JPH022384B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a guiding device for a moving body such as a moving element of a linear pulse motor suitable for use, for example, in feeding the head of a floppy disk device.

[Prior art]

For example, linear pulse motors used in floppy disk devices and the like are required to be smaller, less expensive, and thinner. Therefore, the applicant of the present invention previously filed an application for ``Support Mechanism for a Moving Element in a Linear Pulse Motor'' (Japanese Patent Application No. 59-47863) as a device capable of achieving both of these demands. Hereinafter, first, the content of this invention will be explained.

FIG. 7 is a perspective view showing an example of the configuration of the linear pulse motor according to the invention of the prior application. In this figure, reference numeral 1 denotes a mover, 2 a stator, and a comb-shaped tooth portion 1a is formed on the lower surface of the mover 1. Next, in the stator 2, numerals 3 and 4 are coils, 5 and 6 are cores, and the ends of the core 5 are provided with comb-like magnetic poles 5a and 5b, and the end of the core 6 is provided with comb-like magnetic poles 5a and 5b. magnetic poles 6a and 6b are formed, respectively. 7 is a permanent magnet, 8 and 9 are guide members, and these guide members 8 and 9 form a travel path for the moving element 1. The guide surface member 8 is supported slidably in the width direction of the running path by pins 11 and 12 vertically provided on the upper surface of the core 5, and both ends abut against the pins 11 and 12, and the center The part is the guide member 8
A leaf spring 13 that comes into contact with the travel path is biased in a direction that spans the width of the travel path. In addition, the guide member 9
is fixed to the upper surface of the core 6 by pins 14 and 15. Between the guide member 9 and the magnetic poles 6a, 6b, rollers 17, 18 and balls 19,
A retainer (holding member) 21 having a diameter of 20 is mounted. A similar retainer is also placed between the guide member 8 and the magnetic poles 5a, 5b. Incidentally, FIG. 8 shows the mounting structure of the roller 18 and the ball 20. As shown in the figure, the ball 20 is
It is loosely fitted into a recess 23 whose inner surface is formed into a spherical shape. In addition, 24 in FIG. 7 is the retainer 2.
This is a stopper that restricts the movement of 1.

In the above configuration, the mover 1 is connected to the magnetic poles 5a, 5
When the slider 1 is placed on the rollers 17 and 18 of the retainer 21, both sides of the lower surface of the slider 1 come into contact with the rollers 17 and 18 of the retainer 21, and the both side edges thereof come into contact with the rollers 19 and 20. The tooth portion 1a and the magnetic poles 5a to 6b face each other with a slight gap therebetween. Here, coil 3,
When a predetermined pulsed current is supplied to the stator 4, the mover 1 moves on the stator 2 in a stepwise manner.

[Problem that the invention seeks to solve]

Although the above-mentioned linear pulse motor is extremely superior in that it can be constructed in a small size, low cost, and thin shape, it still has the following problems. That is, in the above linear pulse motor, when the mover 1 moves,
Along with this, the retainer 21 also moves. The amount of movement of this retainer 21 is theoretically 1/2 of the amount of movement of the mover 1. However, during actual operation, due to the flatness of the surfaces that the rollers 17 and 18 come into contact with, the machining accuracy such as surface roughness, or disturbances caused by dirt, dust, and even scratches that adhere to the surfaces. , there will be a difference in the amount of movement on the way out and on the way back. Therefore, when the operation is performed for a long time, the above-mentioned difference in reciprocating is accumulated, and the position of the retainer gradually changes to its original position (that is, 1/2 of the amount of movement of mover 1).
position), the moving stroke of the moving element 1 cannot be ensured, and in the worst case, the moving element 1 may become unable to move.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a guide device for a movable body such as a retainer in which the position of the movable body does not deviate significantly from its original position.

