JP2007040313A - Torque limiter and garbage spin-drying device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a torque limiter which can facilitate its control and use it for both directions and has a positioning function, and a garbage spin-drying device using the torque limiter. <P>SOLUTION: In the torque limiter 1 having an inner ring member 2 and outer ring member 3, in which the inner ring member 2 and outer ring member 3 are interlocked with each other when input torque given to an input member formed by either of the inner ring member 2 and outer ring member 3 is below setting torque, a locking groove 4 is formed on either of the inner ring member 2 or outer ring member 3, and a coil spring 7 pushing a roller pin 6 locked in the locking groove 4 to the locking groove 4 is provided on either of the inner ring member 2 or outer ring member 3. When the input torque given to the roller pin 6 exceeds the setting torque, the roller pin 6 is dislocated from the locking groove 4 by elastically deforming the coil spring 7, and the inner ring member 2 and outer ring member 3 are set to be in a non-interlocking state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a torque limiter that outputs the same torque when the input torque is equal to or lower than the set torque and that does not output torque when the input torque exceeds the set torque, and a garbage dewatering device using the torque limiter. More specifically, the present invention relates to a torque limiter using a spring force and a garbage dewatering device using the torque limiter.

As a torque limiter, the input member and the output member are interlocked with each other through a frictional force, and when the torque exceeding the predetermined frictional force is applied to the input member, a slip is generated between the input member and the output member so as not to be interlocked. There is something to do. Further, as another example of the torque limiter, there is one in which high-viscosity oil is interposed between an input member and an output member to interlock them.

Furthermore, a one-way clutch may be used as another example of the torque limiter.
For example, a torsion coil spring or needle bearing is provided at the connection part of two axes, and when one axis rotates in one direction, the two axes do not interlock, but when rotating in the opposite direction, the torsion coil spring or needle bearing hits the other axis. A one-way clutch that interlocks with two axes is used as a torque limiter.

However, in the torque limiter using the frictional force between the components described above, the components are rubbed with each other, so the life is short, and maintenance is frequently performed, and the management is complicated. Further, in a torque limiter using oil, the viscosity of the oil is easily affected by temperature, so that the use conditions can be limited and the setting and management of the frictional force are complicated.

Furthermore, in a torque limiter using a one-way clutch, only rotation in one direction functions as a torque limiter, so that it cannot be used as a torque limiter in both directions as it is. In order to use this as a torque limiter in both directions, two one-way clutches must be used or a complicated mechanism must be provided, which increases the size and cost of the device.

Further, since positioning between the input member and the output member is not taken into consideration in any torque limiter, in order to position these, a positioning degree or the like must be provided separately from the torque limiter.

SUMMARY OF THE INVENTION An object of the present invention is to provide a torque limiter that is easy to manage and can be used in both rotational directions, and also has a positioning function, and a garbage dewatering device using the torque limiter.

  In order to solve the above-described problems, the present invention includes an inner ring and an outer ring provided with an inner ring and an outer ring, and an input torque applied to an input member configured by either the inner ring or the outer ring is equal to or less than a set torque. In a torque limiter that is transmitted to an output member constituted by the other of the inner ring or the outer ring, a locking groove is formed in either the input member or the output member, and the locking groove A coil spring that presses the locking member to be locked against the locking groove is provided on either the input member or the output member, and when the input torque applied to the input member exceeds the set torque, the locking member The coil spring is elastically deformed to disengage from the locking groove, the inner ring and the outer ring are brought into a non-interlocking state, and the input torque is not transmitted to the output member. And butterflies.

In the present invention, the transmission and non-transmission of torque are switched by the biasing force of the coil spring, so that it is less susceptible to wear than in the case where the frictional force between components is used as in the prior art. In addition, it is less susceptible to temperature than conventional oil viscosity.

