Encoder mounting structure and method using a socket

Abstract

The present invention simply attaches an encoder main body to a disk unit provided on a shaft without contacting a light-receiving element and an LED. The encoder mounting structure and method using a socket portion are as follows: a shaft end (51), serving as a socket insertion portion (50), is the shaft end of a motor shaft (6) of a motor (5); a disk unit (11) is provided to be fitted with an outer periphery (51a) of the shaft end (51) by a first socket fitting portion (41) and has a disk (2); a threaded hole (11A) is formed along an axial direction (P) of the motor shaft (6) at the axis of the shaft end (51); a fixing screw (30) is provided on the disk unit (11) and screwed into the threaded hole (11A); and an encoder main body (12) is provided on the disk unit (11) and has a light-receiving element (14) and an LED (13) in a state of being separated by the disk (2), and the encoder main body (12) is inserted into the disk (2) from a right lateral direction (P1) which is a direction orthogonal to the axial direction (P).

Description

Technical Field

[0001] The present invention relates to an encoder mounting structure and method using a socket portion, and more particularly to a new improvement for inserting an encoder body into a disk from a lateral direction, which is an orthogonal direction perpendicular to the axial direction, by using a socket structure. Background Art

[0002] Conventionally, as such an encoder mounting structure and method using a socket (in-low) portion, for example, the structure and method of Patent Document 1 can be cited as the first conventional structure. This structure discloses the following structure: a concave socket fitting portion is provided in the encoder mounting portion of the object to be measured, and a socket insertion portion that can be inserted into the socket fitting portion and fitted to the object to be measured is provided on the object to be measured mounting side of the encoder body. The socket insertion portion has a diameter-expanded portion that can be firmly fixed to the socket fitting portion by expanding at least a part thereof.

[0003] In addition, as Figures 7 to 10 the second conventional structure shown, although the document name for representing this second conventional structure is not disclosed, a structure made within the company is shown here.

[0004] In Figure 7 it, a disk support body in which a disk 2 is fixed to its upper part is shown by reference numeral 1. First and second threaded holes 3 and 4 that are orthogonally arranged in the hole direction and formed in a through shape are formed in the disk support body 1.

[0005] An axial hole 7 that penetrates from the upper surface 1a to the lower surface 1b and is used to embed Figure 10 the motor shaft 6 of the motor 5 shown is formed at the axis of the disk support body 1.

[0006] In addition, the motor shaft 6 embedded in the axial hole 7 is fastened by the tips of first and second screws 10 and 10A screwed into the respective threaded holes 3 and 4, and the motor shaft 6 is fixed to the disk support body 1 by the respective screws 10 and 10A.

[0007] Therefore, the disk unit 11 is composed of the disk support body 1, the disk 2, the first and second screws 10 and 10A, and the axial hole 7.

[0008] Figure 8 On the end face 5A of the motor 5, the encoder body 12 into which the aforementioned disk unit 11 is embedded is shown, and an LED 13 is provided in the encoder body 12.

[0009] A component substrate 16 is provided in the encoder body 12. The component substrate 16 has a light receiving element 14 on the back surface and electronic components 15 on the front surface, and a connector 17 is connected to the front surface of the component substrate 16.

[0010] In addition, as Figure 9 shown, a pair of notches 20 are formed in a manner of being opposed to each other at 180 degrees between the component substrate 16 and the encoder main body 12.

[0011] Prior art documents

[0012] Patent documents

[0013] Patent Document 1: Japanese Patent Laid-Open No. 2002-195853 Summary of the Invention

[0014] Problems to be Solved by the Invention

[0015] The conventional encoder mounting structure using a socket portion has the following problems due to the above-described configuration.

[0016] That is, in the case of the first conventional structure described above, it is necessary to form a socket insertion portion corresponding to the socket fitting portion having a corresponding depth on the end face of the motor. Therefore, it is difficult to compactly mount the disk main body on the motor.

