CN115668705A - Motor component, motor, and method for manufacturing motor component - Google Patents

Abstract

The motor component includes a capacitor and a ground terminal. The capacitor has a capacitor element and lead terminals. The lead terminal is electrically connected to the capacitor element. The ground terminal is electrically connected to ground and the lead terminal. The ground terminal holds the lead terminal therebetween, and thereby electrically connects the lead terminal to the ground terminal.

Description

Motor component, motor, and method for manufacturing motor component

Technical Field

The present disclosure relates generally to motor components, motors, and methods of manufacturing motor components. More specifically, the present disclosure relates to a motor component including a capacitor, a motor including the motor component, and a method of manufacturing the motor component.

Background

The electric motor described in patent document 1 includes a rotor, a power supply terminal, and a capacitor for reducing noise. The power supply terminal is composed of two electrode plates in a strip plate shape facing each other and in parallel. The power supply terminal supplies power from a power source to the rotor. One of the two leads (lead terminals) of the capacitor is soldered to the positive electrode plate of the power supply terminal, and the other is soldered to the negative electrode plate (ground terminal) of the power supply terminal.

However, the lead wire is connected to the electrode plate by soldering, which requires heating and cooling, and thus has a problem of taking time.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2008-206310

Disclosure of Invention

An object of the present disclosure is to provide a motor component in which a lead terminal and a ground terminal are mechanically and electrically connected without soldering, a motor, and a method for manufacturing the motor component.

A motor component according to an aspect of the present disclosure includes a capacitor and a ground terminal. The capacitor has a capacitor element and lead terminals. The lead terminal is electrically connected to the capacitor element. The ground terminal is electrically connected to ground and the lead terminal. The ground terminal holds the lead terminal and is electrically connected to the lead terminal by sandwiching the lead terminal.

A motor according to an aspect of the present disclosure includes the motor member and the motor main body. The motor main body includes a stator and a rotating shaft. The rotating shaft rotates relative to the stator.

A method of manufacturing a motor component according to an aspect of the present disclosure is a method of manufacturing a motor component including a capacitor, a ground terminal, and a holding member. The capacitor has a capacitor element and lead terminals. The lead terminal is electrically connected to the capacitor element. The ground terminal is electrically connected to ground and the lead terminal. The holding member holds the ground terminal and the lead terminal. The manufacturing method comprises a 1 st step and a 2 nd step after the 1 st step. In the step 1, the lead terminal is held by the holding member. In the step 2, the lead terminal is sandwiched by the ground terminal, whereby the ground terminal holds the lead terminal and the ground terminal is electrically connected to the lead terminal.

The present disclosure has the advantages of: the lead terminal and the ground terminal are mechanically and electrically connected without soldering.

Drawings

Fig. 1 is a rear view of a motor part of an embodiment.

Fig. 2 is a front view of a motor part of the embodiment.

Fig. 3 is a sectional view schematically showing the structure of a motor including the motor component according to the embodiment.

Fig. 4 is a cross-sectional view of section IV-IV of fig. 1.

Fig. 5 is a cross-sectional view of the V-V section of fig. 1.

Fig. 6 is a sectional view schematically showing the structure of a motor of a comparative example.

Fig. 7 is an exploded perspective view of a motor component according to the embodiment and an enlarged view of a main portion thereof.

Fig. 8 is an exploded rear view of the motor components of the embodiment.

Fig. 9 is a cross-sectional view of section IX-IX of fig. 1.

Fig. 10 is a cross-sectional view taken along line X-X of fig. 1.

Fig. 11 is a cross-sectional view taken along line X-X in fig. 1 to explain a method of manufacturing a motor member according to an embodiment.

Detailed Description

(embodiment mode)

Hereinafter, a motor component, a motor, and a method of manufacturing the motor component according to the embodiments will be described with reference to the drawings. However, the following embodiments are only one of various embodiments of the present disclosure. If the object of the present disclosure can be achieved, the following embodiments can be variously modified according to design and the like. The drawings described in the following embodiments are schematic drawings, and the ratio of the size and thickness of each component in the drawings does not necessarily reflect the actual dimensional ratio.

(1) Summary of the invention

Fig. 1 is a rear view of a motor part 100 of the embodiment. Fig. 2 is a front view of the motor part 100 of the embodiment. Fig. 3 is a sectional view schematically showing the structure of the motor 1 including the motor member 100 of the embodiment. As shown in fig. 1, the motor component 100 of the present embodiment includes a capacitor 6 and a ground terminal 7. The capacitor 6 includes a capacitor element 63 (see fig. 7) and a lead terminal 61. Fig. 7 is an exploded perspective view of a motor component according to the embodiment and an enlarged view of a main part thereof. The lead terminal 61 is electrically connected to the capacitor element 63. The ground terminal 7 is electrically connected to ground and the lead terminal 61. The ground terminal 7 holds the lead terminal 61 therebetween, and thereby electrically connects the lead terminal 61 while holding the lead terminal 61.

According to the above configuration, the lead terminal 61 and the ground terminal 7 can be mechanically and electrically connected without soldering or welding. Therefore, for example, there are advantages in that the mechanical connection and the electrical connection of the lead terminal 61 and the ground terminal 7 are completed in a short time, compared with the case where the lead terminal 61 and the ground terminal 7 are soldered and welded.

As shown in fig. 1 to 3, the motor component 100 of the present embodiment is used for a motor 1 including a motor main body 2, a holding member 4, and a frame 3. The motor main body 2 has a stator 21 and a rotor 22. The rotor 22 includes a rotation shaft 221. The rotational axis 221 includes a shaft center (an imaginary axis passing through the center of the rotational axis 221. Illustrated by a one-dot chain line 2210 in FIG. 3). The rotation shaft 221 rotates about the axial center with respect to the stator 21. The holding member 4 has a 1 st surface 41 that is a surface on one side in the axial direction of the rotating shaft 221 and a 2 nd surface 42 on the opposite side of the 1 st surface 41. The holding member 4 holds the bearing 11 between the 1 st surface 41 and the predetermined member 90, and the bearing 11 holds the rotation shaft 221 rotatably. The frame 3 holds the holding member 4 from the outside in the radial direction of the rotating shaft 221. The motor part 100 includes a holding member 4. At least one of the 1 st surface 41 and the 2 nd surface 42 of the holding member 4 has inclined surfaces S1 and S2 (surfaces marked with dots in fig. 1 and 2) in a region around the bearing 11 when viewed from the axial direction of the rotary shaft 221. The inclined surfaces S1 and S2 are inclined with respect to a plane orthogonal to the axial direction of the rotating shaft 221. The inclined surfaces S1 and S2 are inclined so as to be axially away from the bearing 11 as they approach radially outward of the rotary shaft 221.