Furthermore, it can be used as a bidirectional torque limiter with a small number of parts. Moreover, since it functions as a torque limiter when the locking member is engaged with the locking groove, it can have a function of positioning the inner ring and the outer ring.

  In the present invention, a plurality of the engaging grooves are provided, and the other of the input member and the output member is engaged with the engaging members at positions corresponding to the engaging grooves. The plurality of locking members respectively engaged with the engaging portions are released from the locking grooves by elastically deforming the coil spring when the input torque applied to the input member exceeds the set torque. And it is preferable to engage with an engaging part and to interlock | cooperate with either the said input member or the said output member. If comprised in this way, a some latching member can be engaged or disengaged with respect to a some latching groove simultaneously. Therefore, the degree of freedom of the set torque can be improved and the set torque can be stabilized.

  In the present invention, the inner ring and the outer ring are provided concentrically adjacent to the center of rotation, and the inner ring and the outer ring are relative to each other when the input torque applied to the input member exceeds the set torque. It is preferably configured to rotate. The plurality of locking grooves are disposed, for example, along the circumferential direction of either the input member or the output member, and the locking member is moved after the relative rotation and before the relative rotation. The engaging groove is engaged with the engaging groove different from the engaging groove. In this case, it is preferable that the plurality of locking members are arranged at equal intervals in the circumferential direction, and by configuring in this way, the diameter of the coil spring is increased in a balanced manner in the circumferential direction by the plurality of locking members. Therefore, the transmission torque is stabilized and the accuracy of the torque limiter can be ensured.

  In the present invention, the locking member is preferably a roller pin. In general, since the roller pin itself has rigidity, this configuration makes it possible to reliably link the inner ring and the outer ring when the input torque is equal to or less than the set torque. Further, when the input torque exceeds the set torque and escapes from the locking groove, the roller pin is formed in a columnar shape so that it can be smoothly escaped without being caught by the edge of the locking groove. Therefore, it is possible to reduce the variation in transmission torque among individuals.

  In the present invention, the coil spring is preferably composed of a plurality of coil springs. With this configuration, the total amount of movement of the divided coil springs is the same as the amount of movement of one continuous coil spring having the same axial dimension when the divided coil springs are arranged in parallel in the axial direction. The amount of movement of one coil spring can be reduced. Therefore, the life of the coil spring can be extended by using the split coil spring as compared with the continuous coil spring.

  In the present invention, the coil spring is wound around the outer wall of the outer ring, the locking groove is a groove formed in the outer wall of the inner ring, and the engaging portion is formed in the radial direction of the outer ring. Preferably, the locking member is disengaged from the engagement groove by moving radially outward in the through hole against the biasing force of the coil spring.

As described above, according to the torque limiter of the present invention, the transmission and non-transmission of torque are switched by the biasing force of the coil spring, so that compared with the conventional case where the frictional force between the parts is used, Less wear and durability can be improved. Further, since it is less susceptible to temperature than in the case of using oil viscosity as in the prior art, the usable conditions can be widened.

Furthermore, it can be used as a bidirectional torque limiter with a small number of parts. Moreover, since it functions as a torque limiter when the locking member is engaged with the locking groove, it can have a function of positioning the inner ring and the outer ring.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  1A, 1B, and 1C are cross-sectional views taken along line A-A in FIG. 1B in a positioning state of an outer ring member and an inner ring member of a torque limiter to which the present invention is applied, It is the longitudinal cross-sectional view cut | disconnected by the BB line of A), and the cross-sectional view in the idling state of an outer ring member and an inner ring member. FIG. 2 is an exploded perspective view when each member constituting the torque limiter to which the present invention is applied is viewed obliquely from above.

