JP5416376B2 - Tipping machine - Google Patents

Description

  The present invention relates to a turning machine.

  The switch is to convert the Tongleil between the normal position and the reverse position, and includes a drive motor, an operating rod and a lock rod, a transmission mechanism for transmitting the driving force to the operating rod, and a lock rod. A lock piece for unlocking is provided (see Patent Document 1). In a rolling machine, if the normal operation is obstructed, for example, when a foreign object is caught between the Tongleil and the basic rail, the drive motor locks and burns out, or each part is affected by an impact generated by a sudden stop. There was a risk of damage. As for the impact, there is a similar fear because the structure that absorbs the inertia by the contact with the stopper at the end of the normal operation is adopted. For this reason, as shown in FIG. 4, in the existing turning machine 101, an eddy current torque limiter 115 is provided between the drive motor 103 and the speed reduction mechanism 113.

The eddy current torque limiter 115 transmits power to the shaft 115c by an eddy current action between a magnet 115a provided on the output shaft 103a of the drive motor 103 and a copper cylindrical portion 115b surrounding the magnet 115a. Therefore, when the operation is disturbed, the motor is prevented from burning by causing a slip. In addition, a magnet 115d fixed to the casing of the torque limiter 115 is provided, and a weak brake is always applied by an eddy current action generated between the cylindrical portion 115b made of copper, and the inertia of the mechanism after the normal operation ends. Energy was gradually consumed to reduce the impact force generated when contacting the stopper, thereby protecting the mechanism.
JP 2000-318610 A

  The eddy current type torque limiter 115 provided in the above-described existing turning machine does not have a large torque that can be transmitted. Therefore, as shown in FIG. It was provided in a portion where the transmission torque was not required to be relatively large before

  However, if the eddy current type torque limiter 115 is provided in the upstream portion of the speed reduction mechanism 113, the inertial force of the cylindrical portion 115b or the output shaft 115c of the torque limiter 115 and the inertial force of the speed reduction mechanism 113 itself when normal operation is completed or operation is interrupted. Acts on the mechanism (reduction gear, operation lever, lock piece, lock rod, etc.). Since the inertia of the structure including the speed reduction mechanism is effective by the square of the speed reduction ratio, the inertia by the output shaft of the torque limiter provided upstream of the speed reduction mechanism generates a large impact force. For this reason, the inertia of the torque limiter may cause damage.

  In addition, as described above, a weak brake is always applied by an eddy current action generated between the magnet 115d fixed to the casing of the torque limiter 115 and the copper cylindrical portion 115b, and is generated at the end of normal operation. The mechanical force was reduced and the mechanism was protected. However, in this case, since the brake is always applied, there is a problem that the operation efficiency is deteriorated as compared with the normal normal operation.

  The present invention has been made in view of the above-described circumstances, and can suppress damage at the end of normal operation or when disturbing operation, and can prevent damage due to inertia without providing a dedicated constant brake. The purpose is to provide a turning machine that can.

  In order to solve the above-described problems, a turning machine according to the present invention includes an operating rod, a driving source that drives the operating rod, and a speed reduction mechanism that decelerates and transmits the driving force of the driving source to the operating rod. And a non-contact power transmission type torque limiter utilizing magnetism incorporated in the speed reduction mechanism, the speed reduction mechanism having a plurality of speed reduction portions, and the torque limiter is the speed reduction of the plurality of speeds. It is arranged between the parts.

  Preferably, the torque limiter is a hysteresis type torque limiter, and includes a permanent magnet portion and a hysteresis magnetized portion disposed to face the permanent magnet portion, and the permanent magnet portion is a rare earth magnet. In this case, the permanent magnet portion may be a samarium cobalt magnet.

  ADVANTAGE OF THE INVENTION According to this invention, damage can be suppressed at the time of completion | finish of normal operation | movement, and operation disturbance, and the damage by inertia can be prevented, without providing a dedicated constant brake.

  The other features of the present invention and the operational effects thereof will be described in more detail with reference to the accompanying drawings.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments in the case where the present invention is applied to a turning machine will be described below with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

  FIG. 1 is a longitudinal cross-sectional view of a tipping machine according to the present embodiment. The turning machine 1 has a drive motor 3. The drive motor 3 is a drive source and is attached to the case 5 of the turning machine 1. In the case 5, an operating rod 7, a lock rod 9, a lock piece 11, a speed reduction mechanism 13, a torque limiter 15 and the like are provided.