[0017] In addition, in the case of the second conventional structure shown above, after the disk unit 11 is inserted into the outer periphery of the motor shaft 6 of the motor 5, the encoder main body 12 is inserted while being tilted in order to avoid the disk unit 11 and prevent the light receiving element 14 from hitting the disk 2. Then, the encoder main body 12 is fixed to the motor shaft 6 by screwing a pair of screws 10, 10A of the disk support 1. Figures 7 to 10 Therefore, when the encoder main body 12 is mounted on the end face 5A of the motor 5, since the encoder main body 12 is inserted while maintaining a minute gap G between the light receiving element 14 and the disk 2, the light receiving element 14 may come into contact with the disk 2 and either one may be damaged. At this time, components may also be replaced, and it is difficult to improve the production yield. In addition, since the minute gap G between the light receiving element 14 and the disk 2 is adjusted after the encoder main body 12 is inserted into the disk unit 11, the adjustment is difficult and sometimes the accuracy cannot be provided. After adjustment, the encoder main body 12 is fixed to the motor shaft 6 by a pair of screws 10, 10A of the disk support 1.

[0018] The present invention has been completed in order to solve the above-described problems, and in particular, provides a mounting structure and method that can insert the encoder main body into the disk from the lateral direction, which is the orthogonal direction orthogonal to the axial direction, using a socket structure without imposing difficult gap G adjustment.

[0019] Means for Solving the Problems

[0020]

[0021] ​The encoder mounting structure using a socket portion of the present invention has the following structure, that is, it includes: a shaft end, as a socket insertion portion, which is the shaft end of the motor shaft of the motor; a disk unit, arranged to be fitted with the outer periphery of the shaft end by a first socket fitting portion, and having a disk; a threaded hole, formed along the axial direction of the motor shaft at the axis of the shaft end; a fixing screw, arranged on the disk unit and screwed with the threaded hole; and an encoder body, arranged on the disk unit, having a light receiving element and an LED in a state separated by the disk, and the encoder body is inserted into the disk from the right lateral direction which is a direction orthogonal to the axial direction. In addition, the encoder mounting structure using a socket portion of the present invention has the following structure: a socket insertion plate is mounted on the end face of the motor or the outer periphery, a straight portion, and a protruding portion forming a second socket fitting portion having the same shape as the socket insertion plate are formed on the end face of the motor, the inner periphery of the second socket fitting portion of the encoder body is engaged with the outer periphery of the socket insertion plate or the outer periphery of the second socket fitting portion, and by rotating the encoder body by a specified angle, the encoder body is fixed at a specified angular position on the end face. In addition, the encoder mounting method using a socket portion of the present invention is the following method, that is, it uses: a shaft end, as a socket insertion portion, which is the shaft end of the motor shaft of the motor; a disk unit, arranged to be fitted with the outer periphery of the shaft end by a first socket fitting portion, and having a disk; a threaded hole, formed along the axial direction of the motor shaft at the axis of the shaft end; a fixing screw, arranged on the disk unit and screwed with the threaded hole; and an encoder body, arranged on the disk unit, having a light receiving element and an LED in a state separated by the disk, and the encoder body is inserted into the disk from the right lateral direction which is a direction orthogonal to the axial direction. In addition, the encoder mounting method using a socket portion of the present invention is the following method: a socket insertion plate is mounted on the end face of the motor or the outer periphery, a straight portion, and a protruding portion forming a second socket fitting portion having the same shape as the socket insertion plate are formed on the end face of the motor, the inner periphery of the second socket fitting portion of the encoder body is engaged with the outer periphery of the socket insertion plate or the outer periphery of the second socket fitting portion, and by rotating the encoder body by a specified angle, the encoder body is fixed at a specified angular position on the end face.

