Motor unit

Abstract

To provide a technology of grasping a part of a signal line extending from a thermistor mounted on a stator of a second motor.SOLUTION: A motor unit includes a first motor and a second motor for driving a wheel, a case having a first housing range housing the first motor and a second housing range adjoining the first housing range and housing the second motor, a terminal base which is fixed to an outer surface of the case in the first housing range and to which one end of a power line extending from the first motor is connected, a signal line which extends from a thermistor mounted on a stator of the second motor and is wired across the power line of the first motor, a connector connected to one end of the signal line and fixed to the outer surface of the case in the first housing range, and a clamp which is disposed on the power line of the first motor or the terminal base and which grasps a part of the signal line.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present specification discloses a motor unit including a motor. [Background technology]

[0002] Patent Document 1 describes a motor. The motor includes a thermistor that detects the temperature of a coil, and a connector is connected to the thermistor via a signal line. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-108938 A Summary of the Invention [Problem to be solved by the invention]

[0004] This type of motor is used in the motor unit of an electric vehicle. In this case, the motor is housed in a case, and the case is fixed to the vehicle body. A connector connected to the thermistor is fixed to the outer surface of the case. In addition, a terminal block for the power line that supplies power to the motor is also fixed to the outer surface of the case.

[0005] For example, a motor unit of a hybrid vehicle has a first motor and a second motor, and the case that houses them is relatively large. Therefore, depending on design requirements, etc., the signal line connecting the thermistor and the connector in the case may be relatively long. In particular, if the connector connected to the thermistor of the second motor is located on the side closer to the first motor, the connector will be located away from the second motor. In this case, the signal line extending from the thermistor of the second motor to the connector will be relatively long. A long signal line is prone to vibration. For this reason, it is possible to suppress the vibration generated in the signal line by gripping a part of the signal line. However, if a clamp that grips a part of the signal line is added to the case, it is necessary to newly add space to the case to place the clamp.

[0006] This specification provides a technique for gripping a part of a signal wire extending from a thermistor attached to a stator of a second motor in a motor unit having a first motor and a second motor. [Means for solving the problem]

[0007] The motor unit disclosed in this specification comprises a case having a first motor and a second motor for driving wheels, a first accommodation range for accommodating the first motor, and a second accommodation range adjacent to the first accommodation range for accommodating the second motor, a terminal block fixed to the outer surface of the case in the first accommodation range and to which one end of a power line extending from the first motor is connected, a signal line extending from a thermistor attached to the stator of the second motor and arranged to cross the power line of the first motor, a connector connected to one end of the signal line and fixed to the outer surface of the case in the first accommodation range, and a clamp provided on either the power line of the first motor or the terminal block and configured to hold a portion of the signal line.

[0008] In the above configuration, the clamp that holds the signal line is provided on the power line or the terminal block of the first motor. With this configuration, it is possible to suppress vibration of the signal line without providing a clamp that holds the signal line on the case.

[0009] Details and further improvements of the technology disclosed in this specification are described in the following "Forms for Carrying Out the Invention". [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a conceptual diagram of a motor unit. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] (Configuration of motor unit 10; Figs. 1 to 3) The motor unit 10 is mounted on a hybrid vehicle. The motor unit 10 is, for example, a power train including a transmission in addition to a motor. The motor unit 10 includes a case 12, a terminal block 14, a connector 16, a first motor 20, and a second motor 30. The first motor 20 and the second motor 30 drive the wheels of the hybrid vehicle. For example, the output torque of the first motor 20, the output torque of the second motor 30, and the output torque of an engine (not shown) mounted on the hybrid vehicle are combined by a power distribution mechanism (not shown) and transmitted to the wheels. In addition, when braking the hybrid vehicle, one of the first motor 20 or the second motor 30 may generate power using regenerative energy.

[0012] The case 12 accommodates a first motor 20 in a first accommodation range 12a, and accommodates a second motor 30 in a second accommodation range 12b adjacent to the first accommodation range 12a.

[0013] The terminal block 14 is fixed to the upper surface 12c of the case 12 in the first housing area 12a. One end of a power line 22 extending from the first motor 20 is connected to the terminal block 14. One end of a power line 32 extending from the second motor 30 is also connected to the terminal block 14. Each of the power lines 22 and 33 is composed of three lines, and each line corresponds to one of the UVW phases of a three-phase AC. In a modified example, one end of the power line 22 is connected to the terminal block 14, and one end of the power line 32 may be connected to another terminal block installed at a location different from the terminal block 14 (for example, the upper surface 12c in the second housing area 12b).

