JP2944298B2 - Linear motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor, and more particularly, to an improvement in a connection portion of a coil terminal to which a lead portion of a coil is connected.

[0002]

2. Description of the Related Art A linear motor has a configuration in which a squirrel-cage motor is developed, and its structure is shown in FIG.

[0003] The linear motor is largely divided into a primary core 1 and a secondary conductor 2, and has a long secondary structure in which the secondary side is longer than the primary side. The secondary side serves as a stator, and the primary side serves as a traveling element, and an air gap 3 is formed therebetween.

As shown in FIG. 4 (a), the primary core 1 is composed of a core group 5 in which thin core plates 4 made of a magnetic material are laminated, for example, arranged radially along a circle into four, and a ring shape. It is sandwiched between a pair of flanges 6 and connected with a plurality of through bolts 7 and nuts (not shown). A wheel 12 is rotatably provided in the flange 6. The core plate 4 is formed in a comb shape having teeth 4a by providing a plurality of slots 8 in the length direction. A coil 9 surrounding the secondary conductor 2 is accommodated in the slot 8.

On the other hand, the secondary conductor 2 is formed by covering the outer peripheral surface of a round rod-shaped magnetic conductor 10 with a nonmagnetic conductor 11.

The coils 9 accommodated in the respective slits 8 of the primary side core 1 each have a pair of outlets 13 as shown in FIG. 4, and these outlets 13 are as shown in FIG. Are connected using three types of complicatedly bent connection plates 14a, 14b, and 14c. Here, two coils 9 correspond to each of the U-phase, V-phase, and W-phase, and the winding direction of each coil 9 is the same. For example, in the case of the U-phase, the lead portions 13 of the coils 9 in the U-phase are connected to each other via the connection plate.

[0007]

However, it is necessary to use three types of connecting plates bent in a complicated shape for connecting the lead portions of the coil, and the bending operation is troublesome since the bending must be performed manually. It is complicated. In addition, since both ends of the connection plate must be soldered to the lead-out part, work is necessary because the lead-out part and the connection plate need to be pre-soldered and the joining surfaces of both must be in contact with no gap. However, it is troublesome and a lot of time is required for soldering in one place. Furthermore, when the linear motor is operated for a long time, the temperature of the coil rises and the solder approaches the melting point temperature, so that the strength of the connecting portion may be reduced.

Therefore, an object of the present invention is to provide a linear motor that solves the above problem.

[0009]

In order to achieve the above object,
The structure of the present invention surrounds a long secondary conductor.
Provided on the primary core and along the secondary conductor
That connect the outlets of multiple coils
In the motor, each lead in the three-phase coil
Are connected in the same phase in the circumferential direction.
And the outlets of different phases are circumferentially relative to each other.
At different locations, and at the same circumferential position
Orient the outlets of the same phase to the outside in the radial direction.
Connected via a U-shaped connecting conductor
The connection is performed by crimping the respective outlets and the ends of the connection conductors.
It is characterized in that the connection is performed by means of pressure bonding via a member. Contact
Only the two ends of the continuity conductor were bent in the same direction to form a U-shape.
The crimping member between the lead of the coil and the end of the connection conductor.
For crimp connection.

[0010]

Since the connecting conductor which does not involve complicated bending work by hand is used, the assembling work of the linear motor is easy. Further, since the connecting conductor has a U-shape and has bent portions at both ends, the connection between the lead portion of the coil and the connecting conductor can be performed by crimping using a crimping tool. Therefore, the connection operation can be performed in a short time. On the other hand, even if the temperature of the outlet rises by operating the linear motor for a long time,
No connection failure occurs due to the crimp connection.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. In this embodiment, since a part of the conventional linear motor is improved, the same parts as those of the conventional linear motor are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.

FIGS. 1 (a) and 1 (b) show a configuration of a connection portion of a coil terminal in a linear motor according to the present invention. As shown in FIG. 1 (b), the coil 9 has a U-phase
The phase and the W-phase are repeatedly arranged, and two coils 9 are provided for each phase.

Two coils 9 are provided for each phase, and a pair of lead portions 13 of each coil 9 are dispersed in the circumferential direction of the coil 9 as shown in FIG. At the same position in the circumferential direction. Outlet 1 in circumferential direction
Assuming that the arrangement positions of 3 are 1 to 5 from the top in FIG.
The U-phase occupies 2 and 4, the V-phase occupies 1 and 3, and the W-phase occupies 3 and 5.

