Electrical equipment

Abstract

This invention provides a method for positioning wire harnesses within the housing of electrical devices using a simple structure and a simple process. [Solution] The electrical device (electric motor) disclosed herein comprises a housing body having an opening, a housing cover that closes the opening, a wire harness, and a clip. The housing body houses electrical devices such as a rotor and a stator. The wire harness runs along the back surface of the housing cover, which is opposite the stator. The clip is fixed to the housing and opens toward the back surface of the housing cover. The wire harness passes through the clip; that is, the clip holds the wire harness in place.

Description

Technical Field

[0001] The technology disclosed in this specification relates to electrical devices such as electric motors.

Background Art

[0002] For electrical devices represented by electric motors, brackets are used to place wire harnesses at predetermined positions within their housings. The bracket disclosed in Patent Document 1 has a cylindrical main body through which the wire harness passes and a mounting portion for fixing the main body to an electrical device inside the housing. When using this bracket, a process of passing the wire harness through the main body of the bracket and then fixing the bracket to the electrical device is required.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The bracket of Patent Document 1 has a complex structure and the mounting process also becomes complicated. This specification provides a means to place a wire harness at a predetermined position within the housing of an electrical device with a simple structure and a simple process.

Means for Solving the Problems

[0005] The electrical equipment disclosed herein comprises a housing body having an opening, a housing cover that closes the opening, a wire harness, and a clip. The electrical device is housed in the housing body. The wire harness runs along the back surface of the housing cover. The clip is secured to the electrical device and opens toward the back surface of the housing cover. The wire harness passes through the clip; that is, the clip holds the wire harness in place.

[0006] In the electrical device disclosed herein, the wire harness is guided by a clip and positioned in place when the housing cover is attached to the housing body. The wire harness is positioned in place when the housing cover is attached to the housing body. The wire harness can be positioned in place in a simple process. The clip only needs to be open toward the back of the housing cover and has a simple structure. The electrical device disclosed herein allows the wire harness to be positioned in place within the housing in a simple structure and simple process.

[0007] A typical example of an electrical device is an electric motor. The electrical devices housed in the main housing are the stator and rotor of the electric motor, and the clips are attached to the resin coil end covers that cover the coil ends of the stator. The clips may be made of the same resin as the coil end covers.

[0008] Details of the technology disclosed herein and further improvements are described in the following "Modes for Carrying Out the Invention". [Brief explanation of the drawing]

[0009] [Figure 1] The diagram shows a side view and a front view of the electrical device (electric motor) in the given embodiment, using the coordinate system shown in the figure. [Figure 2] This is a side view showing the housing cover separated from the main housing body. [Figure 3] This is a side view of the variation clip. [Modes for carrying out the invention]

[0010] The electrical device of the embodiment will be described with reference to the drawings. The electrical device of the embodiment is electric motor 2. Hereafter, "electric motor" will be simply referred to as "motor". Figure 1 shows a side view and a front view of motor 2. The left side of Figure 1 shows the side view, and the right side shows the front view. The axis Ax of motor 2 is parallel to the X axis of the coordinate system in the figure. Note that in Figure 1, motor 2 is cut off by a dashed line, and a part of motor 2 is omitted. Also, in Figure 1, the housing body 10 and housing cover 20 are drawn with dashed lines to show the internal structure of motor 2.

[0011] The stator 13 and rotor 14 of motor 2 are housed in the housing body 10. The housing body 10 is cylindrical, and an opening 10a is provided at one end of the housing body 10. The housing cover 20 closes the opening 10a. The housing cover 20 is fixed to the housing body 10 with bolts. A hole is provided in the center of the housing cover 20, and the shaft 14a of the rotor 14 passes through this hole and extends out of the housing cover 20.

[0012] The coil end 13a of the stator 13 is covered by a coil end cover 15. The coil end cover 15 faces the back surface 20a of the housing cover 20. A clip 16 is attached to the coil end cover 15. The coil end cover 15 and the clip 16 are made of the same type of resin.

