JP2016035148A - Railway switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the transmission torque while inhibiting pulsation of the transmission torque in a magnet clutch of a railway switch.SOLUTION: A magnet clutch 300 has a hybrid structure comprising 1) a first magnet clutch part 350A configured by opposing to each other a first permanent magnet part 351A and a second permanent magnet part 352A as clutch members, and 2) a second magnet clutch part 350B configured by opposing to each other a third permanent magnet part 353B and a hysteresis material 354B as clutch members.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a turning machine for converting a branching device of a railway line into a fixed position / inverted position.

  The turning machine is provided with a clutch for preventing motor burnout and impact on the internal mechanism. This clutch is mainly magnetically coupled and is connected between the motor and the reduction gear. In recent years, the ability of magnets has improved, and it has become possible to reduce the size of a large-torque magnet clutch (magnetic coupling clutch). Therefore, a technique for arranging a clutch in a reduction mechanism has been proposed (for example, Patent Documents). 1). In addition, a technique that enables torque adjustment suitable for the magnitude of the load has been proposed (see, for example, Patent Document 2).

JP 2010-36804 A JP 2012-241437 A

  However, it has been difficult to further increase the transmission torque in the conventional magnetic clutch type switch. For example, the turning machine disclosed in Patent Document 2 constitutes a magnet clutch by combining a permanent magnet and a hysteresis material. With this configuration, torque can be transmitted with a constant torque regardless of the degree of slip, but there is a limit to increasing the magnetic flux density in order to further increase the transmitted torque. Of course, the transmission torque can be increased by simply increasing the size of the magnet clutch. However, in order to secure a space for accommodation, it is inevitable to increase the size of the tipping machine. It was difficult to fit in size.

  On the other hand, there is also an idea of configuring a magnet clutch by combining a permanent magnet and a permanent magnet. However, when the position of the magnets facing each other when slipping occurs, transmission torque pulsation occurs. That is, the transmission torque decreases in the process of the positional deviation, and when the positional deviation is eliminated (completed), the transmission torque is repeatedly returned to the original magnitude, and the transmission torque pulsates. Further, when the transmission torque pulsates, each mechanical component may vibrate and generate noise. If the number of poles of the permanent magnet is increased, pulsation can be reduced, but there are problems that the manufacture is difficult and the cost is increased.

  The present invention has been devised in view of the above-described problems, and an object of the present invention is to increase transmission torque while suppressing pulsation of transmission torque in a magnetic clutch of a tipping machine.

A first invention for solving the above-mentioned problem is a turning machine that decelerates the driving force of a motor by a speed reduction mechanism unit and uses it as a conversion power of an operating rod,
A rotor portion having a first permanent magnet portion, a clutch member of one of the third permanent magnet portion and the hysteresis material, and connected to an output gear that transmits rotational force to the operating rod side;
A passive gear portion having the other clutch member of the third permanent magnet portion and the hysteresis member at a position facing the one clutch member, and receiving a driving force from the motor side;
A second permanent magnet portion that rotates integrally with the passive gear portion and that is provided at a position facing the first permanent magnet portion;
A first magnet clutch portion is formed by magnetic coupling between the first permanent magnet portion and the second permanent magnet portion, and a second magnet clutch is formed by magnetic coupling between the one clutch member and the other clutch member. It is a turning machine that consists of parts.

  According to the first invention, the first magnet clutch part using the first permanent magnet part and the second permanent magnet part as a clutch member, and the second magnet clutch using the third permanent magnet part and the hysteresis material as a clutch member. By adopting a hybrid structure with the part, the transmission torque can be increased as compared with the case where the permanent magnet part and the hysteresis material are combined alone.

Further, according to the present invention, the pulsation of the transmission torque can be suppressed even if the number of poles of the first magnet clutch portion is limited to an extent that does not cause a cost increase. That is, the magnetic coupling becomes weaker as the rotational displacement increases as the slip occurs in the first magnet clutch portion, while the magnetic coupling becomes stronger as the rotational displacement increases in the second magnet clutch portion. Pulsation can be suppressed.
That is, the transmission torque can be increased while suppressing the pulsation of the transmission torque.