1 and 2 show an embodiment of a torque limiter 1 of the present invention. The torque limiter 1 includes an inner ring member 2 and an outer ring member 3, and the inner ring member when the input torque applied to the input member constituted by either the inner ring member 2 or the outer ring member 3 is equal to or less than a set torque. 2 and the outer ring member 3 are transmitted to the output member constituted by the other. In this torque limiter 1, six locking grooves 4 are formed in the inner ring member 2, and a coil spring 7 for pressing a roller pin 6 as a locking member to be locked in the locking groove 4 against the locking groove 4 is an outer ring. It is wound around the outer wall of the member 3.

  In this embodiment, two engaging portions 5 are formed on the outer ring member 3, and the two roller pins 6 are configured to be locked to the locking grooves 4 and the engaging portions 5. When the input torque applied to the input member exceeds the set torque, the roller pin 6 elastically deforms the coil spring 7 and moves outward in the radial direction to disengage from the locking groove 4, and the inner ring member 2 and the outer ring member 3 are not connected. It will be linked. In this embodiment, the locking groove 4 is formed in the inner ring member 2, but it may be formed in the outer ring member 3. In this case, the inner ring member 2 includes a coil spring 7 and an engaging portion.

  The inner ring member 2 includes a cylindrical part (inner ring) 8 and a flange part 9. The outer ring member 3 includes a fitting peripheral wall portion (outer ring) 10 that is rotatably fitted around the cylindrical portion 8 of the inner ring member 2. When the inner wall of the fitting peripheral wall portion 10 of the outer ring member 3 slides on the outer wall of the cylindrical portion 8 of the inner ring member 2, the inner ring member 2 and the outer ring member 3 are relatively rotated. As for the engaging part 5, a wall part is notched in two places of the fitting surrounding wall part 10, and the roller pin 6 can move to a radial direction. The engaging portions 5 are formed at intervals of 180 degrees in the circumferential direction. The locking grooves 4 are formed at six locations on the outer peripheral surface of the cylindrical portion 8 at intervals of approximately 60 degrees. Therefore, the inner ring member 2 and the outer ring member 3 are positioned so as to be fixed every 60 degrees.

The coil spring 7 has a ring shape in which a metal wire is wound eight times, and has a circular projection surface viewed from the axial direction. The coil spring 7 is wound around the outer wall of the fitting peripheral wall portion 10 of the outer ring member 3 so as to cover each engaging portion 5, and is configured to simultaneously cover the two engaging portions 5.

The roller pin 6 is provided inside each engaging portion 5 and is urged inward by a coil spring 7.

  Next, an example of the operation of the torque limiter 1 described above will be described.

As shown in FIG. 1, when the two roller pins 6, 6 are locked in the two locking grooves 4, 4 and the input torque is equal to or less than the set torque, the tubular portion 8 of the inner ring member 2 and the outer ring member 3 are fitted. The peripheral wall portion 10 is connected to the roller pins 6 and 6 so that the inner ring member 2 and the outer ring member 3 are positioned and can rotate in conjunction with each other. When a large torque is applied between the inner ring member 2 and the outer ring member 3, the edges of the two locking grooves 4 and 4 simultaneously press the two roller pins 6 and 6 outward, and the roller pins 6 and 6 are coil springs. 7 is pushed out from the locking grooves 4, 4 against 7. As a result, the inner ring member 2 and the outer ring member 3 cannot maintain the positioning state and idle.

Since the roller pins 6 and 6 are engaged with the engaging portion 5 even after being pushed out from the locking grooves 4 and 4, the roller pins 6 and 6 rotate in conjunction with the outer ring member 3 while maintaining an interval of 180 degrees. . Here, since the locking grooves 4 are formed at six positions on the outer peripheral surface of the cylindrical portion 8 at an interval of about 60 degrees, the locking grooves 4 and 4 are 180 degrees symmetrical with respect to the center of the cylindrical portion. When the roller pins 6 and 6 are pushed out of the locking grooves 4 and 4 against the coil spring 7 and are separated from each other and rotated 60 degrees, the roller portions 6 and 6 are maintained at intervals of 180 degrees by the engaging portion 5. The two roller pins 6, 6 are engaged with the adjacent locking grooves 4, 4, respectively. While a large torque is applied, the engagement and disengagement of the roller pins 6 and 6 and the locking grooves 4 and 4 are repeated in this way.

