JPH04112638A - Motor fixing board - Google Patents

Abstract

PURPOSE:To increase freedom in the lead-out angle of lead wire or motor terminal by additionally tightening the edge part of motor case with respect to the outer periphery of flat part, in an area other than the fixing part, thereby additionally tightening the fixing board at an arbitrary position in the circumferential direction. CONSTITUTION:A motor case is formed by deep drawing a nonmagnetic material such as a copper plate into a drum and a fixing board 42 is coupled through additional tightening to the open edge of the motor case 40. The fixing board 42 is made of magnetic material such as steel plate and also serves as an end board of the motor case 40. Coils 21, 25, control sensors in the motor, and the like require connection with external circuits and thereby notches 43 for leading out the motor terminal or lead wires are provided. One or two additional tightening positions are selected, respectively, within areas A-A and B-B and total two or four positions are selected. According to the constitution, freedom is increased in the lead-out angle of the lead wire or the motor terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a mounting plate for mounting a motor on equipment that uses the motor.

[Prior Art] A typical motor is provided with a mounting plate for mounting the motor on equipment.

The second mounting plate is generally fixed by crimping or the like to the open edge of the motor case for housing the motor components, and in many cases also serves as an end plate that covers the inside of the motor.

Fig. 3 is a longitudinal sectional view taken along the line ■-■ in Fig. 4, illustrating a motor having a conventional mounting plate, and Fig. 4 is a front view of the motor shown in Fig. 3, viewed from the mounting plate side. It is.

3 and 4, a motor case 10 is formed by deep drawing a magnetic material such as a steel plate into a drum shape, and a mounting root 12 is connected to the open end of the motor case 10 by caulking. .

The mounting plate 12 also serves as an end plate that is a lid of the motor case 10.

A motor shaft 15 is rotatably supported at the center of the motor case 10 and the attachment root 12, and a rotor 17 having a rotor magnet is fixed to a position of the motor shaft 15 inside the motor case 10. There is.

Excitation means for applying magnetic rotational force to the rotor 17 is arranged inside the motor case 10.

The excitation means of the illustrated stepper motor consist of two stator units 18.19 with coils 21.25 arranged axially next to each other.

In addition, in the illustrated example, each of the stator units is
It is constructed using the motor case 10 and the mounting plate 12 themselves made of magnetic material.

Each of the coils 2J and 25 and a control sensor (not shown) in the motor need to be connected to an external circuit, so the motor case 10 has a notch 11 for pulling out the motor terminals and lead wires. It is formed.

Attachment portions 28 and 28 for attaching the motor to equipment are formed at two locations in the circumferential direction of the attachment plate 12.

A mounting hole 29 is formed in this mounting portion.

Therefore, in the past, the mounting plate 12 was attached to the motor case 1.
0, the attachment part 28.28
Crimp portions 30 are formed at multiple locations (four locations in the illustrated example) on the outer peripheral edge of the other portions by squeezing or cutting down, and each caulking portion 30 is depressed one step below the edge of the motor case 10. After the mounting plate 12 is mounted in this state, the end edge of the motor case is crimped.

[Technical problem to be solved by the invention] However, in the conventional structure of the attachment root 12 as described above, the caulking part 30
Since it is necessary to form the mounting portion 28 in advance, the position at which the mounting portion 28 is crimped is restricted.

For this reason, when the motor is attached to a device or the like, there is a problem in that there is little freedom in the drawing angle of the lead wire from the motor or one terminal of the motor with respect to the mounting portion 28.

Furthermore, since the crimped part 30 is depressed inward from the edge of the motor case 10, a recess for the crimped part 30 is formed in the internal winding bobbin, or the bobbin is moved away from the edge of the motor case. Therefore, in motors of the same size, the winding capacity is reduced, which is disadvantageous in terms of motor performance.

Furthermore, in a stepping motor having a structure in which the mounting plate 12 is cut and raised to integrally form the yoke pole teeth as shown in the figure, the selection of the lead wire and motor terminal pull-out angle is determined by (360 degrees ÷ number of teeth). In other words, when the number of pole teeth is 12, it is not only necessary to shift the position by 30 degrees, but also to take into consideration the position of the crimping part 30. There was also the problem of less freedom.

