JP2009279687A - Rotating device and torque machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a preset type torque wrench capable of determining a set torque value of a torque wrench by one scale as compared to a conventional one in which it is determined by reading a main scale and a sub-scale. <P>SOLUTION: An adjusting screw part 1 is directly connected with a rotary dial part 21 arranged at the rear end of the lever 11 of the torque wrench. A first gear part 31 having different number of teeth and a fixed second gear part 32 are arranged on the screw shaft of the screw part 1. A third gear part 33 arranged at the rotary dial part 21 is engaged with the first gear part 31 and the second gear part 32. The first gear part 31 is deceleratingly rotated corresponding to the difference in the number of teeth between itself and the second gear part 32 by revolving the third gear part 33 while making it autorotate through the rotation of the rotary dial part 21. The torque value is displayed at an outer circumferential surface of a driven rotation member 22 equipped with the first gear part 31. The rotation of the driven rotation member 22 is set within a range of not more than one rotation to a plurality of the rotations of the rotary dial part 21 within a predetermined range. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotation device that rotates a driven member at a reduced speed by a gear mechanism following the rotation of an input member, and a torque device such as a torque wrench that uses the rotation device for a scale display mechanism.

  In a torque device such as a torque wrench, presetting torque is set in advance, and when the tightening torque reaches the set torque value, for example, a preset that informs the operator that the toggle mechanism has operated and has reached the set torque value mechanically A type torque wrench has been proposed (Patent Document 1).

  The torque value setting mechanism for setting the set torque value in the torque wrench is arranged in the rear end portion of the tube-shaped operation lever that constitutes the torque wrench. A slider that engages with a screw (rotation is restricted with respect to the operation lever and engages) is screwed in the axial direction, and an adjustment spring disposed between the slider and the toggle mechanism is extended and contracted. A spring pressure corresponding to the torque value is applied to the toggle mechanism.

A main scale plate is attached to a rear end portion of the adjustment screw, a sub-scale plate is attached to the surface of the slider, and a main indication value on the main scale plate indicated by rotation of the adjustment screw, and the slider The torque setting value is read from the sub-indicated value on the sub-scale plate due to the movement in the axial direction.
JP 2000-246661 A

  In the torque value setting mechanism described above, it is necessary to separately read both the main scale plate and the sub scale plate arranged at different positions, and it is difficult to instantaneously read the torque set value.

  In addition, a certain amount of learning was required to read the main scale value and the secondary scale value.

  Furthermore, it takes time to adjust the screwing position of the slider with respect to the adjusting screw and to adjust the mounting of the adjusting screw and the sub-scale plate, and it takes time to assemble and adjust the torque wrench.

  On the other hand, it is conceivable to use a gear planetary mechanism comprising an output member that decelerates and rotates the rotation of an input member (sun gear) via a planetary gear and a planetary lever, for example. Since the mechanism has a large number of parts such as planetary levers and the structure is complicated, the mechanism is increased in size and cost to be accommodated in the lever of the torque wrench. In particular, the planetary gear mechanism is intended to decelerate and rotate the output member relative to the input member, but the torque value setting mechanism does not necessarily require the adjusting screw to be rotated by the decelerated output member.

  An object of the present invention is to provide a rotating device that includes a driven rotating member that is simple in structure and can be reduced in size, and that is driven to rotate while reducing the rotation of an input member.

  Another object of the present invention is to provide a torque device such as a torque wrench that can directly read a torque value setting range without using a main scale and a sub-scale.

  According to a first aspect of the present invention, there is provided a rotation device that achieves the object of the present invention, wherein an input rotation member, a rotatable first gear portion arranged coaxially with a rotation axis of the input rotation member, A fixed second gear portion having the same number of teeth and the same module as the first gear portion arranged coaxially with the first gear portion; and a rotatable second gear portion attached to the input member; and the first gear portion and A third gear portion that meshes with each of the second gear portions and has the same module, and the third gear portion revolves around the rotation shaft by the rotation of the input rotation member. The rotational speed of the first gear portion with respect to the rotation of the input rotating member is made different according to the difference in the number of teeth between the first gear portion and the second gear portion.