  2nd invention has the said 2nd permanent magnet part, and it mounts | wears with the said passive gear part so that a mounting position can be adjusted in the direction which translates the said 2nd permanent magnet part with respect to the said 1st permanent magnet part. The adjusting mechanism section, and by adjusting the mounting position of the adjusting mechanism section, the opposed area between the first permanent magnet section and the second permanent magnet section can be increased or decreased. It is a tipping machine.

  According to the second invention, it is possible to adjust the transmission torque of the entire turning machine.

  According to a third aspect of the invention, the passive gear portion has the other clutch member at a position where the relative position with respect to the one clutch member is maintained regardless of the adjustment of the mounting position of the adjustment mechanism portion. Is a tipping machine.

  According to the third invention, even if the transmission torque as a whole is adjusted, the transmission torque of the second magnet clutch portion can be fixed. That is, the transmission torque can be adjusted while maintaining the effect of suppressing the pulsation of the transmission torque. Of course, the mechanism for adjusting the transmission torque can be made simpler than the case of adjusting both the first magnet clutch portion and the second magnet clutch portion, which is advantageous from the viewpoint of manufacturing cost and assembly.

  As for the arrangement of the magnetic poles related to the first magnet clutch portion, as a fourth invention, the first permanent magnet portion has an N pole and an S pole alternately along the circumferential direction on the outer peripheral surface of the rotor portion. The second permanent magnet portion is configured to have the same number of permanent magnets as the first permanent magnet portion, and N poles and S poles alternately in the first permanent magnet portion. It is also possible to constitute the turning machine according to any one of the first to third inventions, which are arranged along the circumferential direction so as to face each other.

Alternatively, as a fifth aspect of the invention, the first permanent magnet portion is configured by arranging a plurality of permanent magnets on the outer peripheral surface of the rotor portion so that only one of the N pole and the S pole appears along the circumferential direction. The second permanent magnet portion is arranged along the circumferential direction so that the same number of permanent magnets as the first permanent magnet portion are opposed to the first permanent magnet portion only in the other of the N pole and the S pole. Has been configured,
The turning machine of any one of the first to third inventions can be configured.

It is a top view which shows the structural example of the internal mechanism of the switching machine in 1st Embodiment, Comprising: The figure corresponded to a mode that the cover of the case was removed. The expanded sectional view which shows the structural example of the magnet clutch in 1st Embodiment. The top view which shows the structural example of the rotor housing of a magnet clutch. Sectional drawing which shows the structural example of the rotor housing of a magnet clutch. The bottom view which shows the structural example of the rotor housing of a magnet clutch. The top view which shows the structural example of the adjustment mechanism part of a magnet clutch. Sectional drawing which shows the structural example of the adjustment mechanism part of a magnet clutch. The bottom view which shows the structural example of the adjustment mechanism part of a magnet clutch. The top view which shows the structural example of the rotor of a magnet clutch. The side view which shows the structural example of the rotor of a magnet clutch. The perspective appearance figure showing the example of composition of a clutch adjustment tool. The figure for demonstrating the clutch adjustment method of the switch machine in 1st Embodiment. The figure which shows the modification of the magnetization pattern of a 1st magnet clutch part. Sectional drawing which shows the modification of a structure of a 2nd magnet clutch part. Sectional drawing which shows the modification which enables adjustment of the transmission torque of a 2nd magnet clutch part.

[First Embodiment]
FIG. 1 is a top view illustrating a configuration example of an internal mechanism of the switch 100 in the present embodiment, and corresponds to a state in which the upper lid of the case 101 is removed and the inside of the case, that is, the maintenance space 103 can be seen. In addition, in order to make an understanding of an internal mechanism easy, illustration of a circuit controller, a control relay, an external terminal board, etc. is abbreviate | omitted.

  The switch machine 100 of the present embodiment includes a motor 250 on the outer side surface (left side surface as viewed in FIG. 1) of the case 101. The drive shaft 202 of the motor 250 passes through the side portion of the case 101 and is connected to the speed reduction mechanism portion 120 provided inside. The rotational power generated by the motor 250 is converted into an appropriate torque by the speed reduction mechanism 120 and transmitted to the conversion lock mechanism 140.