In order to solve this problem of reduced degree of freedom in the drawing angle of lead wires, etc., in the case of a stepping motor, for example, a separate yoke can be added inside the mounting plate 12, but in such a structure, parts The number of points will increase and the cost will increase.

The present invention has been made in view of the above-mentioned conventional technical problems, and it is possible to tighten the mounting plate at any position in the circumferential direction, and the drawing angle of the lead wire and motor terminal can be adjusted. It is an object of the present invention to provide a mounting plate for a motor that can increase the degree of freedom and also sufficiently increase the winding capacity in the radial direction to improve motor performance.

Means for Solving Problem CtJ1] The present invention provides a motor mounting plate that is coupled to an open end edge of a motor case by crimping, a flat portion that fits into the inner circumferential surface of the motor case, and a flat portion that fits into the inner circumferential surface of the motor case. a mounting part formed at a part of the outer periphery of the motor case at a higher position than the open edge of the motor case, and the end edge of the motor case is applied to the outer periphery of the flat part in an area other than the mounting part. By adopting a tightening configuration, the mounting plate can be tightened at any position in the circumferential direction, increasing the degree of freedom in the drawing angle of the lead wire and motor terminal.
Furthermore, the present invention provides a motor mounting plate that can sufficiently increase the winding capacity in the radial direction to improve motor performance.

〔Example〕

FIG. 1 is a longitudinal sectional view taken along line I-■ in FIG. 2 of a motor equipped with a mounting plate according to an embodiment of the present invention;
FIG. 2 is a front view of the motor shown in FIG. 1, viewed from the mounting plate side.

In FIGS. 1 and 2, a motor case 40 is formed by deep drawing a magnetic material such as a steel plate into a drum shape, and an attachment plate 42 according to an embodiment of the present invention is attached to an open edge of the motor case 40. are not joined together by caulking.

The mounting plate 42 is also made of a magnetic material such as a steel plate, and in the illustrated example, also serves as an end plate of the motor case 40.

A motor shaft 15 is rotatably supported by bearings 13.14 provided at the center of the motor case 40 and the mounting plate 42, and a rotor magnet is located at the position of the motor shaft 15 inside the motor case 10. A rotor 17 having a rotor 17 is fixed.

Excitation means is arranged around the rotor 17 in the motor case 40 to rotate the rotor magnet 16 with magnetic force and generate torque on the motor shaft 15.

The illustrated motor is a stepping motor, the excitation means of which consists of two stator units 19 arranged axially side by side.

In the first phase stator unit, the excitation coil 21 wound around the bobbin 20 is connected to the outer yoke 22 and the inner yoke 2.
Similarly, the second phase stator unit 19 has a structure in which an excitation coil 25 wound around a bobbin 24 is held between an inner yoke 26 and an outer yoke 27. There is.

Each yoke 22, 23, 26, 27 has a plurality of (for example, one
The pole teeth (two each) are formed by cutting and raising.

In the illustrated example, the first phase outer yoke 22 is formed by the motor case 40 itself, and its pole teeth are formed by cutting and raising the end face of the motor case.

Further, the second phase outer yoke 27 is attached to the attachment root 42.
The pole teeth are integrally formed by cutting and raising the mounting plate.

Each of the coils 21 and 25 and the control sensor (not shown) in the motor need to be connected to an external circuit, so a notch is provided on the side of the motor case 40 for pulling out the motor terminals and lead wires. 43 is formed.

Attachment portions 4444 for attaching the motor to equipment are formed at two locations in the circumferential direction of the attachment plate 42.

A mounting hole 29 is formed in each mounting portion 44 .

Therefore, the mounting plate 42 has a planar shape as a whole, and its outer periphery is fitted to the inner peripheral surface of the end edge of the motor case 40 with almost no gap.

The attachment portions 44 and 44 provided at two locations on the outer periphery of the flat portion 45 are integrally formed at a position higher than the open end edge of the motor case 40.