Here, although the winding directions of the coils of the respective phases are the same and current must flow in the same rotational direction, they extend in an oblique direction as shown in FIG. 4B. Since only the connecting plate extending in the left-right direction in the drawing is used without using the connecting plate 14b, as shown by a two-dot chain line, one of the coil 13 in each phase has the other lead 13 Are radially guided with respect to the coil 9 before turning, and radially guided after turning (or a similar state can be obtained by changing the bending angle of the lead portion 13). Are provided. In addition, in order to make understanding easy, it turned around, but in reality it is wound several times.

The above-mentioned two types of coils 9 are used in each phase. For example, adjacent U-phases and U-phases are arranged with the left and right coils 9 reversed. This is the same for the coils of the other phases. As a result, the position of the outlet 13 in the circumferential direction is changed for each phase using two types of coils.

To adjust the direction of current flow to the lead portions 13 arranged in this way, for example, different lengths are used for connecting the lead portions 13 of adjacent coils in the U-phase. Shorter connection plate (connection conductor) 15b, 15
c and a longer connection plate 15a for connecting the lead portions 13 of the coil between adjacent U phases.
These three types of connection plates are similarly used for connection of coils of other phases.

The connection plate 15b has a U-shape as shown in FIG. 2 (b), and the other connection plates 15a and 15c are longer or shorter in the left-right direction than the connection plate 15b. . The reason why both ends are bent to form a U-shape is to press-connect the lead portion 13 and both ends of the connection plate using a crimping tool. The bending at both ends can be performed mechanically by punching with a press or the like. The ends of these connecting plates and the outlet 1
As shown in FIG. 2 (b), they are connected by crimping together with a pipe-shaped crimping member 16 covering both of these members.

Next, the operation of the linear motor will be described. FIG. 2A shows how to connect the outlet 13 of each coil 9 to the end of the connection plate. Since the outlet 13 protrudes in the radial direction from the outer peripheral portion of the coil 9, FIG.
As shown in FIG. 2 (b), one crimping member 16 is placed over the lead portion 13 and, for example, the end of the connection plate 15b, and as shown in FIG.
By pressing the crimping member 16 between these members and crimping these three members, the lead portion 13 and the connection plate 15b are joined. As shown in FIG. 2 (a), the socket 18 of the crimping tool 17 can be inserted from above or below in the figure to connect all the outlets 13.

On the other hand, when the linear motor is operated for a long time, the temperature of the outlet 13 also rises with the rise of the temperature of the coil 9, but the outlet 13 and the connection plates 15a, 15b, 15c
Since the connection is performed by crimping, there is no need to worry about a decrease in the strength of the connection portion when brazing is performed.

[0020]

As can be seen from the above description, claim 1
According to the linear motor according to the above, since the lead portions of the same phase at the same position in the circumferential direction are connected to each other, it is not necessary to manually bend the connection conductor into a complicated shape, and the assembling work is easy, The shape of both ends of the U-shaped connection conductor can be easily formed by machining. In addition,
Since the connection conductor and the connection conductor are joined by crimping, there is no need for soldering as in the related art, so that labor can be saved and the assembly time of the linear motor can be reduced. In addition, unlike soldering, which is a manual operation, which tends to cause individual differences in the finish, the crimping operation is performed mechanically, so that the quality after the finish is uniform.

In addition, even when the temperature of the coil rises when the linear motor is operated for a long time, there is no fear that the solder may be melted to cause poor connection as in the case of soldering.

[Brief description of the drawings]

FIG. 1A is a front view of a linear motor, and FIG. 1B is a left side view showing a main part according to the present invention.

2 (a) is an explanatory view of a crimping operation, and FIG. 2 (b) is a view taken along the line AA of FIG. 2 (a) according to the present invention.

FIG. 3 is a configuration diagram of a conventional linear motor.

FIG. 4A relates to a conventional linear motor, and FIG.
FIG. 4B is a left side view showing a main part of FIG. 4A.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Primary core, 2 ... Secondary conductor, 9 ... Coil, 13 ...
Exit parts, 15a, 15b, 15c: connecting plate, 16: crimping member.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masayuki Kawaguchi 2-1-1-17 Osaki, Shinagawa-ku, Tokyo Inside Meidensha Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) H02K 41/02- 41/035

Claims (1)

(57) [Claims] 1. A linear motor provided on a primary core provided surrounding a long secondary conductor and interconnecting lead portions of a plurality of coils arranged along the secondary conductor. The same phase connecting each lead in a three-phase coil
Are located at the same position in the circumferential direction and have different phases.
Are distributed at relatively different positions in the circumferential direction
Ports of the same phase placed at the same position in the circumferential direction
With the protruding parts facing outward in the radial direction,
Are connected via connection conductors formed in
Crimping connection between the outlet of the cable and the end of the connection conductor via a crimping member
A linear motor characterized by being combined .