JP3064007B2 - Linear motor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a linear motor used for conveyance.

[Conventional technology]

A conventional linear motor of this type will be described with reference to FIG.

This linear motor includes a stator block A and a mover block B.

The stator block A includes a cylindrical guide rail 1, a substantially flat permanent magnet 2 magnetized in the thickness direction such that the longitudinal direction alternately has a different polarity at regular intervals, an insulating portion and its insulating portion. Power supply board 3 provided with a conductive part separated into positive and negative voltages by
The permanent magnet 2 and the power supply board 3 are fixed along the longitudinal direction of the inner wall of the guide rail 1.

The mover block B is wound around the substantially U-shaped iron core 4a having both opposing pieces 4b and 4c and the opposite opposing pieces 4b and 4c of the iron core 4a via coil frames 4d and 4e, respectively, in reverse winding. The three electromagnets 4 having the coil 4f are fixedly arranged in a row on the connecting body 5.
It is formed to have a phase electromagnet device and a brush 6 connected to one end of a coil 4f to a brush holder 6a fixed to one opposing piece 4b of the iron core 4a.

Here, the configuration in which one of the electromagnet 4 and one of the brushes 6 is fixed to the connecting member 5 will be described in more detail. First, the iron core 4a connects the base piece 4g connecting the opposing pieces 4b and 4c to the connecting member 5. Is fitted and fixed to the concave portion 5a provided in
A coil frame 4d, 4e in which a coil 4f is continuously wound in reverse winding is inserted and fixed to both opposing pieces 4b, 4c of the iron core 4a, and then a substantially U-shaped brush holder to which the brush 6 is fixed. 6a is adhesively fixed to the outside of one opposing piece 4b of the iron core 4a.

In the mover block B thus configured, the plate thickness direction of the permanent magnet 2 is interposed between the opposing pieces 4b and 4c of the iron core 4a, and the brush 6 When the positive and negative voltages are applied to the coil 4f by alternately sliding the portions, the stator block A moves in the longitudinal direction of the guide rail 1 of the stator block A.

[Problems to be solved by the invention]

In the above-described conventional linear motor, since the iron core 4a of the electromagnet 4 and the coil frames 4d and 4e are fixed to the connecting body 5 with an adhesive, the adhesive adheres to the periphery and takes time to cure. When the mover block B moves in the longitudinal direction of the guide rail 1 of the stator block A and is used for a long period of time, the effect of heat generated from the coil 4f and vibration at the time of movement occurs. As a result, the adhesive strength of the adhesive may be reduced, and the iron core 4a and the coil frames 4d and 4e may come off from the connecting body 5. If the iron core 4a comes off, the positional relationship of the stator block A with respect to the permanent magnet 2 and the power supply board 3 is broken, and the mover block B does not operate at all, and the coil frames 4d and 4e come off. In such a case, there is a possibility that the brush 6 may come into contact with the lower surface of the adjacent permanent magnet 2 or remove the brush 6 adhered and fixed to the iron core 4a from the iron core 4a. Disturbance may occur.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a linear motor in which the work is easy to fix an iron core and a coil frame to a connecting body, and the fixing is not easily released. It is in.

[Means for solving the problem]

In order to solve the above-described problems, the linear motor of the present invention includes a cylindrical guide rail, and a plate-shaped permanent magnet that is magnetized in the plate thickness direction so that the longitudinal direction alternately has different poles at regular intervals. A power supply board provided with an insulating portion and a conductive portion separated into positive and negative voltages by the insulating portion, and a stator block to which a permanent magnet and a power supply substrate are fixed along the longitudinal direction of the inner wall of the guide rail. A plurality of electromagnets each having a substantially U-shaped iron core having both opposing pieces and coils wound in reverse winding on both opposing pieces of the iron core via a coil frame, respectively, are arranged in a row in a connected body. And a mover block having a brush connected to the coil.The permanent magnet is interposed between the opposed pieces of the iron core in the thickness direction, and the brush is The conductive and insulating parts of the power supply board are alternately slid into contact with the coil In a linear motor in which pressure is applied and a mover block moves in the longitudinal direction of the guide rail, a coil frame flange locking piece that locks on a flange of the coil frame and holds the coil frame on the connecting body is provided on the connecting body. Is provided.