According to the above configuration, when the reaction force applied from the holding member 4 to the bearing 11 is generated in accordance with the force applied from the predetermined member 90 to the bearing 11, the reaction force becomes larger than in the case where the holding member 4 does not have the inclined surfaces S1 and S2. That is, since the force for holding the bearing 11 is increased, the possibility of the bearing 11 idling can be reduced.

The motor component 100 may include at least the capacitor 6 and the ground terminal 7. For example, the motor part 100 may not include the holding member 4. Conversely, the motor component 100 may be provided with the holding member 4. The holding member 4 holds the ground terminal 7.

(2) Detailed description of the invention

The use of the motor 1 is not particularly limited. In the present embodiment, a case where the motor 1 is mounted on an automobile and drives a hydraulic pump of a hydraulic brake will be described as an example. The predetermined member 90 shown in fig. 3 is a constituent part of the hydraulic pump. That is, the predetermined member 90 is an external component of the motor 1.

The motor 1 is an electric motor. As shown in fig. 3, the motor 1 includes a motor main body 2, a frame 3, a holding member 4, a 1 st bearing (bearing 11), a 2 nd bearing 12, a commutator 13, a plurality of (two in the present embodiment) brushes 14 (see fig. 1), and a plurality of (two in the present embodiment) springs 15 (see fig. 1). As shown in fig. 1, the motor 1 further includes a plurality of (two in the present embodiment) capacitors 6, a ground terminal 7, a plurality of (two in the present embodiment) power supply terminals 81, and a wiring 82.

In the following description, the front-back and up-down directions are defined by the directions indicated by arrows in fig. 3. That is, the direction in which the predetermined member 90 and the motor 1 are aligned is defined as the front-rear direction, the predetermined member 90 side is defined as the front when viewed from the motor 1, and the motor 1 side is defined as the rear when viewed from the predetermined member 90. In addition, a direction orthogonal to the front-rear direction is defined as a vertical direction. However, the above specification is not intended to limit the direction of use of the motor 1.

As shown in fig. 3, the motor main body 2 includes a stator 21 and a rotor 22. The stator 21 has a permanent magnet. The stator 21 surrounds the rotor 22. The rotor 22 has a rotation shaft 221 and a rotor core 222. The rotor core 222 has a through hole through which the rotation shaft 221 passes. The rotor core 222 rotates together with the rotation shaft 221. The rotor 22 also has coils (not shown) surrounding the rotor core 222. The rotor 22 is rotated relative to the stator 21 by electromagnetic interaction of the coils and permanent magnets (not shown).

The frame 3 is formed of metal. The frame 3 has conductivity. The frame 3 has a bottomed cylindrical shape. The frame 3 has a bottom wall 31 and side walls 32. The bottom wall 31 is shaped like a disk. The bottom wall 31 has a bearing holding portion 311 that holds the 2 nd bearing 12. The bearing holding portion 311 has a cylindrical shape. The 2 nd bearing 12 is inserted inside the bearing holding portion 311. The side wall 32 is cylindrical in shape. The side wall 32 extends from the peripheral edge of the bottom wall 31 in the thickness direction of the bottom wall 31. The side wall 32 has an opening 320 at one end (front end) opposite to the bottom wall 31 side. The holding member 4 covers the opening 320. A housing that houses the motor main body 2 is formed by the frame 3 and the holding member 4.

The holding member 4 is shaped like a disk. The radial direction of the holding member 4 is along the radial direction of the rotation shaft 221 as viewed from the front-rear direction. The holding member 4 has a 1 st face 41 (front face) and a 2 nd face 42 (rear face). The holding member 4 has a recess 410 in the center of the 1 st surface 41. A bearing 11 is inserted into the recess 410. The holding member 4 has a through hole 43 in the bottom surface of the recess 410. The through hole 43 is penetrated by the rotation shaft 221. The holding member 4 has a recess 420 in the center of the 2 nd surface 42. The commutator 13 is inserted into the recess 420. The through hole 43 penetrates the bottom surface of the recess 420.

The 1 st bearing 11 and the 2 nd bearing 12 hold the rotation shaft 221 to be rotatable. The axial direction of the rotary shaft 221 is along the front-rear direction. A commutator 13 is coupled to the rotating shaft 221. The commutator 13 is cylindrical in shape. The axial direction of the commutator 13 coincides with the axial direction of the rotary shaft 221. The commutator 13 rotates together with the rotating shaft 221. The commutator 13 is electrically connected to a coil (not shown) of the motor main body 2.

As shown in fig. 1, each of the two brushes 14 has a rectangular parallelepiped shape. The longitudinal direction of each brush 14 is along the radial direction of the holding member 4 when viewed from the axial direction of the rotating shaft 221. Each brush 14 is disposed at a position contacting the commutator 13 in the radial direction of the commutator 13.

The plurality of (two) springs 15 correspond to the plurality of (two) brushes 14 one by one, respectively. Each spring 15 presses the corresponding brush 14 toward the commutator 13. Thereby, the contact pressure between each brush 14 and the commutator 13 is ensured. Each spring 15 is a torsion coil spring. Each spring 15 is held by the holding member 4.

The holding member 4 has electrical insulation. The holding member 4 is formed of synthetic resin. The holding member 4 has a base 40. The base 40 is provided over substantially the entire holding member 4 when viewed from the front-rear direction.

The holding member 4 includes a plurality of (two in the present embodiment) brush boxes 44, a boss portion 5, and a terminal block 45 (see fig. 2). The plurality of brush boxes 44, the boss portion 5, and the terminal block 45 are formed integrally with the base 40. A plurality of brush boxes 44 and a boss portion 5 protrude from the rear surface of the base portion 40. The terminal block 45 protrudes from the front surface of the base 40. The plurality of brush boxes 44 correspond to the plurality of brushes 14 one by one, respectively. Each brush box 44 houses a corresponding brush 14. The boss portion 5 holds a plurality of capacitors 6. The boss portion 5 holds the ground terminal 7. The terminal block 45 holds a plurality of power supply terminals 81.

