JP2013200027A - Torque control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque control device which does not produce noise, vibration and frictional heat when an overload occurs.SOLUTION: A torque control device has a cylindrical shell body 1, a rotary shaft 2 is provided in the shell 1, a transmission body 4 is fitted and provided to an outer periphery of the rotary shaft 2 in a slide fit state, the transmission body 4 is provided with a flange part at its one end, is provided with a pressing body 6 at its other end, and is formed with a middle part in a semi-cylinder shape at its middle, and an annular shaped spring 10 is inserted to the middle part, projections 11 are respectively formed to each of both ends thereof with the phase shifted. Both end surfaces are positioned between pressure contact forms 11 on inner side end surface of the flange part 15 and the pressing body 6, are provided protruding from the inner side of the shell body 1, and are configured so that they can contact any projection 11 of the annular shaped spring 10. A ball 13 is inserted to a ball receiving part of the pressing body 6, a pressure receiving body 12 is provided via the ball 13, and a coil spring or a disc spring 14 is inserted and provided between a back surface of the pressure receiving body 12 and an inner end surface of the shell body 1 in a pressure contact state.

Description

  The present invention relates to a torque control device that is inserted into a rotary shaft that is a drive source and that performs a function of releasing torque transmission when an overload occurs.

  2. Description of the Related Art Conventionally, a torque control device that uses a steel ball for a joint portion that transmits torque is known (see, for example, Patent Documents 1 and 2).

Further, a torque control device that uses a heat-resistant friction plate at a joint portion that transmits torque is also conventionally known (see, for example, Patent Documents 3 and 4).
Japanese Patent Publication No. 7-6550 Japanese Patent Laid-Open No. 7-148669 Japanese Patent No. 3378097 Japanese Patent No. 3378100

  In the torque control device described in the above-mentioned documents 1 and 2, when an overload occurs, the steel ball repeatedly enters and exits from the depression for restraining in a state where the steel ball is subjected to a pressing force, and the entrance and exit sound not only makes noise but also vibration. Damage to equipment due to friction.

  In the torque control devices described in Patent Documents 3 and 4, when an overload occurs, the heat-resistant friction plates slide against each other in a state of receiving a pressing force, so that frictional heat is generated and the device is damaged.

  An object of the present invention is to solve the above-mentioned problems. In the case where an overload occurs, the steel ball does not repeatedly enter and exit from the restraining recess in a state where the steel ball receives a pressing force, so that noise, vibration, friction An object of the present invention is to provide a torque control device that does not generate heat.

  In order to solve the above-mentioned problems, the present invention provides a torque control device, in which a rotating shaft is provided in a cylindrical shell, and a transmission body is fitted to the outer periphery of the rotating shaft in a swallow state. Is provided with a flange at one end and a pressing body connected to a means to cut off the transmission of torque when an overload occurs at the other end, and a semi-cylindrical intermediate portion is formed in the middle. Form springs are inserted, and the annular spring is formed with protrusions shifted in phase at both ends thereof, the inner periphery is fitted in a squeeze state on the rotating shaft, and both end faces are A torque stationary stopper is provided between the two protrusions of the annular spring and protrudes from the inner side of the shell body. Any of the annular springs Characterized in that it is configured to abut the protrusion.

  In order to solve the above-mentioned problems, the present invention provides a torque control device, in which a rotating shaft is provided in a cylindrical shell, and a transmission body is fitted to the outer periphery of the rotating shaft in a swallow state. Is provided with a pressing body having a flange portion at one end and a ball receiving portion at the other end, a semi-cylindrical intermediate portion is formed in the middle, and an annular spring is inserted in the intermediate portion. Protrusions are formed on both ends of the shape spring, the inner circumference is fitted into the rotary shaft in a squeeze state, and both end faces are on the flange part and the inner end face of the pressing body. A torque stationary stopper is inserted between the two projections of the annular spring, and is provided so as to protrude from the inside of the shell body. Configured to be able to abut A ball is inserted into the ball receiving portion of the pressing body, a pressure receiving body is provided through the ball, and a coil spring or a dish is brought into pressure contact between the back surface of the pressure receiving body and the inner end surface of the shell. A configuration characterized in that a spring is inserted is adopted.