[0022] Advantages of the Invention

[0023] The encoder mounting structure and method using the socket portion of the present invention are configured as described above, and thus, the following effects are achieved. That is, the following structure and method, which include: a shaft end, as a socket insertion portion, is the shaft end of the motor shaft of the motor; a disk unit, which is arranged to be fitted with the outer periphery of the shaft end by a first socket fitting portion and has a disk; a threaded hole, which is formed along the axial direction of the motor shaft at the axis of the shaft end; a fixing screw, which is arranged on the disk unit and screwed into the threaded hole; and an encoder main body, which is arranged on the disk unit and has a light receiving element and an LED in a state of being separated by the disk. The encoder main body is inserted into the disk from the positive lateral direction, which is a direction orthogonal to the axial direction. Therefore, in the installation of the disk unit to the motor shaft, a socket structure is used, and after the fixing screw is screwed into the threaded hole formed along the axial direction of the motor shaft to complete the screw fastening of the disk unit, the encoder main body is inserted from the positive lateral direction. Therefore, the installation can be carried out without adjusting the gap between the light receiving element and the disk, and the installation accuracy is improved. In addition, the installation accuracy of the disk unit relative to the motor shaft is improved, and the encoder main body can be inserted into the disk from the positive lateral direction.

[0024] In addition, the encoder mounting structure and method using the socket portion of the present invention are composed of the following structure: a socket insertion plate is installed on the end face of the motor or a second socket fitting portion is formed, and the encoder main body is engaged with the outer periphery of the socket insertion plate or the outer periphery of the second socket fitting portion. By rotating the encoder main body by a specified angle, the encoder main body is fixed at a specified angular position on the end face. Thus, the encoder main body can be simply fixed to the motor using a socket structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of a disk unit in the encoder mounting structure and method using the socket portion according to an embodiment of the present invention.

[0026] Figure 2 It shows that it is provided with Figure 1 The D - 0 - D cross-sectional view of the encoder main body of the disk unit Figure 4 is shown.

[0027] Figure 3 It is in Figure 2 A cross-sectional view of the structure in which a light receiving element and an LED are provided.

[0028] Figure 4 It is Figure 3 top view of.

[0029] Figure 5 It is a top view of a socket insertion plate provided at the end of the motor or a second socket fitting portion formed at the end of the motor.

[0030] Figure 6 It is Figure 5Left view.

[0031] Figure 7 is a cross-sectional view showing a disk unit of a conventional structure.

[0032] Figure 8 is Figure 7 a cross-sectional view when the disk unit is attached to the encoder main body.

[0033] Figure 9 is Figure 8 top view.

[0034] Figure 10 is Figure 9 D - 0 - D cross-sectional view. Detailed implementation mode

[0035] The encoder mounting structure and method using a socket portion according to the present invention is a structure and method capable of inserting the encoder main body into the disk from the positive lateral direction, which is an orthogonal direction orthogonal to the axial direction, by using a socket structure.

[0036] Embodiment

[0037] Hereinafter, a preferred embodiment of the encoder mounting structure and method using a socket portion according to the present invention will be described with reference to the accompanying drawings.

[0038] It should be noted that the same or equivalent parts as those in the conventional example are denoted by the same reference numerals for description.

[0039] In Figure 1 , a disk support body formed by fixing a disk 2 to its upper part is shown by reference numeral 1. A first socket fitting portion 41 is formed in a concave portion 40 of the disk support body 1, and a socket insertion portion 50 formed by a shaft end 51 of a motor shaft 6 to be described later is configured to be fitted with the first socket fitting portion 41.

[0040] Therefore, the disk unit 11 is composed of the disk support body 1, the disk 2, the concave portion 40, the first socket fitting portion 41, and the socket insertion portion 50.

[0041] Figure 2 On the end face 5A of the motor 5, an encoder main body 12 into which the disk unit 11 is inserted is shown. A component substrate 16 having electronic components 15 is provided on the encoder main body 12.

[0042] Figure 3 The following parts are shown: A fixing screw 30 is screwed into a threaded hole 11A formed at the center of the disk unit 11 along the axial direction P of the motor shaft 6 in Figure 2 , and the disk unit 11 is fixed to the motor shaft 6 by the fixing screw 30.

[0043] In the LED setting portion 31 of the encoder main body 12, an LED 13 is provided facing the side of the disk 2, and on the back surface 16a of the component substrate 16, a light receiving element 14 is provided facing the side of the disk 2.

[0044] Therefore, the LED 13 and the light receiving element 14 are configured to face each other with the disk 2 therebetween, and the light of the LED 13 is received by the light receiving element 14 via a slit (not shown) of the disk 2, and a pulsed signal can be taken out to the outside as an encoder signal via a connector 17 connected to the component substrate 16.