  The reduction mechanism 120 is engaged with, for example, a pinion gear 122 attached to the drive shaft 202 of the motor 250, a bevel gear 124 that is a passive gear meshing with the pinion gear 122, and a first reduction gear 126 provided on the rotation shaft of the bevel gear 124. The intermediate gear 128 includes a conversion gear 132 that is a final gear that meshes with a second reduction gear 130 provided on the rotation shaft of the intermediate gear 128.

The conversion lock mechanism 140 converts the rotational power decelerated by the speed reduction mechanism 120 into the linear motion of the operating rod 102, and locks / releases the locking rod 104, and is a known mechanism. It can be realized in the same way as a turning machine.
For example, with respect to conversion, by the engagement between the conversion roller 142 projecting from the lower surface of the conversion gear 132 and the conversion cam groove 144 formed in the operation rod 102 in a direction crossing the operation direction of the operation rod 102. Realized. As for the lock, a first lock plate 153 and a second lock plate 154 in which a substantially semi-circular lock cam groove that engages with the conversion roller 142 is provided are provided. The lock pieces 155 and 156 are extended toward the lock rod 104 and penetrate therethrough.

[Description of magnet clutch]
FIG. 2 is an enlarged cross-sectional view showing a configuration example of the magnet clutch in the present embodiment, and is an AA cross-sectional view according to the magnet clutch 300 of FIG. Note that the intermediate gear 128 is not shown for easy understanding of the structure.

The magnet clutch 300 of this embodiment constitutes a part of the speed reduction mechanism unit 120.
Specifically, the magnet clutch 300 is
(1) a rotor housing 304 that is integral with a bevel gear 124 that receives rotational power from the motor 250 side and forms a bottomed cylindrical inner space along the rotation axis A1;
(2) an adjusting mechanism 340 that is screwed coaxially with the rotation axis A1 into the upward opening of the bottomed cylindrical inner space of the rotor housing 304;
(3) A rotor portion 370 that is rotatable in the internal space of the rotor housing 304 and also serves as a rotation shaft of the clutch itself and the bevel gear 124.

First, the configuration of the rotor housing 304 will be described.
FIG. 3 is a top view of the rotor housing 304. FIG. 4 is a cross-sectional view (cross-section AA in FIG. 1). FIG. 5 is a bottom view of the same. As shown in these drawings, the rotor housing 304 includes a bevel gear 124 in a bowl shape on the outer periphery of the upper end opening of the bottomed cylindrical portion 305. The shaft of the bottomed cylindrical portion 305 is formed so as to coincide with the rotation axis of the bevel gear 124, and the bevel gear 124 is set to have a larger diameter than the bottomed cylindrical portion 305. That is, the helical teeth of the bevel gear 124 are outside the bottomed cylindrical portion 305.

  The bottomed cylindrical portion 305 has a large inner diameter portion 306 on the opening side, and a small inner diameter portion 308 having a smaller diameter on the bottom side than the large inner diameter portion 306. That is, the bottomed cylindrical portion 305 has an inner diameter that is gradually reduced from the opening side toward the bottom, and forms a stepped bottomed cylindrical space that opens upward.

  An adjustment screw 310 is formed on the inner wall surface of the large inner diameter portion 306 from the opening end side. The adjustment screw 310 is compatible with an adjustment screw 344 (see FIG. 7) provided on the outer periphery of the adjustment mechanism 340.

  One end of an adjustment spring 360 (see FIG. 2) for biasing the adjustment mechanism portion 340 screwed to the adjustment screw 310 in the opening direction on the surface of the stepped portion of the bottomed cylindrical portion 305 facing the opening. An adjustment spring receiving groove 312 is provided for fitting.

  The small inner diameter portion 308 becomes a rotor accommodating portion 314 that accommodates the rotor portion 370. An annular hysteresis material 354B is fixed to the bottom inner peripheral surface of the small inner diameter portion 308.

  Further, the rotor housing 304 includes a lock mechanism portion 320 that fixes / releases the relative position of the rotor housing 304 and the adjustment mechanism portion 340 at a diameter difference portion between the outside of the small inner diameter portion 308 and the large inner diameter portion 306.

  The lock mechanism portion 320 includes a stop pin 322, a compression spring 324 that biases the stop pin toward the opening of the bottomed cylindrical portion 305, and these (the stop pin 322 and the compression spring 324). And a stop pin lid 328 for sealing.