  In order to solve the above-mentioned problems, the present invention provides a torque control device, in which a rotating shaft is provided in a cylindrical shell, and a transmission body is fitted to the outer periphery of the rotating shaft in a swallow state. Is provided with a pressing body with a flange part at one end and a convex pyramid part at the other end, a semi-cylindrical intermediate part is formed in the middle, and an annular spring is inserted in the intermediate part. The annular spring is formed with protrusions shifted in phase at both ends thereof, fitted into the rotary shaft in a squeeze state, and both end surfaces are in pressure contact with the flange portion and the inner end surface of the pressing body. The torque stationary stopper is provided between the two projections of the annular spring and protrudes from the inside of the shell, and is in contact with any projection of the annular spring. It is configured to be able to touch, A pressure receiving body having a concave pyramid portion that is opposed to and engages with the convex pyramid portion of the pressing body is provided, and is pressed between the back surface of the pressure receiving body and the inner end surface of the shell body. A configuration is adopted in which a coil spring or a disc spring is inserted into the state.

  In order to solve the above-mentioned problems, the present invention is screwed into a screw provided on the outer periphery of the shell, and is inserted so as to be movable in the axial direction of the shell by rotation, and the inner end face is a coil. A torque control device provided with a torque adjustment dial in contact with an adjuster provided between a spring or a disc spring and the inner end face of the shell is employed.

  In order to solve the above-described problems, the present invention employs a torque control device in which a bush made of oilless metal is provided on the inner periphery of the flange portion and the pressing body.

  In order to solve the above-mentioned problem, the present invention provides an annular spring provided with a projecting portion in which both end portions of the spring body are bent inward, and this is inserted into an annular ring formed with a projection which is a separate member. The torque control device is adopted.

  In order to solve the above-described problems, the present invention employs a configuration in which a drill chuck or the like can be attached to the end of the shell.

In order to solve the above-mentioned problem, the present invention is screwed into a screw provided on the outer periphery of the front portion of the shell, and is inserted so as to be movable in the axial direction of the shell by rotation. A torque adjustment dial is provided in contact with an adjuster provided between the coil spring or the disc spring and the inner end surface of the shell, and the rotating shaft passes through the torque adjusting dial. Use a configuration that can be fitted with a drill chuck.

  In order to solve the above-described problems, the present invention employs a configuration in which a tapered portion such as a rear end portion Nimorous taper of a shell body or a Brown sharp taper is formed.

When overload occurs and torque transmission is interrupted, the rotating shaft and the transmission body are idled relatively, and the ball that has come off the ball receiving section of the transmission body is re-recovered until the overload is eliminated. Will never return.
Therefore, as in the conventional example, the ball is continuously and repeatedly entered and exited from the recess to generate an abnormal noise and vibration, or a torque control device that does not become high temperature due to heat generated by inconvenient part friction.

  Since the fitting portion of the transmission body with the rotating shaft is provided with a bush made of oilless metal, a torque control device is provided that can prevent heat generation when both of them rotate idly.

  Since it has a relatively small cylindrical shape and is compact, it has become a torque control device that can be easily mounted on the spindle of a conventional drilling machine.

  Next, the torque control device of the present invention will be described with reference to the drawings by way of examples.

1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a right side view.
As shown in these drawings, a rotation shaft 2 as an input shaft is inserted at the rotation center of a cylindrical shell 1.

The rotating shaft 2 is configured to be inserted into a rotating shaft that is a drive source (not shown).
On the outer periphery of the shell 1, torque transmitting means 3 which is a driven body made of a gear or worm gear is fitted.

  When the rotary shaft 2 is driven, the torque control device is driven by torque transmitting means 3 that is a driven body that is an output shaft through means for controlling torque described later.