[0013] The body of the clip 16 has a U-shape, with the tip of the U facing the back surface 20a of the housing cover 20. In other words, the U-shaped clip 16 opens towards the back surface 20a of the housing cover 20.

[0014] The wire harness 23 passes inside the U-shape of the clip 16. The wire harness 23 is a signal wire connecting the rotation speed sensor 22 and the connector 21. The rotation speed sensor 22 measures the rotation speed of the rotor 14. The sensor signal from the rotation speed sensor 22 is sent to the connector 21 through the wire harness 23. Part of the connector 21 is exposed outside the housing cover 20, and a cable (not shown) extending from the controller is connected to the connector 21. The sensor signal from the rotation speed sensor 22 is transmitted to the controller through the wire harness 23, the connector 21, and the cable. Power may also be supplied from the controller to the rotation speed sensor 22 through the wire harness 23, the connector 21, and the cable.

[0015] The rotation speed sensor 22 and connector 21 are fixed to the housing cover 20. The wire harness 23 extends along the back surface 20a of the housing cover 20.

[0016] A rib 24 is provided on the back surface 20a of the housing cover 20, and the wire harness 23 passes inside the U-shape of the clip 16 and is sandwiched between the clip 16 and the rib 24. The wire harness 23 is fixed in place by being sandwiched between the clip 16 and the rib 24.

[0017] Figure 2 shows a side view of the housing cover 20 separated from the housing body 10. Before the housing cover 20 is assembled to the housing body 10, the wire harness 23 is not fixed except at both ends and may swing around. In the motor 2, when the housing cover 20 is attached to the housing body 10, the wire harness 23 is guided by the clip 16 and positioned in the predetermined location. The wire harness 23 is positioned in the predetermined location when the housing cover 20 is attached to the housing body 10. The clip 16 only needs to be open toward the housing cover 20 and has a simple structure. In particular, the wire harness 23 is firmly fixed by being sandwiched between the rib 24 provided on the back surface 20a of the housing cover 20 and the clip 16. The wire harness 23 is also fixed to the clip 16 at the same time as the process of attaching the housing cover 20 to the housing body 10. The technology of this embodiment allows the wire harness to be positioned in the predetermined location within the housing of the motor 2 (electrical equipment) with a simple structure and a simple process. Here, "inside the housing" refers to the space enclosed by the housing body 10 and the housing cover 20.

[0018] Figure 3 shows several variations of the clip 16. The clip 16a in Figure 3(a) has the same shape as the clip 16 in Figures 1 and 2. The clip 16a has a U-shaped clip body 32 and a support column 31 that supports the clip body 32. The support column 31 is attached to the electrical device inside the housing body 10. In this embodiment, the support column 31 is attached to the coil end cover 15 inside the housing body 10. The coil end cover 15 is part of the electrical device. The clip 16a and the coil end cover 15 are made of the same type of resin. The clip 16a may be molded at the same time as the coil end cover 15 is molded. The same applies to the clips 16b-16d described later.

[0019] The clip 16b in Figure 3(b) has a V-shaped clip body 33 and a support column 31 that supports the clip body 33. By using a V-shaped clip body 33, the wire harness 23 is positioned at the narrow bottom of the V-shape.

[0020] The clip 16c in FIG. 3(c) has a U-shaped clip body 34 and a support column 31 that supports the clip body 34. Return parts 34a are provided at both ends of the U-shape of the clip body 34. The return parts 34a protrude inside the U-shape. The return parts 34a prevent the wire harness 23 housed inside the clip body 34 from falling off.

[0021] The clip 16d in FIG. 3(d) has a U-shaped clip body 35 and a support column 31 that supports the clip body 35. A return part 35a is provided at one end of the U-shape of the clip body 35. The return part 35a also prevents the wire harness 23 housed inside the clip body 35 from falling off. The clip 16d may be arranged such that the return part 35a is located below the wire harness 23 when the motor 2 is used.

[0022] Points to note regarding the technology described in the embodiments are described. The electric device in the embodiments is the motor 2. In the motor 2, the stator 13 and the rotor 14 are housed in the housing body 10. The stator 13 and the rotor 14 are an example of an electric device housed in the housing body 10 of the electric device. The technology of the embodiments can also be applied to electric devices other than motors.

