lead terminals 321 of adjacent slip rings are staggered with each other in the radial direction of the slip ring 300 to improve the anti-electromagnetic interference (EMI) performance of the product.

[0048] Furthermore, a circular intermittently extending threading groove 302 is provided on the collector ring 300. The threading groove 302 is arranged on the outer periphery of all the grooves 301. The threading groove 302 passes through the collector ring 300 in the axial direction Z. The threading groove 302 is used for threading the line, so that the line is passed from one side of the collector ring 300 to the other side of the collector ring 300. The line electrically connects the winding and the bus 320.

[0049] On the other hand, the present application further discloses a motor. In addition to or instead of one or more of the features disclosed above, the motor includes a collector ring mounting structure as described above, and the motor also includes: a winding, the winding is wound around the outer periphery of the iron core 200, and the winding and the iron core 200 are configured to form a stator; a rotor shaft, the rotor shaft is rotatably arranged around the axial direction Z in a space surrounded by a plurality of stators; and a rotor, the rotor is fixedly mounted on the rotor shaft.

[0050] The above-mentioned embodiments only express several implementation methods of the present application. It should be noted that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of this application shall be subject to the attached claims.

Claims

1. A collector ring installation structure, characterized in that: include: A bracket (100), the bracket (100) having an axial direction (Z); An iron core (200), wherein a plurality of the iron cores (200) are mounted on the bracket (100); the iron core (200) comprises a base body (210) and a shell (220) wrapping the base body (210); A collector ring (300), the collector ring (300) being arranged on a side of the iron core (200) facing the axial direction (Z); Wherein, the collector ring (300) is fixedly mounted on the housing (220).

2. The slip ring installation structure according to claim 1, characterized in that: A first connecting piece is provided on the side of the housing (220) facing the axial direction (Z), and a second connecting piece is provided on the side of the collector ring (300) facing the iron core (200). The collector ring (300) is mounted on the iron core (200) by means of the first connecting piece and the second connecting piece.

3. The slip ring installation structure according to claim 2, characterized in that: One of the first connecting member and the second connecting member is a boss (221) extending along the axial direction (Z), and the other is a mounting seat (310) (310) having a mounting hole (311) extending along the axial direction (Z) at the center, and the boss (221) is at least partially embedded in the mounting hole (311).

4. The slip ring installation structure according to claim 1, characterized in that: In the axial direction (Z), the bracket (100) and the collector ring (300) are separated from each other.

5. The slip ring installation structure according to claim 2, characterized in that: The housing (220) and the first connecting member are an integrated structure; The collector ring (300) and the second connecting member are an integrated structure.

6. The slip ring installation structure according to claim 1, characterized in that: The material of the housing (220) and the collector ring (300) includes plastic material.

7. The slip ring installation structure according to claim 1, characterized in that: The difference in thermal expansion coefficient between the housing (220) and the collector ring (300) is less than 5.5*10 -6 / ℃.

8. The slip ring installation structure according to claim 2, characterized in that: The number of the first connecting members is greater than or equal to the number of the second connecting members.

9. The slip ring installation structure according to claim 1, characterized in that: A plurality of grooves (301) extending in a circumferential direction of the collector ring (300) are provided on a side of the collector ring (300) away from the iron core (200); The collector ring (300) further comprises a bus bar (320) arranged in the groove (301).

10. The slip ring installation structure according to claim 1, characterized in that: The collector ring (300) has a wire threading groove (302) penetrating the collector ring (300) along the axial direction (Z).

11. A motor, characterized in that: The motor comprises the slip ring mounting structure according to any one of claims 1 to 10, and further comprises: A winding, the winding being wound around the outer periphery of the iron core (200), the winding and the iron core (200) forming a stator; a rotor shaft, the rotor shaft being rotatably arranged about the axial direction (Z) and passing through a space surrounded by the plurality of stators; The rotor is fixedly mounted on the rotor shaft.

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