The ground terminal 7 is electrically connected to ground. In the present embodiment, the frame 3 functions as a ground. That is, the ground terminal 7 is electrically connected to the frame 3. The ground terminal 7 is disposed near the outer edge of the holding member 4. The holding member 4 is attached to the inside of the side wall 32 of the frame 3 by press fitting. As shown in fig. 3, the outer edge of the holding member 4 contacts the inner edge of the side wall 32 of the frame 3, whereby the ground terminal 7 contacts the inner edge of the side wall 32 of the frame 3 as shown in fig. 11. Fig. 11 is a cross-sectional view taken along line X-X in fig. 1 to explain a method of manufacturing a motor member according to an embodiment. Thereby, the ground terminal 7 is electrically connected to the frame 3. In addition, the holding member 4 is held by the frame 3 in a state where the outer edge of the holding member 4 is in contact with the inner edge of the side wall 32 of the frame 3.

The plurality of (two) capacitors 6 correspond one-to-one to the plurality of (two) power supply terminals 81. Each capacitor 6 is electrically connected to the corresponding power supply terminal 81. In addition, the plurality of (two) power supply terminals 81 correspond one-to-one to the plurality of (two) brushes 14. Each power supply terminal 81 is electrically connected to a corresponding brush 14.

Each capacitor 6 has two lead terminals 61 and 62 (see fig. 7). The lead terminal 61 is electrically connected to the ground terminal 7. That is, the lead terminal 61 is electrically connected to the ground (the frame 3) via the ground terminal 7. The other lead terminal 62 is electrically connected to the corresponding power terminal 81 via a wiring 82. The power supply terminal 81 is electrically connected to a power supply. The power supply terminal 81 is electrically connected to the corresponding brush 14 via a wiring 82. The power supply supplies current to the coil of the motor main body 2 via the power supply terminal 81, the wiring 82, the brush 14, and the commutator 13.

(3) Shape of the holding member

The shape of the holding member 4 will be described in more detail below.

As described above, the holding member 4 has the inclined surfaces S1 and S2 (faces marked with dots in fig. 1 and 2) on at least one of the 1 st surface 41 (front surface) and the 2 nd surface 42 (rear surface). In the present embodiment, both the 1 st surface 41 and the 2 nd surface 42 have inclined surfaces. Hereinafter, the inclined surface of the 1 st surface 41 is referred to as an inclined surface S1, and the inclined surface of the 2 nd surface 42 is referred to as an inclined surface S2.

The inclined surface S1 is provided at the base portion 40 of the holding member 4. The inclined surface S2 is provided to the base 40 and the two brush boxes 44. As shown in fig. 3, the inclined surfaces S1 and S2 are inclined so as to be farther from the bearing 11 in the axial direction (front-rear direction) of the rotating shaft 221, as they go further outward in the radial direction of the rotating shaft 221. That is, the outer region of the inclined surfaces S1 and S2 in the radial direction of the rotating shaft 221 is located rearward of the inner region.

The 1 st surface 41 and the 2 nd surface 42 have a 1 st region (recesses 410 and 420) and a 2 nd region around the 1 st region, respectively, which overlap with the bearing 11 when viewed from the axial direction (front-rear direction) of the rotary shaft 221. In each of the 1 st surface 41 and the 2 nd surface 42, the 2 nd region is the entire region other than the 1 st region. The inclined surfaces S1 and S2 are provided in the 2 nd region. In the 1 st surface 41, the inclined surface S1 is provided in at least 30% of the 2 nd region (see fig. 2). The 2 nd surface 42 is provided with the inclined surface S2 (see fig. 1) in at least 50% of the 2 nd area.

As shown in fig. 2, the holding member 4 has a plurality of ribs 46 and a 1 st annular portion 47. The 1 st annular portion 47 and the plurality of ribs 46 protrude from the front surface of the base 40. The 1 st annular portion 47 is an annular protrusion. The 1 st annular portion 47 protrudes forward from a portion near the peripheral edge of the base 40. The plurality of ribs 46 are provided between the 1 st annular portion 47 and the recessed portion 410. The plurality of ribs 46 are net-shaped when viewed from the front. By providing the 1 st annular portion 47 and the plurality of ribs 46, the strength of the holding member 4 is ensured. The front surface of the 1 st annular portion 47 and the front surfaces of the plurality of ribs 46 are parallel to a plane orthogonal to the axial direction of the rotation shaft 221. The front surface of the 1 st annular portion 47 and the front surfaces of the plurality of ribs 46 are located on the same plane. Further, the front surface of the 1 st annular portion 47 and the front surfaces of the plurality of ribs 46 may not be on the same plane.

As shown in fig. 1 and 3, the holding member 4 has a 2 nd annular portion 48. The 2 nd annular portion 48 is an annular protrusion. The 2 nd annular portion 48 protrudes rearward from the periphery of the base portion 40. At least a part of the outer peripheral surface of the 2 nd annular portion 48 is in contact with the inner peripheral surface of the side wall 32 of the frame 3.

Fig. 4 is a cross-sectional view of section IV-IV of fig. 1. Fig. 4 is a cross-sectional view showing a cross-section including the axial center of the rotating shaft 221. At least one of the 1 st surface 41 and the 2 nd surface 42 has an inclined surface S1 (or S2) in a region of 1/2 or more of the region from the bearing 11 to the frame 3 (side wall 32) in the cross section. The "region from the bearing 11 to the frame 3 in the cross section" includes two regions, i.e., a region located above the bearing 11 on the paper plane of fig. 4 (hereinafter referred to as an upper region) and a region located below the bearing 11 on the paper plane of fig. 4 (hereinafter referred to as a lower region). The phrase "having the inclined surface S1 (or S2) in the region of 1/2 or more" means that the inclined surface S1 (or S2) is provided in the region of 1/2 or more of the upper region, the inclined surface S1 (or S2) is provided in the region of 1/2 or more of the lower region, and both of them are satisfied. In fig. 4, the 1 st surface 41 has an inclined surface S1 in a lower region of 1/2 or more. In fig. 4, the 2 nd surface 42 has the inclined surface S2 in an area of 1/2 or more in each of the upper area and the lower area.