[Action]

According to the linear motor of the present invention, when the iron core of the electromagnet and the coil frame are fixed to the connection body, the coil frame flange locking piece that locks to the flange of the coil frame and holds the coil frame to the connection body is connected to the connection body. After the iron core is attached to the connected body, the coil frame is inserted into both opposing pieces of the iron core and pushed in, and the flange of the coil frame is locked by the coil frame flange locking piece. As a result, the iron core and the coil frame are both fixed to the connecting body with one touch, and are not fixed by an adhesive as in the conventional example, so that the mover block is moved in the longitudinal direction of the guide rail of the stator block. When used for a long period of time, the iron core and the coil frame are unlikely to be detached from the connected body even when affected by heat generated from the coil or vibration during the movement.

〔Example〕

One embodiment of the present invention will be described below with reference to FIGS. Note that members that are substantially the same as those of the conventional example are denoted by the same reference numerals.

This linear motor includes a stator block A and a mover block B.

First, the stator block A is constituted by the guide rail 1, the permanent magnet 2, and the power supply board 3 as follows.

The guide rail 1 is made of a metal material such as aluminum.
As shown in the figure, a guide groove 1a is provided in the center of the lower side, a cross section is formed in a substantially rectangular cylindrical shape, and the inside of the rectangle is a two-stage space divided vertically by a partition 1b having an opening partly. Are formed.

The permanent magnet 2 is formed in a substantially flat plate shape, and one end surface of the plate thickness is fixed to the center of the inner wall of the upper side along the longitudinal direction of the guide rail 1. As shown in FIG. 1, the magnets are magnetized in the plate thickness direction such that the polarity in the longitudinal direction is alternately different at regular intervals. Here, the length of one set of magnet pieces including the N pole and the S pole in the longitudinal direction is L.

As shown in FIG. 6 (a), the power supply substrate 3 is an insulating portion 3a meandering vertically at a central portion of the plate width at regular intervals along the longitudinal direction on one surface of a long flat substrate. The conductive portions 3b and 3c are formed by applying copper plating so that the upper portion of the upper and lower portions separated by the insulating portion 3a becomes the conductive portion 3b of the positive voltage, and the lower portion becomes the conductive portion 3c of the negative voltage. . Here, the width of the insulating portion 3a in the longitudinal direction is L / 6, and the width of the conductive portions 3b and 3c is L / 3. The power supply board 3 is fixed to the inner wall on one side of the guide rail 1 on which the magnetic pole surface of the permanent magnet 2 faces.

Next, the mover block B is configured as follows by an electromagnet device in which three electromagnets 4 are fixed to the coupling body 5 and the brush 5.

The electromagnet 4 has a substantially U-shaped iron core 4 having both opposing pieces 4b and 4c.
a, and a coil 4f continuously wound in reverse winding around each of the coil frames 4d and 4e made of synthetic resin.
The two coil frames 4d and 4e have the same shape, and are formed by providing flanges 4h at both ends of a winding drum on which the coil 4f is wound.

The connecting body 5 is formed of a synthetic resin into a substantially flat plate-like elongated body, and a rectangular recess 5a having the same shape as a base piece 4g connecting the opposed pieces 4b and 4c of the iron core 4a is formed on one surface thereof in the longitudinal direction. Are arranged in three rows. Then, as shown in FIG. 3, a claw piece-shaped coil frame for fixing the coil frames 4d and 4e at the center of four ridges formed on both ends and on one surface between them by three recesses 5a. Collar locking pieces 5b and 5c are provided, respectively. That is, the claw shapes of the coil frame flange locking pieces 5b and 5c are substantially triangular and substantially rhombic, respectively, as shown in FIG. However, as shown in the coil frame flange locking piece 5c), the corners of each side of the triangle and the rhombus are chamfered and the height of the coil frames 4d and 4e is substantially equal to the thickness of the flange 4h. Notch 5d is provided.