In addition, pole teeth 46 of the yoke 27, which are cut and raised inward, are integrally formed in the plane portion 45.

In the illustrated example, twelve pole teeth 46 are formed at a constant pitch on the circumference of a predetermined radius.

The above mounting plate 42 has the mounting portion 44 on the outer periphery.
Areas other than 44, that is, the rainy weather mark line A-A in Fig. 2.
The end edge of the motor case 40 is fastened to the outer periphery of the flat part 45 at an arbitrary position within the area indicated by the rain mark line B-B, thereby connecting it to the motor case 40 in a predetermined position. has been done.

In this case, the crimping positions are, for example, one or two locations in each of the areas A-A and B-H.
A total of 2 or 4 locations will be selected.

According to the embodiment described above, the mounting plate 42 is made into a planar shape and is fitted onto the edge of the motor case 40, and the mounting portion 44 is formed on a part of the outer periphery of the plane portion 45, so that the mounting plate 42 is fitted onto the edge of the motor case 40. It is now possible to select the caulking portion at any position in almost the entire circumferential direction.

Therefore, it is possible to freely set the circumferential positional relationship between the caulking part and the attachment part 44, and it has become possible to easily and freely select the attachment posture of the motor with respect to various devices.

At the same time, the caulking process described above can be performed from any direction on the circumference of the motor case 40 with almost no restrictions on the position of the attachment part 44.
2 can be easily assembled.

When the mounting plate 42 is used for a stepping motor as shown in the figure, the lead wire or motor terminal should be drawn out at an angle equal to 360 degrees divided by the number of pole teeth (30 degrees if the number of pole teeth is 12). ), it is now possible to select any position as long as it is shifted by an amount of

Furthermore, the mounting Fi 42 can be connected simply by caulking the edge of the motor case without forming a partial constriction or cut-down part 30 that enters into the motor case as in the conventional example, so there is no clearance in the bobbin 24. There is no need to provide the mounting plate 42, which makes it possible to sufficiently secure the winding capacity on the bobbin in the radial direction, and is advantageous for motor characteristics.

In addition, in the above embodiment, the case where the temporary mounting of the present invention is applicable to a stepping motor was explained as an example, but the present invention can be applied to various other motors as long as it is a mounting plate that is crimped to a motor case. can also be carried out and similar effects can be achieved.

〔Effect of the invention〕

As is clear from the above description (according to the present invention, in the motor mounting plate that is coupled to the open end edge of the motor case by crimping, a flat portion that fits into the inner circumferential surface of the motor case; a mounting part formed at a part of the outer periphery of the flat part at a position higher than the open edge of the motor case; Since the mounting plate can be tightened at any position in the circumferential direction, the degree of freedom in the drawing angle of the lead wires and motor terminals can be increased, and the winding capacity can be increased. Also provided is a motor mounting plate that can be sufficiently increased in the radial direction to improve motor performance.

[Brief explanation of drawings]

The first part is a longitudinal sectional view taken along the line 1-1 in Fig. 2 illustrating a motor equipped with a mounting plate according to an embodiment of the present invention, and Fig. 2 shows the motor in Fig. 1 from the mounting plate side. 3 is a longitudinal cross-sectional view taken along the line ■-■ in FIG. 4, illustrating a motor equipped with a conventional mounting plate, and FIG. 4 is a view of the motor in FIG. 3 from the mounting plate side. It is a front view. Below, symbols representing main components in the drawings are listed. 15---Motor shaft, 17 19--Stator unit, Bin, 21.25--Coil, Case, 42--Mounting plate, (Motor case), 44 Flat part (Mounting plate ), 4 - rotor, 18. 20.24--Both 40--Motor 43...-Notch mounting portion, 45 6--Pole tooth.

Claims (1)

[Claims] (1) A motor mounting plate that is connected to the open end edge of the motor case by caulking has a flat part that fits into the inner peripheral surface of the motor case, and a part of the outer periphery of the flat part that is attached to the motor case. and a mounting portion formed at a position higher than the open end edge, and the end edge of the motor case is crimped against the outer periphery of the flat portion in an area other than the mounting portion. Board.