Hereinafter, the means for controlling the torque will be described in detail.
On the outer periphery of the rotating shaft 2, the transmission body 4 is slidably engaged with the outer periphery of the rotating shaft 2 and can be rotated relative to the outer periphery of the rotating shaft 2.

  The fitting part can be provided with a bush which is a sliding bearing, and the bush is made by powder metallurgy, and a partially formed gap is made of oil such as mineral oil, synthetic oil, graphite, molybdenum disulfide, etc. It is also possible to use an oilless metal that includes a solid lubricant and does not require oiling.

As shown in FIGS. 4 and 5, the transmission body 4 includes a pressing body 6 having a disc-shaped flange portion 5 at one end and a disc-shaped flange receiving portion 7 for receiving a ball 13 to be described later. The bush 8 can be provided on the inner periphery of the flange portion 5 and the pressing body 6.
An intermediate portion 9 is formed between the flange portion 5 and the pressing body 6, and the intermediate portion 9 is formed in a semi-cylindrical shape.

An annular spring 10 is inserted in the intermediate portion 9 of the transmission body 4.
The annular spring 10 is the most important component in the present invention. The annular spring 10 has the shape shown in FIGS. 8, 9, and 10, and the protrusions 11 are formed with the phases shifted at both ends.
The ring-shaped spring 10 is fitted in a state where the inner circumference is tightened to fasten the rotary shaft 2, and both end surfaces are inserted into the flange portion 5 and the inner end surface of the pressing body 6 in a press-contact state.

  Two torque-stopping stoppers 25 are provided so as to protrude from the inside of the shell 1, and two of the annular springs 10 can be brought into contact with the two protrusions 11 whose phases are shifted from each other. Are provided between the projections 11.

Although the annular spring 10 can be constituted by a spring and a protrusion 11 alone, a protrusion is formed by bending both ends of the spring body inward as shown in FIG. It may be an integral one inserted into an annular ring formed.
The cross-sectional shape of the spring may be circular or rectangular.

  As shown in FIGS. 6 and 7, the pressure receiving body 12 has a ball receiving portion 121 for receiving the ball 13 on one side, and a circular concave groove for receiving a coil spring or a disc spring 14 described later on the other side. ing.

The ball 13 is interposed between the ball receiving portion 7 of the pressing body 6 and the pressure receiving body 12 and is interposed in a pressure contact state by receiving the elastic force of the coil spring or the disc spring 14.
The coil spring or disc spring 14 is inserted between the pressure receiving body 12 and the adjuster 15 in a compressed state.

  The adjuster 15 has a circular concave groove that receives a coil spring or a disc spring 14 on one side, and a surface that contacts an inner end surface of a torque adjustment dial 17 described later on the other side. A protrusion 16 that engages with a groove 18 formed in the shell 1 is formed in part, and is slidable in the axial direction on the inner periphery of the shell 1 but cannot be rotated. Has been.

The torque adjustment dial 17 is screwed into a screw provided on the outer periphery of the shell body 1 and is inserted so as to be movable in the axial direction of the shell body 1 by rotating.
The torque adjustment dial 17 is provided with a non-rotating socket screw 19 for engaging with the outer periphery of the shell 1 to stop the rotation.
In addition, without providing the torque adjustment dial 17 as a separate member, it is also possible to configure this part as an integral part of the shell 1 and not provide the torque adjustment means.

A specific embodiment in which no torque adjusting means is provided is shown in FIG.
Thrust bearings 21 are mounted on both ends of the rotating shaft 2 via washers 20, and dust seals 22 for preventing intrusion of dust are mounted on the outer sides of the washers 20.

  In the torque control device of the present invention, the operation when the torque is normally transmitted and when the torque is interrupted due to an overload will be described.

First, the case where torque is transmitted normally will be described.
When the rotary shaft 2 is driven, the inner periphery of the annular spring 10 is fitted in a squeeze state where the rotary shaft 2 is fastened, and both end faces are in pressure contact with the flange portion 5 of the transmission body 4 and the inner end face of the pressing body 6. Since the torque is transmitted to the transmission body 4 because it is inserted in the state, it is sequentially transmitted to the pressure receiving body 12 via the balls 13, and the shell from the projecting portion 24 of the shell 1 fitted in the guide groove 23 of the pressure receiving body 12. The torque is transmitted to the body 1 and the torque transmitting means 3 is driven.

