Motor

Abstract

To provide a motor capable of suppressing deformation of a connection terminal contacted to an external terminal connected to an external device as well as simply executing a frame earth with a simple construction.SOLUTION: A motor 1 of the present invention, comprises: a cylinder-like metal member 6 that includes an open part, and an inner peripheral surface 62 that forms the open part in a shaft line x direction; a bracket 5 having a cylinder part 54 that is arranged in the open part; and a terminal 15 that is provided to the bracket 5. The terminal 15 comprises: a first part 4 that is connected to the external terminal connected to the external device; and a second part 42 that is connected to the metal member 6. The second part 42 is arranged between the inner peripheral surface 62 of the metal member 6 and an outer peripheral surface 54a of the cylinder part 54 of the bracket 5.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a motor. [Background technology]

[0002] Conventionally, there is known a motor that includes a connection terminal that contacts an external terminal connected to an external device and a bracket that houses the connection terminal, and that is driven when the external terminal is connected to the connection terminal (see, for example, Patent Document 1).

[0003] In such motors, an earth ground (known as a "frame earth") is sometimes provided to the frame to suppress electrical noise generated when the motor is in operation and to prevent malfunctions. When providing a frame earth, the motor can be earthed by electrically connecting it to the inner surface of the frame directly or via a jumper wire. However, this makes the wiring work complicated, and because the connections between the board, jumper wire, and inner surface of the frame are made by soldering, there is a risk of the wire breaking over time due to motor vibration.

[0004] On the other hand, the connection terminals are repeatedly inserted into the external terminals connected to external devices, and are then brought into contact with and connected to the external devices. At this time, a large force is applied to the connection terminals, and there is a concern that the connection terminals may be deformed if excessive force is repeatedly applied to the connection terminals. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-116247 Summary of the Invention [Problem to be solved by the invention]

[0006] An example of an object of the present invention is to provide a motor that can be easily grounded to a frame with a simple configuration and that can suppress deformation of a connection terminal that comes into contact with an external terminal connected to an external device. [Means for solving the problem]

[0007] The above-mentioned problems can be solved by, for example, the following aspect of the present invention. That is, one aspect of the motor of the present invention is as follows: a cylindrical metal member having an opening in an axial direction and an inner circumferential surface that defines the opening; a bracket having a cylindrical portion disposed within the opening; a terminal provided on the bracket; Equipped with the terminal includes a first portion that connects to an external terminal that is connected to an external device, and a second portion that contacts the metal member; The second portion is disposed between the inner peripheral surface of the metal member and the outer peripheral surface of the tubular portion of the bracket. [Brief explanation of the drawings]

[0008] [Figure 1] 3 is a vertical cross-sectional view of the vicinity of a bracket of a motor according to an embodiment of the present invention, which corresponds to the cross-sectional view taken along line BB in FIG. 2. FIG. [Figure 2] 2 is a cross-sectional view taken along the line AA in FIG. 1, showing a motor according to an embodiment of the present invention at the position of a bracket. [Figure 3] 2 is a cross-sectional view taken along the line CC in FIG. 1, showing a motor according to an embodiment of the present invention at the position of a bracket. [Figure 4] 3 is a cross-sectional view taken along the line DD in FIG. 2 in the vicinity of a bracket of a motor according to an embodiment of the present invention. [Figure 5] FIG. 2 is a front view of a first intermediate member including portions that will become first and second terminal members. [Figure 6]FIG. 10 is a top view (viewed from the upper side a) illustrating a state in which a support portion of a support member is attached to a first intermediate member including portions that will become first and second terminal members. [Figure 7] FIG. 10 is a front view (viewed from the other side f) illustrating a state in which a support portion of a support member is attached to a first intermediate member including portions that will become the first terminal member and the second terminal member. [Figure 8] 10 is a front view of a second intermediate member including portions that will become the first connection terminal, the first linking terminal, and the second linking terminal. FIG. [Figure 9] This is a top view (viewed from the upper side a) showing the state in which the support portion of the support member is attached to the second intermediate member including the portions that will become the first connection terminal, the first linking terminal, and the second linking terminal. [Figure 10] This is a rear view (viewed from one side e) showing the state in which the support portion of the support member is attached to the second intermediate member including the portions that will become the first connection terminal, the first linking terminal, and the second linking terminal. [Figure 11] FIG. 3 is a partial cross-sectional view taken along the line TT in FIG. 2. [Figure 12] FIG. 10 is a side view of the bracket to which parts and the like are attached, as viewed from one side c. [Figure 13] 15 is a cross-sectional view of a modified motor not incorporating a choke coil, taken at the position of the bracket, and corresponds to the VV cross-sectional view in FIG. 14. [Figure 14] 14 is a cross-sectional view taken along line UU in FIG. 13, showing the vicinity of the bracket of a motor according to a modified example in which a choke coil is not mounted. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a vertical cross-sectional view of the vicinity of a bracket 5 of a motor 1 according to an embodiment that is one example of the present invention, Fig. 2 is a horizontal cross-sectional view at the position of the bracket 5 of the motor 1, and Fig. 3 is a horizontal cross-sectional view at a position of the bracket 5 of the motor 1 that is different from that in Fig. 2. Fig. 1 corresponds to the BB cross-sectional view in Fig. 2, Fig. 2 corresponds to the AA cross-sectional view in Fig. 1, and Fig. 3 corresponds to the CC cross-sectional view in Fig. 1.

[0010] In FIG. 1, some members such as support members (brushes) 11 and 12, which will be described later, are not shown. 4 is a cross-sectional view of the vicinity of the bracket 5 of the motor 1 taken along the line DD in FIG. 2. In FIG. 4, the upper side a faces downward, and the lower side b faces upward.

[0011] As shown in Figures 1 to 4, the motor 1 of this embodiment includes a choke coil 2, connection terminals 3 and 4 (hereinafter, the connection terminals 3 and 4 will be referred to as the "first connection terminal 3" and the "second connection terminal 4", respectively) having contact surfaces 3a and 4a that come into contact (connect) with external terminals connected to external devices, a substrate 9 having wiring that electrically connects the choke coil 2 and the connection terminals 3 and 4, a bracket 5 on which the choke coil 2, the connection terminals 3 and 4, and the substrate 9 are mounted, and a frame 6 that fits into the bracket 5.

