Joining structure

Abstract

To provide a joining structure capable of joining a power line bus bar and a stator coil while absorbing the differences in size between motors with a simple configuration.SOLUTION: The joining structure is a joining structure between a power line bus bar 2 and a stator lead wire 4 of the stator coil. The power line bus bar 2 has a flat braided copper wire portion 3 formed on the other end side thereof. The stator lead wire 4 has a joint end 42 formed with multiple protrusion-shaped portions 41 capable of being hooked onto the flat braided copper wire portion 3.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a joint structure. [Background technology]

[0002] The power line bus bar that connects the inverter and the motor's stator coil has a shape that is specific to each type of motor, and in order to share it between motors, it needs to be designed to accommodate the physical differences between the motors.

[0003] For example, Patent Document 1 discloses a power line bus bar that includes a flexible main body and a core member that extends in a direction connecting both ends of the main body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-009781 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned Patent Document 1, when the bus bar and the lead wires of the stator coil of the motor are joined by welding, it is difficult to adjust the position to a degree that can absorb the difference in size between motors. Therefore, there is a need for a technology that can join the power line bus bar and the stator coil with a simple configuration while absorbing the difference in size between motors.

[0006] The present disclosure has been made in consideration of the above, and aims to provide a joining structure between a power line bus bar and a stator coil that can join the power line bus bar and the stator coil while absorbing physical differences between motors with a simple configuration. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, the joining structure of the present disclosure is a joining structure of a power line bus bar, one end of which is joined to an inverter, and a stator lead wire of a stator coil, wherein the power line bus bar has a flat braided copper wire portion formed by a flat braided copper wire on the other end side, and the stator lead wire has a joining end portion formed by a plurality of protrusion-shaped portions that can be hooked onto the flat braided copper wire portion. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to join the power line bus bar and the stator coil while absorbing the physical differences between motors, and it is also possible to increase the contact area between the flat braided copper wire portion and the pull-out wire, thereby avoiding restrictions on the amount of current flow. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing a joining structure between a power line bus bar and a stator coil according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an enlarged view of a part of a flat braided copper wire portion according to one embodiment of the present disclosure. [Figure 3] FIG. 3 is a plan view showing a specific joining structure between a flat braided copper wire portion and a lead wire of a stator coil according to an embodiment of the present disclosure. [Figure 4] FIG. 4 is a side view showing a specific joining structure between a flat braided copper wire portion and a lead wire of a stator coil according to one embodiment of the present disclosure. [Figure 5] FIG. 5 is an enlarged side view of a portion of a joining surface where a lead wire of a stator coil is joined to a flat braided copper wire portion according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes a joining structure between a stator lead wire and a power bus bar according to an embodiment of the present disclosure, with reference to the drawings. Note that the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially identical. Furthermore, the figures referenced in the following description merely show a schematic representation of the shape, size, and positional relationship to the extent that the contents of the present disclosure can be understood. In other words, the present disclosure is not limited to the shape, size, and positional relationship illustrated in each figure.

[0011] [Power line bus bar and stator coil joint structure] FIG. 1 is a schematic diagram showing a joining structure between a power line bus bar and a stator coil according to an embodiment of the present disclosure.

[0012] The joint structure 100 shown in FIG. 1 includes a resin part 1, a power line bus bar 2, a flat braided copper wire part 3, and a lead wire 4 of a stator lead wire of a stator coil, which will be described later.

[0013] The resin part 1 is formed, for example, in an annular shape and is provided at the axial end of the stator of the motor. Note that Fig. 1 shows only half of the annular resin part 1. The motor may be, for example, a three-phase induction motor.

[0014] The power line bus bar 2 electrically connects the inverter and the stator coil of the motor. One end of the power line bus bar 2 is connected to the inverter, and the other end is connected to the stator coil. The power line bus bar 2 is made up of three wires corresponding to the U phase, V phase, and W phase.

[0015] The power line busbar 2 has a flat braided copper wire section 3 on the other end opposite to the end (one end) joined to the inverter. Three flat braided copper wire sections 3 are provided corresponding to the U-phase, V-phase, and W-phase, and each is embedded in the resin section 1.