  The operation rod 7 is a generally rod-shaped member that moves a tongleil (not shown) between a normal position and an inverted position, and extends in the front and back direction of FIG. Similarly to the operation rod 7, the lock rod 9 is also a substantially rod-like member extending in the front and back direction of FIG. 1 and is connected to the vicinity of the tip of the tongrel and detects the position near the tip of the tongrel. The lock piece 11 engages / disengages from the notch provided in the lock pad 9 according to a predetermined condition, and locks / unlocks the lock pad 9. The operation rod 7, the lock rod 9, and the lock piece 11 can be configured in the same manner as the configuration provided in the existing turning machine.

  The speed reduction mechanism 13 decelerates the driving force of the drive motor 3 and transmits it to the operating rod 7. The speed reduction mechanism 13 has a plurality of speed reduction sections in a plurality of stages, in this example. The first-stage reduction part is composed of a first gear 21 and a second gear 22, the second-stage reduction part is comprised of a third gear 23 and a fourth gear 24, and the third-stage reduction part is The fifth gear 25 and the sixth gear 26 are configured. The first gear 21 and the second gear 22 are a small bevel gear and a large bevel gear, respectively. The fourth gear 24 and the fifth gear 25 are supported by the same shaft member so as to rotate integrally. On the other hand, a hysteresis type torque limiter 15 is provided between the second gear 22 and the third gear 23, that is, the second gear 22 and the third gear 23 are supported by separate shaft members. .

  Next, the configuration of the torque limiter will be described with reference to FIGS. The torque limiter is a non-contact power transmission type torque limiter using magnetism, and more specifically, is a hysteresis type torque limiter. 2 and 3 are views showing the hysteresis type torque limiter in a longitudinal section and a plan view, respectively. The hysteresis type torque limiter 15 includes a housing 31 and a permanent magnet portion 33 and a hysteresis magnetization portion 35 housed therein.

  The housing 31 is configured in a substantially cylindrical shape, and a second gear 22 that is a large bevel gear is provided on the outer peripheral portion thereof. An output shaft 37 passes through the upper portion of the housing 31, and a third gear 23 is provided at the upper portion of the output shaft 37. A rotor 39 is provided below the output shaft 37, that is, an inner portion of the housing 31, and the permanent magnet portion 33 is provided on the outer peripheral surface of the rotor 39. On the other hand, a hysteresis magnetized portion 35 is provided on the inner peripheral surface of the housing 31 so as to face the permanent magnet portion 33 with a predetermined interval. In the present embodiment, the permanent magnet portion 33 is composed of a rare earth magnet, and as a suitable example, is composed of a samarium cobalt magnet.

  The tipping machine configured as described above has the following effects. First of all, in a turning machine, there is a possibility that the drive motor may be locked and burnt out at the end of normal operation or when operation is interrupted, or each part may be damaged by an impact generated by a sudden stop. In this regard, in the switch 1 according to the present embodiment, a hysteresis torque limiter 15 is incorporated in the speed reduction mechanism 13. Therefore, during normal operation, the hysteresis torque limiter 15 does not impede the function of the speed reduction mechanism 13, and the output of the drive motor 3 is transmitted to the speed reduction mechanism 13, and the operation rod 7 is driven to perform the conversion operation. On the other hand, at the end of normal operation / operation disturbance, an excessive torque transmission state is not generated, and the operation part including the drive motor 3, the speed reduction mechanism 13, the operation rod 7 and the lock rod 9, etc. I was trying to protect.

  Further, since the hysteresis type torque limiter 15 is disposed between the first stage reduction part and the second stage reduction part of the speed reduction mechanism 13, the hysteresis type torque limiter 15 including a part of the speed reduction mechanism 13 is upstream of the hysteresis type torque limiter 15. With respect to the inertial force caused by the part, transmission to the lock pad or the like can be suppressed. In particular, since the inertia of the structure including the speed reduction mechanism is effective by the square of the speed reduction ratio, the effect of incorporating the hysteresis type torque limiter 15 in the middle of the speed reduction mechanism 13 is very large. Further, by incorporating the hysteresis type torque limiter 15 in the middle of the speed reduction mechanism 13 in this manner, it is possible to prevent damage to each part due to excessive inertia force, so that the existing configuration described above (see FIG. 4) is used. In addition, it is not necessary to separately provide a constant brake means for consuming inertial force, and there is no problem that the operation efficiency deteriorates.