[0014] Moreover, one end of a power line extending from a power conversion device (not shown) that converts the power of an in-vehicle battery (not shown) into power suitable for each of the motors 20 and 30 is connected to the terminal block 14. Power from the in-vehicle battery is supplied to at least one of the motors 20 and 30 via the terminal block 14. Moreover, power generated by either the first motor 20 or the second motor 30 is supplied to the battery via the terminal block 14.

[0015] The connector 16 is fixed to the side surface 12d of the case 12 in the first housing area 12a. One end of a signal line 24 extending from a thermistor attached to the stator of the first motor 20 is connected to the connector 16. One end of a signal line 34 extending from a thermistor attached to the stator of the second motor 30 is also connected to the connector 16. Each of the signal lines 24 and 34 is composed of multiple lines, for example, two lines.

[0016] To the connector 16, a connector (not shown) that is connected to one end of a signal line extending from an on-board control device (not shown) that controls the hybrid vehicle is detachably connected.

[0017] The signal line 34 extending from the second motor 30 is routed across the power line 22 of the first motor 20. As shown in FIG. 1, the connector 16 is disposed on the side closer to the first motor 20, and the connector 16 is farther from the second motor 30. For this reason, the signal line 34 is relatively long. In general, a long signal line is prone to vibration. For this reason, it is considered that the vibration generated in the signal line can be suppressed by gripping a part of the signal line.

[0018] The motor unit 10 of this embodiment includes a first clamp 40 and a second clamp 42 for gripping a portion of the signal line 34. The first clamp 40 is fixed to the power line 22 of the first motor 20. As shown in FIG. 2, the first clamp 40 includes a gripping portion 40a for gripping the signal line 34 and a mounting portion 40b for mounting to the power line 22. The gripping portion 40a extends from the mounting portion 40b. The gripping portion 40a has a C-shaped cross section. The signal line 34 is inserted from an opening of the C-shape, and the signal line 34 is gripped by the gripping portion 40a. Note that the shape of the gripping portion 40a shown in FIG. 2 is merely an example.

[0019] Second clamp 42 extends downward from the lower surface of terminal block 14. As shown in Fig. 3, the lower end of second clamp 42 is bent twice, i.e., bent in a U-shape. Signal line 34 is inserted from an opening of this bent shape, and signal line 34 is gripped by second clamp 42. It should be noted that the shape of second clamp 42 shown in Fig. 3 is merely one example.

[0020] The second clamp 42 is molded integrally with the terminal block 14. In a modified example, the second clamp 42 may be a component separate from the terminal block 14 and fixed to the terminal block 14 by a fixing means such as a screw.

[0021] (Effects of this embodiment) For example, a comparative example is assumed in which a clamp that grips a portion of the signal line 34 is provided on the case 12. In this comparative example, it is necessary to add new space to the case 12 to place the clamp. Adding space causes the case 12 to become more complicated or larger. In contrast, according to the configuration of the present embodiment, a portion of the signal line 34 is gripped by a first clamp 40 provided on the power line 22 of the first motor 20 and a second clamp 42 provided on the terminal block 14. Vibration of the signal line 34 can be suppressed without providing a clamp that grips the signal line 34 on the case 12.

[0022] (Correspondence) The motor unit 10, the first motor 20, and the second motor 30 are examples of a "motor unit," a "first motor," and a "second motor," respectively. The case 12, the first housing range 12a, and the second housing range 12b are examples of a "case," a "first housing range," and a "second housing range," respectively. The terminal block 14 and the connector 16 are examples of a "terminal block" and a "connector," respectively. The power line 22 and the signal line 34 are examples of a "power line" and a "signal line," respectively. The first clamp 40 or the second clamp 42 is an example of a "clamp."

[0023] Hereinafter, points to note regarding the techniques shown in the embodiments will be described. The motor unit 10 may include one of the first clamp 40 and the second clamp 42, but may not include the other of the first clamp 40 and the second clamp 42. [Explanation of symbols]

[0024] 10: motor unit, 12: case, 12a: first housing area, 12b: second housing area, 12c: top surface, 12d: side surface, 14: terminal block, 16: connector, 20: first motor, 22: power line, 24: signal line, 30: second motor, 32: power line, 34: signal line, 40: first clamp, 40a: gripping portion, 40b: mounting portion, 42: second clamp

Claims

[Claim 1] a first motor and a second motor for driving wheels; a case having a first housing area that houses the first motor and a second housing area that is adjacent to the first housing area and that houses the second motor; a terminal block fixed to an outer surface of the case in the first housing area, the terminal block having one end connected to a power line extending from the first motor; a signal line extending from a thermistor attached to a stator of the second motor and arranged to cross the power line of the first motor; a connector connected to one end of the signal line and fixed to the outer surface of the case in the first housing area; a clamp provided on one of the power line and the terminal block of the first motor and configured to grip a portion of the signal line; A motor unit comprising:

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