In the holding member 4, the inclined surface S1 (or S2) is provided on both sides across the rotating shaft 221 when viewed from the axial direction of the rotating shaft 221. Here, when viewed in the axial direction of the rotating shaft 221, one of the two sides across the rotating shaft 221 corresponds to an upper region, and the other corresponds to a lower region. The holding member 4 has inclined surfaces S1 and S2 in an upper region and inclined surfaces S1 and S2 in a lower region. Further, the case where the inclined surface S1 is provided in the upper region and the inclined surface S2 is provided in the lower region, and the case where the inclined surface S2 is provided in the upper region and the inclined surface S1 is provided in the lower region are also referred to as "the inclined surfaces S1 (or S2) are provided on both sides of the rotating shaft 221 in the holding member 4 when viewed in the axial direction of the rotating shaft 221". The case where the inclined surface S1 is provided in the upper region and the lower region, and the case where the inclined surface S2 is provided in the upper region and the lower region are also referred to as "the inclined surface S1 (or S2) is provided on both sides of the rotating shaft 221 in the holding member 4 when viewed in the axial direction of the rotating shaft 221".

In the cross section of fig. 4, the inclined surfaces S1 and S2 are linear. The inclined surface S1 and the inclined surface S2 existing in a region overlapping with the inclined surface S1 in the thickness direction of the holding member 4 are parallel to each other in the cross section of fig. 4. In the present disclosure, the term "parallel" is not limited to a strict parallel, but includes the case where an error is present within an allowable range.

Fig. 5 is a cross-sectional view of the V-V section of fig. 1. Fig. 5 is a sectional view showing a cross section including the axial center of the rotating shaft 221. In the 1 st surface 41, an inclined surface S1 is provided in a region overlapping the brush box 44 in the axial direction of the rotating shaft 221. The 2 nd face 42 includes a rear surface of the brush box 44, and an inclined surface S2 is provided on at least a portion of the rear surface of the brush box 44. The longitudinal direction of the brush box 44 intersects a plane orthogonal to the axial direction of the rotary shaft 221. The brushes 14 are arranged in an oblique direction along the shape of the brush box 44. That is, the longitudinal direction of the brush 14 intersects a plane orthogonal to the axial direction of the rotating shaft 221.

The plurality of brush boxes 44 are arranged along the radial direction of the holding member 4, respectively, and thus the strength of the holding member 4 is ensured. Further, since the two brush boxes 44 are disposed on both sides with the rotation shaft 221 interposed therebetween, higher strength of the holding member 4 is ensured.

Here, as shown in fig. 3, the bearing 11 is held between the 1 st surface 41 of the holding member 4 and a predetermined member 90. More specifically, a backward force (contact pressure) is applied to the bearing 11 from the predetermined member 90, and accordingly, a forward reaction force (contact pressure) is applied to the bearing 11 from the 1 st surface 41. Thus, the bearing 11 is sandwiched between the 1 st surface 41 and the predetermined member 90 to be held. If the reaction force applied to the bearing 11 by the self-holding member 4 is insufficient, the bearing 11 may run idle.

In fig. 3, a backward force is applied to the holding member 4 from the predetermined member 90 via the bearing 11 (refer to an arrow Y1), whereby the self-holding member 4 applies a force to the frame 3 (refer to an arrow Y2). The force applied to the frame 3 by the self-holding member 4 is a force in a direction of pushing the frame 3 radially outward of the rotation shaft 221. On the other hand, since the holding member 4 is pressed into the frame 3, a force is applied from the frame 3 to the holding member 4 (see arrow Y3), and the force causes the holding member 4 to apply a forward force to the bearing 11 (see arrow Y4). Further, although there may be forces in directions other than the directions indicated by the arrows Y1 to Y4, the forces generated by the motor 1 are only mainly indicated by the arrows Y1 to Y4 in fig. 3 (and fig. 6).

Here, fig. 6 illustrates a motor 1P of a comparative example. The shape of the holding member 4P of the motor 1P is different from the shape of the holding member 4 of the motor 1 of the embodiment. The other structure of the motor 1P is the same as that of the motor 1.

The holding member 4P has a flat plate shape. The 1 st surface 41 and the 2 nd surface 42 of the holding member 4P are parallel to a plane orthogonal to the axial direction of the rotation shaft 221. In the holding member 4P of such a shape, the direction of the rearward force (refer to arrow Y1) applied to the holding member 4 from the predetermined member 90 via the bearing 11 and the direction of the main force (refer to arrow Y2) applied to the frame 3 from the holding member 4 are orthogonal to each other. Therefore, the former force (see arrow Y1) is hardly converted into the latter force (see arrow Y2), and the latter force (see arrow Y2) becomes relatively small. Similarly, the force (see arrow Y3) applied from the frame 3 to the holding member 4 is hardly converted into the force (see arrow Y4) applied from the holding member 4 to the bearing 11, and the latter force (see arrow Y4) becomes relatively small. Therefore, there is a possibility that: the force (refer to arrow Y4) applied to the bearing 11 by the self-holding member 4 becomes insufficient, causing the idling of the bearing 11.

In contrast, the holding member 4 (see fig. 3) of the embodiment has the inclined surfaces S1 and S2. The holding member 4 has a length in the oblique direction along the inclined surfaces S1, S2. In the holding member 4 having such a shape, the force (see arrow Y4 in fig. 3) applied to the bearing 11 from the holding member 4 becomes relatively large. This can reduce the possibility of the bearing 11 idling, as compared with the motor 1P of the comparative example. Since the holding member 4 has the inclined surfaces S1 and S2, it is easily deformed (easily warped) by a force from the frame 3 (a force along the radial direction of the holding member 4). The holding member 4 is deformed into a shape shown by a two-dot chain line Z1 in fig. 3, for example. The force (see arrow Y4) applied to the bearing 11 from the holding member 4 can be made relatively large by deforming the holding member 4.