A case where torque transmission is interrupted due to an overload will be described.
When the torque transmitted to the pressure receiving body 12 is larger than the set value, the coil spring or the disc spring 14 is contracted, the pressure receiving body 12 is retracted, and the ball 13 is detached from the ball receiving portion 7 of the pressure receiving body 4 so that the shell 1 The rotation stops, the shell 1 and the transmission body 4 rotate relatively, and the torque stationary stopper 25 provided on the shell 1 comes into contact with the protrusion 11 provided on the annular spring 10 to loosen the annular spring 10. A twisting force is applied.

In this case, since the two protrusions 11 of the annular spring 10 are provided out of phase and the two torque stationary stoppers 25 are provided between the two protrusions 11, either left or right Even in the rotational direction, the torque stationary stopper 25 comes into contact with any one of the protrusions 11.
Therefore, it is possible to deal with any rotation direction.

  Since the annular spring 10 expands in the radial direction by this loosening and twisting force, the fitting in the squeeze state in which the rotating shaft 2 is tightened becomes a squeezing state in which a gap is formed between the two.

Further, since the annular spring 10 is loosened in the axial direction as it expands in the radial direction, the end face of the annular spring 10 that is in pressure contact with the flange portion 5 of the transmission body 4 and the inner end face of the transmission body 4 is , Away from the flange portion 5 and the inner end face of the transmission body 4, there is a gap between them.
Therefore, the rotating shaft 2 and the transmission body 4 are idled relatively.

  For this reason, the ball 13 detached from the ball receiving portion 7 of the transmission body 4 does not return to the ball receiving portion 7 again unless the overload is eliminated.

Therefore, unlike the conventional example, the ball does not repeatedly enter and exit from the recess to generate abnormal noise and vibration, or to generate a high temperature due to heat generation due to inconvenient friction.
Furthermore, since the bushing 8 made of oilless metal is provided in the fitting portion of the transmission body 4 with the rotary shaft 2, heat generation when both of them rotate idly can be prevented.

  11 to 16, which is fundamentally different from the first embodiment is that in the first embodiment, the ball 13 disengages from the ball receiving portion 7 of the pressure receiving body 4 to cause torque to the transmission body 4. However, in the second embodiment, the pressing body 6 is formed with a convex pyramid portion 26, and the pressure receiving body 12 is opposed to the convex pyramid portion 26. It is assumed that a concave pyramid portion 27 is provided that engages with this, and the convex pyramid portion 26 of the pressing body 6 is disengaged from the concave pyramid portion 27 of the pressure receiving body 12 so that torque is transmitted to the transmission body. It is a point that prevents it.

  The transmission body 4 has the shape shown in FIGS. 11, 12, and 13, one end of the transmission body 4 has a convex pyramidal portion 26, the pressure receiving body 12 has the shape shown in FIGS. 14, 15, and 16, and the pressure receiving body. The end facing the 12 transmission bodies is a concave pyramid portion 27.

A guide groove 28 is formed in the axial direction of the outer periphery of the pressure receiving body.
This embodiment is applied when the transmission torque is relatively small and does not require a ball, so the number of parts can be reduced.

  As shown in FIG. 18, the fundamental difference from the first embodiment is that the end of the shell 1 can be mounted with a drill chuck 29 so that a drill or thread tap can be mounted. It is.

  In this case, since the torque control device has a relatively small cylindrical shape and is compact, it can be easily mounted on the spindle of a conventional drilling machine.

  The fourth embodiment shown in FIG. 19 is basically different from the third embodiment in that when the drill chuck 29 is mounted, the third embodiment is mounted at the end of the shell 1. In this embodiment, the rotary shaft 2 can be mounted.