  In the rotating device described above, the number of teeth of the first gear portion is made larger than the number of teeth of the second gear portion, and the first gear portion is rotated at a reduced speed with respect to the rotation speed of the input rotating member.

  In the rotating device described above, the first gear portion or both the first gear portion and the second gear portion are transition gears.

  In the rotating device described above, a spring member that abuts against the outer end surfaces of the first gear portion and the second gear portion, respectively, and biases the first gear portion and the second gear portion toward the third gear portion. Was provided.

  In the rotating device described above, the rotating device includes a first member including the first gear portion and a second member including the second gear portion, and the first member and the second member are on the rotation shaft. The hollow shaft portion of the first member was rotatably mounted on the outer periphery of the hollow shaft portion of the second member.

  In the above rotating device, the input rotation member is disposed at the rear end, the second gear portion is disposed in front of the input rotation member, and the first gear portion is disposed in front of the second gear portion. .

  In the rotating device described above, the adjustment screw member fixed on the rotation shaft of the input rotation member and penetrating the hollow shaft portion of the second member, and a predetermined axial distance by rotation of the adjustment screw member. The first member is set to be 1 rotation or less in accordance with the linearly moving member that is screwed and the movement range of the linearly moving member.

  The configuration of the torque device that achieves the object of the present invention includes a toggle mechanism, an adjustment spring that adjustably applies a spring pressure to the toggle mechanism, and a spring pressure of the adjustment spring. A torque value setting mechanism to adjust, and a torque device such as a preset type torque wrench that operates the toggle mechanism when a tightening torque of a fastening member such as a bolt reaches a set torque value, wherein the torque value setting mechanism includes: The rotating device according to claim 7, wherein the adjustment spring is disposed between the linear motion member and the toggle mechanism, and a spring pressure of the adjustment spring is adjusted by rotation of the input rotation member, and A scale of torque values is displayed on the outer peripheral surface of the first member, and an indicator of the scale is displayed on the outer peripheral surface of the second member.

  In the torque device described above, the unit of torque is displayed on the outer peripheral surface of the first member beside the index.

  In the torque device described above, the scale of the torque value is displayed on the surface of an annular scale ring attached to the outer periphery of the first member.

  In the torque device described above, the toggle mechanism, the adjustment spring, and the torque value setting mechanism are disposed in a tube-shaped lever, the input rotation member is disposed rearward from the rear end of the lever, and the input rotation is performed. The first member is disposed in front of the member.

  According to the rotating device of the present invention, the first gear portion can be rotated at a high reduction ratio in the same direction as the rotating direction of the input rotating member with a simple configuration. Further, since the configuration is simple, the assembling work is easy.

  According to the second aspect of the present invention, since the reduction ratio can be set by the number of teeth of the first gear portion and the second gear portion, the reduction ratio can be easily set.

  According to the invention which concerns on Claim 3, it is only necessary to make a 1st gear part or both a 1st gear part and a 2nd gear part into a transfer gear, and the structure of the whole apparatus can be simplified.

  According to the fourth aspect of the invention, when continuous rotation is not required, the backlash is achieved with a simple configuration in which the first gear portion and the second gear portion are spring-biased toward the third gear portion by the spring member. Can be prevented.

  According to the inventions according to claims 5 and 6, the rotating device can be made compact.

  According to the seventh aspect of the present invention, the adjusting screw member can be directly rotated by the input rotating member to cause the linearly moving member to be screwed. Since the member can be accommodated within one rotation, the first member can be used as an information transmission means.

  According to the torque device such as a torque wrench according to the present invention, the main scale and the secondary scale are not required as in the prior art, and the set torque value range is displayed on the outer peripheral surface of the first member rotating within a maximum of 1 rotation or less. Therefore, the range of the set torque value can be determined at a glance, and the set value can be easily determined.