In the comparative example, it is also considered that the force (see arrow Y4 in fig. 6) applied from the holding member 4 to the bearing 11 is increased by increasing the thickness of the base portion 40 of the holding member 4P. However, if the thickness is increased, the material cost of the holding member 4P increases. Further, if the thickness is increased, the deformation of the holding member 4P may be increased. On the other hand, in the present embodiment, the thickness of the base portion 40 of the holding member 4 can be made relatively small.

As a result of analysis by the simulation model of the motors 1 and 1P, the force (see arrow Y4 in fig. 3) applied to the bearing 11 by the self-holding member 4 in the motor 1 increases by 112% as compared with the case where the thickness of the base 40 is increased in the motor 1P.

In fig. 3, a component (see arrow Y2) of the force applied to the frame 3 from the holding member 4 of the embodiment in the direction along the inclined surfaces S1 and S2 is larger than a component (see arrow Y5) in the radial direction of the rotation shaft 221. Therefore, the force with which the holding member 4 holds the bearing 11 can be made large. The comparison of the magnitude relation between the former force (see arrow Y2) and the latter force (see arrow Y5) may be performed by measuring the force by attaching a sensor such as a pressure sensor to the actual motor 1, or may be performed by analyzing a simulation model of the motor 1.

(4) Capacitor and ground terminal

Hereinafter, the ground terminal 7 and the plurality of (two) capacitors 6 will be described in more detail.

The plurality of capacitors 6 and the ground terminal 7 are attached to the holding member 4 from one surface (2 nd surface 42) of the 1 st surface 41 and the 2 nd surface 42 of the holding member 4.

Fig. 7 is an exploded perspective view of a motor component of the embodiment and an enlarged view of a main part thereof. As shown in fig. 7, each capacitor 6 has two lead terminals 61, 62, a capacitor element 63, and a capacitor main body 64.

The capacitor 6 is, for example, an electrolytic capacitor. The capacitor element 63 has an anode body, a cathode body, and a separator. The anode body includes a metal foil containing a valve metal such as aluminum, tantalum, or niobium, and a dielectric layer formed on a surface of the metal foil. The cathode body includes a metal foil such as aluminum. The separator is interposed between the anode and cathode bodies, and holds the electrolyte. The anode body, the cathode body, and the separator are respectively formed in a sheet shape. The anode, cathode and separator are wound in a roll shape in an overlapped state.

One lead terminal 61 of the two lead terminals 61, 62 is electrically connected to a cathode body of the capacitor element 63, and the other lead terminal 62 is electrically connected to an anode body of the capacitor element 63.

The capacitor body 64 houses the capacitor element 63. The two lead terminals 61, 62 protrude from the capacitor main body 64.

The ground terminal 7 is made of, for example, a metal plate. The ground terminal 7 is formed by bending, punching, or the like a metal plate. The ground terminal 7 has a 1 st portion 71, a 2 nd portion 72, a 3 rd portion 73, and a plurality of (two in the present embodiment) restriction structures 74.

The 2 nd portion 72 has a plate shape having a rectangular shape in plan view. The 1 st portion 71 is connected to the 1 st end of the 2 nd portion 72 in the lateral direction. The 2 nd portion 73 is connected to the 2 nd end of the 2 nd portion 72 in the lateral direction. The 1 st portion 71 and the 3 rd portion 73 protrude from the 2 nd portion 72 to one side in the thickness direction of the 2 nd portion 72. That is, the ground terminal 7 is formed in a U shape in side view. The two restricting structures 74 are protrusions provided on the side surfaces of the 3 rd portion 73 when viewed in the thickness direction of the 3 rd portion 73. Each of the regulating structures 74 has a substantially right-angled triangle shape when viewed in the thickness direction of the 3 rd portion 73.

The 3 rd site 73 has a plurality of (two in the present embodiment) groove portions 730 (1 st groove portions). The plurality of groove portions 730 are grooves recessed toward the 2 nd portion 72 side from the end of the 3 rd portion 73 opposite to the 2 nd portion 72 side. When the ground terminal 7 is attached to the holding member 4, the plurality of groove portions 730 are aligned in the radial direction of the holding member 4. The plurality of grooves 730 correspond one-to-one to the plurality of capacitors 6. Each groove portion 730 is penetrated by the lead terminal 61 of the corresponding capacitor 6. The lead terminal 61 of each capacitor 6 is sandwiched between the two inner side surfaces 731 of the groove portion 730 (see fig. 9). Fig. 9 is a cross-sectional view of section IX-IX of fig. 1. That is, the ground terminal 7 holds the lead terminals 61 of the plurality of capacitors 6 by sandwiching the lead terminals 61 of the plurality of capacitors 6. The ground terminal 7 is electrically connected to the lead terminal 61 of each of the plurality of capacitors 6.

In fig. 7, the boss portion 5 of the holding member 4 protrudes rearward from the rear surface of the base portion 40. The boss portion 5 is provided near the periphery of the base portion 40. The boss portion 5 has a plurality of (two in the present embodiment) 1 st, 2 nd, and 3 rd housing recess portions 51, 52, and 53. The 2 nd housing recess 52 and the two 1 st housing recesses 51 are recesses provided on the rear surface (tip end) of the boss portion 5. The 3 rd receiving recess 53 is a recess provided on a side surface of the boss portion 5. More specifically, the 3 rd receiving recess 53 is provided on the outer surface of the boss portion 5 in the radial direction of the holding member 4.

The plurality of (two) 1 st receiving recesses 51 correspond one-to-one to the plurality of (two) capacitors 6. The holding member 4 accommodates the capacitor body 64 of the corresponding capacitor 6 in each 1 st accommodation recess 51. That is, the holding member 4 holds the capacitor main body 64.

The 2 nd receiving recess 52 receives the 3 rd site 73 of the ground terminal 7. The 3 rd receiving recess 53 receives the 1 st site 71 of the ground terminal 7.

The holding member 4 has two temporary holding structures 54. The two temporary holding structures 54 correspond one-to-one to the two capacitors 6. Each temporary holding structure 54 holds the lead terminal 61 of the corresponding capacitor 6. More specifically, each temporary holding structure 54 holds the lead terminal 61 in a state where the lead terminal 61 is not held by the ground terminal 7. Fig. 8 is an exploded rear view of the motor components of the embodiment. As shown in fig. 7 and 8, each of the two temporary holding structures 54 includes a plurality of (two in the present embodiment) 2 nd groove portions 540 and a plurality of (4 in the present embodiment) protrusions 541.