  Eventually, when the torque decreases, that is, when the torque becomes lower than the set torque, the state where the roller pin 6 reaches the locking groove 4 is maintained by the biasing force of the coil spring 7, and the inner ring member 2 and the outer ring member 3 Is positioned again and can rotate in conjunction.

Next, an embodiment in which the above-described torque limiter 1 is used in a garbage dewatering device will be described.

  FIG. 3 is an exploded perspective view of a garbage dewatering device using the torque limiter of the present invention.

The garbage dewatering device 13 is attached to a drain outlet at the bottom of a sink of a sink installed in the kitchen. The garbage dewatering device 13 includes a bottomed cylindrical storage body 20 serving as a storage unit that is opened and attached to a drainage outlet, and a bottomed bottom that receives the garbage that is completely stored inside the storage body 20 and falls from the drainage outlet. A cylindrical draining basket 19 and a cover 16 provided with a manual lever 14 as a driving means for covering the draining basket 19 when performing dehydration and rotationally driving the draining basket 19.
And is composed mainly of.

As shown in FIG. 3, the storage body 20 has a flange portion 91 in which the opening side of the cylindrical side wall 93 is bent 90 degrees outward. Further, the opening side of the side wall 93 is a large diameter portion 97, and a female screw 92 is formed on the outer periphery thereof so as to be adjacent to the flange portion 91. Furthermore, a stepped portion 98 is formed on the inner peripheral side, and a plurality of convex portions 99 extending in the axial direction from the stepped portion 98 are formed along the inner periphery. The storage body 20 includes a nut 11 meshed with a male screw 92 so that the flange portion 91 is brought into contact with the upper surface side of the drain outlet and the ring-shaped sealing material 12 is sandwiched from the lower surface side. It is securely attached to the bottom of the sink by tightening. On the other hand, on the bottom side of the cylindrical side wall 93, a drain tube part 94 to which a drain pipe is connected is formed to protrude outward.

A draining basket 19 that receives the garbage falling from the drain outlet is completely stored inside the storage body 20, and a rotary shaft hole 85 to be described later is a shaft that protrudes from the approximate center of the bottom 96 of the storage body 20. It engages with the support protrusion 95 and can rotate horizontally.

The draining basket 19 is formed in a bottomed cylindrical shape whose upper surface is opened using a punching metal. Therefore, a large number of circular dewatering holes 81 are formed in the cylindrical side wall 84 over the entire surface. The draining basket 19 has an upper end of the side wall 84 on the opening side bent 90 degrees outward to form a flange 83, and an uneven portion 82 is formed on the upper surface thereof. The draining basket 19 has the center of the bottom projecting inward and the above-described rotating shaft hole 85 opened downward is recessed, and the shaft support projection 9
5 is engaged.

The drain outlet has a lid 16 that covers a drain basket 19 that is attached when dehydration is performed. The lid 16 has a manual lever 14 as a driving means and a speed increasing wheel train that is mechanically connected to the manual lever 14. 21 and a rotating disk 18 mechanically connected to the speed increasing wheel train 21 and rotatably connected to a draining basket 19 are attached.

The lid 16 is formed in a bottomed cylindrical shape having an open bottom surface, and a plurality of concave portions 57 extending in the axial direction from the opening are formed in the cylindrical side wall 56 along the outer periphery. When the cylindrical side wall 56 of the lid 16 is inserted along the inner periphery of the large-diameter portion 97 of the storage body 20 during dehydration, the concave portion 57 engages with the convex portion 99, thereby Rotation in the direction is prevented.