[Means to solve the problem]

The present invention provides a movable body in which both side surfaces and lower side portions adjacent to these side surfaces are formed flat and parallel to the direction of movement, and a guide surface for guiding an object in a linear direction on both sides of the movable body. and a fixed body provided parallel to each other on the side of the lower surface, and a rolling element that rolls between the side and lower side of the movable body and the guide surface facing them and supports the movable body. , a holding member that holds the rolling element and moves as the rolling element rolls, and is coupled to all of the fixed body, movable body, and holding member via a rotating pair and a sliding pair, or any one of the holding members It is connected to the other two through a rotating pair and a sliding pair, and the rotation centers of each of these connections are located on a straight line, and the distance from the center rotation center to the rotation centers at both ends is It is characterized by having an equal link.

〔Example〕

FIG. 1 is a perspective view showing the appearance of a linear pulse motor according to an embodiment of the present invention, and FIGS. 2A to 2C are a plan view, a front view, and a right side view of the same linear pulse motor, respectively. In these figures, the reference numeral 30 indicates a toothed portion 30 on the lower surface, similar to the mover 1 shown in FIG.
A movable element 31 is formed with a symbol a, and a movable element 31 is constructed in substantially the same manner as the stator 2 shown in FIG. In this stator 31, comb-shaped magnetic poles are formed at positions facing the teeth 30a of the mover 30.
This magnetic pole is excited by coils 33 and 34. Moreover, 35 and 36 are mover guide members, respectively. Further, 38 and 39 are retainers inserted between the mover 30 and the stator 31, and the third
As shown in the figure, rollers 40, 41 and ball 4
1,41. In this case, roller 4
0 and 40 roll on the upper surface of the stator (fixed body) 31, that is, the upper surface of the core 5 shown in FIG. It rolls using the opposing sides of 36 as guide surfaces.

Next, parts related to the gist of the invention will be explained. Pins 44, 45, 46 each having a T-shaped longitudinal section are vertically provided on the upper surface of the above-mentioned slider 30 and the upper surfaces of the slider guide members 35, 36, and are provided on the retainers 38, 39, respectively. , ball 41
Round bar-shaped pins 47 and 48 are vertically provided on the upper surface of a holding member 42 (see FIG. 3) that holds the. And link 5 between pins 44, 47, 45
0 (regulating member) is also pins 44, 48, 46
A link 51 (regulating member) is engaged between them. FIG. 4 shows the mounting positions of pins 44, 47, and 45, the structure of link 50, and link 50 and pin 4.
4, 47, and 45. FIG. As shown in this figure, the pins 44 and 45 are respectively pin 47 when the mover 30 and the retainer 38 are both in the central position of the stator 31.
The pin 44 is attached to the center of the slider 30 in the left-right direction, and the pin 45 is located at the right end of the slider guide member 35,
The distance from pin 47 is the distance between pins 44 and 47 l1
is installed at a position equal to Also, link 5
0 has a round hole 50a with a diameter slightly larger than the diameter of the pin 44 at one end, and a long hole 50b at the center.
A long hole 50c is formed at the other end, and a pin 44 is inserted into the round hole 50a, and pins 47 and 45 are inserted into the long holes 50b and 50c, respectively. In this case, the pins 47 and 45 are connected to the mover 30 and the stator 3, respectively.
When in the center position of 1, the elongated holes 50b and 50c,
When the mover 30 moves the maximum distance from the center position of the stator 31 and is located at the position S shown in the figure, the position is 500 mm as shown in the figure.
b, 50c. Here, when the mover 30 is located at the position S, the distance between the pins 44 and 47 and the pin 47,
45 is equal (L ₂ ), therefore, the moving distance of the retainer 38 is 1/1 of the moving distance of the mover 30.
It becomes 2.

According to the above configuration, since the movement of the retainer 38 is restricted by the link 50,
The amount of movement is always kept at approximately 1/2 of the amount of movement of the mover 30. Furthermore, the maximum amount of movement of the mover 30 is also regulated by the space between the round hole 50a of the link 50 and the right end of the elongated hole 50c. Note that the mounting position of the pin 46 and the structure of the link 51 are also the same as described above.
Furthermore, the pins 47 and 48 may be formed integrally when the retainers 38 and 39 are molded with resin, or may be erected after molding. Further, a stopper for the mover 30 may be provided separately.