  In addition, since the rotating device according to the seventh aspect is used for the torque value setting mechanism, assembly adjustment of a torque device such as a torque wrench is simplified.

  According to the invention which concerns on Claim 9, the unit of a setting torque value can also be confirmed without a doubt.

  According to the invention which concerns on Claim 10, since it is set as the structure which performs a scale display using a cyclic | annular scale ring, the position adjustment of a scale display can be performed easily.

  According to the invention which concerns on Claim 11, it can utilize effectively for a torque wrench.

  1 to 4 show an embodiment of the present invention. FIG. 1 is an external view of a preset type torque wrench to which the present invention is applied, in which (a) is a top view and (b) is a front view. 2 is a sectional view of the torque value setting mechanism provided in the torque wrench shown in FIG. 1, FIG. 3 is an exploded perspective view of the torque value setting mechanism shown in FIG. 2, and FIG. 4 is a backlash of the torque value setting mechanism shown in FIG. The prevention mechanism is shown.

  In the preset type torque wrench 10 shown in FIG. 1, a head portion 12 in which a socket (not shown) that fits a bolt or the like (not shown) is attached to a tip portion of a metal lever 11 formed in a tube shape has a pin 13. Further, a rotary dial portion 21 that is a torque value setting member of the torque value setting mechanism 20 is rotatably disposed at the rear end portion of the lever 11.

  A toggle mechanism (not shown) is arranged inside the lever 11, and when the lever 11 is rotated to tighten a bolt and the toggle mechanism is actuated when reaching a set torque value, the lever 11 is pinned against the head portion 12. Since the rotation is performed via 13, the operator confirms that the set torque value has been reached. In this toggle mechanism, a toggle lever (not shown) is connected via a connecting pin between the rear end portion of the head portion 12 and a spring receiving member (not shown), and in the set state, the toggle lever is the shaft of the lever 11. Located diagonally to the direction axis. When the tightening torque increases, the head portion 12 moves the spring receiving member rearward against the spring force of the adjusting spring (not shown) via the toggle lever, and the tightening torque increases to reach the set torque value. Then, it is possible to determine that the balance of the force between the head portion 12 and the spring receiving member by the toggle lever has been released and a set torque value has been reached.

  In the present embodiment, the setting torque value is set by rotating the rotary dial portion 21 of the torque value setting mechanism 20. At that time, for example, a rotation angle of 1/10 with respect to the rotation angle of the rotary dial portion 21 is fixed to the outer surface of a driven rotation member (first member) 22 (see FIGS. 2 and 3) that rotates in the same direction. The torque value is set by matching the value of the scale 23 a formed on the formed scale ring 23 with the index 24. The index 24 is displayed on the outer surface of the flange portion 25a of the cylindrical guide member (second member) 25 fixed to the lever 11, and the torque is aligned with the index 24 on the outer surface of the flange portion 25a. In the present embodiment, Nm is displayed as the value unit display 26. The scale ring 23 is positioned and fixed to the driven rotation member 22 by a fixing pin 23p so that the attachment position can be adjusted. For this reason, the scale position and the index 24 can be easily positioned.

  Next, the configuration of the torque value setting mechanism 20 will be described with reference to FIGS.

  As shown in FIG. 2, the torque value setting mechanism 20 has an adjustment screw 1 disposed at the rear end portion in the lever 11, and the flange portion 1 a of the adjustment screw 1 abuts against a stopper nut 2 screwed into the lever 11. This restricts the movement of the adjustment screw 1 in the axial rearward direction. A slider 3 that engages the lever 11 so as not to rotate about the axis and is movable in the axial direction is screwed into the screw portion 1 b of the adjustment screw 1, and the slider 3 is rotated by the rotation of the adjustment screw 1. Screw. A rotary dial portion 21 is fixed to the rear end portion of the adjusting screw 1 by a fixing screw 21a.

