JP5358791B2 - Hall element embedded structure of cylindrical linear motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To install a hall element in a gap formed in each flange of each cylindrical bobbin with the flange, to shorten whole length of a linear motor and to improve the positioning precision thereof. <P>SOLUTION: In a hall element embedded structure of the cylindrical linear motor, the hall element (20) is installed in the gap (11) formed in the respective flanges (6 and 7) becoming an integrated shape in a pair of cylindrical bobbins (8) with the flanges. A part (20a) of the hall element (20) is positioned in a hole (12). <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a hall element embedding structure of a cylindrical linear motor, and in particular, a hall element is provided in a gap formed in each flange portion of each cylindrical bobbin with a flange, thereby shortening the overall length of the linear motor and positioning it. The present invention relates to a new improvement for improving accuracy.

  Conventionally, this kind of cylindrical linear motor that has been used is not particularly disclosed as a patent document because no patent application has been filed, but in general, a linear position detection sensor is a cylindrical linear motor. Installed on the rear.

Since the conventional cylindrical linear motor is configured as described above, the following problems exist.
That is, since the linear position detection sensor is provided at the end of the cylindrical linear motor in the axial direction, it is difficult to meet the demand for shortening the overall length.

The cylindrical linear motor hall element embedding structure according to the present invention includes a plurality of flanged cylindrical bobbins arranged in series in an inner hole of a cylindrical case, and a winding wound around each of the flanged cylindrical bobbins. Each of the pair of cylindrical bobbins with a flange and a linear motion body provided with a magnet on the outer periphery thereof through a pair of bearings in a bobbin inner hole of the cylindrical bobbin with a flange A hall element is provided in a gap formed inside a pair of L-shaped parts having an L-shaped cross section in the axial direction of the flange, and a part of the hall element communicates with the gap and communicates with the outside. passing Rutotomoni wherein a configuration is located on the outer circumference hole portion formed in the portion of the L-shaped section, also, the Hall element, elongated in said cylindrical bobbin with the flanges are serially arranged The bobbin arrangement body is located at one end, and the The pair of flanged cylindrical bobbins that are in the form of a body are formed by integral molding, and the gap and the hole are formed integrally with each flange, and the pair of flanged cylindrical molds Each of the bobbins is configured independently, and each of the flanges is integrally formed by an adhesive, heat welding, or an uneven connection portion, and the gap and the hole are formed after the molding. The structure is formed by post-processing.

Since the Hall element embedding structure of the cylindrical linear motor according to the present invention is configured as described above, the following effects can be obtained.
That is, a plurality of flanged cylindrical bobbins arranged in series in an inner hole of a cylindrical case, a winding wound around each of the flanged cylindrical bobbins, and a bobbin inner hole of the flanged cylindrical bobbin And a linear motion body having a magnet on the outer periphery, and a pair of cylindrical bobbins with a pair of hooks that form an integral L-shaped axial cross section of each flange L-shaped section Hall elements are provided inside the <br/> formed void portion of a portion of the Hall element, through communication with the communicating and outside the gap portion Rutotomoni each L-shaped section By being located in the hole formed in the outer periphery of the coil, the Hall element can be installed in the coil bobbin, and the overall length of the linear motor can be greatly shortened.
The Hall element is located at one end of a longitudinal bobbin arrangement body in which the flanged cylindrical bobbins are arranged in series, so that the position of the linear motion body can be detected with high accuracy. . In addition, the pair of cylindrical bobbins with a flange that are integrated with each other are formed by integral molding, and the gap and the hole are molded integrally with each of the flanges, thereby making it easy to form the gap. It is.
The pair of cylindrical bobbins with flanges are configured independently of each other, and each of the flanges is formed integrally with an adhesive, heat welding, or an uneven connection part, thereby easily forming a gap. Can be obtained.
Moreover, since the said cavity and hole are formed by post-processing after the said shaping | molding, a shaping die can be simplified and cost reduction becomes easy.

  The present invention provides a hall element for a cylindrical linear motor in which a hall element is provided in a gap formed in each flange of each cylindrical bobbin with a flange to shorten the overall length of the linear motor and improve its positioning accuracy. An object is to provide an embedded structure.

A preferred embodiment of a hall element embedding structure of a cylindrical linear motor according to the present invention will be described below with reference to the drawings.
In FIG. 1, the reference numeral 1 indicates that the overall shape is a longitudinal cylindrical shape, and is, for example, a cylindrical case having an outer diameter of 10 mm or less. ing.
In the inner hole 1a of the cylindrical case 1, a rod-like linearly moving body 5 having a configuration in which a magnet 4 is attached to the outer periphery via the bearings 2 and 3 is provided so as to be linearly movable along the axial direction. ing.

The inner surface of the inner hole 1a of the cylindrical case 1 is a longitudinal bobbin in which a plurality of flanged cylindrical bobbins 8 having a continuous overall shape and integrally having flanges 6 and 7 at both ends are arranged in series. An arrangement body 8B is provided.
Each of the flanged cylindrical bobbins 8 is wound with a winding 9 for driving in three phases (U, V, W) and disposed along the longitudinal direction of the cylindrical case 1.

  As shown in FIGS. 2 and 3, the flanged cylindrical bobbin 8 is combined as a pair, and the configuration of FIG. 2 has two flanged cylindrical bobbins 8 formed independently of each other. Each one of the flange portions 6 and 7 is brought into contact with each other, and is integrally formed by any one of an adhesive, heat welding, an uneven connection portion (a well-known female-male fitting type), and the like.