On the upper surface side of the lid 16, a shaft support protrusion 51 as an upper support portion protrudes from the center thereof, and a ring-shaped recess 52 is formed so as to surround the shaft support protrusion 51. A part of the outer side wall is a cutout portion 55 cut out so as to be connected from the upper surface side to the lower surface side of the lid 16.

Further, on the lower surface side of the lid 16, a shaft support protrusion 53 as a lower support portion is provided so as to be coaxial with the shaft support protrusion 51. Further, on the outer side in the radial direction in the vicinity of the notch 55, the shaft support protrusion 53
A shaft support projection 54 is provided so as to be substantially parallel to the projection.

The speed increasing wheel train 21 includes the drive gear 15 and the torque limiter 1. Drive gear 1
5 is formed in a bottomed cylindrical shape, and the small-diameter protrusion 4 is directed upward from the center of the upper surface of the bottom.
1 is protruded, and the inner peripheral side thereof is rotatably supported by a shaft support protrusion 51 protruding from the upper surface side of the lid 16. Further, serrations are formed on the outer peripheral side. The opening side of the side wall 43 formed in a cylindrical shape is housed in the recess 52, and its lower end is bent 90 degrees outward to form a flange 42, and a tooth portion is formed on the outer periphery and cut. It faces the notch 55.

  On the other hand, in the outer ring member 3 of the torque limiter 1, a tooth portion that meshes with a tooth portion formed on the outer periphery of the flange portion 42 of the drive gear 15 is formed in the notch portion 55, and the flange portion 9 of the inner ring member 2. A tooth portion that meshes with a tooth portion formed on the outer periphery of the small-diameter protrusion 71 of the rotary disk 18 described below is formed on the outer periphery of the cylindrical disk 8, and the shaft support protrusion 54 is inserted on the inner peripheral side of the cylindrical portion 8. Thus, the torque limiter 1 is rotatably supported. In this embodiment, the outer ring member 3 is an input member.

The rotary disk 18 includes a small-diameter protrusion 71 and a flange portion 72 extending radially from the small-diameter protrusion 71, and a tooth portion formed on the outer periphery of the small-diameter protrusion 71 is a flange portion of the torque limiter 1. The shaft support protrusion 53 is inserted into the inner peripheral side of the small-diameter protrusion 71 in a state of meshing with the tooth portion formed on the outer periphery of the shaft 9, and is screwed by a screw 76 through a washer 75 from above to be fixed to the shaft support protrusion 53. It is supported so that it can rotate around.

The flange portion 72 of the rotary disk 18 has an inclined peripheral edge portion 73 whose peripheral end is inclined approximately 45 degrees upward, and the concave and convex portion 82 of the draining basket 19 is engaged downward from the lower surface of the inclined peripheral edge portion 73. An uneven portion 74 is formed. Therefore, during dehydration, the rotation of the rotary disk 18 is transmitted to the draining basket 19 via the uneven portion 74 and the uneven portion 82. Even when the projections and bumps 74 are engaged with each other when the projections and depressions 82 and 74 are engaged, the torque limiter 1 allows the rotation of the rotary disk 18 so that the projections and depressions 74 can be engaged with the projections and depressions 82. It moves to the correct position, and both can engage smoothly.

The manual lever 14 has, on the inner peripheral side, a cylindrical portion 31 formed with serrations that engage with serrations that are engaged with the serrations formed on the outer peripheral side of the small-diameter projection 41 of the drive gear 15;
A flange portion 32 extending from the lower end of the cylindrical portion 31 to the outside in the radial direction and covering the drive gear 15;
It is mainly composed of a lever portion 33 extending from the cylindrical portion 31 to the radially outer side of the flange portion 32. A shaft support protrusion 34 that rotatably supports the knob 35 is provided at the tip of the lever portion 33.
Is formed so as to protrude in the axial direction. The knob 35 has a shaft support protrusion 34 inserted on the inner peripheral side thereof, and is screwed by a screw 37 through a washer 36 from above to be supported rotatably around the shaft support protrusion 34. The manual lever 14 covers the drive gear 15 with its flange portion 32 covered, and the cylindrical portion 31 is serrated and connected to the small protrusion 41 of the drive gear 15 with a screw 39 via a washer 38 from above. By stopping
Both 14 and 15 are integrated so as not to come off, and by rotating the manual lever 14, the drive gear 4
Are rotated together. At this time, the knob 35 can be freely rotated in accordance with the rotation of the manual lever 14.