  An adjustment spring 4 is disposed between the slider 3 and the spring receiving member, and the slider 3 is screwed forward or backward in the axial direction of the lever 11 by rotating the adjustment screw 1 clockwise or counterclockwise. Thus, the spring force of the adjustment spring 4 is adjusted. That is, the set torque value corresponding to the spring force can be changed. The relationship between the spring force of the adjustment spring 4 and the torque value is determined in advance, and the pitch of the threaded portion in which the adjustment screw 1 and the slider 3 are screwed is also determined in advance. When the alignment position is determined, the torque value for one rotation of the adjusting screw 1 is determined.

  Here, in order to screw the slider 3 between the upper limit value and the lower limit value of the torque value setting range, it is necessary to rotate the rotary dial portion 21 directly connected and fixed to the adjustment screw 1 a plurality of times. On the other hand, in the present embodiment, the driven rotating member 22 that rotates following the rotation of the rotary dial portion 21 is set to one rotation or less using the following reduction rotating device. And the display range of the scale 23a displayed on the scale ring 23 attached to the outer periphery of the driven rotating member 22 is set to be within one round.

  In the present embodiment, a decelerating rotating device that decelerates and rotates the driven rotating member 22 with respect to the rotation of the rotating dial portion 21 will be described with reference to FIGS.

  In this embodiment, the reduction rotation device 30 includes a guide member 25 fixed to the outer periphery of the rear end portion of the lever 11 via a fixing pin 25p, and a driven rotation member 22 coaxially mounted on the outer periphery of the guide member 25. And a first gear portion 31 fixed (or integrally formed) to the rear end of the driven rotation member 22 and a rear end of the guide member 25 at a position behind the first gear portion 31 via a fixing pin 32p. A second gear portion 32 to be fixed, and a third gear portion 33 that is rotatably attached to the inner peripheral portion 34 of the rotary dial portion 21 by a pin 33 a and meshes with both the first gear portion 31 and the second gear portion 32. It consists of.

  And the rotation center of the 1st gear part 31 and the 2nd gear part 32 is arranged in parallel with an axial direction by making the rotation center on the same axis line (in this embodiment, the same axis line as the axis line which makes the rotation center of the adjustment screw 1). The number of teeth (Z1) of the portion 31 and the number of teeth (Z2) of the second gear portion 32 are made different (Z1> Z2).

  Here, considering a state in which the third gear portion 33 meshes only with the second gear portion 32, and assuming that the modules of the third gear portion 33 and the second gear portion 32 are equal, the lever 11 of the torque wrench 10 is When the rotary dial portion 21 is rotated in the clockwise direction when viewed from the rear to the front, the second gear portion 32 is fixed with respect to the lever 11 and cannot rotate, so the third gear portion 33 rotates clockwise. Revolves clockwise while rotating in the direction.

  On the other hand, the module of the first gear part 31 and the module of the second gear part 32 are made equal, the first gear part 31 is used as a transition spur gear, and the first gear part 31 and the third gear part 33 are engaged with each other. ing. Note that both the first gear portion 31 and the second gear portion 32 may be transition gears.

  Here, when it is assumed that the number of teeth of the first gear portion 31 is the same as the number of teeth of the second gear portion 32 and the module is also equal, when the rotary dial portion 21 is rotated, the third gear portion 33 becomes the second gear portion. Although it will rotate by meshing | engagement with 32, each tooth | gear of the 1st gear part 31 will just fit, and the 1st gear part 31 will not be rotationally driven.

  However, while the number of teeth of the first gear portion 31 is different from the number of teeth of the second gear portion 32 as in the present embodiment, for example, the third gear portion 33 is engaged with the second gear portion 32. In the case of one revolution, the third gear portion 33 must make one revolution while meshing with the first gear portion 31 at the same time. Then, while the third gear portion 33 makes one revolution with respect to the first gear portion 31, the difference between the number of teeth (Z2) of the second gear portion 32 with respect to the number of teeth (Z1) of the first gear portion 31 ( Z1−Z2) are meshed excessively, and at this time, the first gear portion 31 is rotated by the difference in the number of teeth.