Then, after the core 4a has its base piece 4g inserted into the concave portion 5a of the connecting body 5, the coil frames 4d and 4e are attached to the two opposing pieces 4b and 4c
The coil frames 4d and 4e are inserted into the base pieces 4g and pushed into contact with the base pieces 4g, so that the two corners inside the respective flanges 4h have chamfers provided on the coil frame flange locking pieces 5b and 5c. It fits into the notch 5d with one touch while flexing along. At this time, Tsuba
The inner two corners of 4h are in contact with the inner wall of the notch 5d, and the thickness of the flange 4h and the height of the notch 5d are substantially equal, so the coil frames 4d and 4e are made of iron. It is fixed to the connecting body 5 together with the core 4a. Thus, 3
The plurality of electromagnets 4 are arranged and connected to the connecting body 5.

The brush 6 is formed by fixing a contact to a tip end of a conductive plate bent in two steps in the opposite direction to each other, and has a base end formed of an iron core.
The coil 4f is screwed and fixed to a substantially U-shaped brush holder 6a adhesively fixed to the outer surface of the one opposing piece 4b of 4a.
Is connected to one end of each electromagnet 4.

The mover block B is configured as a three-phase electromagnet device in which the other ends of the coils 4f of the three electromagnets 4 are commonly connected. At this time, the length of each electromagnet 4 in the row direction is L / 3 is not exceeded, and the distance between the brushes 6 is L / 3.

The mover block B is provided between the opposing pieces 4b and 4c of the iron core 4a in the upper space of the guide rail 1.
The brush 6 is accommodated in the stator block A with the contact point of the brush 6 positioned so that the central portion of the power supply substrate 3 is slid along the longitudinal direction. On the other hand, guide rail 1
In the lower space, the connecting piece 5g is extended from the connecting body 5 so as to protrude to the outside through the opening of the partition wall 1b and the guide groove 1a, and to move the movable block B of the connecting piece 5g. Rollers 5e are provided for smoothness. A hole 5f for connecting an object to be conveyed such as a curtain, for example, is provided in a portion of the connecting piece 5g protruding outside.

The operation of this linear motor is configured as described above, so that the contact point of the brush 6 slidably contacts the central portion of the power supply board 3 along the longitudinal direction, and the current always flows to any two of the three-phase coils 4f. The positive and negative voltages are applied to the coil 4f so as to flow, for example, in the state of FIG. 6 (b), the propulsive force acting between the magnetic pole of the electromagnet and the magnetic pole of the permanent magnet 2 causes L The mover block B advances in the direction of the arrow by / 6 to reach the state shown in FIG. 11C, and subsequently advances L / 6 six times by the same action to return to the state shown in FIG. In this manner, the mover block B smoothly advances in the longitudinal direction of the guide rail 1 serving as a transport path. When moving the mover block B in the reverse direction, the positive and negative voltages of the conductive portions 3b and 3c of the power supply substrate 3 may be reversed.

In such a linear motor, when the iron core 4a of the electromagnet 4 and the coil frames 4d and 4e are fixed to the coupling body 5, the coil frame 4
Claw-shaped coil frame flange locking pieces 5b and 5c for fixing d and 4e
Is provided on the connecting body 5, so that after the iron core 4a is mounted on the connecting body 5, the coil frames 4d and 4e are connected to the two opposing pieces 4b and 4c
The flange 4h is inserted into the coil frame flange
By being locked to 5b and 5c, the iron core 4a and the coil frame 4
Since d and 4e are both fixed to the connector 5 with one touch,
Since the work can be performed easily and is not fixed with an adhesive unlike the conventional example, the mover block B moves in the longitudinal direction of the guide rail 1 of the stator block A and has been used for a long time. At this time, even if there is an effect of heat generated from the coil 4f or vibration during movement, the iron core 4a and the coil frames 4d, 4
e does not easily come off the connector 5, and the mover block B can operate stably for a long period of time.