[0012] In the description of this embodiment, the direction of arrow a in the direction of the axis x of the motor 1 is defined as the upper side a, and the direction of arrow b is defined as the lower side b. Furthermore, in the longitudinal direction of the choke coil 2 (the directions of arrows c and d; hereinafter also referred to as the "longitudinal direction cd"), which is a direction perpendicular to the axis x, the direction of arrow c is defined as one side c of the longitudinal direction, and the direction of arrow d is defined as the other side d of the longitudinal direction. Furthermore, in the direction perpendicular to both the axis x and the longitudinal direction cd (the directions of arrows e and f; hereinafter also referred to as the "vertical direction ef"), the direction of arrow e is defined as one side e of the vertical direction, and the direction of arrow f is defined as the other side f of the vertical direction. The longitudinal direction of the choke coil 2 is also the axial direction of the choke coil, and the vertical direction of the choke coil 2 is also the radial direction of the choke coil 2.

[0013] The motor 1 includes a shaft 8 extending in the direction of the axis x. An upper side a of the shaft 8 is rotatably attached to the bracket 5 via a bearing 13 in the direction of the axis x, and the end of the upper side a protrudes beyond the upper side a of the bracket 5. Although not shown, an end of the shaft 8 on a lower side b in the direction of the axis x is rotatably attached to the frame 6 via a bearing.

[0014] A commutator 10 is attached to the shaft 8 coaxially with the shaft 8 on the lower side b of the bearing 13 in the direction of the axis x. A rotor 14 is attached to the shaft 8 coaxially with the shaft 8 on the lower side b of the commutator 10 in the direction of the axis x. The rotor 14 has a plurality of rotor cores 14b extending radially outward from the shaft 8, and coils 14a wound around the rotor cores 14b.

[0015] The frame 6 is a cylindrical metal member having an opening 61 on an upper side a and an inner peripheral surface 62 that defines the opening 61. The bracket 5 is located on the upper side a of the motor 1 and has a tray-like shape that covers the opening 61 of the frame 6. That is, the bracket 5 has a cover portion 51 on the upper side a, a cylindrical side portion 52 that rises from the outer periphery of the cover portion 51 toward the lower side b, and a cylindrical portion 54 that extends from the side portion 52 to the lower side b and has an outer shape that is smaller than the outer shape of the side portion 52. As shown in FIGS. 1 to 3 , the cylindrical portion 54 of the bracket 5 is disposed within the opening 61 of the frame 6, fits into the opening 61, and is fixed to the inner peripheral surface 62 of the frame 6.

[0016] The rectifying element 10 is made up of multiple metal plates (also called "segments") arranged in a circumferential direction, and when the surfaces of these metal plates come into contact with the contact portions 11b and 12b of the support members 11 and 12 described below, a direct current that generates a rotational force in the rotor 14 is supplied to the coil 14a with the direction of the current being switched appropriately.

[0017] A pair of conductive members (referred to as "support members") 11, 12, which function as so-called brushes, each have a pair of support portions 11a, 12a and a pair of contact portions 11b, 12b. The pair of support portions 11a, 12b support the pair of contact portions 11b, 12b relative to the bracket 5. The pair of contact portions 11b, 12b are in contact with multiple metal plates of the commutator 10, and the commutator 10 is disposed between the pair of contact portions 11b, 12b. The support members 11 and 12 are symmetrical with respect to a straight line parallel to the longitudinal direction cd of the choke coil 2.

[0018] The motor 1 includes a PTC (Positive Temperature Coefficient) thermistor 7 having a positive temperature coefficient, connecting terminals 18 and 19 (hereinafter, connecting terminal 18 and connecting terminal 19 will be referred to as the "first connecting terminal 18" and the "second connecting terminal 19") connected to the PTC thermistor 7, terminal members 15 and 16 (hereinafter, terminal member 15 and terminal member 16 will be referred to as the "first terminal member 15" and the "second terminal member 16") connected to the choke coil 2, and a commutator 10 electrically connected to the second terminal member 16 and the second connecting terminal 19.

[0019] The choke coil 2 is arranged on the side of arrow f within the bracket 5, and has one end on the connection terminal (first connection terminal 3 and second connection terminal 4) side (one side c) and the other end on the opposite side of the connection terminal (other side d). The choke coil 2 includes a coil 22 and a yoke (iron core) 21 surrounded by the coil 22. The coil 22 is wound around the outer circumferential surface of the yoke 21.

[0020] From the choke coil 2, a lead wire (hereinafter referred to as the "first lead wire") 23a is drawn out from the coil 22 toward one longitudinal side c and electrically connected to an external device not shown, and a lead wire (hereinafter referred to as the "second lead wire") 23b is drawn out from the coil 22 toward the other longitudinal side d and electrically connected to the commutator 10.

[0021] The first terminal member 15 and the second terminal member 16 are produced by forming a member (intermediate member) punched out from a single metal plate into a predetermined shape and then cutting it. Fig. 5 shows a front view of an intermediate member (hereinafter referred to as "first intermediate member") 20 including portions 15a and 16a that will become the first terminal member 15 and the second terminal member 16. In Fig. 5, the upper side a faces downward and the lower side b faces upward.

[0022] The first intermediate member 20 includes a portion 15a that will become the first terminal member 15, a portion 16a that will become the second terminal member 16, and a connecting portion 17 that connects the portions 15a and 16a together. The portion 15a that will become the first terminal member 15 includes a portion 41b and a portion 41a that will become the second connection terminal 4, and a portion 42b and a portion 42a that will become the frame earth portion 42, as will be described later.

[0023] The portion 15a that becomes the first terminal member 15 has a protrusion (hereinafter referred to as a "foot") 152 on the upper side a and a protrusion 153 on the lower side b. The foot 152 has a hook shape, and is inserted into a recess (insertion hole) 513 provided on the top surface 511 of the bracket 5 to engage (fix).

[0024] On the upper side a of the protruding portion 153, on the side opposite to the side connected to the coupling portion 17 (the side in the direction of the arrow c), a portion 41b and a portion 41a that will become the second connection terminal 4 are connected in this order. As will be described later, of the portion that will become the second connection terminal 4, the portion 41a (the portion that will become the contact surface 4a) becomes the first portion that connects to an external terminal that is connected to an external device. Therefore, the second connection terminal 4 may be referred to as the second connection terminal (first portion) 4.

