electric machine

Abstract

The electric motor (1) of the embodiment is provided with a cover (3) and a housing (2). The housing (2) is provided with the cover (3). The cover (3) is provided with a first terminal (14). The housing (2) is provided with a second terminal (15). The first terminal (14) and the second terminal (15) are engaged to form a terminal portion (14, 15).

Description

Technical Field

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

[0002] Motors such as brushless motors are equipped with motor terminals for external power supply. These motor terminals are located on a motor cover or other device. Wires forming the motor's coils are connected to the inside of these motor terminals by fusing, binding, or other methods. The outside of these motor terminals form electrodes, such as pins, that are inserted into a power supply connector or other device (see, for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2019-41549 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] However, even for motors with the same basic performance specifications, the shape of the motor terminals may change depending on the product to which the motor is installed or the recipient's requirements. In such cases, the motor manufacturer must modify the motor terminals to the desired shape, either redesigning and manufacturing the modified motor terminals or reshaping existing motor terminals, which is a complex process.

[0008] Therefore, when designing the motor terminal, it is necessary to exhibit the required performance and to have a required shape, which limits the degree of freedom in design.

[0009] The present invention has been made in view of the above, and an object of the present invention is to provide a motor capable of improving the degree of freedom in designing motor terminals.

[0010] Solutions for solving problems

[0011] To solve the above-mentioned problems and achieve the purpose, a motor according to one embodiment of the present invention includes a cover and a housing. The housing is provided with the cover. The cover is provided with a first terminal. The housing is provided with a second terminal. The first terminal and the second terminal engage to form a terminal portion.

[0012] A motor according to one aspect of the present invention can improve the degree of freedom in designing motor terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective view of the appearance of a motor according to one embodiment.

[0014] Figure 2 It's the motor Figure 1 A-A section view in.

[0015] Figure 3 It is a partial exploded view showing the structure for engaging the external terminal with the connection terminal.

[0016] Figure 4 This is an exploded view showing details of the cover, terminal block, and external terminals.

[0017] Figure 5 This is an exploded view showing details of the insulator, terminal blocks, and connection terminals.

[0018] Figure 6 FIG. 1 is a diagram showing the engagement of the external terminal and the connection terminal during assembly.

[0019] Figure 7 FIG. 2 is a diagram showing the engagement of the external terminal and the connection terminal during assembly. DETAILED DESCRIPTION

[0020] The following describes an embodiment of a motor with reference to the accompanying drawings. It should be noted that the present invention is not limited to this embodiment. Furthermore, the dimensional relationships and proportions of the components in the accompanying drawings may sometimes differ from those in reality. The accompanying drawings may also include portions with different dimensional relationships and proportions. Furthermore, the contents described in one embodiment or modification also apply, in principle, to the other embodiments and modifications.

[0021] Figure 1 This is a perspective view of the appearance of the motor 1 according to one embodiment. Figure 1 In the embodiment, the motor 1 includes a generally cylindrical housing 2 and a cover 3 covering the open end of the housing 2. The housing 2 and the cover 3 are formed of, for example, a metal material. The shaft 4 is exposed from a protrusion 3a in the center of the cover 3. Furthermore, a boss 13a formed of an insulating material such as resin protrudes from the cover 3, and an external terminal 14 formed of a metal material is exposed from the boss 13a.

[0022] Figure 2 Motor 1 Figure 1 The A-A section view in the figure. Figure 2 In the case 2, on the side opposite to the cover 3 ( Figure 2 A bearing 5 is provided inside the central protrusion 2a (lower side of the center), and a bearing 6 is provided inside the protrusion 3a of the cover 3. Shaft 4 is rotatably supported by bearings 5 ​​and 6. Furthermore, shaft 4 is biased from bearing 5 toward bearing 6 by a spring 7. Note that a sleeve 4a is provided on the outer circumferential surface of shaft 4 on the bearing 5 side.

[0023] A substantially cylindrical rotor yoke 8 is fixed to the outer circumference of the shaft 4 near the center. A substantially cylindrical magnet 9 is fixed to the outer circumference of the rotor yoke 8. The shaft 4, rotor yoke 8, and magnet 9 form a rotor.

[0024] Stator core 10 having a core back and teeth is fixed to the inner circumference of housing 2. Stator coil 12 is wound around the teeth of stator core 10 via insulators 11A and 11B. Stator core 10, insulators 11A and 11B, and stator coil 12 form a stator.

