Bus bar module of motor stator

Abstract

To provide a bus bar module for a motor stator capable of reducing a required space distance for attaching a bus bar and ensuring strength reliability of the bus bar.SOLUTION: A bus bar module 1 of a motor stator 100 according to the present disclosure is the bus bar module 1 of the motor stator 100 attached to a terminal block by fastening a bolt 130 to a plurality of bolt fastening parts 111 of a stator core 110 of the motor stator 100, respectively. The bus bar module 1 is made of resin, and includes a main body part 10 having a hole through which the bolt 130 passes and a recessed part that covers each bolt fastening part 111 of the stator core 110, and a plurality of power lines 21, 22, and 23 each having connection parts 211, 221, and 231 that are fixed to the main body part 10 by resin molding and are in contact with the terminal block.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a busbar module for a motor stator. [Background technology]

[0002] The motor stator is connected and fixed to a terminal block of the stator core via a case. The motor stator has multiple phase coils wound around it, and multiple power lines (lead lines) corresponding to the coils are provided. The multiple power lines are then connected to a power supply line via a busbar unit (busbar module) that includes multiple busbars (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-073897 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, the power line bus bar of a motor stator is fastened to the terminal block of the stator core of the motor stator with bolts. However, since the bolts also become conductive parts, it is necessary to ensure an insulation distance. This has led to the problem of the motor stator stator core becoming larger in size.

[0005] Furthermore, the power bus bar of the motor stator has a long shape that extends between the stator core of the motor stator and the stator core terminal block, so there is a possibility that it may resonate and be damaged by vibrations when the motor is driven.

[0006] The present disclosure has been made to solve such problems, and aims to provide a bus bar module for a motor stator that can reduce the spatial distance required for attaching a bus bar and ensure the strength reliability of the bus bar. [Means for solving the problem]

[0007] The bus bar module of the motor stator of the present disclosure includes: The bus bar module of the motor stator is attached to a terminal block by fastening bolts to a plurality of bolt fastening portions of a stator core of the motor stator, a main body portion made of resin and including a hole for passing the bolt therethrough and a recess portion covering the bolt fastening portion of the stator core; a plurality of power lines each fixed to the main body by a resin molding and having a connection portion that contacts the terminal block; It is equipped with the following. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a bus bar module for a motor stator that can reduce the spatial distance required for attaching a bus bar and ensure the strength reliability of the bus bar. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram of a motor stator equipped with a bus bar module according to the present disclosure. [Figure 2] FIG. 2 is a perspective view of the bus bar module shown in FIG. [Figure 3] 2A and 2B are top and bottom views of the bus bar module shown in FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0010] (Embodiment) Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, the invention according to the claims is not limited to the following embodiments. Furthermore, not all of the configurations described in the embodiments are necessarily essential as means for solving the problems. For clarity of explanation, the following description and drawings have been omitted and simplified as appropriate. In each drawing, the same elements are assigned the same reference numerals, and duplicate explanations are omitted as necessary.

[0011] <Motor stator busbar module configuration> The configuration of a busbar module of a motor stator according to this embodiment will be described. FIG. 1 is a schematic diagram of a motor stator to which a busbar module according to the present disclosure is attached. FIG. 2 is a perspective view of the busbar module shown in FIG. 1. FIG. 3 is a top view (FIG. 3(a)) and a bottom view (FIG. 3(b)) of the busbar module shown in FIG. 1. Note that FIG. 2(a) is a perspective view of the busbar module in FIG. 1 as seen from the radially outer side, and FIG. 2(b) is a perspective view of the busbar module in FIG. 1 as seen from the opposite side (radially inner side).

[0012] As shown in FIG. 1, a motor stator 100 of this embodiment includes a stator core 110, which is provided with a plurality of bolt fastening portions (ears) 111 (two are shown in FIG. 1). A busbar module 1 of this embodiment is configured to cover one of the bolt fastening portions 111 when the motor stator 100 is assembled to a case (not shown). The motor stator 100 is attached to a terminal block fixed to the case (not shown) by fastening bolts 130 to the bolt fastening portions 111. At this time, the busbar module 1 is also fixed to the terminal block by one bolt 130.