[0025] Furthermore, on the underside a of the protruding portion 153, on the side opposite to the side connected to the connecting portion 17 (the side in the direction of arrow c), a portion 42b and a portion 42a that will become the frame earth portion 42 are connected in this order. As will be described later, the portion 42a that will become the frame earth portion 42 is the second portion that comes into contact with the inner circumferential surface 62 of the frame 6, which is a metal member. Therefore, the frame earth portion 42 may be referred to as the frame earth portion (second portion) 42.

[0026] Between connecting portion 17 and portion 15a, recesses 151b and 151c are provided on both sides in the width direction. Furthermore, between connecting portion 17 and portion 16a, recesses 161b and 161c are provided on both sides in the width direction. Connecting portion 17 and portion 15a can be separated using recesses 151b and 151c as a dividing line 151 connecting the two. Similarly, connecting portion 17 and portion 16a can be separated using recesses 161b and 161c as a dividing line 161 connecting the two.

[0027] The first intermediate member 20 is bent at the positions of bending lines F and G so as to form a mountain fold with respect to the plane of the drawing in Fig. 5 and so as to be approximately perpendicular to the plane of the connecting portion 17. Also, at the position of bending line H, the first intermediate member 20 is bent at the mountain fold with respect to the plane of the drawing in Fig. 5 and so as to be approximately parallel to the plane of the connecting portion 17. In this way, the portion 15a and the portion 16a are formed into the shapes of the first terminal member 15 and the second terminal member 16, respectively.

[0028] Furthermore, the first intermediate member 20 is bent at the position of the bending line I in a mountain fold relative to the plane of the drawing in FIG. 5 so that the angle between the plane of the portion 15a and the plane of the portion 41b is a narrow angle (see FIG. 6 described later; approximately 45° in FIG. 6). Then, starting from the boundary line between the portions 41a and 41b, the region of the portion 41a is rounded with a predetermined curvature toward the same side as the bending direction at the bending line I (the mountain fold side relative to the plane of the drawing in FIG. 5). In this way, the portions 41a and 41b are shaped into the shape of the second connection terminal 4.

[0029] Furthermore, at the position of the bending line K, the portion 42a is bent in a valley fold relative to the plane of the drawing in Fig. 5 and is bent approximately parallel to the plane of the connecting portion 17. And at the position of the bending line L, the portion 42a is bent in a mountain fold relative to the plane of the drawing in Fig. 5 and is bent approximately perpendicular to the plane of the connecting portion 17. In this way, the portion 42a and the portion 42b are formed into the shape of the frame grounding portion 42.

[0030] The first intermediate member 20 has the shapes of the first terminal member 15 and the second terminal member 16, and the support portion 12a of the support member 12 is attached to a portion 16a. Fig. 6 shows a top view (viewed from the upper side a) of the part 24 in a state where the support member 12 is attached to the first intermediate member 20, and Fig. 7 shows a front view (viewed from the other side f). Fig. 6 shows the positions of the bending lines F to I and K to L along which the first intermediate member 20 is bent by the bending process.

[0031] As described above, the first intermediate member 20 after bending includes the portion 15a that will become the first terminal member 15 and the portion 16a that will become the second terminal member 16. Furthermore, the portion 16a that will become the second terminal member 16 includes the portions 41a and 41b that will become the second connection terminal 4, and the portions 42a and 42b that will become the frame earth portion 42.

[0032] By cutting along the dividing lines 151 and 161 and removing the connecting portion 17, the first terminal member 15 and the second terminal member 16 (including the second connection terminal 4 and the frame earth portion 42) can be obtained as they are. In the following explanation, regardless of whether the connecting portion 17 is present or not, each portion will be described by the name of the respective finished part (first terminal member 15, second terminal member 16, second connection terminal 4 and frame earth portion 42).

[0033] The second terminal member 16 includes a foot portion 162, an attachment portion 163, and an overhang portion 164. The foot portion 162 is an engagement portion that engages with the bracket 5 on an upper side a. The support portion 12a is attached to the attachment portion 163 on a lower side b. The overhang portion 164 continues from the attachment portion 163 to the other side f on the lower side b, and is bent to one side c to overhang from the attachment portion 163. The foot portion 162 has a hook shape, and is inserted into and engaged with (fixed to) a slit-shaped insertion hole 512 provided in a surface of the cover portion 51 of the bracket 5 facing the lower side b (hereinafter referred to as the "top surface 511").

[0034] In the direction of axis x, the mounting portion 163 is continuous with a lower side b of the foot portion 162, and two holes 163b for mounting the support portion 12a are provided in the direction of axis x near the center (intermediate portion) between an end portion 163a of the lower side b of the mounting portion 163 and the foot portion 162. The support member 12 is mounted to the second terminal member 16 with a mounting fixture 163c such as a screw so that a surface 163d facing one side c of the mounting portion 163 comes into contact with a mounting surface 12a′ of the support portion 12a of the support member 12 (see FIGS. 6 and 7).

[0035] The second terminal member 16 has a protrusion 164a that protrudes toward the lower side b near the end of one side c of the protrusion 164, and an engagement portion 164b having a slit that opens toward the lower side b is formed at the end of the lower side b of the protrusion 164a. In the first terminal member 15, an engaging portion 153b having a slit opening toward the lower side b is formed at an end portion 153a of the protruding portion 153 on the lower side b. In this manner, a part 24 is obtained in which the support member 12 is attached to the first intermediate member 20, as shown in FIGS.

[0036] The component 24 is attached to the bracket 5 either as it is, or as two components, a component including the first terminal member 15 and the second connecting terminal 4 and a component including the second terminal member 16 and the support member 12, after cutting along the dividing lines 151 and 161 to remove the connecting portion 17. If the component 24 is attached to the bracket 5 as it is, it can be simply cut along the dividing lines 151 and 161 after attachment to remove the connecting portion 17.

[0037] 4, the first terminal member 15 is attached to the bracket 5 by inserting and engaging (fixing) the foot 152 into an insertion hole 513 provided in the top surface 511 of the bracket 5. On the other hand, the second terminal member 16 is attached to the bracket 5 by inserting and engaging (fixing) the foot 162 into an insertion hole 512 provided in the top surface 511 of the bracket 5.