  Specifically, it is screwed into a screw provided on the outer periphery of the front portion of the shell 1, and is inserted so as to be movable in the axial direction of the shell 1 by rotating, and the inner end face is a coil spring or a disc spring 14. And a torque adjustment dial 17 in contact with an adjuster 15 provided between the inner end surfaces of the shell 1 and the rotary shaft 2 is assumed to penetrate the torque adjustment dial 17, and a drill is formed at the front end of the rotary shaft 2. The chuck 29 can be attached. A torque transmission means 3 is provided on the outer periphery of the shell 1.

By adopting this configuration, the torque adjustment dial 17 can be positioned immediately after the drill chuck 29, so that the torque adjustment dial 17 can be easily operated.
In addition, as compared with the third embodiment in which the shell 1 is connected to the torque transmission means 3, the shell 1 thicker than the rotating shaft 2 can be directly mounted, so that the structure is highly rigid. be able to.

  The fifth embodiment shown in FIG. 20 is basically different from the fourth embodiment in that, in the fourth embodiment, a gear is attached to the outer periphery of the shell 1 and connected to the torque transmission means 3. In this embodiment, a taper such as a Morse taper or a brown sharp taper is formed at the rear end of the shell 1.

If a taper portion 30 such as a Morse taper or a brown sharp taper is formed at the rear end portion of the shell 1, the shell 1 can be directly mounted on a spindle such as a drilling machine or a lathe.

The taper adapter 31 marketed as a standard product can also be attached to the taper portion.
In this case, since it can be handled as a single unit as a drill chuck with a torque control device, it can be a product that can be circulated by itself with high versatility.

The present invention can be used as the following apparatus.
(1) Torque control device for electric drills and tappers.
(2) Torque control devices such as hoist hoisting machines, elevator hoisting machines, winches, chain blocks, etc. using a geared motor.
(3) Torque control device for an electric door using a worm gear.
(4) A torque control device for a speed increaser and a speed reducer using a gear.
(5) Torque control device for an electric reel for fishing.
(6) A torque control device for a turntable for mannequins used in department stores and the like.
(7) Torque control device for swinging device of electric fan (8) Drill chuck unit with torque control device.

It is sectional drawing of the torque control apparatus of this invention. It is a top view of the torque control device of the present invention. It is a side view of the torque control device of the present invention. It is a top view of a transmission body. It is a side view of a transmission body. It is a front view of a pressure receiving body. It is AA sectional drawing of FIG. It is a ring-shaped spring top view. It is a top view at the time of making the protrusion 11 into the annular ring of another member in an annular shaped spring. It is a front view at the time of making the protrusion 11 into the cyclic | annular ring of another member in a cyclic | annular spring. It is a side view of the transmission body in Example 2. It is a front view of the transmission body in Example 2. FIG. It is a top view of the transmission body in Example 2. 6 is a front view of a pressure receiving body in Embodiment 2. FIG. 6 is a side view of a pressure receiving body in Embodiment 2. FIG. It is a bottom view of the pressure receiving body in Example 2. It is sectional drawing of the torque control apparatus in Example 3. It is sectional drawing of the torque control apparatus in Example 3. It is sectional drawing of the torque control apparatus in Example 4. It is sectional drawing of the torque control apparatus in Example 5.

DESCRIPTION OF SYMBOLS 1 Shell body 2 Rotating shaft 3 Torque transmission means 4 Transmission body 5 Flange part 6 Pressing body 7 Ball receiving part 8 Bush 9 Intermediate part 10 Annular spring 11 Protrusion 12 Pressure receiving body 13 Ball 14 Coil spring or disk spring 15 Adjuster 16 Protrusion Part 17 Torque adjustment dial 18 Groove 19 Socket screw 20 Washer 21 Thrust bearing 22 Dust seal 23 Guide groove 24 Projection part 25 Torque stationary stopper 26 Convex pyramid part 27 Concave pyramid part 27
28 Guide groove 29 Drill chuck

Claims (10)