In the garbage dewatering device 13 of the present invention, the knob 3 of the manual lever 14 at the center of the upper surface of the lid 16.
5 is rotated horizontally by hand, the rotation of the manual lever 14 is transmitted to the drive gear 15 by serration coupling, and further, via the torque limiter 1, the rotating disk 1
8, the rotating disk 18 is rotated at a high speed. Since the rotation of the rotary disk 18 is transmitted through the concavo-convex part 74 and the concavo-convex part 82, the draining basket 19 rotates at a high speed integrally with the rotary disk 18. That is, the draining basket 19 can obtain a great dewatering effect because the rotation of the manual lever 14 is increased about six times by the speed increasing wheel train 21.

(Effect of this embodiment)
As described above, in the torque limiter 1 of the present invention of the present embodiment, torque transmission and non-transmission are switched by the biasing force of the coil spring 7, so that when the frictional force between components is used as in the prior art. Compared with this, there is less wear of parts, and durability can be improved. Further, since it is less susceptible to temperature than in the case of using oil viscosity as in the prior art, the usable conditions can be widened. Furthermore, it can be used as a bidirectional torque limiter with a small number of parts. Further, since the roller pin 6 functions as a torque limiter when engaged with the locking groove 4, it can have a function of positioning the inner ring member 2 and the outer ring member 3.

  In this embodiment, the inner ring member 2 has six locking grooves 4, the outer ring member 3 has two engaging portions 5, and the two roller pins 6 respectively engaged with the engaging portions 5 are formed by the outer ring member 3. When the input torque applied to the motor 1 exceeds the set torque, the coil spring 7 is moved outward, elastically deforms to disengage from the locking groove 4, and engages with the engaging portion 5 to interlock with the outer ring member 3. Therefore, the two roller pins 6 can engage or disengage from the two locking grooves 4 at the same time. Therefore, the degree of freedom of the set torque can be improved and the set torque can be stabilized as compared with the case where there is one roller pin 6.

In this embodiment, the cylindrical portion (inner ring) 8 and the fitting peripheral wall portion (outer ring) 10 are provided concentrically adjacent to the center of rotation, and the input torque applied to the outer ring member 3 exceeds the set torque. And the outer wall of the cylindrical part 8 and the inner wall of the fitting surrounding wall part 10 slide, and the inner ring member 2 and the outer ring member 3 are comprised so that it may rotate relatively. In particular, the six locking grooves 4 are arranged along the circumferential direction of the inner ring member 2, and the roller pin 6 is engaged with the locking groove 4 adjacent to the locking groove 4 before the relative rotation after the relative rotation. It comes to match. Since the two roller pins 6 are arranged at equal intervals in the circumferential direction, the coil spring 7 can be expanded in a balanced manner in the circumferential direction by the two roller pins 6, so that the transmission torque is stabilized, The accuracy of the torque limiter 1 can be ensured.

  In general, since the roller pin 6 has rigidity, when configured in this manner, the inner ring member 2 and the outer ring member 3 can be reliably interlocked when the input torque is equal to or less than the set torque. Further, since the roller pin 6 can smoothly escape without being caught by the edge of the locking groove 4 or the like when the input torque exceeds the set torque, the variation among individuals can be reduced.