In the present embodiment, the claw-shaped coil frame flange locking pieces 5b and 5c for fixing the coil frames 4d and 4e are respectively fitted by two corner portions inside the flange 4h of the coil frames 4d and 4e. Although it is provided on the connecting member 5, if the coil frame flange locking piece is formed on the connecting member 5 so that the four corner portions or the entire circumference of the flange 4h are fitted, the fixing can be more securely performed.

Further, the above-mentioned coil frame flange locking piece is not claw-shaped, but has a concave portion formed in the connecting body 5 and has a flange 4 of the coil frames 4d and 4e on its side surface.
A notch into which h fits may be provided.

〔The invention's effect〕

In the linear motor according to the present invention, when the iron core of the electromagnet and the coil frame are fixed to the connection body, a coil frame flange locking piece that locks to the flange of the coil frame and holds the coil frame to the connection body is provided on the connection body. Therefore, after inserting the iron core into the connecting body, insert the coil frame into both opposing pieces of the iron core and push it in, the flange of the coil frame fits into the coil frame flange locking piece. As a result, both the iron core and the coil frame are fixed to the connecting body with one touch, so that the work can be performed easily, and the mover block is fixed because it is not fixed with an adhesive unlike the conventional example. When moved in the longitudinal direction of the guide rail of the child block and used for a long period of time, the iron core and coil frame are not easily detached from the connected body even if it is affected by the heat generated from the coil or the vibration during the movement. Blocks that can operate stably for a long time It made.

[Brief description of the drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention, FIG. 2 is a partial sectional perspective view of the same, and FIG. 3 is an exploded perspective view showing an engaged state between the electromagnet and the connector. Fig. 4 is a plan view showing a state in which the electromagnet is engaged with the connector, Fig. 5 is a cross-sectional view taken along line XX of Fig. 4, and Fig. 6 (a) is a power supply board of the same. Showing a front view,
(B), (c) is an explanatory view showing an operation state of the above mover block, and FIG. 7 is a sectional front view showing a conventional example. A: Stator block, 1: Guide rail, 2: Permanent magnet, 3: Power supply board, 3a: Insulating section, 3b, 3c: Conducting section, B: Mover block, 4: Electromagnet , 4a ... iron core, 4b, 4c ... both opposing pieces of iron core, 4d, 4e ... coil frame, 4f ... coil, 5 ... connecting body, 5b, 5c ... coil frame flange locking piece, 6 ... Brush.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-26446 (JP, A) JP-A-60-26424 (JP, A) Fully open 1986-35583 (JP, U) Fully open 107262 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02K 41/02 H02K 41/035 H02K 3/46

Claims (1)

(57) [Claims] 1. A cylindrical guide rail, a plate-shaped permanent magnet magnetized in the thickness direction so that the longitudinal direction alternately has a different polarity at regular intervals, an insulating portion, and a positive / negative voltage by the insulating portion. A power supply board provided with a separated conductive portion, a stator block to which a permanent magnet and a power supply board are fixed along the longitudinal direction of the inner wall of the guide rail; and a substantially U-shaped having both opposing pieces An electromagnet device in which a plurality of electromagnets each having an iron core and coils wound in reverse winding on both opposing pieces of the iron core via a coil frame are fixedly arranged in a row on a connecting body, and connected to the coil. And a mover block having a permanent magnet, wherein the thickness direction of the permanent magnet is interposed between the two opposing pieces of the iron core, and the brush alternates the conductive part and the insulating part of the power supply substrate. The positive and negative voltages are applied to the coil by sliding contact, and the mover block is In the linear motor to move in the longitudinal direction, a linear motor, characterized in that the engaged to the collar of the coil frame the coil frame the coil frame flange locking piece to be held in the coupling body, provided on the connecting member.