[0038] A plurality of (two in this embodiment) holding portions 53a, 53b are provided on the top surface 511 of the bracket 5, and the choke coil 2 is held by the holding portions 53a, 53b (see FIGS. 2 and 4). The holding portions 53a, 53b are arranged as a pair in the longitudinal direction cd of the choke coil 2, and the yoke 21 protruding from both ends of the coil 22 in the choke coil 2 is held by these holding portions 53a, 53b.

[0039] In this embodiment, there are two holding portions 53a and 53b, but other holding portions for holding the outer peripheral surface of coil 22 may be provided, or holding portions for holding the outer peripheral surface of coil 22 may be provided instead of the holding portions that hold yoke 21 at both ends, or these may be combined. Also, any number of holding portions may be provided, but a plurality is preferable for stable holding of choke coil 2. To hold the choke coil, it is preferable that a holding portion is provided on top surface 511 of bracket 5, but some of the holding portions, or all of the holding portions, may be provided on a location other than top surface 511, such as side portion 52, as long as stable holding is possible.

[0040] In this embodiment, the terminal including the second connection terminal 4 corresponding to the first portion and the frame earth portion 42 corresponding to the second portion corresponds to the first terminal member 15. The first terminal member 15 branches into a second connection terminal (first portion) 4 and a frame earth portion (second portion) 42 at a protruding portion 153 (another portion of the terminal).

[0041] 2 and 6, the second connection terminal (first portion) 4 extends from the protrusion 153 toward the shaft 8 at the position of the bending line I, and is provided with a contact surface 4a having a predetermined curved surface at its tip. The second connection terminal (first portion) 4 is located in a space 56 provided in the bracket 5, as shown in FIG.

[0042] 2 and 6, the frame earth portion (second portion) 42 extends from the protruding portion 153 toward the inner peripheral surface 62 of the frame (metal member) 6 at the position of the bending line K. The bending lines K and I are positioned such that the bending axes extending in the direction of the axis x are substantially aligned, with the only difference being the bending directions.

[0043] 2 and 6, the frame earth part (second part) 42 is bent in the direction of arrow e at the position of the bending line L, and is connected to a part 42a that extends in a direction along the inner peripheral surface 62 of the frame 6. As shown in FIG. 6, the frame earth part 42 has a circular embossed protrusion 42a-1 at approximately the center of the surface of part 42a that faces the inner peripheral surface 62 of the frame 6.

[0044] In the motor 1, the first connection terminal 3, the first linking terminal 18, and the second linking terminal 19 are arranged at positions approximately symmetrical to the second connection terminal 4, the first terminal member 15, and the second terminal member 16, with respect to a straight line in the direction of arrow cd that passes through the core (axis x) of the shaft 8. The first connection terminal 3, the first linking terminal 18, and the second linking terminal 19 are also produced by forming a member (intermediate member) punched out from a single metal plate and then cutting it into pieces.

[0045] Fig. 8 shows a front view of an intermediate member (hereinafter referred to as "second intermediate member") 30 including portions 31a, 31b, 18a, and 19a that will become the first connection terminal 3, the first linking terminal 18, and the second linking terminal 19. In Fig. 8, the upper side a faces downward, and the lower side b faces upward.

[0046] The second intermediate member 30 includes a portion 31b and a portion 31a that will become the first connecting terminal 3, a portion 18a that will become the first connecting terminal 18, a portion 19a that will become the second connecting terminal 19, and a connecting portion 27 that connects the portions 18a and 19a. The portion 18a that will become the first connecting terminal 18 includes a portion 32b and a portion 32a that can become a frame ground portion. However, in this embodiment, as will be described later, the portion 32b is not used as a frame ground portion. The frame ground portion 32 depicted by a dotted line in FIG. 3 does not exist in this embodiment.

[0047] On the side of arrow c of portion 18a which becomes first connecting terminal 18, a foot portion 182 is provided on the upper side a and a main portion 183 is provided on the lower side b. On the side of arrow d of portion 18a, a contact portion 184 and a leaf spring portion 186 extending in the up and down directions ab from contact portion 184 are provided. Furthermore, a conductive portion 185 which electrically connects main portion 183 and contact portion 184 is provided in the center of portion 18a in the direction of arrow cd.

[0048] The leg portion 182 has a hook-like shape, and is inserted into and engaged with (fixed to) an insertion hole (not shown) provided in the top surface 511 of the bracket 5. On the upper side a of the main portion 183, on the side opposite to the side connected to the coupling portion 27 (the side in the direction of the arrow c), a portion 31b and a portion 31a that will become the first connection terminal 3 are connected in this order. As will be described later, of the portions that will become the first connection terminal 3, the portion 31a becomes the first portion that connects to an external terminal that is connected to an external device. Therefore, the first connection terminal 3 may be referred to as the first connection terminal (first portion) 3.

[0049] Furthermore, on the underside a of the main portion 183, on the side opposite to the side connected to the connecting portion 27 (the side in the direction of the arrow c), a portion 32b and a portion 32a that can serve as a frame earth portion are connected in this order. An example of using the portion 32b and the portion 32a as a frame earth portion will be described after the description of this embodiment.

[0050] A contact portion 184 is provided near the end of the conductive portion 185 on the side indicated by the arrow d. The contact portion 184 is made up of two circular, embossed protrusions that protrude toward the front of the paper in Fig. 8. A partition line 181 is provided on the side of the arrow d of the contact portion 184 between the connecting portion 27 and the portion 18a.

[0051] Delimiter line 181 is arranged to separate connecting portion 27 from portion 18a. Similarly, delimiter line 191 between connecting portion 27 and portion 19a, which will become second connecting terminal 19, is arranged to separate connecting portion 27 from portion 19a. Delimiter lines 181, 191 may have notches to facilitate separation (for example, by thinning the plate thickness along delimiter lines 181, 191, or by providing recesses shaped like recesses 151b, 151c).

[0052] A contact portion 194 is provided immediately on the side of the arrow d of the dividing line 191, and a leaf spring portion 196 is provided extending in the up and down directions ab from the contact portion 194. The contact portion 194 is made up of two circular embossed protrusions that protrude toward the back side of the paper in FIG. 8 (i.e., the front side of the paper is a recess).