[0025] On the other hand, a terminal block 13 is provided inside the cover 3. A boss portion 13a, which is part of the terminal block 13, protrudes outward from the cover 3. External terminals 14 are inserted into the boss portion 13a. Furthermore, connection terminals 15 are provided on the insulator 11A. When the motor 1 is assembled, the external terminals 14 on the cover 3 side engage with the connection terminals 15 on the insulator 11A side, forming an electrical connection.

[0026] External terminals 14 are connected to the outside of motor 1, and connecting terminals 15 are connected to the ends of the wires forming stator coil 12 by welding or binding. External terminals 14 are an example of a first terminal. Connecting terminals 15 are an example of a second terminal. The structure in which external terminals 14 and connecting terminals 15 engage is an example of a terminal portion.

[0027] Figure 3 1 is a partial exploded view showing the structure for engaging the external terminal 14 with the connection terminal 15. Figure 3 The figure shows a situation where the first component and the second component are in a separable state, and other components are omitted, wherein the first component is assembled as a whole by the cover 3, the terminal seat 13 and the external terminal 14, and the second component is assembled as a whole by the insulator 11A, the wiring terminal 15 and the connecting terminal 16.

[0028] Figure 4 This is an exploded view showing details of the cover 3, the terminal base 13, and the external terminal 14. Figure 3 An exploded view of the first component in which the cover 3, the terminal base 13 and the external terminal 14 are integrally assembled.

[0029] exist Figure 4In the figure, a roughly circular cover 3 with a protrusion 3a at the center is provided with a plurality of (three in the example shown) hole portions 3b on the flat portion of the circular plate. In addition, in the figure, a plurality of (three in the example shown) boss portions 13a protrude from the bottom of the terminal base 13 in the shape of an inverted dish. The boss portion 13a is provided with a hole portion 13b for inserting the pin portion 14a of the external terminal 14. On the side of the external terminal 14 opposite to the pin portion 14a, a clamping portion 14b in the shape of two bent wings is provided. In addition, on the side of the terminal base 13 opposite to the direction in which the boss portion 13a protrudes, a convex portion 13c extending from the base of the boss portion 13a to between the clamping portion 14b of the external terminal 14 is provided.

[0030] Furthermore, the pin portion 14a of the external terminal 14 is inserted into the hole portion 13b of the boss portion 13a of the terminal base 13, and the boss portion 13a of the terminal base 13 is inserted into the hole portion 3b of the cover 3, forming a Figure 3 The first member is shown on the upper side.

[0031] Figure 5 This is an exploded view showing details of the insulator 11A, the terminal 15, and the connecting terminal 16. Figure 3 Exploded view of the second component in which the insulator 11A, the terminal block 15 and the connecting terminal 16 are integrally assembled.

[0032] exist Figure 5 In the example, multiple (five in the illustrated example) holes 11a are provided on the end surface of the insulator 11A that does not contact the stator core 10. Furthermore, the multiple (three in the illustrated example) connection terminals 15 each have a protrusion 15a and a protrusion 15b forming a recess 15c into which the protrusion 13c of the terminal block 13 is inserted; a connection portion 15d connected by welding or crimping; and a base portion 15e inserted into the insulator 11A. The protrusions 15a and 15b are examples of deformed engaging portions.

[0033] The connection terminal 16 is provided with: a connection portion 16a, a connection portion 16b, which are connected by welding or binding; and a base portion 16c, a base portion 16d, which are inserted into the insulator 11A. In addition, the base portion 15e of the connection terminal 15 and the base portions 16c, 16d of the connection terminal 16 are inserted into the hole portion 11a of the insulator 11A, forming a Figure 3 The second member is shown on the underside.

[0034] Figure 6 and Figure 7 It is a diagram showing how the external terminal 14 and the connection terminal 15 are engaged during assembly. Figure 6Figure 3 shows the external terminal 14 on the cover 3 side and the connection terminal 15 on the insulator 11A side separating and gradually approaching each other. As the cover 3 approaches the insulator 11A, the protrusion 13c of the terminal block 13 inserts into the recess 15c of the connection terminal 15, and the protrusions 15a and 15b of the connection terminal 15 are inserted between the protrusion 13c of the terminal block 13 and the engaged portion 14b of the external terminal 14. The protrusion 13c of the terminal block 13 serves as a positioning mechanism during the insertion process, ensuring that the external terminal 14 and connection terminal 15 are accurately positioned and engaged.

[0035] Figure 7 The diagram shows the state in which the external terminal 14 and the connecting terminal 15 are engaged. The recess 15c between the protrusions 15a and 15b of the connecting terminal 15 is squeezed outward by the protrusion 13c of the terminal seat 13 (the recess 15c is open to the outside) and is pressed against the engaged portion 14b of the external terminal 14. Therefore, the electrical connection between the external terminal 14 and the connecting terminal 15 is reliably performed.