The retaining pin 322 includes a jaw portion 322b that is expanded in the middle of a rod having a cylindrical cross section.
The retaining pin accommodating part 326 is a small space having a columnar shape with a ceiling with a downward opening formed in parallel with the rotation axis of the bevel gear 124 from the bottom surface side of the rotor housing 304. The central axis of the retaining pin accommodating portion 326 is set to the outside by a distance L from the rotation axis of the bevel gear 124 (also the central axis of the rotor housing 304).

  A pin tip insertion hole 326 a having a diameter smaller than the inner diameter of the ceiling surface passes through the stepped portion of the bottomed cylindrical portion 305 in the ceiling portion of the retaining pin housing portion 326. The center axis of the pin tip insertion hole 326a is also on the outer side by a distance L from the rotation axis of the bevel gear 124, that is, the center axis of the rotor housing 304. The inner diameter of the pin tip insertion hole 326a is set so that the tip portion 322a of the set pin 322 can be loosely fitted, but is set smaller than the diameter of the jaw portion 322b of the set pin 322. In addition, a screw is cut at the lower end opening of the lock pin accommodating portion 326 so that the lock pin lid 328 can be screwed.

  The locking pin lid 328 is a lid that is screwed together to prevent the locking pin 322 and the compression spring 324 from coming off from the lower end opening of the locking pin housing portion 326. A pin lower end insertion hole 328a through which the lower end portion 322c of the stop pin 322 is inserted is provided at the center.

  The lock mechanism 320 is assembled by inserting the lock pin 322 into the lock pin housing 326 with the tip end portion 322a of the lock pin 322 facing upward, then inserting the compression spring 324, and finally screwing the lock pin lid 328. . In the assembled state, the distal end portion 322a of the retaining pin 322 is loosely fitted into the pin distal end insertion hole 326a and protrudes toward the opening of the rotor housing 304, that is, upward. The lower end portion 322c of the stop pin 322 is loosely fitted into the pin lower end insertion hole 328a of the stop pin lid 328, and performs the function of guiding while restricting the fall of the stop pin 322 in combination with the loose insertion of the pin tip insertion hole 326a.

  The compression spring 324 is housed in a compressed state between the jaw portion 322b of the stop pin 322 and the stop pin lid 328, and is attached to the adjustment mechanism portion 340 screwed into the adjustment screw 310 with the stop pin 322 facing upward. Rush. However, since the jaw portion 322b of the stop pin 322 contacts the ceiling of the stop pin housing portion 326, the tip end portion 322a of the stop pin 322 does not protrude beyond the specified length inside the bottomed cylindrical portion 305.

Next, the adjustment mechanism unit 340 will be described.
6 to 8 are a top view, a cross-sectional view (cross-section AA in FIG. 1), and a bottom view, respectively, of the adjusting mechanism 340.

As shown in FIG. 7, the adjustment mechanism 340 includes an adjustment screw 344 that fits the adjustment screw 310 of the rotor housing 304 on the outer peripheral side surface of the disc-shaped substrate 342, and the rotor portion 370 along the central axis of the substrate 342. A rotor shaft insertion hole 346 through which the upper portion of the shaft is inserted is penetrated.
Further, as shown in FIG. 6, a plurality of stop pin holes 348 through which the tip end portions 322 a of the stop pins 322 can be inserted are concentrically formed with respect to the central axis of the substrate 342. In this embodiment, the stop pin holes 348 are provided around the central axis of the substrate 342 in increments of 45 °, but the number of installations and installation angles are not limited to this and can be set as appropriate. The radius r coincides with a distance L (see FIG. 4) between the set pin accommodating portion 326 and its pin tip insertion hole 326a and the central axis of the rotor housing 304.