  That is, since the third gear portion 33 meshes simultaneously with the first gear portion 31 and the second gear portion 32 having different numbers of teeth, when viewed from the number of teeth (Z1) of the first gear portion 31, the first gear The first gear portion 31 rotates at a reduction ratio corresponding to the difference in the number of teeth (Z1−Z2) between the number of teeth (Z1) of the portion 31 and the number of teeth (Z2) of the second gear portion 32.

In this case, the reduction ratio is
Reduction ratio = (Z1-Z2) / (Z1)
Given in.

  For example, if Z1 = 40 and Z2 = 36, the reduction ratio is 1/10, and the first gear portion 31, that is, the driven rotation member 22 rotates once in the clockwise direction by 10 rotations of the rotary dial portion 21. .

  Therefore, if the range of the set torque value is 10 rotations or less of the rotary dial 21, the display range of the scale 23a displayed on the scale ring 23 can be less than or equal to the entire circumference, for example, the range viewed from the upper surface (substantially half circumference) It is also possible to set the display range of the scale 23a. In this case, the range of the set torque value can be determined at a glance.

  In the present embodiment, the guide member 25 includes a small diameter shaft portion 25b and a large diameter shaft portion 25c, and the adjustment screw 1 is passed through the small diameter shaft portion 25b. The driven rotation member 22 is also composed of a large diameter shaft portion 22a and a small diameter shaft portion 22b, and a large diameter shaft portion 22a and a small diameter shaft portion 22b are provided on the outer circumferences of the large diameter shaft portion 25b and the small diameter shaft portion 25c of the guide member 25, respectively. The driven rotation member 22 is rotatably mounted and coaxially supported by the guide member 25 so as to be rotatable. Since the large-diameter shaft portion 22a of the driven rotating member 22 is disposed outward from the outer periphery of the lever 11, the scale 23a of the scale ring 23 attached to the large-diameter shaft portion 22a is exposed over the entire circumference. The surface of the scale ring 23 is flush with the flange portion 25a of the guide member 25. For this reason, the setting range of the torque value can be grasped only by looking at the scale ring 23. Moreover, since the scale 23a can be displayed within the entire circumference of the scale ring 23, the scale can be displayed with the interval widened therebetween, and the visibility can be improved.

  Further, a concave groove portion 34 is formed in the circumferential direction at the front portion of the rotary dial portion 21, and the third gear portion 33 is accommodated in the concave groove portion 34. Accordingly, the first gear portion 31 and the second gear portion 32 are also accommodated in the recessed groove portion 34.

  As shown in FIG. 4A, when the inter-axis distance between the first gear portion 31 and the second gear portion 32 is increased with respect to the third gear portion 33, backlash is caused. In particular, the reference of the first gear portion 31 is caused. Since the circle diameter is smaller than the reference circle diameter of the second gear portion 32, the scale is liable to be shifted when the rotary dial portion 21 is rotated clockwise and counterclockwise.

  Therefore, in the present embodiment, the curved leaf spring member 35 is positioned between the inner periphery of the recessed groove portion 34 and the first gear portion 31 and the second gear portion 32 on the side opposite to the third gear portion 33. The convex portions of the leaf spring member 35 are brought into contact with the outer peripheral surfaces of the first gear portion 31 and the second gear portion 32, and the tooth portions of the first gear portion 31 and the second gear portion 32 are connected to the third gear. The portion 33 can be meshed with no gap.

  In the above-described embodiment, the second gear portion 32 is a fixed gear. However, the rotating device is not limited to this, and the first gear portion 31 and the second gear portion 32 are reversed. Also good.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view which shows embodiment of the preset type torque wrench to which this invention is applied, (a) is a top view, (b) is a front view. Sectional drawing of the torque value setting mechanism provided in the torque wrench shown in FIG. FIG. 3 is an exploded perspective view of the torque value setting mechanism shown in FIG. 2. (A) shows the occurrence state of backlash of the torque value setting mechanism shown in FIG. 3, and (b) shows the backlash prevention mechanism.

