JPH10122999A - Torque driver tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely and surely detect the set torque value of a preset torque driver without being influenced by the individual difference of testing person by providing a loading mechanism movable in parallel to the axial core of a torque input shaft. SOLUTION: A loading mechanism 21 is moved in parallel to the axial core of a torque input shaft 12 according to the length of a preset type torque driver 36 and positioned by the operation of a positioning screw 43. The driver 36 is vertically inserted to a through-hole 26 in the center of the loading mechanism 21, and the bit of the driver 36 is inserted to and engaged with the adapter 19 of the input shaft 12. When an operation ring is manually rotated, the driver 36 is rotated, the load by the driver 36 is transmitted to the input shaft 12, and the torque display value by a torque sensor 13 is gradually raised. When the operating ring is further rotated, the toggle ring within the driver 36 is operated. The torque value in this toggle ring operation is displayed on an indicator 14, and the set torque value of the driver 36 is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver supporting operation mechanism applied to a torque driver tester for measuring a set torque value of a preset type torque driver, and particularly to a preset type torque driver to be verified. The present invention relates to a torque driver capable of effectively applying the rotating power to a sensor shaft of a torque driver tester to improve the measurement accuracy.

[0002]

2. Description of the Related Art In a conventional torque driver tester for verifying a set torque value of a preset type torque driver, for example, as shown in FIG. 7, a bit 2 of a preset type torque driver 1 to be verified is engaged. An adapter 4 having an input shaft 3, a sensor 5 connected to the adapter, and an indicator 6 for displaying a verification value by the output of the sensor 5 are provided. In order to verify the set torque value of 1, the bit 2 of the preset type torque driver 1 is engaged with the input shaft 3 of the tester, and then the preset type torque driver 1 is manually operated by the examiner.
The toggle link in the preset type torque driver 1 rotates until the toggle link operates (that is, in the measurement direction), and the torque display value by the sensor 5 at the time when the toggle link operates is visually confirmed by the display 6. This is to verify the set torque value of the preset torque driver 1.

[0003]

However, the preset torque of a preset type torque driver 1 (hereinafter simply referred to as a driver) using a torque driver tester (hereinafter simply referred to as a tester) having such a structure as described above. When the value is verified, it is required that the axis of the driver coincides with the axis of the input shaft of the tester in order to enhance the accuracy of the test value. Therefore, in the conventional example shown in FIG. Must be added to the driver 1 by hand while maintaining the vertical position. However, there is a variation in the manner in which the tester gives the tester's rotational force, and a highly accurate test can be performed. Have difficulty. In other words, when a strong hand force is applied to the input shaft 3 of the tester via the driver's bit 2, a thrust (a force that causes the bit to rise) is generated, and a torque loss may occur.

[0004] It is very difficult to impart manual rotation to the driver while maintaining the vertical state of the driver 1 with respect to the input shaft 3 of the tester. Although it becomes difficult and there is some difference depending on the individual difference of the examiner, the inclination in the radial direction occurs, and the inclination of the driver in the radial direction has an adverse effect on the driver's operation at the time of certification, which leads to variations in the calibration value and the calibration accuracy. It was a factor of causing defects.

[0005] The present invention has been made in view of the above, so that the axis of the driver to be verified with respect to the input shaft provided in the torque driver tester matches the axis of the input shaft. Developing a driver's support operation mechanism that allows the driver to rotate smoothly while positioning the driver at the same time, accurately setting the torque value of the driver to be verified without being affected by individual differences of the tester, The purpose is to easily and reliably test.

[0006]

According to a first aspect of the present invention, there is provided a torque tester having a torque input shaft associated with a torque detection sensor, wherein the torque tester includes an axis of the torque input shaft. A guide parallel to the core and a loading mechanism movable along the guide in a direction parallel to the axis of the torque input shaft, wherein the loading mechanism moves along the guide. A movable arm, an operating ring rotatable via a bearing by the arm, and supported rotatably about an extension axis of the torque input shaft axis; A pair of saddles supported by the input shaft as a boundary and extending symmetrically in a radial direction perpendicular to the axis and a pair of saddles; By movement, it is characterized by a torque screwdriver tester consists an operation dial for allowing clamping or releasing the driver to be assayed by a pair of saddles.

According to a second aspect of the present invention, in addition to the first aspect, a torque driver tester provided with a rotation restricting means for the input shaft for preventing excessive rotation of the input shaft.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the drawings.