[0053] The portion 19a that becomes the second connecting terminal 19 has a foot portion 192 on the upper side a and an attachment portion 193 on the lower side b on the side of arrow d. The foot portion 192 has a hook shape and is inserted into and engaged with (fixed to) an insertion hole (not shown) provided in the top surface 511 of the bracket 5. In addition, a conductive portion 195 that electrically connects the attachment portion 193 and the contact portion 194 is provided slightly toward the arrow c side and at the center in the direction of arrow cd of the portion 19a.

[0054] The second intermediate member 30 is bent at the position of the bending line Q so as to make a valley fold relative to the plane of the drawing in FIG. 8 and at a slightly obtuse angle relative to the plane of the connecting portion 27. Also, at the position of the bending line R, the second intermediate member 30 is bent slightly so as to make a valley fold relative to the plane of the drawing in FIG. 8. Furthermore, at the position of the bending line S, the second intermediate member 30 is bent so as to make a valley fold relative to the plane of the drawing in FIG. 8 and at a perpendicular angle to the plane on the arrow d side of the main portion 183. In this way, the portion 18a and the portion 19a are formed into the shapes of the first connecting terminal 18 and the second connecting terminal 19, respectively.

[0055] The second intermediate member 30 is also bent at the position of the bending line P so as to make a valley fold with respect to the plane of the drawing in FIG. 8, so that the angle between the plane of the portion 18a and the plane of the portion 31b is a narrow angle (see FIG. 6, described later; approximately 45° in FIG. 6). Then, starting from the boundary line between the portions 31a and 31b, the region of the portion 31a is rounded with a predetermined curvature toward the same side as the bending direction at the bending line I (the mountain fold side with respect to the plane of the drawing in FIG. 5). In this way, the portions 31a and 31b are shaped into the shape of the first connection terminal 3. As can be seen from FIG. 2, the first connection terminal 3 has a shape that is symmetrical to the second connection terminal 4 with respect to a straight line parallel to the longitudinal direction cd of the choke coil 2.

[0056] Furthermore, at the position of the bending line M, the main portion 183 is bent in a mountain fold relative to the plane of the drawing in Fig. 8, so as to be approximately parallel to the face on the arrow d side. And at the position of the bending line N, the main portion 183 is bent in a valley fold relative to the plane of the drawing in Fig. 8, so as to be approximately perpendicular to the face on the arrow d side. In this way, the portion 32a and the portion 32b are shaped into the shape of the frame grounding portion 32.

[0057] The second intermediate member 30 has the shapes of the first connection terminal 3, the first linking terminal 18, and the second linking terminal 19, and the support portion 11a of the support member 11 is attached to a portion 19a. Fig. 9 shows a top view (viewed from the upper side a) of the part 34 in a state where the support member 11 is attached to the second intermediate member 30, and Fig. 10 shows a rear view (viewed from one side e). Fig. 10 is upside down compared to Fig. 8, and shows the rear side of the second intermediate member 30. Fig. 9 also shows the positions of the bending lines M to N and the bending lines P to S along which the second intermediate member 30 is bent by the bending process.

[0058] As described above, the second intermediate member 30 after bending includes the portion 31b and the portion 31a that will become the first connecting terminal 3, the portion 18a that will become the first connecting terminal 18, and the portion 19a that will become the second connecting terminal 19. Furthermore, the portion 19a that will become the second connecting terminal 19 includes the portion 31a and the portion 31b that will become the first connecting terminal 3, and the portion 32a and the portion 32b that will become the frame earth portion 32.

[0059] By cutting along the dividing lines 181 and 191 and removing the connecting portion 27, the first connecting terminal 3, the first connecting terminal 18, and the second connecting terminal 19 (including the frame earth portion 32) are obtained as they are. In the following explanation, regardless of whether the connecting portion 27 is present or not, each portion will be described by the name of the respective finished part (first connecting terminal 18, second connecting terminal 19, first connecting terminal 3, and frame earth portion 32).

[0060] In the direction of axis x, the mounting portion 193 is continuous with a lower side b of the foot portion 192, and two holes 193b for mounting the support portion 11a are provided in the direction of axis x near a central portion (intermediate portion) between an end portion 193a of the lower side b of the mounting portion 193 and the foot portion 192. The support member 11 is mounted to the second connecting terminal 19 with a mounting fixture 193c such as a screw so that the mounted surface 12a′ of the support portion 11a of the support member 11 contacts a surface 193d facing one side c of the mounting portion 193 (see FIGS. 9 and 10).

[0061] In this manner, a part 34 is obtained in which the support member 11 is attached to the second intermediate member 30, as shown in FIGS. In this embodiment, the frame earth portion 32 is not used, so the first connecting terminal 18 is cut at the position of the bending line M, and the portion 32a and the portion 32b are removed from the first connecting terminal 18 at this stage. This cutting operation may be performed before the attachment operation of the support member 11, or may be performed together with or before the bending process along the bending lines P to S.

[0062] Component 34 is attached to bracket 5 either as component 34 or by cutting along delimiting lines 181 and 191 to remove connecting portion 27, with two components, one including first connecting terminal 18 and first connection terminal 3 and the other including second connecting terminal 19 and support member 11. If component 34 is attached to bracket 5 as is, it is sufficient to cut along delimiting lines 181 and 191 after attachment to remove connecting portion 27. As described above, the first connecting terminal 18 and the second connecting terminal 19 are attached to the bracket 5 by engaging (fixing) with the top surface 511 via the foot portion 152 and the foot portion 192.

[0063] The PTC thermistor 7 is in contact with and electrically connected to the contact portion 184 of the first connecting terminal 18 and the contact portion 194 of the second connecting terminal 19. As can be seen from Figure 9 (where the connecting portion 27 has been removed), when the PTC thermistor 7 is not attached, the first connecting terminal 18 and the second connecting terminal 19 are positioned to form a straight line.

[0064] When mounting the PTC thermistor 7, the conductive portions 185 and 195 are each retracted, and the PTC thermistor 7 is screwed between them to attach it to a predetermined position on the bracket 5. At this time, the leaf spring portion 186 of the first connecting terminal 18 and the leaf spring portion 196 of the second connecting terminal 19 each come into contact with a wall provided inside the bracket 5 and are stretched, and their respective elastic forces act to press the conductive portions 185 and 195 against the PTC thermistor 7.