The second permanent magnet portion 352A is fixed to the lower surface of the substrate 342 concentrically with the central axis of the substrate 342.
As shown in FIGS. 7 and 8, the second permanent magnet portion 352 </ b> A is a short cylindrical clutch member in which N poles and S poles with inward magnetic fields are alternately arranged. For example, it is realized by an inner peripheral multipolar cylindrical (annular) permanent magnet. Alternatively, it is realized by arranging and standing curved fence-shaped permanent magnets in a ring shape. In the present embodiment, the number of magnetic poles is provided so that 360 ° is divided into 16 equal parts, but the number of magnetic poles can be set as appropriate. The height of the second permanent magnet portion 352A is such that, even when the adjusting mechanism portion 340 is screwed up to the end of the large inner diameter portion 306 (see FIG. 4) of the rotor housing 304, the lower end thereof is the hysteresis material 354B or the rotor accommodating portion. The dimension is set so as not to contact the bottom surface of 314.

  Further, an adjustment spring receiving groove 345 is provided in the lower surface of the substrate 342 and the outer peripheral portion of the second permanent magnet portion 352A. The adjustment spring receiving groove 345 is fitted with the upper end portion of the adjustment spring 360 for biasing the adjustment mechanism portion 340 screwed to the adjustment screw 310 in the opening direction.

Next, the rotor unit 370 will be described.
9 to 10 are diagrams showing a configuration example of the rotor unit 370 in the present embodiment, where the former corresponds to a top view and the latter corresponds to a side view.

  The rotor portion 370 of this embodiment includes a diameter-enlarged portion 374 having a diameter larger than that of the rotary shaft main body portion near the center of the rotary shaft main body portion 372.

  The rotating shaft main body 372 is a cylindrical body that is fitted to a bearing 92 (see FIG. 2) fixed to the case housing 90 of the case 101 and pivoted up and down. A key groove 372a and a stepped portion 372b are provided on the upper side of the rotary shaft main body 372 with the enlarged diameter portion 374 as a boundary. The first reduction gear 126 is abutted against the step 372b and is fixed using the key 96 (see FIG. 2).

On the other hand, the first permanent magnet part 351A is fixed to the outer peripheral upper part side of the enlarged diameter part 374, and the third permanent magnet part 353B is fixed to the outer peripheral lower part slightly below this.
The first permanent magnet portion 351A and the third permanent magnet portion 353B are short cylindrical clutch members in which N poles and S poles whose magnetic fields are outward are alternately arranged. For example, it is realized by an outer peripheral multipolar cylindrical (annular) permanent magnet. Alternatively, it is realized by arranging and standing curved fence-shaped permanent magnets in a ring shape. The number of magnetic poles of the first permanent magnet portion 351A and the third permanent magnet portion 353B is provided so that 360 ° is divided into 16 equal parts, but the number of magnetic poles can be set as appropriate.
As shown in FIG. 2, the outer diameter of the first permanent magnet portion 351A is set smaller than the inner diameter of the second permanent magnet portion 352A. Further, the outer diameter of the third permanent magnet portion 353B is set smaller than the inner diameter of the hysteresis material 354B.

[Description of assembly procedure]
Next, the procedure for assembling the magnet clutch 300 and assembling it on the tipping machine will be described. It is assumed that the lock mechanism 320 is assembled in advance in the rotor housing 304. Further, it is assumed that the first reduction gear 126 is not assembled to the rotor portion 370.

(Procedure 1) The rotary shaft main body 372 (see FIG. 10) on the side without the key groove 372a of the rotor 370 is inserted into the rotor bearing portion 316 (see FIG. 4) of the rotor housing 304.
(Procedure 2) The adjustment spring 360 (see FIG. 7) is fitted into the adjustment spring receiving groove 312 (see FIG. 4) of the rotor housing 304.
(Procedure 3) While passing the rotating shaft main body portion 372 having the key groove 372a of the rotor portion 370 through the rotor shaft insertion hole 346 (see FIG. 7) of the adjusting mechanism portion 340, the adjusting mechanism portion 340 is adjusted with the adjusting screw of the rotor housing 304. Screw into 310. At this time, when the adjustment mechanism 340 is rotated relative to the rotor housing 304, the stop pin 322 is inserted into the stop pin hole 348 every time the stop pin hole 348 reaches above the stop pin 322, and the adjustment mechanism 340 and the rotor housing The relative positional relationship with 304 is fixed. If it is desired to continue the screwing of the adjusting mechanism 340, the screwing can be continued by turning the adjusting mechanism 340 while pushing the locking pin 322 inserted into the locking pin hole 348. When the adjusting mechanism 340 is screwed to an appropriate position, the magnet clutch 300 is assembled.