Each 2 nd groove part 540 is a groove recessed forward from the rear surface of the boss part 5. In each temporary holding structure 54, two 2 nd groove portions 540 are aligned in the radial direction of the holding member 4. In each temporary holding structure 54, one of the two 2 nd groove portions 540 connects the 1 st accommodation recess 51 and the 2 nd accommodation recess 52. The other of the two 2 nd groove portions 540 connects the 2 nd housing recess 52 and the 3 rd housing recess 53. The capacitor main body 64 is housed in the 1 st housing recess 51. Lead terminals 61 extending from capacitor main body 64 pass through two 2 nd groove portions 540 of corresponding temporary holding structures 54. In this way, the temporary holding structure 54 holds the lead terminals 61 at a plurality of places (two 2 nd groove portions 540) in a state where the lead terminals 61 are not held by the ground terminal 7. A portion 611 (see fig. 8) of the lead terminal 61 disposed between the two 2 nd groove portions 540 is a portion in contact with the ground terminal 7.

The 2 nd groove 540 has a U-shape when viewed from the radial direction of the holding member 4. Each of the 2 nd groove parts 540 has chamfered parts 5400 at two corner parts of the rear end thereof. The boss portion 5 is chamfered at two chamfered portions 5400. That is, in each chamfered portion 5400, the inner surface of the 2 nd groove 540 is inclined so that the region closer to the bottom surface of the 2 nd groove 540 is located on the center side of the 2 nd groove 540.

The two protrusions 541 protrude from the inner surface of each 2 nd groove 540 toward the center of the 2 nd groove 540. The two protrusions 541 are opposite in a protruding direction of each other. As shown in fig. 8, the lead terminal 61 is sandwiched by two protrusions 541.

The boss portion 5 further has a plurality of (two in the present embodiment) 4 th accommodation recesses 55. The plurality of 4 th accommodating recesses 55 are recesses provided on the rear surface of the boss portion 5. The plurality of 4 th accommodating recesses 55 correspond to the plurality of 1 st accommodating recesses 51 one by one, respectively. Each 4 th housing recess 55 is continuous with the corresponding 1 st housing recess 51. The plurality of 4 th accommodating recesses 55 correspond to the plurality of capacitors 6 one by one. Each 4 th accommodation recess 55 is penetrated by a lead terminal 62 of the corresponding capacitor 6. Thereby, the lead terminal 62 is held.

Fig. 9 is a cross-sectional view of section IX-IX of fig. 1. As shown in fig. 9, the 3 rd site 73 of the ground terminal 7 is inserted into the 2 nd receiving recess 52 of the boss portion 5 with the corresponding lead terminal 61 held by each temporary holding structure 54 (the 2 nd groove 540 shown in fig. 8). Each lead terminal 61 is inserted into a corresponding groove portion 730 of the two groove portions 730 of the ground terminal 7. Here, the two groove portions 730 have two inner side surfaces 731 facing each other. The ground terminal 7 sandwiches the lead terminal 61 between the two inner side surfaces 731. Thereby, the lead terminal 61 is held, and the ground terminal 7 is electrically connected to the lead terminal 61.

The two restricting structures 74 of the ground terminal 7 contact the inner side surface of the 2 nd accommodating recess 52. Thereby, the two regulating structures 74 function as a retaining member for the ground terminal 7. In other words, the two restriction structures 74 restrict the grounding terminal 7 from being separated from the lead terminal 61. In addition, as for the structure for preventing the ground terminal 7 from coming off, the holding member 4 may have this structure, or both the ground terminal 7 and the holding member 4 may have this structure. For example, as shown by a two-dot chain line 520 in fig. 9, the holding member 4 may have a projection (restricting structure) that projects from the inner surface of the 2 nd accommodating recess 52 and contacts the ground terminal 7.

(5) Manufacturing method

Next, an example of a method for manufacturing the motor component 100 according to the present embodiment will be described with reference to fig. 7 to 11.

The motor part 100 described herein includes a plurality of capacitors 6 and a ground terminal 7. In the finished motor component 100, the plurality of capacitors 6 are electrically connected to the ground terminal 7. The motor component 100 is manufactured by mounting a plurality of capacitors 6 and a ground terminal 7 on the holding member 4. The method of manufacturing the motor component 100 of the present embodiment includes the 1 st step and the 2 nd step after the 1 st step. In the first step 1, the lead terminal 61 is held by the holding member 4. In the step 2, the lead terminal 61 is sandwiched by the ground terminal 7, whereby the ground terminal 7 holds the lead terminal 61 and the ground terminal 7 is electrically connected to the lead terminal 61.

More specifically, in the 1 st step, as shown in fig. 7 and 8, the capacitor body 64 is inserted into the 1 st housing recess 51. The lead terminal 61 is held by the temporary holding structure 54 (two 2 nd groove parts 540). Thereby, the lead terminal 61 is positioned. In addition, the lead terminal 62 passes through the 4 th accommodation recess 55. The two capacitors 6 and the lead terminals 61 of the two capacitors 6 are thus temporarily held by the boss portion 5.

In the 2 nd step after the 1 st step, first, as shown in fig. 9 and 10, the ground terminal 7 is attached to the holding member 4. Fig. 10 is a cross-sectional view taken along line X-X of fig. 1. That is, the 3 rd portion 73 is inserted into the 2 nd receiving recess 52, and the 1 st portion 71 is inserted into the 3 rd receiving recess 53. At this time, the two lead terminals 61 are sandwiched between the two groove portions 730. Thereby, the two lead terminals 61 are held by the ground terminal 7, and the ground terminal 7 is electrically connected to the two lead terminals 61. Since the ground terminal 7 has two groove portions 730, 1 ground terminal 7 is attached to the holding member 4, whereby the two lead terminals 61 can be collectively held.

Fig. 11 is a cross-sectional view taken along line X-X of fig. 1, and illustrates a method of manufacturing a motor component according to an embodiment. The method of manufacturing the motor member 100 of the present embodiment further includes the 3 rd step. In step 3, as shown in fig. 11, the holding member 4 is attached to the inside of the frame 3. Thereby, the ground terminal 7 is in contact with the frame 3, and the ground terminal 7 is electrically connected to the frame 3 (ground). In addition, the 1 st portion 71 of the ground terminal 7 is pressed by the frame 3 and elastically deformed in the 3 rd step. The contact pressure of the ground terminal 7 and the frame 3 is ensured by the elasticity of the 1 st site 71.