[0023] The housing body 10 is cylindrical and has an opening 10a at one end in the axial direction. The housing cover 20 closes the opening 10a. The opening may be provided anywhere on the housing body 10.

[0024] One end of the wire harness 23 is connected to the connector 21, and the other end is connected to the rotation speed sensor 22. The connector 21 and the rotation speed sensor 22 are fixed to the housing cover 20. The wire harness 23 only needs to be fixed to the housing cover 20 at least at one end. More specifically, the wire harness 23 only needs to be fixed to the housing cover 20 or a structure attached to the housing cover 20 (connector 21) at least at one end. The other end of the wire harness 23 may be a freely moving connector or may be fixed to a structure of the housing body 10. The wire harness 23 may run along the back surface 20a of the housing cover 20. The wire harness 23 is connected to electrical equipment related to the electrical device housed in the housing body 10. The wire harness 23 may be a cable that transmits electrical signals or power.

[0025] For example, one end of the wire harness may be a temperature sensor fixed to the housing cover 20. The temperature sensor measures the internal temperature of the housing body 10. Alternatively, the temperature sensor measures the temperature of the oil circulating inside the housing body 10. The other end of the wire harness may extend outward through a hole provided in the housing cover 20.

[0026] The clip 16 should be positioned so that it supports the underside of the wire harness 23 when the motor 2 is in use.

[0027] The features of the electrical device (motor 2) described in the example are listed below.

[0028] The clip 16 is U-shaped or V-shaped and opens toward the back surface 20a of the housing cover 20. In other words, the clip 16 is U-shaped or V-shaped and has two ends facing the back surface 20a of the housing cover 20.

[0029] The clip 16 is secured to the housing body 10. More specifically, the clip 16 is secured to an electrical device (e.g., a coil end cover 15) housed in the housing body 10. The wire harness 23 runs along the back surface 20a of the housing cover 20 and passes through the clip 16.

[0030] The wire harness 23 is sandwiched between the structure (rib 24) on the back surface 20a of the housing cover 20 and the clip 16. More specifically, the wire harness 23 is secured by being sandwiched between the structure (rib 24) on the back surface 20a of the housing cover 20 and the clip 16.

[0031] Without the rib 24, the wire harness 23 may be secured by being sandwiched between the clip 16 and the back surface 20a of the housing cover 20.

[0032] The clip bodies 34 and 35 are U-shaped or V-shaped, and at least one of their two ends may be provided with a return 34a or 35a to prevent the wire harness 23 from falling off.

[0033] The housing body 10 may also house other devices (such as a gear set) in addition to electrical devices such as the stator 13 and rotor 14.

[0034] Although specific examples of the present invention have been described in detail above, these are merely illustrative and do not limit the scope of the claims. The technologies described in the claims include various modifications and changes to the specific examples illustrated above. The technical elements described in this specification or drawings exhibit technical usefulness individually or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technologies illustrated in this specification or drawings can achieve multiple objectives simultaneously, and achieving even one of these objectives itself constitutes technical usefulness. [Explanation of symbols]

[0035] 2: Electric motor 10: Housing body 10a: Opening 13: Stator 13a: Coil end 14: Rotor 14a: Shaft 15: Coil end cover 16, 16a, 16b, 16c, 16d: Clip 20: Housing cover 20a: Back side 21: Connector 22: Rotation speed sensor 23: Wire harness 24: Rib 31: Support column 32, 33, 34, 35: Clip body 34a, 35a: Return

Claims

1. A housing body having an opening and housing an electrical device, A housing cover that closes the aforementioned opening, The wire harness running along the back of the aforementioned housing cover, A clip fixed to the aforementioned electrical device and opening toward the rear, It is equipped with, An electrical device in which the wire harness passes through the clip.

2. The aforementioned electrical device is the stator of an electric motor, The electrical device according to claim 1, wherein the clip is attached to a resin coil end cover that covers the coil end of the stator.

3. The electrical device according to claim 2, wherein the clip is made of the same resin as the coil end cover.

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