  On the other hand, since the transmission torque increases toward the downstream side of the speed reduction mechanism, if a torque limiter is incorporated in the speed reduction mechanism, it may be difficult to transmit desired torque during normal operation. In this regard, in the switch 1 according to the present embodiment, the permanent magnet portion 33 is provided with the hysteresis type torque limiter 15 in which a rare earth magnet (samarium cobalt magnet) is used. The torque limiter in the speed reduction mechanism does not hinder the function of the speed reduction mechanism. According to the test by the present inventor, as shown in the following table, it was found that a particularly high transmission torque can be obtained only when a rare earth magnet (samarium cobalt magnet) is used in a hysteresis type torque limiter.

  As can be seen from the above table, even when the hysteresis type torque limiter of Comparative Example 2 is used, when an anisotropic ferrite magnet is used for the permanent magnet portion, only a maximum transmission torque comparable to that of the eddy current type torque limiter is obtained. I can't. That is, it is difficult to incorporate the torque limiter into the speed reduction mechanism, and it must be arranged upstream of the speed reduction mechanism. On the other hand, the hysteresis type torque limiter using the rare earth magnet (samarium cobalt magnet) in the permanent magnet portion as in the present embodiment can obtain a maximum transmission torque more than double that of the comparative example. For the first time, even if the hysteresis type torque limiter 15 is incorporated in the speed reduction mechanism 13, the hysteresis type torque limiter 15 does not hinder the function of the speed reduction mechanism 13.

  As described above, according to the turning machine according to the present embodiment, it is possible to suppress damage at the end of normal operation and at the time of disturbance of operation, and prevent damage due to inertia without providing a dedicated constant brake. be able to.

  Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

It is a figure showing longitudinally a switch machine concerning an embodiment of the invention. It is a figure which shows a hysteresis type torque limiter longitudinally. It is a figure which shows a hysteresis type torque limiter planarly. It is a figure which shows the turning machine as a comparative example longitudinally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switching machine 3 Drive motor 7 Operating rod 13 Deceleration mechanism 15 Hysteresis type torque limiter 33 Permanent magnet part 35 Hysteresis magnetizing part

Claims (4)

Operation 桿,
A drive source for driving the operating rod;
A deceleration mechanism that decelerates the driving force of the driving source and transmits the driving force to the operating rod;
A non-contact power transmission torque limiter utilizing magnetism incorporated in the speed reduction mechanism,
The deceleration mechanism has a plurality of stages of deceleration units,
The torque limiter has a housing, a permanent magnet portion, and a hysteresis magnetization portion, and is disposed between the plurality of speed reduction portions ,
The housing is provided with a reduction gear on the outer peripheral portion thereof, and a rotor is provided therein.
The permanent magnet portion is provided on the outer peripheral surface of the rotor,
The hysteresis magnetization portion is provided on the inner peripheral surface of the housing so as to face the permanent magnet portion with a predetermined interval.
Tumbler. A tipping machine according to claim 1,
The torque limiter is disposed between the plurality of speed reduction units and closer to the drive source than the final speed reduction unit constituting the speed reduction mechanism.
Tumbler. The torque limiter is a hysteresis type torque limiter, and includes a permanent magnet portion and a hysteresis magnetization portion arranged to face the permanent magnet portion.
The permanent magnet portion is a rare earth magnet.
A turning machine according to claim 1 or 2. Operation 桿,
A drive source for driving the operating rod;
A deceleration mechanism that decelerates the driving force of the driving source and transmits the driving force to the operating rod;
A non-contact power transmission torque limiter utilizing magnetism incorporated in the speed reduction mechanism,
The deceleration mechanism has a plurality of stages of deceleration units,
The torque limiter is a turning machine disposed between the plurality of stages of speed reduction units , and further includes an output shaft and a rotor,
The torque limiter is a hysteresis type torque limiter, and includes a housing, a permanent magnet portion, and a hysteresis magnetization portion.
The housing is provided with a reduction gear that constitutes a first-stage reduction portion on the outer periphery thereof,
The output shaft has a reduction gear that constitutes a second-stage reduction portion, and a rotor, passes through the upper portion of the housing, and a lower portion than the penetration portion is disposed in an inner portion of the housing,
The reduction gear that constitutes the second-stage reduction part is provided at the upper part of the output shaft,
The rotor is provided at a lower portion of the output shaft;
The permanent magnet portion is provided on the outer peripheral surface of the rotor,
The hysteresis magnetization portion is provided on the inner peripheral surface of the housing so as to face the permanent magnet portion with a predetermined interval.
Tumbler.

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