According to the above, the motor part 100 is manufactured. Since each capacitor 6 and the ground terminal 7 are separately and individually attached to the holding member 4, attachment is easier than in the case where the ground terminal 7 and two capacitors 6 are attached to the holding member 4 after being connected to each other. That is, since each capacitor 6 and the ground terminal 7 are small as compared with a structure in which the ground terminal 7 and two capacitors 6 are integrally connected, attachment to the holding member 4 is easy. Further, the structure of the holding member 4 (the two 1 st housing recess 51, the 2 nd housing recess 52, and the 3 rd housing recess 53) allows the capacitors 6 and the ground terminal 7 to be positioned, and thus the mounting is easy.

(modification 1)

Hereinafter, the motor component 100 and the motor 1 according to modification 1 will be described with reference to fig. 3. The same reference numerals are given to the same structures as those of the embodiment, and the description thereof is omitted.

The inclined surface S1 (or S2) may have a curved shape in a predetermined cross section including the axial center of the rotating shaft 221. For example, the predetermined cross section is the cross section shown in fig. 3, and the shape of the base portion 40 of the holding member 4 may be an arc shape as shown by a two-dot chain line Z1 in fig. 3. The inclined surfaces S1 and S2 in this case are arc-shaped. More specifically, in the predetermined cross section, the inclined surfaces S1 and S2 are formed in an arc shape protruding toward the opposite side of the bearing 11 in the axial direction of the rotary shaft 221. That is, in the predetermined cross section, the inclined surfaces S1 and S2 are formed in such a shape that the portion between the bearing 11 and the frame 3 in the planar base portion 40 is bent rearward.

According to modification 1, since the inclined surfaces S1 and S2 are arc-shaped, the component of the force applied from the holding member 4 to the bearing 11 in the axial direction of the rotary shaft 221 may be larger than that in the embodiment. That is, the force holding the bearing 11 may be increased.

In the case where the inclined surface S1 is present in a certain region and the inclined surface S2 is present in a region overlapping with the inclined surface S1 in the thickness direction of the holding member 4, one of the inclined surfaces S1 and S2 may be curved and the other may be linear in the predetermined cross section.

(other modification of the embodiment)

Other modifications of the embodiment will be described below. The following modifications can also be realized by appropriate combinations. The following modifications can be implemented by appropriately combining with the above-described modifications.

The motor 1 is a brush motor, but the motor 1 may be a brushless motor.

The number of components in the embodiment may be changed as appropriate. For example, the number of capacitors 6 and the number of brushes 14 may be changed as appropriate. The motor 1 may include a plurality of ground terminals 7. Each ground terminal 7 may hold lead terminal 61 of 1 capacitor 6, or may hold lead terminals 61 of two or more capacitors 6.

The ground terminal 7 may not solely sandwich the lead terminal 61, but may sandwich the lead terminal 61 with another member. For example, the ground terminal 7 may sandwich the lead terminal 61 with the holding member 4.

The lead terminal 61 may be a covered wire. Further, the lead terminal 61 may be inserted into the groove portion 730 of the ground terminal 7, whereby the lead terminal 61 may be peeled off from the package. Namely, the ground terminal 7 can also function as a wire tap (japanese: 124561252463124124124124881257950.

The ground terminal 7 may be a quick-connect terminal. The quick-connect terminal includes an elastic portion, and the lead terminal 61 is inserted into the quick-connect terminal while elastically deforming the elastic portion, and the detachment of the lead terminal 61 is suppressed by the elasticity of the elastic portion.

The ground terminal 7 may be a crimp terminal.

The predetermined member 90 may be the structure of the motor 1. The predetermined member 90, which is a structure of the motor 1, may transmit a force received from a structure (a hydraulic pump or the like) outside the motor 1 to the bearing 11.

The inclined surface S1 of the 1 st surface 41 and the inclined surface S2 of the 2 nd surface 42 may not be parallel to each other.

(conclusion)

The following embodiments are disclosed in accordance with the embodiments and the like described above.

A motor component (100) according to claim 1 is provided with a capacitor (6) and a ground terminal (7). The capacitor (6) has a capacitor element (63) and lead terminals (61). The lead terminal (61) is electrically connected to the capacitor element (63). The ground terminal (7) is electrically connected to the ground (frame 3) and the lead terminal (61). The ground terminal (7) holds the lead terminal (61) therebetween, thereby electrically connecting the lead terminal (61) to the ground terminal (61).

According to the above configuration, the lead terminal (61) and the ground terminal (7) can be mechanically and electrically connected without soldering. Therefore, for example, compared with the case of soldering the lead terminal (61) and the ground terminal (7), there are advantages that the lead terminal (61) and the ground terminal (7) are mechanically connected and the electrical connection is completed in a short time.

The motor component (100) according to claim 2 is further provided with a holding member (4) in addition to the motor component (1). The holding member (4) holds the ground terminal (7).

According to the above configuration, the ground terminal (7) can be assembled to the holding member (4).

In addition, in the motor part (100) of claim 3, in addition to claim 2, the holding member (4) has a temporary holding structure (54). The temporary holding structure (54) holds the lead terminal (61) in a state where the lead terminal (61) is not held by the ground terminal (7).

According to the above configuration, the lead terminal (61) is held by the temporary holding structure (54), thereby facilitating alignment between the lead terminal (61) and the ground terminal (7).

In addition, in a motor component (100) according to claim 4, in addition to claim 3, the temporary holding structure (54) holds the lead terminals (61) at a plurality of locations in a state where the lead terminals (61) are not held by the ground terminal (7).

According to the above configuration, the possibility of displacement of the lead terminals (61) can be reduced as compared with the case where the temporary holding structure (54) holds the lead terminals (61) at 1 place.

In addition, in the motor component (100) according to claim 5, the capacitor (6) further includes a capacitor main body (64) in addition to any one of the embodiments 2 to 4. The capacitor body (64) houses a capacitor element (63). The holding member (4) holds the capacitor body (64).