[0065] 2 and 9, the first connection terminal (first portion) 3 extends from the main portion 183 toward the shaft 8 at the position of the bending line P, and is provided with a contact surface 3a having a predetermined curved surface at its tip. The first connection terminal (first portion) 3 is located in a space 55 provided in the bracket 5, as shown in FIG.

[0066] A pair of the first connection terminal 3 and the second connection terminal 4 constitutes a connection terminal electrically connected to an external device. The first connection terminal 3 and the second connection terminal 4 have contact surfaces 3a and 4a that come into contact with external terminals connected to the external device.

[0067] 3 and 4, the substrate 9 is attached to the bracket 5 by a fastener such as a screw at a position close to one side c of the bracket 5. The substrate 9 faces the top surface 511 of the bracket 5. As shown in FIGS. 2 and 3, the substrate 9 is disposed so as to cover a portion of the yoke 21 of the choke coil 2 that protrudes from the coil 22 to the one side c, the first connecting terminal 3, and the second connecting terminal 4. Furthermore, as shown in FIG. 3, the substrate 9 is located between the first connecting terminal 18 and the first terminal member 15 in the direction of the arrow ef.

[0068] As shown in Fig. 3, printed wiring is provided on the surface of the lower side b of the substrate 9, and pads 91 and 92 are formed on both ends in the direction of the arrow ef. As shown in Fig. 4, a protruding portion 153 of the first terminal member 15 is located adjacent to the substrate 9 and perpendicular to the substrate 9. The pad 92 formed on the surface of the lower side b of the substrate 9 and the protruding portion 153 of the first terminal member 15 are then soldered together, electrically connecting the circuit of the substrate 9 and the first terminal member 15, and fixing the substrate 9 to the bracket 5.

[0069] Although not shown in the drawing, the pad 91 formed on the lower surface b of the substrate 9 and the main portion 183 of the first connecting terminal 18 are in a similar positional relationship and are similarly joined by solder, so that the circuit of the substrate 9 and the first connecting terminal 18 are electrically connected and the substrate 9 is fixed to the bracket 5.

[0070] As shown in Fig. 4, the protruding portion 153 of the first terminal member 15 extends from the upper side a to the lower side b of the substrate 9, with the end portion 153a exposed on the lower side b of the substrate 9. As shown in Fig. 3, the first lead wire 23a drawn out from one end of the choke coil 2 is fitted into a gap in an engaging portion 153b (see Fig. 5) formed on the end portion 153a. Then, by crimping the protruding portion 153a with pliers or the like, the first lead wire 23a can be fixed to the first terminal member 15 and electrically connected.

[0071] 3, the second lead wire 23b drawn out from the other end of the choke coil 2 is connected to the second terminal member 16. The second lead wire 23b and the second terminal member 16 can be fixed and electrically connected by fitting the first lead wire 23a into the gap of the engaging portion 164b and then crimping the protruding portion 164a with pliers or the like.

[0072] As described above, the bracket 5 is fitted with components such as the first connecting terminal 18 including the first connecting terminal 3, the first terminal member 15 including the second connecting terminal 4 (first part) and the frame earth part (second part) 42, the choke coil 2, the PTC thermistor 7, the second connecting terminal 19, the second terminal member 16, the support members (brushes) 11, 12, and the substrate 9 (hereinafter collectively referred to as "components, etc.").

[0073] The bracket 5, to which components and the like are attached, is attached to the frame 6 so as to cover the opening 61 of the frame 6. More specifically, as shown in Fig. 1, the bracket 5 is fixed in a state in which the cylindrical portion 54 is fitted into the opening 61 of the frame 6. The inner peripheral surface 62 of the opening 61 and the cylindrical portion 54 are fixed together with a fastener such as an adhesive or a screw.

[0074] 2. The frame grounding portion 42 passes through a through-hole 59b formed in the cylindrical portion 54 of the bracket 5 and protrudes from the outer peripheral surface 54a of the cylindrical portion 54 of the bracket 5. A recess 52b is formed in the outer peripheral surface 54a of the cylindrical portion 54 of the bracket 5, and the portion 42a of the frame grounding portion 42 is accommodated in this recess 52b. The portion 42a of the frame grounding portion 42 is disposed between the inner peripheral surface 62 of the frame 6 and the outer peripheral surface 54a of the cylindrical portion 54 of the bracket 5.

[0075] The protrusion 42a-1 comes into contact with the inner peripheral surface 62 and is thus frame-grounded. The portion 42a of the frame grounding portion 42 has a shape that follows the inner peripheral surface 62 of the frame 6, i.e., a flat shape. If the inner peripheral surface of the frame that it comes into contact with is curved, for example, the shape of the portion 42a should preferably follow the shape of the curved surface.

[0076] 1 and 2, in the AA cross section, the bracket 5 and the frame 6 are fitted together, so that the frame 6 is present adjacent to the outer periphery of the bracket 5. However, in a region (for example, region J in FIG. 1) closer to the upper side a in the direction of the axis x, only the bracket 5 is present, and the frame 6 is not present. In FIG. 2, the regions indicated by dotted lines and labeled with reference numerals 57 and 58 indicate openings provided in the side portion 52 of the bracket 5 in region J closer to the upper side a than the AA cross section (hereinafter referred to as "hole portion 57" and "hole portion 58").

[0077] Fig. 12 is a side view of the bracket 5 to which components and the like are attached, as seen from the tip of one side c. When viewed from the outside of the bracket 5 (as viewed from the tip of one side c in Fig. 2), the hole 57 opens toward the contact surface 3a of the first connection terminal 3, and the hole 58 opens toward the contact surface 4a of the second connection terminal 4 (the interiors of the holes 57 and 58 are not shown in Fig. 12).

[0078] Therefore, external terminals (not shown) connected to external devices are inserted into the bracket 5 through the holes 57, 58 and come into contact with the contact surfaces 3a, 4a. That is, the first connection terminal 3 and the second connection terminal 4 serve as female terminals in the motor 1. The holes 57, 58 in the bracket 5, the spaces 55, 56 in the bracket 5, the first connection terminal 3, and the second connection terminal (first portion) 4 form a connector into which external terminals (not shown) connected to external devices are inserted.