[0045] According to the Figures 1 to 5 encoder mounting structure for a motor according to the embodiment of the present invention described above, using the above-mentioned socket fitting portion 41 and socket insertion portion 50, first, the disk unit 11 is fitted and fixed to the shaft end 51 of the motor shaft 6. Here, by screwing the fixing screw 30 axially of the motor 5, the fixing of the disk unit 11 to the motor shaft 6 is completed.

[0046] The encoder main body 12 can be mounted using a socket insertion plate 70 mounted on the end face 5A of the motor 5 or based on the socket fitting portion reference of the outer periphery 51B, linear portion 51D, and protruding portion 51E of the second socket fitting portion 51A formed in the same shape as the socket insertion plate 70 on the end face 5A of the motor 5.

[0047] Therefore, when the encoder main body 12 is mounted on the end face 5A of the motor 5, since the disk unit 11 is already fixed at a predetermined position on the motor shaft 6, the encoder main body 12 can be inserted into the disk 2 from the positive lateral direction P1, which is a direction orthogonal to the axial direction P, that is, a direction orthogonal to Figure 3 the plane of the paper of

[0048] Therefore, it is not necessary to tilt the orientation of the encoder main body 12 as in the past to try different insertion directions, and the installation can be safely completed from the positive lateral direction P1 without contacting the light receiving element 14 and the LED 13 and without causing damage.

[0049] Next, Figure 4 A top view shows the Figure 2 and Figure 3In the state where the encoder body 12 is in a certain state, a socket insertion plate 70 is installed on the end face 5A of the motor 5, or an outer periphery 51B, a straight portion 51D, and a protruding portion 51E of the socket fitting portion 51A having the same shape as the socket insertion plate 70 are formed on the end face 5A of the motor 5. The inner periphery 51C of the second socket fitting portion 51A of the encoder body 12 is engaged with the outer periphery 51B of the socket insertion plate 70 or the outer periphery 51B of the second socket fitting portion. By rotating the encoder body 12 by a predetermined angle (for example, 90 degrees), it is clamped to the stepped portion 12A of the encoder body 12 and fixed at a predetermined angular position on the end face 5A.

[0050] It should be noted that Figure 4 FIG. shows a top view of the encoder body 12 rotated 90 degrees and stopped at a predetermined angular position and screw-fixed (screws not shown) to the motor 5 via the notch 20.

[0051] Figure 5 is a top view of the socket insertion plate 70 or the outer periphery 51B, the straight portion 51D, and the protruding portion 51E of the second socket fitting portion 51A formed on the end face 5A of the motor 5.

[0052] Figure 6 is Figure 5 a left view of the socket insertion plate 70 or the outer periphery 51B, the straight portion 51D, and the protruding portion 51E of the second socket fitting portion 51A formed on the end face 5A of the motor 5, having a protruding portion 51E protruding from the axis. It should be noted that Figure 5 , 6 For the socket structure on the motor side, there are the following cases: a structure in which the outer periphery 51B, the straight portion 51D, and the protruding portion 51E are formed on the end face 5A of the motor 5 as described above, and a case where only the socket insertion plate 70 without a protruding portion protruding from the axis is installed on the motor shaft 6 in the motor 5 with a shaft. It should be noted that for the outer periphery 51B, the straight portion 51D, and the protruding portion 51E, as Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, although the socket insertion plate 70 and the second socket fitting portion 51A have different solid and dashed lines, they have the same shape. Therefore, the aforementioned outer periphery 51B, straight line 51D, and protruding portion 51E are described as common parts.

[0053] In addition, as described above, in order to make the encoder body 12 as Figure 3 and Figure 4engage with the outer periphery 51B of the socket insertion plate 70 or the outer periphery 51B of the second socket engaging portion 51A in such a manner that when one of the gaps G1, G2 formed on the left and right sides of the encoder body 12 slides outside the pair of straight portions 51D of the socket insertion plate 70, the gap G1 abuts against the upper outer periphery 51B of the respective outer peripheries 51B.