  Also, each flanged cylindrical bobbin 8 shown in FIG. 3 has a configuration in which a pair of flanged cylindrical bobbins 8 are formed by injection molding using a mold (not shown), and each flange portion 6, 7. Are formed integrally with a gap portion 11 and one hole portion 12 communicating from the gap portion 11 to the outside.

  As shown in FIG. 3 described above, in the integrated collar portion 10 integrally formed by injection molding, the gap portion 11 and the hole portion 12 are formed according to the cavity shape (not shown) of the mold during the above-described injection molding. It is formed at the same time as injection molding.

Further, as shown in FIG. 3, after a pair of flanged cylindrical bobbins 8 are integrally formed and the integrated flange portion 10 is formed, a machining jig (from the inner surface 13 a of the bobbin inner hole 13 of the integrated flange portion 10 is formed. The gap 11 and the hole 12 can be post-processed using a not-shown). Accordingly, the gap portion 11 is formed inside a pair of L-shaped portions 6a and 7a having an L-shaped axial section of each flange portion 6 and 7, and the hole portion 12 is formed in each L-shaped portion 6a. , 7a is formed on the outer peripheral portion 10a.

The aforementioned winding 9 is wound around each groove 8A of each flanged cylindrical bobbin 8, and a hall element 20 is provided in the gap 11 as shown in FIG. A part 20a of the hall element 20 is led out from the hole 20 to the outside.
When the part 20a is constituted by a lead wire, it is connected to a hall element sensor wire 30 led out to the outside of the cylindrical case 1. Further, as shown in FIGS. 1 and 5, a coil fixing adapter 22 and a hall element connection substrate 22A are provided outside the bobbin arrangement body 8B.

  A cylindrical coil fixing adapter 22 shown in FIGS. 1 and 5 is provided on the outer periphery of each flanged cylindrical bobbin 8 provided with the winding 9, so that each winding in the cylindrical case 1 is provided. 9 insulation protection is performed.

  Further, the pair of flanged cylindrical bobbins 8 shown in FIG. 4 is formed with the flanged cylindrical bobbins 8 being independent from each other as described above with reference to FIG. 6 and 7 are preliminarily formed with semi-voids 6A and 7A, and the portion corresponding to the hole 12 is formed in an offset state, so that when the flanges 6 and 7 are brought into contact with each other, The gap 11 and the hole 12 are formed, and the same structure as the configuration of the pair of flanged cylindrical bobbins 8 and 8 by integral molding shown in FIG. 3 can be obtained.

  Next, in the above-described configuration, the three-phase drive signal is supplied to each winding 9 via the lead wire 21 so that each magnet 4 provided on the outer periphery of the linear motion body 5 and each winding 9 are well known. The linear motion body 5 can move linearly with respect to the cylindrical case 1 based on the magnetic action.

  In the above-described configuration, as shown in FIG. 1, the Hall element 20 is a pair of flanged cylindrical bobbins located on the leftmost side (or right end side) of the flanged cylindrical bobbins 8 arranged in series. Therefore, the linearly movable body 5 can be surely positioned in a state in which the overall length is shortened as compared with the prior art.

It is sectional drawing which shows the Hall element embedding structure of the cylindrical linear motor by this invention. FIG. 2 is an enlarged perspective view showing a state in which the flange portions of the pair of cylindrical bobbins with a flange of FIG. It is sectional drawing which shows the other form of FIG. FIG. 3 is a cross-sectional view of FIG. 2. It is an expanded sectional view of the principal part of FIG.

DESCRIPTION OF SYMBOLS 1 Cylindrical case 1a Inner hole 2, 3 Bearing 4 Magnet 5 Direct acting body 6, 7 A collar
6a, 7a L-shaped portion 8 Cylindrical bobbin with flange 8A Groove portion 9 Winding 10 Integral flange portion
10a outer peripheral portion 11 gap portion 12 hole portion 13 bobbin inner hole 20 hall element 20a part 21 lead wire 22 coil fixing adapter

Claims (5)

A plurality of flanged cylindrical bobbins (8) arranged in series in the inner hole (1a) of the cylindrical case (1), and windings wound around each of the flanged cylindrical bobbins (8) (9 And a linear motion body (5) provided in the bobbin inner hole (13) of the flanged cylindrical bobbin (8) via a pair of bearings (2, 3) and having a magnet (4) on the outer periphery. Prepared,
A pair of said flanged cylindrical bobbins (8) are formed inside a pair of L-shaped portions (6a, 7a) that form an L-shaped axial section of each flange portion (6, 7) that is integral with each other. void portion (11) Hall element (20) is provided in a portion of the Hall element (20) (20a) is communicated with the gap portion (11) and passing with the outside Rutotomoni each L A hall element embedding structure for a cylindrical linear motor, wherein the hall element embedding structure is located in a hole (12) formed in an outer peripheral portion (10a) of the character-shaped portion (6a, 7a) .   The Hall element (20) is located at one end of a longitudinal bobbin arrangement body (8B) in which the flanged cylindrical bobbins (8) are arranged in series. Item 2. A hall element embedded structure of a cylindrical linear motor according to Item 1.   The pair of flanged cylindrical bobbins (8) that are integrally formed are formed by integral molding, and the gap (11) and the hole (12) are molded integrally with the flanges (6, 7). 3. The hall element embedding structure for a cylindrical linear motor according to claim 1, wherein the hall element is embedded.   The pair of flanged cylindrical bobbins (8) are configured independently of each other, and each of the flanges (6, 7) is integrally formed by an adhesive, heat welding, or an uneven connection part. 3. The hall element embedding structure of the cylindrical linear motor according to claim 1 or 2.   4. The hall element embedding structure for a cylindrical linear motor according to claim 3, wherein the gap (11) and the hole (12) are formed by post-processing after the molding.

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