Reference numeral 11 denotes a main body of a torque driver tester (hereinafter simply referred to as a tester). The tester main body 11 includes a torque input shaft 12 and a torque input shaft 1.
And a torque sensor 13 associated with the control panel 15 which is operated based on the output from the torque sensor 13.
Is provided. Since the configuration of the tester body described above is well known, further detailed description will be omitted.

The torque input shaft 12 is connected to the torque input shaft 12.
The rotation restricting member 16 is connected to a fan-shaped rotation restricting member 16.
Each of the rotation restricting screws 18A screwed by a pair of supports 17 supported integrally with the case 1
18B are arranged close to each other. 19 is a rotation restricting member 16
2 shows an adapter of the input shaft fixed by the mounting screw 20. Therefore, the rotation range of the adapter 19, that is, the rotation range of the input shaft 12, is restricted by the positional relationship between the rotation restricting member 16 and the rotation restricting screws 18A and 18B. Is prevented beforehand.

Next, the structure of the loading mechanism 21 will be described.

Reference numeral 22 denotes a dovetail-shaped ridge 25 which is fitted into a vertical dovetail groove 24 formed in a vertical upright wall 23 provided integrally with the case of the tester main body 11,
The arm 22 is movable only in the vertical direction along the dovetail groove 24, and the arm 22 has a through hole 26 penetrating in the vertical direction. An operation ring 28 is rotatably supported inside the through hole 26 via a bearing 27 made of, for example, a bearing.

The diameter of the upper surface of the operation ring 28 is
A pair of saddles 30 </ b> A and 30 </ b> B opposed to each other with the center of the through hole 26 as a boundary is fitted in the concave groove 29 so as to be movable in the radial direction of the operation ring 28. A friction material 31 for preventing slippage when holding the driver is fixed to the center of the opposing surfaces of the pair of saddles 30A and 30B by mounting screws 32.

A side plate 33 is integrated with the operation ring 28. The side plate 33 has a pair of saddles 30A,
A screw rod 34 meshing with 30B is rotatably supported, and an operation dial 35 used to rotate the screw rod 34 is fixed to one end of the screw rod 34. The meshing screws of the screw rod 34 and the saddles 30A and 30B are screws 34A and 34B of opposite directions, and by rotating the screw rod 34, both the saddles 30
A and 30B move along the concave groove 29 in the opposite direction to each other, and can hold the handle portion of the preset type driver 36 to be verified by both saddles 30A and 30B.

37 designates both saddles 30A, 30B,
In order to prevent the slide plate 37 from being detached from the concave groove 29, the slide plate 37 is integrally connected to the operation ring 28 by a mounting screw 38.
A and 30B are engaged with guide grooves 39 provided in the same.

Numeral 40 denotes a friction ball partially fitted in a bottomed hole 41 formed in a vertical plane of the arm 22. The friction ball 40 is a spring 42 accommodated in the bottomed hole 41. Is pressed against the wall surface of the vertical upright wall 23 under the above-mentioned elastic pressure to increase the contact resistance between the vertical upright wall 23 and the arm 22 to thereby increase the dovetail groove 2 of the tester body.
4, the centering with the torque input shaft 12 can be easily and reliably performed, and the loading mechanism 21
Is not accidentally dropped. Reference numeral 43 denotes a positioning screw of the loading mechanism 21.

The above is the present embodiment. Next, its operation will be described. As shown in FIG. 1, first, the ridge 25 provided on the arm 22 of the loading mechanism 21 is inserted into the dovetail groove 24 provided on the tester main body 11 from above. At this time, the friction ball 40 and the vertical upright wall 2
3 due to the frictional force generated between
Can be prevented from accidentally dropping, the damage of the loading mechanism 21 can be prevented, and the axis of the loading mechanism 21 and the axis of the torque input shaft 12 of the tester main body can be accurately matched. Then, by operating the positioning screw 43, the loading prevention mechanism 21 is positioned at an arbitrary vertical position according to the size (length) of the preset type driver 36 to be verified.

Next, a preset type torque driver 36 (hereinafter simply referred to as a driver) is vertically inserted from above in a through hole 26 formed in the center of the operation ring 28 of the loading mechanism 21, and the driver 36 is inserted. Is inserted into an adapter 19 integral with the torque input shaft 12 of the tester main body. The shape (size) of the arm 22 is set in advance so that the center axis of the adapter 19 and the center axis of the operation ring 28 of the loading mechanism 21 match.

