JP2008215372A - Sliding mechanism and apparatus incorporated with sliding mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To newly detect a constitution and a method capable of regulating stable sliding torque by a method except for constituting sliding force by using a friction coefficient of a construction material itself, and constituting a sliding mechanism by using electromagnetic force by using a magnet. <P>SOLUTION: A driving member and a driven member of using the rotational center in common, are oppositely engaged, and viscous grease is applied to or filled in an oppositely engaged clearance. Thus, a directly contacting part of mutual materials is reduced, and is hardly abraded. An adjustment of the sliding force can be easily made by using viscosity of the applying or filling grease. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, mechanical parts may be damaged by the generated torque to be transmitted. However, it is known that a slip device or a torque limiter is used to prevent such damage. This is a technical field related to improvement of the sliding device and the torque limiter device.

  Conventionally, the sliding force of the sliding mechanism is produced by bringing friction materials into contact with each other and adjusting the frictional force by adjusting the difference in frictional force for each friction material and the applied pressure.

In addition, when friction materials are brought into contact with each other and wear due to the contact is avoided, a non-contact type sliding mechanism is realized using a magnet and electromagnetic force.
JP-A-5-296260 JP-A-6-150451

  In the conventional friction technology, the material of the contact portion is worn out because the friction coefficient of the material itself is used. Due to this wear, in the pressurization method, the load changed and the sliding force was not stable, or only very rough sliding force management was possible. In order to prevent this from being worn, a material that is difficult to polish was selected, and a slip force was generated due to its characteristics.

  A configuration that uses a friction coefficient of the material itself, or a configuration or method that can specify a stable sliding torque by a method other than using a magnet to configure a sliding mechanism using electromagnetic force. Finding new issues is a challenge.

  The drive member and the driven member having the same rotation center are brought into face-to-face engagement, and viscous grease is applied or filled in the face-to-face engaged gap. Thereby, there are few parts which materials contact directly and it becomes difficult to wear it out. Also, the slip force can be easily adjusted by utilizing the viscosity of the grease to be applied or filled.

  Since the mechanical parts themselves interpose grease, they become non-contact and are not easily worn. It is possible to stabilize the sliding force with little change with time.

  In the sliding mechanism of the present invention, the slippage decreases when the rotational speed changes rapidly, and the sliding speed increases when the rotational speed changes gradually. Therefore, when the rotation speed is gradually reduced and the rotation speed is gradually increased, it can be used as a kind of operation buffer.

  Since the sliding mechanism of the present invention is not a non-contact type sliding mechanism that uses a magnet and uses electromagnetic force, there is an advantage that it can be used even in places where magnetic leakage is disliked.

  The slip mechanism of the present invention uses the viscosity of grease, so it is unavoidable to be affected by the operating environment temperature, but a wide range of slip characteristics can be realized by selecting the viscosity of the grease. In addition, when the driving member and the driven member having the same rotation center are face-to-face engaged, the effective movement of the grease to be applied and filled is limited by changing the surface shape of the driving member and the driven member facing each other. Can achieve a wide range of sliding characteristics.

This will be described with reference to the drawings. FIG. 1 shows a sliding mechanism embodying the present invention. The driving member and a driven member having a common rotation center are face-to-face engaged, and grease is applied and filled between the facing driving member and the driven member. When the driving member and the driven member are face-to-face engaged, the sliding characteristics are stabilized by applying pressure.

  FIG. 2 shows an uneven groove shape provided on the mating surfaces of the drive member and the disk of the driven member. The shape shown here is only an example, and is not limited to this shape. The 1) uneven shape, 2) gap, 3) depth, 4) number of the combined surfaces vary depending on the application.

  FIG. 3 shows an embodiment in which the sliding mechanism of the present invention is applied to a speed reducer. A worm gear is installed on the main shaft of the motor, a driven worm wheel gear is used, and a worm reduction gear is used as the first stage of the reduction gear to prevent the motor from reversing due to external force. The motor to be used is not necessarily a motor that only rotates at a constant rotational speed. By using a motor that can freely change the rotational speed of the motor, the slip characteristics can be changed. As an example, it can be used as a kind of buffering operation by slowing the rotation speed of the motor and gradually increasing the rotation speed.

  The sliding mechanism of the present invention is installed in the two-stage reduction part of FIG. A driving member and a driven member having a common center of rotation are face-to-face engaged in the tooth surface of the large gear, and grease is applied and filled between the facing driving member and the driven member. The driving member and the driven member are face-to-face engaged. By applying pressure by a spring, the slip characteristics are stabilized.

  FIG. 4 shows an embodiment of a rotary drive device using the sliding mechanism of the present invention. This rotary drive device is a lifter that raises a kind of thing. As the motor turns, it raises things. When the power is cut off at the place where it rises, it slowly descends while gradually using the potential energy of its own weight while following the gravity with its own weight. The descending speed can also be controlled by the viscosity of the grease. This is an operation that has become possible as a result of utilizing the viscosity of grease in the sliding mechanism.

    FIG. 5 shows an example applied to a gripping device as an applied embodiment. When the object is gripped by the gripping device by driving the motor, soft gripping is possible with the sliding mechanism without damaging the gripped object by strongly gripping the object with the motor driving force. In addition, a rotation sensor is attached to the output shaft of the motor and the output shaft of the rotating device, and the number of rotations of the motor and the output shaft of the rotating device is monitored to balance the load torque while accelerating / decelerating the motor speed. And maintain a soft grip. In addition, the sliding mechanism shown in FIG. 1 of the present invention is built in the driven gear.

  When moving a liquid or the like slowly on a production line or the like without spilling from the container without giving an impact to the liquid, the motor can be used while accelerating or decelerating the number of rotations.

It is an example which implemented this invention between the large gear and the small gear. It is an example which implemented this invention by enlarging opposing area between a large gear and a small gear. It is an example which implemented this invention to the motor and the reduction gear. It is an example which implemented this invention to the rotating equipment containing a motor and a reduction gear. It is drawing which shows the Example which applied this invention to the holding | grip apparatus.

Explanation of symbols

1: Small gear 2: Large gear 3: Spring 4: Stopper (retaining ring)
5, 31: Motor 6: Worm gear 7: Worm wheel 8, 10: Small gear 9, 11: Large gear 12: Reduction gear main shaft 13: Reduction gear case 14: Grease 15: Rack 16: Heavy goods 31a: Drive gear 32 , 33: driven gear

Claims (3)

  A sliding member characterized in that a driving member and a driven member having a common center of rotation are brought into face-to-face engagement, and viscous grease is applied or filled in the face-to-face engaged gap, and the sliding force is utilized by the viscosity of the grease. mechanism.   The drive member and the driven member having the same rotation center are face-to-face engaged in the speed reducer, and the viscous grease is applied or filled in the face-engaged gap, and the slip force is utilized by the viscosity of the grease. A speed reducer characterized by a built-in sliding mechanism.   Adjust the sliding force by engaging the drive member and the driven member with the same rotation center in the torque transmission mechanism of the rotary drive device, and applying or filling the viscous grease in the face-engaged gap. A rotary drive device that incorporates a sliding mechanism characterized by utilizing the viscosity of grease and is intended to prevent component destruction and damage in the torque transmission mechanism of the rotary drive device.

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