  In the garbage dewatering device 13 of this embodiment, the torque limiter 1 including the coil spring 7, the outer ring member 3, and the inner ring member 2 is disposed in the speed increasing wheel train 21 that transmits the output from the manual lever 14 to the draining basket 19. Therefore, even when the manual lever 14 is rotated by the inertial force of the draining basket 19, the draining basket 19 is brought into contact with the knob 35 or the like or the tableware is inadvertently placed in the rotation locus of the manual lever 14. Since the rotation due to the inertial force is interrupted by the torque limiter 1, no problem occurs. Further, although the draining basket 19 transmits the rotation of the manual lever 14 about six times by the speed increasing wheel train 21, it is necessary to rotate the manual lever 14 at 100 rpm for about 20 seconds as a dehydrating operation. If the rotational speed of the manual lever 3 is reduced during that time, it will become a brake for the draining basket 19 that is rotating by inertial force. In this embodiment, even if the rotation speed of the manual lever 14 is reduced, the torque limiter 1 does not serve as a brake for the draining basket 19 that is rotating by inertial force. In addition, since a large load is not applied to the speed increasing wheel train 21, the gears constituting the speed increasing wheel train 210 can be made thinner.

Moreover, since the torque limiter 1 with less wear than before is used, the life of the garbage dewatering device 13 and the maintenance interval can be extended. Furthermore, since the torque limiter 1 that is less susceptible to temperature than the conventional one is used, the garbage dewatering device 13 that can be used under a wider range of conditions can be obtained.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the above embodiment, the locking groove 4, the engaging portion 5, and the coil spring 7 are provided in order from the inside and the coil spring 7 biases the roller pin 6 to the inside. However, the present invention is not limited to this. Groove 4
The engaging portion 5 and the coil spring 7 may be provided in order from the outside, and the coil spring 7 may bias the roller pin 6 outward.

Moreover, in the said form, although it has the six latching grooves 4, the two engaging parts 5, and the roller pin 6, it is not limited to this.

Furthermore, in the said form, although the roller pin 6 is used as a locking member, it is not necessarily limited to the roller pin 6. For example, a spherical locking member may be used.

Furthermore, in the said embodiment, although the projection surface of the coil spring 7 is circular, it is not limited to this, You may make a projection surface into an ellipse or a polygon. In other words, by making the ellipse, the set torque of the torque limiter 1 can be easily changed while keeping the material of the coil spring 7 and the number of windings of the coil spring 7 the same. For example, when the projection surface of the coil spring 7 is elliptical, the two roller pins 6, 6 are easily detached from the locking grooves 4, 4 by urging the roller pin 6 inward on the longer diameter side of the coil spring 7. In addition, it is possible to make it difficult to engage with the locking grooves 4 and 4. Further, by urging the roller pin 6 inward by the short diameter side of the coil spring 7, the two roller pins 6, 6 are difficult to separate from the locking grooves 4, 4 and engage with the locking grooves 4, 4. Can be made easier.

Further, the cross section of the metal wire itself constituting the coil spring 7 may be either a circular cross section or a square face. Generally, since the coil spring 7 becomes strong against stress by making it into a square cross section, the same set torque as the coil spring 7 having a circular cross section can be obtained with a small number of turns, and the size can be reduced.

  Further, in the above embodiment, when the input torque applied to the outer ring member 3 exceeds the set torque, the outer wall of the tubular portion 8 and the inner wall of the fitting peripheral wall portion 10 slide to cause the inner ring member 2 and the outer ring member 3 to move relative to each other. Although it is configured to rotate, it is not necessarily required to slide between the outer wall of the cylindrical portion 8 and the inner wall of the fitting peripheral wall portion 10. That is, when the dimensional accuracy between the outer wall of the cylindrical portion 8 and the inner wall of the fitting peripheral wall portion 10 cannot be ensured, the cylindrical portion 8 may be slid at another portion.