(Procedure 4) The tip of the rotating shaft main body 372 of the rotor 370 protruding from the rotor bearing 316 (see FIG. 4) is fitted into the bearing 92 (see FIG. 2) of the lower case housing 90.
(Procedure 5) The key 96 is inserted into the key groove 372a, and the first reduction gear 126 is fixed to the rotor portion 370. Accordingly, the intermediate gear 128 and the like are also assembled as appropriate.
(Procedure 6) The beam portion 91 of the detachable upper case housing 90 is fitted to the bearing 92 previously fitted to the beam portion so that the upper end of the rotary shaft main body portion 372 of the rotor portion 370 is fitted. Install.

Then, as shown in FIG. 1 and FIG. 2, the magnet clutch 300 is in a state of being assembled to the turning machine 100.
In this state, the stop pin 322 enters one of the adjustment mechanism portions 340 and functions as a rotation stop, and the adjustment mechanism portion 340 and the rotor housing 304 are connected and integrated. The first permanent magnet portion 351A and the second permanent magnet portion 352A are disposed opposite to each other with a predetermined distance in the radial direction with respect to the rotation axis A1, and are opposed in the axial direction by an overlap OL (see FIG. 2). Be placed. That is, the first permanent magnet portion 351A and the second permanent magnet portion 352A and the first magnet clutch portion 350A in which the permanent magnets are opposed to each other as a clutch member are configured (see FIG. 2).

  On the other hand, the third permanent magnet portion 353B and the hysteresis material 354B are also arranged to face each other with a predetermined distance in the radial direction with respect to the rotation axis A1, and a second magnet clutch portion 350B that makes the permanent magnet and the hysteresis material face each other as a clutch member is provided. Configured (see FIG. 2).

  And if the drive shaft 202 rotates, the bevel gear 124 which meshes with the pinion gear 122 is made passive. The rotor housing 304 integral with the bevel gear 124 and the adjusting mechanism 340 that is prevented from rotating by the retaining pin 322 rotate integrally with the rotation shaft A1 of the clutch. Then, torque for rotating the rotor housing 304 and the adjustment mechanism 340 is transmitted to the rotor unit 370 by the first magnet clutch unit 350A and the second magnet clutch unit 350B. That is, the rotational force output from the motor 250 is transmitted to the other gears of the speed reduction mechanism 120 via the first speed reduction gear 126 and used for the conversion lock operation.

According to the present embodiment, the first permanent magnet portion 351A and the second permanent magnet portion 352A are used as clutch members, and the first permanent magnet portion 350A, the third permanent magnet portion 353B, and the hysteresis material 354B are used as clutch members. By adopting a hybrid structure with the second magnet clutch portion 350B, the transmission torque can be increased as compared with a conventional magnet clutch constituted only by a magnet clutch in which a permanent magnet and a hysteresis material are combined.
Further, the pulsation of the transmission torque by the first magnet clutch portion 350A can be suppressed. That is, when the first magnet clutch unit 350A slips and the rotational deviation increases, the magnetic coupling weakens. On the other hand, in the second magnet clutch part 350B, the larger the rotational deviation, the stronger the magnetic coupling. It is possible to suppress the pulsation by compensating for the decrease in magnetic coupling. That is, the transmission torque can be increased while suppressing the pulsation of the transmission torque.

[Description of magnet clutch adjustment method]
Next, a method for adjusting the magnet clutch 300 will be described.
FIG. 11 is a perspective external view showing a configuration example of the clutch adjustment tool 400.
The clutch adjustment tool 400 is a round bar-like tool, and includes a front end portion 402, an abutting portion 404, and a gripping portion 406 in order from one end. The distal end portion 402 has a diameter suitable for fitting with the stop pin hole 348 and a length at least equal to the depth of the stop pin hole 348. The abutting portion 404 has a diameter larger than that of the distal end portion 402. The gripping part 406 is a part gripped by the adjustment operator.

