JPH10123000A - Torque driver tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely and surely detect the instructed torque value of a dial type 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 and positioned in parallel to the axial core of a torque input shaft 12 according to the length of a dial type torque driver 36 by the operation of a positioning screw 43. The driver 36 is then 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 a rotating handle 45 is then manually rotated, the driver 36 is rotated to transmit the load by the driver 36 to the input shaft 12, and the torque display value by a torque sensor 13 is gradually raised. The handle 45 is further rotated to fix the dial indicated value of the driver 36 in a prescribed position, and it is visually compared with the torque on an indicator 14, whereby the precision of the dial indicated value of the driver 36 can be 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 command torque value of a dial torque driver, and more particularly to a rotation mechanism of a dial torque driver to be verified. The present invention relates to a torque driver capable of effectively applying power to a sensor shaft of a torque driver tester to improve the measurement accuracy.

[0002]

2. Description of the Related Art A conventional torque driver tester for verifying an indicated torque value of a dial type torque driver is, for example, an input shaft in which a bit 2 of a dial type torque driver 1 to be verified is engaged as shown in FIG. Adapter 4 with 3 and sensor 5 coupled to this adapter
And a display 6 for displaying a verification value based on the output of the sensor 5. To verify the indicated torque value by the dial of the dial-type torque driver 1 with this torque driver tester, the dial-type torque driver is used. The bit 2 of 1 is engaged with the input shaft 3 of the tester, and then the dial-type torque driver 1 is rotated in the screw tightening direction (measurement direction) by the examiner's hand, and the dial-type torque driver 1 is turned on. This is to test the indicated value accuracy of the dial type torque driver 1 by comparing the indicated torque value indicated by the dial 7 and the pointer 8 with the indicated torque value by the sensor 5.

[0003]

However, the indicated torque value of a dial-type torque driver 1 (hereinafter simply referred to as a driver) using a torque driver tester having such a structure (hereinafter simply referred to as a tester). In order to improve the accuracy of the test value, it is required that the axis of the driver coincides with the axis of the input shaft of the tester. Therefore, in the conventional example shown in FIG. While maintaining vertical
Measuring power must be added to driver 1.

[0004] In addition, at the time of a test for verifying the dial indication value of the dial type torque driver 1 with a torque driver tester, the driver turns while applying manual force to the driver, and simultaneously visually confirms the indication value at the time of rotation and the display value of the tester. Therefore, it was difficult to carry out the test work. Furthermore, when verifying the dial indication value of the high torque dial type torque driver 1,
A great deal of human energy is required to apply a load to the driver with human power, and this causes the hand that applies rotational power to the driver to shake, which causes the indication shake on the dial surface and the display value on the tester. It has been difficult to perform a highly accurate test of the indicated value in a dial-type torque driver due to run-out and the like.

[0005] Further, if a strong manual force is applied to the input shaft 3 of the tester through the bit 2 of the driver, a thrust (a force that causes the bit to rise) is generated, and torque crossing may occur. Was.

[0006] 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. Difficulty and slight differences due to individual differences of the examiners, but a tilt in the radial direction occurs, and this tilt in the radial direction of the driver adversely affects the operation of the driver at the time of the test, which leads to variations in the test values and This was a factor that caused the test accuracy to be poor.

[0007] 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. It is possible to accurately and easily read the indicated values of the dial and the tester at the time when the rotation is stopped, while positioning the driver at the same time and rotating the driver smoothly, and stopping the rotation of the driver. It is an object of the present invention to develop a support operation mechanism of a driver, and to easily and surely verify a command torque value of a driver to be verified accurately and without being influenced by individual differences of testers.

[0008]

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 possible arm, a cylindrical loading case rotatable via a bearing by the arm, and supported rotatably about an extension axis of the torque input axis, and an outer periphery of the loading case A worm gear integrally formed on the surface, meshed with the worm gear, and rotatably supported by the arm; Worm, a rotating handle for rotating the worm, and a symmetrical movement in a radial direction that is supported by the loading case and that is bounded by an extension axis of the torque input shaft and that is orthogonal to the axis. A torque driver tester comprising: a pair of saddles that are supported so as to be able to move the pair of saddles in a symmetric direction, and an operation dial for holding or removing a driver to be verified by the pair of saddles. It is characterized by:

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

[0010]

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 has 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 in 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. A loading case 28 is rotatably supported inside the through hole 26 via a bearing 27 made of, for example, a bearing.

A concave groove 29 is formed in the upper surface of the loading case 28, and a pair of saddles 30A, which are provided with the center of the through hole 26 as a boundary, are formed in the concave groove 29.
30B is fitted movably in the radial direction of the loading case 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.

Reference numeral 33 denotes a side plate integral with the loading case 28. The side plate 33 rotatably supports a screw rod 34 meshing with the pair of saddles 30A, 30B. One end of this screw rod 34
The operation dial 35 used for rotating the is fixed. The meshing screw between the screw rod 34 and the saddles 30A and 30B is a screw 34A, 34B in the opposite direction. By rotating the screw rod 34, the two saddles 30A, 30B move in opposite directions. It moves along the concave groove 29, and the handle portion of the driver 36 to be verified can be clamped by both saddles 30A and 30B.