[0079] In the motor 1 of the present embodiment described above, one terminal member (first terminal member 15) has a first portion (second connection terminal 4 serving as a female terminal) that connects to an external terminal connected to an external device, and a second portion (frame earth portion 42) that contacts the metal frame 6. When the external terminal connected to the external device is inserted or removed, the second connection terminal 4 is subjected to impacts and vibrations, and is subjected to a large load, a torsional load, and the like.

[0080] However, according to the motor 1 of this embodiment, the frame earth portion 42, which is another part of the same member (first terminal member 15) as the second connection terminal 4, is positioned and supported between the inner surface 62 of the frame 6 and the outer surface 54a of the tubular portion 54 of the bracket 5, thereby suppressing deformation of the second connection terminal 4.

[0081] In particular, in this embodiment, the first portion (second connection terminal 4) and the second portion (frame ground portion 42) are branched from another portion (protrusion 153) of the terminal (first terminal member 15), so the distance between the first portion and the second portion is short. Therefore, by supporting the second portion on the bracket 5 and the frame 6, it is possible to efficiently suppress the effects of load, twisting, and the like on the first portion.

[0082] Although the motor of the present invention has been described above with reference to preferred embodiments, the motor of the present invention is not limited to the configuration of the above embodiments. For example, in the motor 1 of the above embodiment, the portion of the terminals connected to the external terminals connected to the external device, which is on the side of the second connection terminal 4, is frame-grounded, but the portion on the side of the first connection terminal 3 may also be frame-grounded.

[0083] In this case, the contact surface 3a (portion 31a) of the first connection terminal 3 is the "first portion that connects to an external terminal that is connected to an external device" according to the present invention. Therefore, in the following description of the modified example, the first connection terminal 3 may be referred to as the first connection terminal (first portion) 3.

[0084] This modified example, which aims to obtain a motor in which the portion on the side of the first connection terminal 3 is frame-grounded, can also be manufactured using the same components as the motor 1 of the above embodiment. Specifically, in the motor 1 of the embodiment, the work of separating and removing the portion 32b and portion 32a that can become the frame ground portion from the first connecting terminal 18 is not performed.

[0085] Furthermore, in the motor 1 of this embodiment, the portions 42b and 42a that can become the frame earth portion 42 are not used, and therefore the first terminal member 15 is cut at the position of the bending line K, and the portions 42a and 42b are removed from the first terminal member 15 at some stage. This cutting operation may be performed before or after the attachment operation of the support member 12, or may be performed together with or before the bending process along the bending lines F to I.

[0086] In this modification, a terminal including a first connection terminal 3 corresponding to the first portion and a frame earth portion 32 corresponding to the second portion corresponds to a first linking terminal 18. The first connecting terminal 18 is branched into a first connection terminal (first portion) 3 and a frame earth portion (second portion) 32 at a main portion 183 (other portion of the terminal).

[0087] 9, the frame grounding portion (second portion) 32 extends from the main portion 183 toward the inner peripheral surface 62 of the frame (metal member) 6 at the position of the bending line M. The positions of the bending line M and the bending line P differ only in the bending direction, and the positions of the bending axes extending in the direction of the axis x are approximately the same.

[0088] 9, the frame earth part (second part) 32 is bent in the direction of arrow f at the position of the bending line N, and is connected to a part 32a that extends in a direction along the inner peripheral surface 62 of the frame 6. As shown in FIG. 9, the frame earth part 32 has a circular embossed protrusion 32a-1 at approximately the center of the surface of part 32a that faces the inner peripheral surface 62 of the frame 6.

[0089] 3, the frame grounding part 32 passes through a through-hole 59a provided in the cylindrical part 54 of the bracket 5 and protrudes from the outer peripheral surface 54a of the cylindrical part 54 of the bracket 5. The portion 32a of the frame grounding part 32 is disposed between the inner peripheral surface 62 of the frame 6 and the outer peripheral surface 54a of the cylindrical part 54 of the bracket 5.

[0090] The protrusion 32a-1 comes into contact with the inner peripheral surface 62 and is thus frame-grounded. The portion 32a of the frame grounding portion 32 has a shape that follows the inner peripheral surface 62 of the frame 6, i.e., a flat shape. If the inner peripheral surface of the frame that it comes into contact with is, for example, curved, it is desirable that the shape of the portion 32a follow the shape of the curved surface.

[0091] In the motor of the above-described modified example, one terminal member (first connecting terminal 18) has a first portion (first connection terminal 3 serving as a female terminal) that connects to an external terminal connected to an external device, and a second portion (frame earth portion 32) that contacts the metal member, frame 6. When the external terminal connected to the external device is inserted or removed, impacts and vibrations are applied to the first connection terminal 3, and a strong load, torsional load, etc. are applied.

[0092] However, in the motor of this modified example, the frame earth portion 32, which is another part of the same member (first connecting terminal 18) as the first connecting terminal 3, is positioned and supported between the inner surface 62 of the frame 6 and the outer surface 54a of the tubular portion 54 of the bracket 5, so that deformation of the first connecting terminal 3 can be suppressed.

[0093] In particular, in this embodiment, the first portion (first connection terminal 3) and the second portion (frame ground portion 32) are branched from another portion (main portion 153) of the terminal (first linking terminal 183), so the distance between the first portion and the second portion is short. Therefore, by supporting the second portion on the bracket 5 and the frame 6, it is possible to efficiently suppress the effects of load, twisting, and the like on the first portion.

[0094] Furthermore, in the motor 1 of the above embodiment, a configuration has been described in which the recess 52b is provided on the outer peripheral surface 54a of the cylindrical portion 54 of the bracket 5, and the portion 42a of the frame earth portion 42 is housed in this recess 52b, but the present invention is not limited to this. It is also possible that the outer peripheral surface 54a of the cylindrical portion 54 of the bracket 5 does not have the recess 52, but instead a recess is provided on the inner peripheral surface 62 of the frame (metal member) 6, and the portion 42a of the frame earth portion 42 is housed in this recess.

[0095] Alternatively, a configuration may be adopted in which recesses are provided on both the outer peripheral surface 54a of the cylindrical portion 54 of the bracket 5 and the inner peripheral surface 62 of the frame (metal member) 6, and the portion 42a of the frame earth portion 42 is housed in these two recesses. Furthermore, a configuration may be adopted in which no recesses are provided on either the outer peripheral surface 54a of the cylindrical portion 54 of the bracket 5 or the inner peripheral surface 62 of the frame (metal member) 6, and the portion 42a of the frame earth portion 42 is sandwiched between the outer peripheral surface 54a and the inner peripheral surface 62.