Next, by rotating the operation dial 35, both the pair of saddles 30A and 30B are moved in the direction of sandwiching the handle of the driver 36, and the saddles 30A and 30B are connected to the driver via the friction material 31. 3
Hold the handle of No. 6 and fix it. This makes a pair of saddles 3
0A and 30B, the axis of the driver is aligned with the axis of the torque input shaft 12, and the driver 36
The setting of the driver 36 to be verified and held by the loading mechanism in the loading mechanism is completed.

Next, when the peripheral surface of the operation ring 28 is manually rotated, the driver 36 rotates at the same time, and the load from the driver 36 is transmitted to the input shaft of the tester body via the adapter 19, and the torque sensor Causes the torque display value to gradually increase. Further operation ring 28
Is turned, the toggle link in the driver 36 operates, the torque value at the time of the toggle link operation is displayed on the display 14, and the set torque value of the driver 36 can be detected.

In the above embodiment, the use of the tester body in which the torque input shaft is vertically arranged is described. However, the present invention is not limited to this, and the torque input shaft is set horizontally or in any other direction. It is possible to use the loading mechanism 21 of the present invention even in the case of the torque tester described above.

[0022]

As described above, according to the present invention, by using the above-described loading mechanism 21, the axis of the driver to be verified can be accurately matched with the axis of the torque input shaft of the tester body. The input torque of the driver is not affected by the axial pressing force of the driver, etc. In addition, the test operation can be easily performed without requiring special skills.

Since the outer diameter of the operation ring 28 is larger than the outer diameter of the handle portion of the driver 36, it is possible to easily apply a rotational load to the driver 36 by rotating the operation ring 28. As a result, the test operability (workability) of the driver to be tested is greatly improved.

Further, the tester body is provided with a rotation restricting member 16 and rotation restricting screws 18A and 18B for preventing the torque input shaft from being excessively rotated by the bit of the driver. It is possible to prevent damage to the torque sensor or the like due to passing.

[Brief description of the drawings]

FIG. 1 is a cutaway side view showing an embodiment of a torque driver tester according to the present invention.

FIG. 2 is a front view showing an embodiment of a torque driver tester according to the present invention.

FIG. 3 is a plan view of a torque driver tester according to an embodiment of the present invention without a loading mechanism.

FIG. 4 is a sectional view of only a loading mechanism according to the embodiment of the present invention.

FIG. 5 is a plan view of only the loading mechanism according to the embodiment of the present invention.

FIG. 6 is a main part plan view showing a structure near a torque input shaft according to the embodiment of the present invention.

FIG. 7 is an explanatory view of a conventional torque driver tester.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Tester main body 12 ... Torque input shaft 13 ... Torque sensor 14 ... Display 15 ... Operation panel 16 ... Rotation restricting member 17 ... Support body 18A, 18B ...
Rotation restricting screw 19 ... Adapter 20 ... Mounting screw 21 ... Loading mechanism 22 ... Arm 23 ... Vertical upright wall 24 ... Dovetail 25 ... Protrusion 26 ... Through hole 27 ... Bearing 28 ... Operation ring 29 ... Concave groove 30A, 30B ...
Saddle 31 ... friction material 32 ... mounting screw 33 ... side plate 34 ... screw rod 35 ... operation dial 36 ... driver 37 ... slide plate 38 ... mounting screw 39 ... guide groove 40 ... friction ball 41 ... bottomed hole 42 ... spring 43 ... positioning Screw

Claims (2)

[Claims] 1. A torque tester having a torque input shaft (12) associated with a torque detection sensor, wherein said torque tester is provided with a guide (24) parallel to the axis of said torque input shaft (12). , The guide (2
4) A structure having a loading mechanism (21) movable along a direction parallel to the axis of the torque input shaft (12) along the guide (24). A movable arm (22);
An operation ring (28) rotatable by the arm (22) via a bearing (27), and supported rotatably about an extension axis of the torque input shaft (12); A pair of saddles (30A) and (30B) supported on the upper surface of the operation ring (28) so as to be symmetrically movable in a radial direction orthogonal to the axis of the extension of the torque input shaft as a boundary, The pair of saddles (30
A) and (30B) are symmetrically moved, and the pair of saddles (30A) and (30B) are provided with an operation dial (35) for holding or removing a driver (36) to be verified. A torque driver tester characterized in that: 2. A torque input shaft rotation restricting means (16) for preventing excessive rotation of the torque input shaft (12).
The torque driver tester according to claim 1, wherein (18A) and (18B) are provided.