[0036] As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, Various changes can be made within the range which does not deviate from the summary.

[0037] As described above, the motor of the embodiment includes a cover and a housing provided with the cover, the cover is provided with a first terminal, the housing is provided with a second terminal, and the first terminal and the second terminal engage to form a terminal portion.

[0038] It should be noted that motor terminals are generally made of metal plates of a specified thickness. Therefore, if a thinner outer layer is required, using a thinner metal plate will also reduce the thickness of the inner layer, sometimes making it impossible to ensure the required thickness for welding. Furthermore, in order to change the thickness and shape of the outer layer without changing the thickness of the inner layer, processing such as chamfering is required, which may increase costs and reduce dimensional accuracy.

[0039] In the motor of the embodiment, the first terminal and the second terminal are independent components, so there is no need to use metal plates of the same thickness, etc. The first terminal can be set as a terminal corresponding to the requirements of the consignee, etc. and the second terminal can be set as a terminal suitable for welding, binding, etc., thereby improving design freedom.

[0040] Furthermore, it is possible to suppress the occurrence of defects caused by the second terminal being too thick to be connected by welding or crimping, thereby improving productivity.

[0041] Furthermore, terminals that meet the requirements of the consignee can be quickly and easily prepared as first terminals, and the labor required for processing such as chamfering can be reduced without causing a decrease in dimensional accuracy.

[0042] Furthermore, when winding the coil, the nozzle (the opening for discharging the conductive wire) of the winding device does not interfere with the first terminal, thereby improving the winding workability.

[0043] Furthermore, the first terminal is connected to the outside of the motor, and the second terminal is connected to the wire forming the coil by welding or binding. Thus, the first terminal can be set as a terminal dedicated to connecting to the outside, and the second terminal can be set as a terminal dedicated to connecting to the coil.

[0044] Furthermore, the first component is formed by integrally assembling the first terminal and the cover, and the second component is formed by integrally assembling the housing and the second terminal. The first component and the second component are separable. Thus, the first terminal and the second terminal can be engaged during the assembly of the first component and the second component.

[0045] Furthermore, the second terminal has a deformable engaging portion, and the first terminal has an engaged portion, and the engaging portion engages with the engaged portion. Thus, the first member and the second member can be reliably engaged by deformation of the second terminal.

[0046] In addition, the cover has a convex portion, and the engaging portion of the second terminal is accommodated inside the engaged portion of the first terminal and has a convex portion with a concave portion in the center. Thus, the convex portion of the cover and the convex portion of the engaging portion can contact each other, thereby achieving a positioning function.

[0047] Furthermore, by inserting the convex portion of the cover into the concave portion of the engaging portion, the concave portion of the engaging portion is opened outward, and the convex portion of the engaging portion is engaged with the engaged portion.

[0048] Furthermore, the present invention is not limited to the above-described embodiments. Motors constructed by appropriately combining the above-described technical features are also encompassed by the present invention. Furthermore, those skilled in the art can readily derive further effects and variations. Therefore, the broader aspects of the present invention are not limited to the above-described embodiments and can be modified in various ways.

[0049] Description of Reference Numerals

[0050] 1: Motor; 2: Housing; 3: Cover; 4: Shaft; 5, 6: Bearings; 7: Spring; 8: Rotor yoke; 9: Magnet; 10: Stator core; 11A, 11B: Insulators; 12: Stator coil; 13: Terminal block; 13a: Boss; 13b: Hole; 13c: Protrusion; 14: External terminal; 14a: Pin; 14b: Engaged portion; 15: Connection terminal; 15c: Recess; 16: Connecting terminal.

Claims

1. A motor comprising: Cover; and a housing provided with said cover, The cover is provided with a first terminal, The housing is provided with a second terminal, The first terminal and the second terminal are engaged with each other to form a terminal portion. The second terminal has a deformed engaging portion, The first terminal has an engaged portion. The cover has a convex portion arranged inside the engaged portion, The engaging portion of the second terminal is arranged between the engaged portion and the convex portion, and the convex portion of the cover is arranged in the concave portion of the engaging portion. The engaging portion engages with the engaged portion.

2. The motor according to claim 1, The first terminal is connected to the outside of the motor, The second terminal is connected to a conductive wire forming a coil by welding or binding.

3. The electric motor according to claim 1 or 2, comprising: a first member formed by integrally assembling the first terminal and the cover; and The second component is formed by integrally assembling the housing and the second terminal. The first member and the second member are separable.

4. The motor according to claim 1 or 2, The cover has a terminal holder for holding the first terminal, The terminal base includes the protrusion located inside the engaged portion.

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