The details of one embodiment of the present invention shown in FIGS. 1 to 4 have been described above. In addition, in the above embodiment, even if the round hole 50a is made into a long hole, the same effect as in the embodiment can be obtained. Further, when using retainers 38 and 39 in which both are integrally formed in a frame shape, one set of mechanisms consisting of pins 44, 47, 45 and link 50 may be provided. Also the fifth
As shown in the figure, pins 54, 55, 56 and link 57, pins 58, 59, 60 and link 6
1 may be provided respectively. In the above embodiment, the long hole 50c may be a round hole, the round hole 50a may be a long hole, or the long hole 50b may be a round hole, and both the round hole 50a and the long hole 50c may be a long hole with the same long diameter. Good too. In short, it is sufficient that at least two of the movable element, the stator, and the connection points with the links are slidable. Furthermore, the locations of the pins and links are not limited to the locations shown in FIG. 2A. Further, in the above embodiment, a link having a hole and a pin are used, but instead of this, a link having protrusions at three places is used, and the movable element 30
Further, a long hole may be formed in the upper surface of the slider guide member 35 and a round hole may be formed in the retainer 38. That is, the movable element guide members (fixed body) 35, 36, the movable element (moving body) 30, and the retainer (holding member) 38,
All of the 39 are connected via rotating pairs and sliding pairs (the elongated hole rotates relative to the pin, and the pin reciprocates relative to the elongated hole), or any one of them Through the rotation couple, the other two
Connected through twisting pairs and sliding pairs,
Further, it is sufficient that the relative rotation centers of these connections are located on a straight line, and the distances from the center rotation center to the rotation centers at both ends are equal. Furthermore, although the above embodiment has a configuration in which links and pins are added to the linear pulse motor shown in FIG. 7, links and pins may be added to the linear pulse motor having the configuration shown in FIG. 6, for example. In FIG. 6, 60 is a mover, 31 is a stator, 62 to 65 are magnetic poles around which coils (not shown) are wound, and 66 and 67 are retainers.

Although all of the above has been described using a linear pulse motor as an example, the present invention is also applicable to slide bearings used in machine tools, etc., since similar deviations occur.

〔Effect of the invention〕

As explained above, according to the present invention, displacement of the retainer can be prevented with an extremely simple configuration. As a result, there is no need to increase the machining accuracy of the surface of the retainer that the rolling elements come into contact with more than necessary, thereby improving the productivity of the linear pulse motor. In addition, according to the embodiments shown in FIGS. 1 and 2, it is also possible to regulate the amount of movement of the mover. As a result, conventionally,
A separately provided mover stopper can be omitted, and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention, FIGS. 2A to 2C are a plan view, a front view, and a right side view of the embodiment, respectively, and FIG. FIG. 4 is a perspective view showing the configuration; FIG. 4 is a plan view illustrating the mounting positions of the pins 44, 47, 45 and the configuration of the link 50 in the same embodiment;
FIG. 5 is a plan view showing the configuration of another embodiment of the present invention, FIG. 6 is a perspective view showing an example of the configuration of a linear pulse motor of a different type from the embodiment shown in FIG. 1, and FIG.
The figure is a perspective view showing an example of the configuration of the linear pulse motor according to the invention of the prior application, and FIG. 8 is a diagram showing the structure of a part of the retainer 21 in the linear pulse motor of FIG. 7. 30...Mover, 31...Stator, 38, 39
...Retainer (holding member), 40...Roller (rolling element), 41...Ball (rolling element), 44-48...
...Pin, 50, 51...Link (regulating member).

Claims (1)

[Scope of Claims] 1. A movable body whose both side surfaces and a lower side portion adjacent to these side surfaces are formed flat and parallel to the direction of movement; and a guide surface that guides an object in a linear direction. fixed bodies provided parallel to each other on both side and lower side parts of the movable body, and supporting the movable body by rolling between the side and lower side parts of the movable body and the guide surface facing thereto. The rolling element, a holding member that holds the rolling element and moves as the rolling element rolls, and are coupled to all of the fixed body, movable body, and holding member via a rotating pair and a sliding pair, or It is connected to one of the two through a rotating pair, and to the other two through a rotating pair and a sliding pair, and the rotation centers of each of these connections are located on a straight line, and from the center rotation center to the rotation centers at both ends. A guide device for a movable body, comprising: links having equal distances.