  A rotating shaft is provided in a cylindrical shell, and a transmission body is fitted to the outer periphery of the rotating shaft in a torsional state. The transmission body has a torque at a torque when an overload occurs at one end and a flange portion at the other end. A pressing body connected to the means for interrupting transmission is provided, a semi-cylindrical intermediate portion is formed in the middle, and an annular spring is inserted in the intermediate portion, and each of the both ends of the annular spring is inserted into the annular spring. Protrusions are formed with the phases shifted from each other, the inner periphery is fitted into the rotary shaft in a squeeze state, and both end surfaces are inserted in pressure contact with the flange portion and the inner end surface of the pressing body. A stopper is provided between the two protrusions of the annular spring so as to protrude from the inside of the shell, and is configured to be able to contact any one of the protrusions of the annular spring. Torque system characterized by Apparatus.   A rotating body provided with a rotating shaft in a cylindrical shell, and a transmitting body fitted into the outer periphery of the rotating shaft in a torsional state, the transmitting body having a flange portion at one end and a ball receiving portion at the other end A semi-cylindrical intermediate portion is formed in the middle, and an annular spring is inserted in the intermediate portion, and the annular spring is formed with protrusions with shifted phases at both ends thereof, The inner periphery is fitted into the rotary shaft in a squeezed state, both end surfaces are inserted in pressure contact with the flange portion and the inner end surface of the pressing body, and two torque stationary stoppers are provided for the annular spring. Between the projections of the shell and is provided so as to protrude from the inside of the shell, and is configured to be in contact with any of the projections of the annular spring. A ball is inserted and Pressure receiving body is provided Te, the torque control device, characterized in that a coil spring or Belleville spring is inserted into pressure contact between the back and the inner end surface of the shell of the receiving pressure body.   A rotating shaft is provided in a cylindrical shell, and a transmitting body is fitted in a swallow state on the outer periphery of the rotating shaft. The transmitting body has a flange portion at one end and a convex pyramid portion at the other end. And a semi-cylindrical intermediate part is formed in the middle, and an annular spring is inserted in the intermediate part, and the annular spring has projections shifted in phase at both ends thereof. Formed and fitted to the rotating shaft in a squeezed state, both end surfaces are inserted in pressure contact with the flange portion and the inner end surface of the pressing body, and a torque stationary stopper is provided for the two annular springs. It is located between the protrusions and is provided so as to protrude from the inside of the shell body, and is configured to be in contact with any protrusion of the annular spring, and is formed on the convex pyramid-shaped portion of the pressing body. Concave pyramid facing and engaging with it The pressure receiving body is provided equipped part, the torque control device, characterized in that a coil spring or Belleville spring is inserted into pressure contact between the back and the inner end surface of the shell of the receiving pressure body.   It is screwed into a screw provided on the outer periphery of the shell, and is inserted so as to be movable in the axial direction of the shell by rotating. The inner end surface is between the coil spring or the disc spring and the inner end surface of the shell. The torque control device according to any one of claims 1 to 3, further comprising a torque adjustment dial in contact with the adjuster provided.   The torque control device according to any one of claims 1 to 4, wherein a drill chuck can be attached to an end of the shell.   It is screwed into a screw provided on the outer periphery of the front part of the shell body, and is inserted so as to be movable in the axial direction of the shell body by rotating, and the inner end face is a coil spring or a disc spring and the inner end face of the shell body. The torque according to any one of claims 1 to 3, wherein a torque adjustment dial in contact with an adjuster provided therebetween is provided, and the rotating shaft penetrates the torque adjustment dial. Control device.   The torque control device according to claim 6, wherein a drill chuck can be attached to a tip portion of the rotating shaft.   The torque control device according to claim 7, wherein a taper portion such as a Morse taper or a Brown sharp taper is formed at a rear end portion of the shell.   The torque control device according to any one of claims 1 to 8, wherein a bush made of an oilless metal is provided on an inner periphery of the flange portion and the pressing body. 2. The annular spring according to claim 1, wherein the annular spring is provided integrally with an annular ring provided with projections formed by bending both ends of the spring body inward, and forming a projection as a separate member. The torque control device according to claim 9.

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