Reference numeral 37 denotes both saddles 30A and 30B,
In order to prevent the slide plate 37 from being detached from the concave groove 29, the slide plate is integrally connected to the loading case 28 by mounting screws 38, and the edges of the slide plate 37 are provided on the saddles 30A and 30B. Guide groove 39
Is engaged.

Reference numeral 40 denotes an annular worm gear fixed around the outer periphery of the loading case 28 by a fixing pin 41. A worm 42 meshes with the worm gear 40. The worm 42 is fixed to an operation shaft 43 rotatably supported by the loading case 28.
Is mounted with a rotary handle 44. Reference numeral 45 denotes a stopper ring that prevents the loading case 28 from coming off the arm 22.

Reference numeral 46 denotes a friction ball partially fitted in a bottomed hole 47 formed in a vertical surface of the arm 22. The friction ball 46 is a spring 48 housed in the bottomed hole 47. 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 2
1 is prevented from dropping carelessly. Reference numeral 49 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 46 and the vertical standing 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. The loading mechanism 21 is positioned at an arbitrary vertical position in accordance with the size (length) of the dial-type driver 36 to be verified by operating the positioning screw 43 for the loading prevention mechanism 21.

Next, a dial-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 bit is inserted and engaged in an adapter 19 integral with the torque input shaft 12 of the tester 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 portion 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, by rotating the rotating handle 44 to rotate the worm 42 manually, the worm gear 40
Then, the loading case 28 rotates, and at the same time, the driver 36 rotates, and the load from the driver 36 is transmitted to the input shaft of the tester main body via the adapter 19, and the torque display value by the torque sensor gradually increases. Further, the rotating handle 44 is rotated to set the driver 3
6 is fixed at a predetermined position, and the accuracy (error) of the dial indication value by the driver 36 can be easily detected by visually comparing the torque value obtained by the torque tester with the display 14 at this time.

In the above embodiment, the use of the tester body in which the torque input shaft is arranged vertically 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.

[0025]

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 shaft is not subjected to the axial pressing force of the driver, etc., so that the torque value of the dial-type driver can be accurately determined by the torque tester without adversely affecting individual differences etc. by the test operator. In addition, the test operation can be easily performed without requiring special skills.

The turning operation of the dial-type torque driver to be verified is extremely easy by operating the rotating handle 44. Therefore, the rotating load on the driver 36 is reduced by operating the rotating handle 44. It can be easily given, and the operability (workability) of the driver to be verified is greatly improved. Rotating handle 4
Since the turning power of No. 4 is performed through a speed reducing mechanism by a worm and a worm gear, the rotation of the rotary handle is smooth, and the rotational position of the driver can be stopped and held at an arbitrary position. It is easy to confirm the indicated value of the dial.

Further, since the tester body is provided with a rotation restricting member 16 and rotation restriction screws 18A and 18B for preventing the torque input shaft from excessive rotation by the driver's bit, the screwdriver is turned around. 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 longitudinal sectional view of only a loading mechanism according to the embodiment of the present invention.

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

FIG. 6 is a cross-sectional view of only the loading mechanism according to the embodiment of the present invention.

FIG. 7 is an essential part plan view showing a structure near the torque input shaft according to the embodiment of the present invention;

FIG. 8 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 regulating screw 19 ... Adapter 20 ... Mounting screw 21 ... Loading mechanism 22 ... Arm 23 ... Vertical wall 24 ... Dovetail 25 ... Protrusion 26 ... Through hole 27 ... Bearing 28 ... Loading case 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 ... Worm gear 41 ... Pin 42 ... Warm 43 ... Operation shaft 44 ... Rotating handle 45 ... Stopper ring 46 ... Friction ball 47 ... Bottomed hole 48 ... Spring 49 ... 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);
A cylindrical loading case (28) rotatable by the arm (22) via a bearing (27) and rotatably supported about an extension axis of the torque input shaft (12). A worm (40) integrally formed on the outer peripheral surface of the loading case (28); and a worm (42) meshed with the worm gear (40) and rotatably supported by the arm (22). ), A rotating handle (44) for rotating the worm (42), and an extension axis of the torque input shaft, which is supported by the loading case (28), and A pair of saddles (30A) and (30B) supported so as to be symmetrically movable in the orthogonal radial direction, and a pair of saddles (30A).
A) An operation dial (35) for moving the driver (36) to be verified by the pair of saddles (30A) and (30B) by moving the (A) and (30B) symmetrically. A torque driver tester characterized by: 2. The method according to claim 1, further comprising a rotation restricting means (16), (18A), (18B) of the torque input shaft (12) for preventing excessive torque of the torque input shaft (12). The torque driver tester according to claim 1, wherein