Now, specific adjustment work will be described.
The adjustment operator first removes the upper lid of the case 101 to secure the maintenance space 103 (see FIG. 1). The stop pin 322 is in a state of protruding from below into any of the stop pin holes 348 of the adjustment mechanism 340 exposed to the maintenance space 103. Therefore, as shown in FIG. 12, the front end 402 of the clutch adjustment tool 400 is directed toward the stop pin hole 348 in which the stop pin 322 is inserted, and the compression spring 324 resists the urging force that pushes up the stop pin 322. Insert from above. At this time, the upper surface of the adjustment mechanism 340 abuts against the abutting portion 404 of the clutch adjustment tool 400 to fix the tool. Then, since the stop pin 322 is pushed back and comes out of the stop pin hole 348, the adjustment operator holds the clutch adjustment tool 400 and rotates it clockwise or counterclockwise around the rotation axis A1 of the clutch.

  When the clutch adjustment tool 400 is turned, the pushed back stop pin 322 is separated from the tip end portion 402 of the clutch adjustment tool 400 and protrudes upward again by the urging force of the compression spring 324, but abuts against the lower surface of the adjustment mechanism portion 340. While the clutch adjustment tool 400 is turned and the adjustment mechanism portion 340 rotates along the adjustment screw 310, the stop pin 322 slides while abutting against the lower surface of the adjustment mechanism portion 340, so that it does not function as a rotation stop. However, when the next set pin hole 348 eventually reaches above the set pin 322, the set pin 322 enters the next set pin hole 348 and functions as a detent again. If the adjusting mechanism 340 is to be rotated further, the clutch adjusting tool 400 is pulled out, reinserted into the stop pin hole 348 into which the current stop pin 322 is inserted, and the rotation stop is released again to release the clutch adjustment tool 400. Turning the.

  As a result, the adjustment mechanism 340 is translated upward or downward with respect to the rotor housing 304 by the adjustment screw 310. Accordingly, the relative positions of the first permanent magnet portion 351A and the second permanent magnet portion 352A move in parallel, and the overlap OL increases or decreases. That is, the facing area between the first permanent magnet portion 351A and the second permanent magnet portion 352A changes, and the magnitude of the torque transmitted by the first magnet clutch portion 350A is changed.

  On the other hand, in the 2nd magnet clutch part 350B, the opposing area of the 3rd permanent magnet part 353B and the hysteresis material 354B does not change. That is, the effect of suppressing the pulsation of the transmission torque generated in the first magnet clutch portion 350A is not affected by the clutch adjustment.

[Modification]
As described above, the embodiment to which the present invention is applied has been described, but the present invention is not limited to this, and components can be added, omitted, or changed as appropriate.

  For example, when the first permanent magnet part 351A, the second permanent magnet part 352A, and the third permanent magnet part 353B are formed by connecting a plurality of permanent magnets, adjacent permanent magnets may be brought into direct contact with each other. It is good also as a structure which pinches | interposes and inserts a resin spacer etc. suitably between permanent magnets.

  For example, as shown in FIG. 13A, the arrangement of the magnetic poles of the first permanent magnet portion 351A is such that only one of the N pole and the S pole appears on the outer peripheral surface of the rotor portion 370 along the circumferential direction. And the arrangement of the magnetic poles of the second permanent magnet portion 352A is configured such that the same number of permanent magnets as the first permanent magnet portion 351A are opposed to the first permanent magnet portion 351A only in the other of the N and S poles. You can also. In this case, an effect of reducing the pulsation of the transmission torque in the first magnet clutch portion 350A can be expected.

  Each of the first permanent magnet portion 351A and the second permanent magnet portion 352A may be composed of one cylindrical permanent magnet (annular permanent magnet), or a curved fence shape as shown in FIG. 13 (2). Further, a plurality of permanent magnets 355 magnetized inward and outward of the curved arc may be connected in a ring shape. In the latter case, adjacent permanent magnets may be brought into direct contact with each other, but may be configured such that a resin spacer or the like is appropriately interposed between the permanent magnets.

  In addition, with respect to the second magnet clutch portion 350B, the attachment position may be exchanged between the third permanent magnet portion 353B and the hysteresis material 354B. That is, the third permanent magnet portion 353B may be provided in the rotor housing 304, and the hysteresis material 354B may be provided in the rotor portion 370.