[0013] The busbar module 1 includes a main body 10 and a plurality of (three in this disclosure) power lines 21, 22, and 23. The main body 10 is formed from resin to insulate the power lines 21, 22, and 23 from one another. That is, the power lines 21, 22, and 23 are fixed to the main body 10 by resin molding. As shown in FIGS. 2 and 3 , the main body 10 also includes holes 12 for passing bolts 130 therethrough and recesses 11 for covering bolt fastening portions 111 of the stator core 110.

[0014] The recess 11 is used to position the bus bar module 1 relative to the motor stator 100. That is, the recess 11 has a resin molded shape that matches the shape of the bolt fastening portion 111 of the stator core 110.

[0015] When the motor stator 100 is assembled to the case, the bolt fastening portion 111 is fitted (engaged) into the recess 11. The busbar module 1 is configured to be sandwiched between the motor stator 100 and the bolt seat surface of the terminal block as the fastening force of the bolt 130 is transmitted to the bolt fastening portion 111.

[0016] The power lines 21, 22, and 23 have connection portions 211, 221, and 231 for contacting the terminal blocks, respectively. As a result, the power lines 21, 22, and 23 protrude from the top and bottom surfaces of the bus bar module 1 while being insulated from one another within the bus bar module 1, as shown in Fig. 3 .

[0017] In this example, the motor stator 100 is composed of three-phase stator coils. As shown in Fig. 1, each of the three-phase stator coils has three coil terminals (lead wires) 121, 122, and 123 at one end. These coil terminals 121, 122, and 123 are formed by extending one end of the corresponding stator coil substantially radially outward from the motor stator 100 and then bending it at a substantially right angle along the axial direction of the motor stator 100 (the vertical direction in Fig. 1). When the motor stator 100 is assembled into the case, the coil terminals 121, 122, and 123 are connected to the three power lines 21, 22, and 23 of the busbar module 1, respectively.

[0018] If the motor stator 100 is attached to the case by shrink fitting or press fitting rather than by bolts 130, the terminal block contact surface of the busbar module 1 can be set in the radial direction of the motor stator 100, which is the fixing direction, and the busbar module 1 can be fastened to the terminal block in accordance with the shrink fitting or press fitting.

[0019] As described above, the busbar module 1 of the motor stator 100 of the present disclosure is attached to a terminal block by fastening bolts 130 to the multiple bolt fastening portions 111 of the stator core 110 of the motor stator 100. This busbar module 1 includes a main body 10 made of resin and having holes for passing the bolts 130 therethrough and recesses that cover the bolt fastening portions 111 of the stator core 110, and multiple power lines 21, 22, and 23 that are fixed to the main body 10 by resin molding and have connection portions 211, 221, and 231 that contact the terminal block. Configuring the busbar module 1 in this manner eliminates the need to use dedicated bolts for the busbar module 1, thereby reducing the required spatial distance. This enables the overall size of the motor stator 100 to be reduced and the assembly process to be simplified.

[0020] Furthermore, in the busbar module 1, the multiple power lines 21, 22, and 23, which are the conductor portions, are fixed with a resin mold and have a shape that fits along the side surface of the stator core 110 of the motor stator 100. This improves the busbar characteristic value and ensures the strength reliability of the busbar, which was previously an issue.

[0021] The present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention. In other words, the above description has been omitted or simplified as appropriate for the sake of clarity, and a person skilled in the art can easily modify, add, or convert each element of the embodiment within the scope of the present invention. [Explanation of symbols]

[0022] 1 Busbar Module 10 Main body 11 Recess 12 holes 21, 22, 23 power line 211, 221, 231 Connections 100 Motor Stator 110 stator core 111 Bolt fastening part 121, 122, 123 Coil terminals 130 volts

Claims

[Claim 1] The bus bar module of the motor stator is attached to a terminal block by fastening bolts to a plurality of bolt fastening portions of a stator core of the motor stator, a main body portion made of resin and including a hole for passing the bolt therethrough and a recess portion covering the bolt fastening portion of the stator core; a plurality of power lines each fixed to the main body by a resin molding and having a connection portion that contacts the terminal block; A busbar module for a motor stator comprising:

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