Explanation of symbols

1 Adjustment screw 2 Stopper nut 3 Slider 4 Adjustment spring 10 Preset torque wrench 10
DESCRIPTION OF SYMBOLS 11 Lever 12 Head part 13 Pin 20 Torque value setting mechanism 21 Rotation dial part 22 Followed rotation member 23 Scale ring 24 Index 25 Guide member 26 Unit display 30 Deceleration rotation device 31 1st gear part 32 2nd gear part 33 3rd gear part 34 concave groove 35 leaf spring member

Claims (11)

  The input rotating member, the rotatable first gear portion arranged coaxially with the rotation axis of the input rotating member, and the first gear portion arranged coaxially with the first gear portion have different number of teeth. A fixed second gear portion that is equal to each other, a third gear portion that is rotatably attached to the input member, and meshes with the first gear portion and the second gear portion, respectively, and has the same module. According to the difference in the number of teeth between the first gear portion and the second gear portion, the input rotation is caused by the third gear portion revolving around the rotation shaft by the rotation of the input rotation member. A rotating device characterized in that a rotation speed of the first gear portion with respect to rotation of a member is varied. The number of teeth of the first gear portion is made larger than the number of teeth of the second gear portion, and the first gear portion is rotated at a reduced speed with respect to the rotational speed of the input rotation member. The rotating device according to 1.   The rotating device according to claim 2, wherein the first gear portion or both the first gear portion and the second gear portion are transition gears.   And a spring member that abuts against the outer end surfaces of the first gear portion and the second gear portion, respectively, and biases the first gear portion and the second gear portion toward the third gear portion. The rotating device according to any one of claims 1 to 3.   A first member provided with the first gear portion; and a second member provided with the second gear portion. The first member and the second member each have a hollow shaft portion on the rotation shaft. 5. The rotating device according to claim 1, wherein the hollow shaft portion of the first member is rotatably mounted on the outer periphery of the hollow shaft portion of the second member.   The input rotation member is disposed at a rear end, the second gear portion is disposed in front of the input rotation member, and the first gear portion is disposed in front of the second gear portion. Item 6. The rotating device according to any one of Items 1 to 5.   An adjusting screw member fixed on the rotating shaft of the input rotating member and penetrating through the hollow shaft portion of the second member, and a linearly moving member screwed between a predetermined axial distance by the rotation of the adjusting screw member The rotation device according to any one of claims 1 to 6, wherein the first member is set to one rotation or less in accordance with a movement range of the linear motion member. A toggle mechanism, an adjustment spring that adjustably applies a spring pressure to the toggle mechanism, and a torque value setting mechanism that adjusts the spring pressure of the adjustment spring, and a tightening torque of a fastening member such as a bolt is a set torque value A torque device such as a preset type torque wrench that activates the toggle mechanism when
The torque value setting mechanism includes the rotating device according to claim 7, wherein the adjusting spring is disposed between the linear motion member and the toggle mechanism, and the spring of the adjusting spring is rotated by the rotation of the input rotating member. A torque device characterized by adjusting a pressure, displaying a scale of a torque value on an outer peripheral surface of the first member, and displaying an index of the scale on an outer peripheral surface of the second member.   The torque device according to claim 8, wherein a unit of torque is displayed on the outer peripheral surface of the first member beside the index.   10. The torque device according to claim 8, wherein the scale of the torque value is displayed on a surface of an annular scale ring attached to an outer periphery of the first member. The toggle mechanism, the adjustment spring, and the torque value setting mechanism are disposed in a tube-shaped lever, the input rotation member is disposed rearward from the rear end of the lever, and the first rotation member is disposed in front of the input rotation member. The torque device according to claim 8, wherein one member is arranged.

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