[0096] Furthermore, while the motor 1 of the above embodiment has been described with reference to an example configuration including the choke coil 2, the present invention is not limited to this, and the configuration of the present invention can also be applied to a motor that does not include the choke coil 2. When attempting to obtain a motor with the same configuration as the motor 1 of the above embodiment but that does not include the choke coil 2, the first intermediate member 20 may be attached to the bracket 5 in the shape that it has after bending, without removing the connecting portion 17.

[0097] Fig. 13 shows a cross-sectional view of a modified motor 1' not equipped with a choke coil at the position of the bracket 5, and Fig. 14 shows a cross-sectional view of the motor 1' of the modified example near the bracket taken along line UU in Fig. 13. Note that Fig. 13 corresponds to the cross-sectional view of the motor 1 of the embodiment in Fig. 3 and is a cross-sectional view of the motor 1 of the embodiment taken along line VV in Fig. 14. Fig. 14 corresponds to the cross-sectional view of the motor 1 of the embodiment in Fig. 4. The same reference numerals as those in Figs. 3 and 4 for the motor 1 of the embodiment are used in Figs. 13 and 14.

[0098] 13 and 14, in motor 1 of the embodiment, there is no choke coil where choke coil 2 was previously installed, and instead, connecting portion 17 of first intermediate member 20 extends therefrom. That is, connecting portion 17 extending into the location where the choke coil was previously installed directly connects first terminal member 15 and second terminal member 16, thereby completing an electrical circuit and allowing motor 1' to function as a modified example that does not include a choke coil.

[0099] Furthermore, in the motor 1 of the above embodiment, a configuration including a PTC thermistor 7 has been described as an example, but the present invention is not limited to this, and the configuration of the present invention can also be applied to a motor that does not have a PTC thermistor 7.

[0100] When obtaining a motor that does not include a PTC thermistor 7, similar to the modified motor 1' that does not include a choke coil, the connecting portion 27 of the second intermediate member 30 is not removed, and the first intermediate member 30 is used in its original shape after bending. In this way, the connecting portion 27 extending to the location where the PTC thermistor 7 was installed directly connects the first connecting terminal 18 and the second connecting terminal 19, completing an electrical circuit and allowing the motor to function as a motor that does not include a PTC thermistor.

[0101] In addition, those skilled in the art can appropriately modify the motor of the present invention in accordance with conventionally known knowledge. As long as such modifications still comprise the configuration of the present invention, they are of course included in the scope of the present invention. [Explanation of symbols]

[0102] 1...motor, 2...choke coil, 3...first connection terminal, 3a...contact surface, 4...second connection terminal (first portion), 4a...contact surface, 5...bracket, 6...frame (metal member), 7...PTC thermistor, 8...shaft, 9...substrate, 9a, 9b...through hole, 10...commutator, 11, 12...support member (brush), 11a, 12a...support portion, 11b, 12b...contact portion, 13...bearing, 14...rotor, 14a...coil, 14b...rotor core, 15...first terminal member, 15a...portion, 1 51...dividing line, 151b, 151c...recess, 152...foot portion, 153...protruding portion, 153a...end portion, 153b...engaging portion, 16...second terminal member, 16a...portion, 161...dividing line, 161b, 161c...recess, 162...foot portion, 163...mounting portion, 163a...end portion, 163b...hole, 163c...mounting fixture, 163d...surface, 164...extending portion, 164a...protruding portion, 164b...engaging portion, 17...connecting portion, 18...first connecting terminal, 18a...portion, 181...dividing line, 182...foot portion, 18 3...main portion, 183a...end portion, 184...contact portion, 185...conductive portion, 186...plate spring portion, 19...second connecting terminal, 191...separator line, 192...foot portion, 193...mounting portion, 193a...end portion, 193b...hole 193b, 193c...mounting fixture, 193d...surface, 194...contact portion, 195...conductive portion, 196...plate spring portion, 20...first intermediate member, 21...yoke, 22...coil, 23a...first lead wire, 23b...second lead wire, 24...component, 27...connecting portion, 30...second intermediate member, 31a, 31b...portion, 32...frame grounding portion (second portion), 32a, 32b...portions, 32a-1...protruding portion, 41a, 41b...portions, 42...frame grounding portion (second portion), 42a, 42b...portions, 42a-1...protruding portion, 51...lid portion, 511...top surface, 512, 513...insertion holes, 52...side portion, 52a, 52b...recessed portion, 53a, 53b...holding portion, 54...cylindrical portion, 54a...outer peripheral surface, 55, 56...space, 57, 58...hole portion, 59a, 59b...through hole, 61...opening, 62...inner peripheral surface

Claims

1. a cylindrical metal member having an opening in an axial direction and an inner circumferential surface that defines the opening; a bracket having a cylindrical portion disposed within the opening, a lid portion, and a cylindrical side portion between the cylindrical portion and the lid portion; a terminal provided on the bracket; Equipped with The side portion has a hole. There is a space inside the bracket that is continuous with the hole in the bracket in the radial direction, the terminal includes a first portion that connects to an external terminal that is connected to an external device, and a second portion that contacts the metal member; the first portion is located within the space; a connector is formed by the hole of the bracket, the space of the bracket, and the first portion, The second portion is disposed between an inner peripheral surface of the metal member and an outer peripheral surface of the cylindrical portion of the bracket. Motor.

2. the first portion and the second portion branch off from other portions of the terminal; The motor according to claim 1 .

3. In the radial direction, there is a recess on the inner peripheral surface of the metal member or the outer peripheral surface of the bracket, The second portion is in the recess.

3. The motor according to claim 1 or 2.

4. The second portion has a shape that follows the inner circumferential surface of the metal member.

4. The motor according to claim 1.

5. The second portion passes through the cylindrical portion of the bracket and protrudes from the outer peripheral surface of the bracket.

5. The motor according to claim 1.

6. a brush provided on the bracket; and a commutator, The terminal is electrically connected to the brush.

6. The motor according to claim 1.

7. The bracket is provided with a substrate; The terminal is connected to a wiring on the substrate.

7. The motor according to claim 1.

Images