According to the above configuration, the possibility of displacement of the capacitor (6) can be reduced.

In addition, in the motor component (100) according to claim 6, in addition to any one of the 2 nd to 5 th aspects, at least one of the ground terminal (7) and the holding member (4) has a regulating structure (74). The restriction structure (74) restricts the grounding terminal (7) from being separated from the lead terminal (61).

According to the above structure, the ground terminal (7) can be fixed.

In addition, in the motor component (100) according to claim 7, in addition to any one of claims 1 to 6, the ground terminal (7) has a groove portion (730). The groove portion (730) has two inner side surfaces (731) facing each other. The ground terminal (7) sandwiches the lead terminal (61) between the two inner side surfaces (731).

According to the above configuration, the possibility of displacement of the lead terminal (61) can be reduced.

In addition, the motor component (100) according to claim 8 is provided with a plurality of capacitors (6) in addition to any one of the embodiments 1 to 7. The ground terminal (7) holds the lead terminal (61) of each of the plurality of capacitors (6) and electrically connects the lead terminal (61) with the lead terminal (61).

According to the above configuration, the lead terminals (61) of the plurality of capacitors (6) can be held by 1 ground terminal (7).

The structure other than that of the embodiment 1 is not essential to the motor part 100, and can be omitted as appropriate.

A motor (1) according to claim 9 includes the motor member (100) according to any one of claims 1 to 8 and a motor main body (2). The motor main body (2) has a stator (21) and a rotor (22). The rotor (22) includes a rotating shaft (221). The rotating shaft (221) rotates relative to the stator (21).

According to the above configuration, the lead terminal (61) and the ground terminal (7) can be mechanically and electrically connected without soldering.

A method for manufacturing a motor component (100) according to claim 10 is a method for manufacturing a motor component (100) that includes a capacitor (6), a ground terminal (7), and a holding member (4). The capacitor (6) has a capacitor element (63) and a lead terminal (61). The lead terminal (61) is electrically connected to the capacitor element (63). The ground terminal (7) is electrically connected to the ground (frame 3) and the lead terminal (61). The holding member (4) holds the grounding terminal (7) and the lead terminal (61). The manufacturing method includes a 1 st step and a 2 nd step after the 1 st step. In the step 1, the lead terminal 61 is held by a holding member 4. In the step 2, the lead terminal 61 is sandwiched by the ground terminal 7, whereby the ground terminal 7 holds the lead terminal 61 and the ground terminal 7 is electrically connected to the lead terminal 61.

According to the above configuration, the lead terminal (61) and the ground terminal (7) can be mechanically and electrically connected without soldering.

The various configurations (including the modifications) of the motor member (100) and the motor (1) according to the embodiment are not limited to the above-described configurations, and can be embodied by a manufacturing method of the motor member (100).

Description of the reference numerals

1. A motor; 2. a motor main body; 3. a frame (ground); 4. a holding member; 5. a boss portion; 6. a capacitor; 7. a ground terminal; 12. a 2 nd bearing; 13. a commutator; 14. an electric brush; 15. a spring; 21. a stator; 22. a rotor; 31. a bottom wall; 32. a side wall; 40. a base; 41. the 1 st surface; 42. the 2 nd surface; 43. a through hole; 44. an electric brush box; 45. a terminal block; 46. a rib; 47. the 1 st annular part; 48. a 2 nd annular part; 51. a 1 st receiving recess; 52. a 2 nd accommodating recess; 53. a 3 rd receiving recess; 54. a temporary holding structure; 55. a 4 th accommodating recess; 61. a lead terminal; 62. a lead terminal; 63. a capacitor element; 64. a capacitor body; 71. position 1; 72. position 2; 73. the 3 rd site; 74. a confinement structure; 81. a power supply terminal; 82. wiring; 90. a predetermined member; 100. a motor component; 221. a rotating shaft; 222. a rotor core; 311. a bearing holding portion; 320. an opening part; 410. a recess; 420. a recess; 520. double-dot chain line; 540. a 2 nd groove part; 541. a protrusion; 520. double-dot chain line; 611. a site; 730. a groove part; 731. an inner side surface; 2210. single-point scribing; 5400. and chamfering the corner.

Claims (10)

1. A motor part, wherein,

the motor member includes:

a capacitor having a capacitor element and a lead terminal electrically connected to the capacitor element; and

a ground terminal electrically connected to ground and the lead terminal,

the ground terminal holds the lead terminal therebetween, and thereby electrically connects the lead terminal to the ground terminal.

2. The motor component of claim 1,

the motor component further includes a holding member that holds the ground terminal.

3. The motor component of claim 2, wherein,

the holding member has a temporary holding structure that holds the lead terminal in a state where the lead terminal is not held by the ground terminal.

4. The motor component of claim 3,

the temporary holding structure holds the lead terminals at a plurality of places in a state where the lead terminals are not held by the ground terminal.

5. The motor part according to any one of claims 2 to 4,

the capacitor also has a capacitor body that houses the capacitor element,

the holding member holds the capacitor main body.

6. The motor part according to any one of claims 2 to 5,

at least one of the ground terminal and the holding member has a restriction structure that restricts the ground terminal from being separated from the lead terminal.

7. The motor part according to any one of claims 1 to 6,

the ground terminal has a groove portion having two inner side surfaces opposed to each other with the lead terminal interposed therebetween.

8. The motor part according to any one of claims 1 to 7,

the motor part is provided with a plurality of the capacitors,

the ground terminal holds the lead terminal of each of the plurality of capacitors and is electrically connected to the lead terminal.

9. A motor, wherein,

the motor includes:

a motor part according to any one of claims 1 to 8; and

a motor body having a stator and a rotor including a rotation shaft rotating with respect to the stator.

10. A method for manufacturing a motor component, comprising a capacitor having a capacitor element and a lead terminal electrically connected to the capacitor element, a ground terminal electrically connected to ground and the lead terminal, and a holding member for holding the ground terminal and the lead terminal, wherein,

the method of manufacturing the motor part includes:

a first step of holding the lead terminal by the holding member; and

and a 2 nd step of, after the 1 st step, electrically connecting the ground terminal and the lead terminal by holding the lead terminal by the ground terminal through the 2 nd step.

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