[0016] Fig. 2 is an enlarged view of a part of the flat braided copper wire portion 3. As shown in Fig. 2, the flat braided copper wire portion 3 is formed by flat braiding copper wires.

[0017] Furthermore, as shown in FIGS. 3, 4 and 5, lead wires 4 of the stator coil are joined to the flat braided copper wire portion 3.

[0018] The lead wire 4 has a joint end 42 formed with a plurality of protruding portions 41 that can be hooked onto the flat braided copper wire portion 3. The plurality of protruding portions 41 have a barbed shape that hooks onto the flat braided copper wire portion 3, and when they come into contact with the flat braided copper wire portion 3, they enter the stitches of the flat braided copper wire portion 3, thereby joining to the flat braided copper wire portion 3. In other words, the lead wire 4 electrically joins the power line bus bar 2 and the stator coil by each of the plurality of protruding portions 41 hooking onto the stitches of the flat braided copper wire portion 3 like a hook-and-loop fastener.

[0019] As described above, conventional power line bus bars have a dedicated shape for each type of motor, and even if a conventional flexible bus bar itself is made flexible, it is difficult to adjust its position to accommodate differences in size between motors. Furthermore, even if the conventional power line bus bar and the lead wires of the stator coil are joined by welding or bolting, there is a limit to the position adjustment.

[0020] On the other hand, according to the joining structure 100 between the power line busbar 2 and the stator coil, the power line busbar 2 is provided with a flat braided copper wire portion 3, and the pull-out wire 4 is fixed by hooking the plurality of protrusions 41 on the flat braided copper wire portion 3. Furthermore, according to the joining structure 100 between the power line busbar 2 and the stator coil, the pull-out wire 4 is fixed by hooking the plurality of protrusions 41 on the pull-out wire 4 onto the joining surface of the flat braided copper wire portion 3, which increases the contact area between the flat braided copper wire portion 3 and the pull-out wire 4. This makes it possible to join the power line busbar 2 and the stator coil with a simple configuration while absorbing differences in size between motors.

[0021] According to the embodiment described above, by hooking the flat braided copper wire portion 3 onto the plurality of protruding portions 41 on the lead wire 4 of the stator coil, position adjustment and fixation can be performed at the same time.

[0022] Furthermore, according to one embodiment, the joining can be completed simply by hooking the flat braided copper wire portion 3 onto the multiple protrusion-shaped portions 41 on the draw-out wire 4, thereby simplifying the joining between the power line busbar 2 and the stator coil.

[0023] Furthermore, according to one embodiment, the draw-out wire 4 is fixed by hooking multiple protrusion-shaped portions 41 onto the joint surface of the flat braided copper wire portion 3, thereby increasing the contact area between the flat braided copper wire portion 3 and the draw-out wire 4, thereby avoiding restrictions on the amount of current flow.

[0024] Furthermore, according to one embodiment, the joint position between the flat braided copper wire portion 3 and the lead wire 4 of the stator coil can be adjusted at the joint surface, so that the same power line bus bar 2 can be shared even for motors of different sizes.

[0025] Furthermore, according to one embodiment, motors of different sizes can share the power line bus bar 2. Furthermore, by sharing the power line bus bar 2, the required size can be known in advance, and therefore, mounting space can be secured in advance.

[0026] Further advantages and modifications will readily occur to those skilled in the art. The invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

[0027] Although some of the embodiments of the present application have been described in detail above with reference to the drawings, these are merely examples, and the present invention can be implemented in other forms that have undergone various modifications and improvements based on the knowledge of those skilled in the art, including the aspects described in the disclosure of the present invention. [Explanation of symbols]

[0028] 1 Resin part 2 Power line bus bar 3 Plain braided copper wire section 4. Leader lines 41 Protruding shape part 41 42 Joint end 42

Claims

[Claim 1] A joining structure of a power line bus bar, one end of which is joined to an inverter, and a stator lead wire of a stator coil, The power line bus bar is A flat braided copper wire portion formed by a flat braided copper wire is provided on the other end side, The stator lead wire is A joint end portion formed with a plurality of protruding portions that can be hooked onto the flat braided copper wire portion; It has. Joint structure.

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