  Furthermore, in the case of the present embodiment, the metal wire constituting the coil spring 7 is continuously wound eight times, but the number of turns of the coil spring 7 is not limited to eight. That is, it may be wound 10 times from what was wound once, and further several tens of times. Moreover, the metal wire which comprises the coil spring 7 does not need to be wound continuously, for example, when winding eight times, by arranging the metal wire wound twice twice in the direction of an axis. It may be configured. When the divided divided coil springs are arranged side by side in the axial direction, the dimensions of the continuous coil springs wound continuously eight times are the same as the dimensions in the axial direction. Therefore, the total movement amount of the four divided coil springs is continuous. Although it is the same as the amount of movement of the coil spring, the amount of movement of one coil spring is 1/4, respectively, so that the amount of movement as one coil spring can be reduced. Therefore, the life of the coil spring 7 can be extended by using the split coil spring as compared with the continuous coil spring.

(A), (B), (C) is the cross-sectional view cut | disconnected by the AA line of (B) in the positioning state of the outer ring member and inner ring member of the torque limiter to which this invention is applied, (A). It is the longitudinal cross-sectional view cut | disconnected by the BB line | wire, and the cross-sectional view in the idling state of an outer ring member and an inner ring member. It is a disassembled perspective view when each member which comprises the torque limiter to which this invention is applied is seen from diagonally upward. It is a disassembled perspective view of the garbage dewatering device using the torque limiter of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Torque limiter 2 Inner ring member 3 Outer ring member 4 Locking groove 5 Engaging part 6 Roller pin (locking member)
7 Coil spring 8 Tubular part (inner ring)
10 Fitting peripheral wall (outer ring)
13 Garbage dewatering device

Claims (10)

An inner ring and an outer ring, and when an input torque applied to an input member configured by either the inner ring or the outer ring is equal to or lower than a set torque, the inner ring and the outer ring are interlocked, and either the inner ring or the outer ring In the torque limiter transmitted to the output member constituted by the other, a locking groove is formed in either the input member or the output member, and a locking member that locks in the locking groove is used as the locking groove. A coil spring to be pressed is provided on the other of the input member and the output member, and when the input torque applied to the input member exceeds the set torque, the locking member elastically deforms the coil spring from the locking groove. The torque limiter is characterized in that the inner ring and the outer ring are disengaged from each other and the input torque is not transmitted to the output member.   2. The plurality of engagements according to claim 1, wherein the engagement member includes a plurality of the engagement grooves, and the other of the input member and the output member is engaged with the engagement members at positions corresponding to the plurality of engagement grooves. A plurality of locking members respectively engaged with the engaging portions, when the input torque applied to the input member exceeds the set torque, the coil spring is elastically deformed to A torque limiter that is disengaged and engages with an engaging portion to interlock with either the input member or the output member.   3. The inner ring and the outer ring according to claim 1 or 2, wherein the inner ring and the outer ring are provided concentrically adjacent to the center of rotation, and the input torque applied to the input member exceeds the set torque. Torque limiter characterized by rotating relative to each other.   4. The plurality of locking grooves according to claim 3, wherein the plurality of locking grooves are disposed along a circumferential direction of either the input member or the output member, and the locking member is rotated after the relative rotation. A torque limiter that engages with the locking groove different from the previous locking groove.   5. The torque limiter according to claim 3, wherein the plurality of locking members are arranged at equal intervals in the circumferential direction.   6. The torque limiter according to claim 1, wherein the locking member is a roller pin.   7. The torque limiter according to claim 1, wherein the coil spring includes a plurality of coil springs.   8. The torque limiter according to claim 1, wherein the coil spring is wound around an outer wall of the outer ring.   9. The locking groove according to claim 8, wherein the locking groove is a groove formed in an outer wall of the inner ring, the engagement portion is a through hole formed in a radial direction of the outer ring, and the locking member is A torque limiter that is disengaged from the engagement groove by moving radially outward in the through hole against the biasing force of the coil spring. A garbage dewatering apparatus using the torque limiter according to claim 1.

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