  Further, as shown in FIG. 14 (1), the third permanent magnet portion 353B and the hysteresis member 354B may be formed into a thin donut-shaped disk instead of being cylindrical. In this case, as shown in FIG. 14 (2), the third permanent magnet portion 353B may be configured by connecting single-sided multipole permanent magnets or fan-shaped permanent magnets magnetized in the thickness direction. In the latter case, adjacent permanent magnets may be brought into direct contact with each other, or may be configured such that a resin spacer or the like is appropriately interposed between the permanent magnets.

  In the above embodiment, the transmission torque of the first magnet clutch portion 350A can be adjusted. However, as shown in FIG. 15, the transmission torque of the first magnet clutch portion 350A is fixed and the second magnet clutch portion is fixed. A configuration that enables adjustment of the transmission torque of the portion 350B is also possible.

DESCRIPTION OF SYMBOLS 100 ... Turning machine 122 ... Pinion gear 124 ... Bevel gear 155,156 ... Lock piece 202 ... Drive shaft 250 ... Motor 300 ... Magnet clutch 304 ... Rotor housing 305 ... Bottomed cylindrical part 306 ... Large inner diameter part 308 ... Small inner diameter part DESCRIPTION OF SYMBOLS 310 ... Adjustment screw 312 ... Adjustment spring receiving groove 314 ... Rotor accommodating part 316 ... Rotor bearing part 320 ... Locking mechanism part 322 ... Stop pin 322a ... Tip part 322b ... Jaw part 322c ... Lower end part 324 ... Compression spring 326 ... Stop pin accommodation 326a ... Pin tip insertion hole 328 ... Stop pin lid 328a ... Pin lower end insertion hole 340 ... Adjustment mechanism 342 ... Substrate 344 ... Adjustment screw 346 ... Rotor shaft insertion hole 348 ... Stop pin hole 350A ... First magnet clutch part 350B ... 2nd magnet clutch part 351A ... Permanent magnet section 352A ... second permanent magnet unit 353B ... third permanent magnet portion 354B ... hysteresis material 355 ... permanent magnet 360 ... adjustment spring 370 ... rotor section 400 ... clutch adjustment tool

Claims (5)

It is a turning machine that decelerates the driving force of the motor by the speed reduction mechanism and uses it as the conversion power of the operation rod,
A rotor portion having a first permanent magnet portion, a clutch member of one of the third permanent magnet portion and the hysteresis material, and connected to an output gear that transmits rotational force to the operating rod side;
A passive gear portion having the other clutch member of the third permanent magnet portion and the hysteresis member at a position facing the one clutch member, and receiving a driving force from the motor side;
A second permanent magnet portion that rotates integrally with the passive gear portion and that is provided at a position facing the first permanent magnet portion;
A first magnet clutch portion is formed by magnetic coupling between the first permanent magnet portion and the second permanent magnet portion, and a second magnet clutch is formed by magnetic coupling between the one clutch member and the other clutch member. A machine that consists of parts. An adjustment mechanism portion mounted on the passive gear portion so as to be capable of adjusting a mounting position in a direction of parallel movement of the second permanent magnet portion with respect to the first permanent magnet portion;
The turning machine according to claim 1, further comprising: an adjustment unit configured to adjust a mounting position of the adjustment mechanism unit so that an opposing area between the first permanent magnet unit and the second permanent magnet unit can be increased or decreased. . The passive gear portion has the other clutch member at a position where the relative position with respect to the one clutch member is maintained regardless of the mounting position adjustment of the adjustment mechanism portion.
The turning machine according to claim 2. The first permanent magnet portion is configured by arranging permanent magnets on the outer peripheral surface of the rotor portion so that N poles and S poles appear alternately along the circumferential direction,
The second permanent magnet part is arranged along the circumferential direction so that the same number of permanent magnets as the first permanent magnet part are alternately opposed to the first permanent magnet part. Configured,
The turning machine according to any one of claims 1 to 3. The first permanent magnet portion is configured by arranging a plurality of permanent magnets on the outer peripheral surface of the rotor portion so that only one of the N pole and the S pole appears along the circumferential direction.
The second permanent magnet part is arranged along the circumferential direction so that the same number of permanent magnets as the first permanent magnet part are opposed to the first permanent magnet part only in the other of the N pole and the S pole. Configured,
The turning machine according to any one of claims 1 to 3.

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