[0054] When, in this state, the encoder body 12 is further rotated in the direction of arrow N, as Figure 4 shown, the inner periphery 51C of the second socket engaging portion 51A engages with the respective arcuate outer peripheries 51B, and as Figure 2 and Figure 4 such, the installation of the encoder body 12 on the end face 5A of the motor 5 is completed. That is, as described above, the encoder body 12 is inserted into the disk 2 from the positive lateral direction P1, which is the direction orthogonal to the axial direction P.

[0055] In addition, the same effect can be obtained even when the aforementioned second socket engaging portion 51A is used instead of the socket insertion plate 70.

[0056] Industrial Applicability

[0057] The encoder mounting structure and method using a socket portion of the present invention can insert an encoder body having an LED and a light receiving element into a disk from the positive lateral direction, which is the direction orthogonal to the axial direction, by using a socket structure. Therefore, the installation and adjustment of the encoder after the disk is fixed are extremely easy.

Claims

1. An encoder mounting structure using a socket portion, characterized in that, Adopt the following structure: Comprising: a shaft end (51), serving as a socket insertion portion (50), which is the shaft end of the motor shaft (6) of the motor (5); a disk unit (11), arranged to be fitted with the outer periphery (51a) of the shaft end (51) by a first socket fitting portion (41), having a disk (2) and a disk support body (1), and the disk support body (1) clamps and fixes the disk (2) from above and below; a threaded hole (11A), formed along the axial direction (P) of the motor shaft (6) at the axis of the shaft end (51); a fixing screw (30), arranged on the disk unit (11) and screwed with the threaded hole (11A); and an encoder main body (12), arranged on the disk unit (11), having a light receiving element (14) and an LED (13) in a state of being separated by the disk (2). The encoder main body (12) is inserted into the disk (2) from the positive lateral direction (P1) which is a direction orthogonal to the axial direction (P).

2. The encoder mounting structure using a socket according to claim 1, characterized in that, Composed of the following structure: Install a socket insertion plate (70) on the end face (5A) of the motor (5) or form an outer periphery (51B), a straight portion (51D) and a protruding portion (51E) of a second socket fitting portion (51A) having the same shape as the socket insertion plate (70) on the end face (5A) of the motor (5), and engage the inner periphery (51C) of the second socket fitting portion (51A) of the encoder main body (12) with the outer periphery (51B) of the socket insertion plate (70) or the outer periphery (51B) of the second socket fitting portion (51A). By rotating the encoder main body (12) by a specified angle, the encoder main body (12) is fixed at a specified angular position on the end face (5A).

3. An encoder installation method using a socket portion, characterized in that Using: a shaft end (51), serving as a socket insertion portion (50), which is the shaft end of the motor shaft (6) of the motor (5); a disk unit (11), arranged to be fitted with the outer periphery (51a) of the shaft end (51) by a first socket fitting portion (41), having a disk (2) and a disk support body (1), and the disk support body (1) clamps and fixes the disk (2) from above and below; a threaded hole (11A), formed along the axial direction (P) of the motor shaft (6) at the axis of the shaft end (51); a fixing screw (30), arranged on the disk unit (11) and screwed with the threaded hole (11A); and an encoder main body (12), arranged on the disk unit (11), having a light receiving element (14) and an LED (13) in a state of being separated by the disk (2). Insert the encoder main body (12) into the disk (2) from the positive lateral direction (P1) which is a direction orthogonal to the axial direction (P).

4. The encoder installation method using a socket portion according to claim 3, characterized in that Install a socket insertion plate (70) on the end face (5A) of the motor (5) or form an outer periphery (51B), a straight portion (51D), and a protruding portion (51E) of a second socket fitting portion (51A) having the same shape as the socket insertion plate (70) on the end face (5A) of the motor (5), and engage the inner periphery (51C) of the second socket fitting portion (51A) of the encoder main body (12) with the outer periphery (51B) of the socket insertion plate (70) or the outer periphery (51B) of the second socket fitting portion (51A). By rotating the encoder main body (12) by a predetermined angle, the encoder main body (12) is fixed at a predetermined angular position on the end face (5A).

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