JPH058449U - Torque wrench checker - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Accurately and easily measure the set torque of various torque wrenches with a single checker. [Structure] Torque transmission shafts 11 to 14 having various torque capacities suitable for respective ranges of a torque wrench are provided. The torque transmission shafts 11 to 14 include, for example, socket type, spanner type, and eyeglass spanner type adapters 17 to 20.
Install. Various torque wrenches whose torque accuracy is to be checked (measured) are engaged with a torque transmission shaft of a suitable range through an adapter suitable for the range of the torque wrench to measure. The torque value is displayed on the display unit 35.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a torque wrench checker for checking a torque set value of a torque wrench by applying an external force to the torque wrench.

[0002]

[Prior Art]

 As a conventional torque wrench checker of this type, that is, a torque wrench checker for checking the torque value of a torque wrench, there is, for example, the structure shown in FIG. 1 (Japanese Utility Model Publication No. 54-13992), that is, this known example. Is a torque wrench meter 5, a loading lever 1 having one end pivotally fixed to an input shaft of the torque meter, a torque wrench lever support pin 2 which can be fixed at an arbitrary position in the longitudinal direction of the lever, and the torque. The torque wrench checker is rotatably supported by a frame 3 integrated with a lever casing, and includes an operating mechanism for rotating the loading lever 1 about a torque meter input shaft 4 as a fulcrum.

[0003]

[Problems to be solved by the device]

 However, in the torque wrench checker having such a configuration, only the torque value of the torque wrench of the same model (same range) in which the torque capacity set in the torque wrench is the same is checked. In order to measure the respective torque values of different torque wrenches, various torque wrench checkers with different torque capacities had to be prepared in advance. In the torque-lench checker, it is necessary to replace the adapter and the workability is poor.There is also a torque wrench tester with several torque sensor shafts, but if you try to check the torque sensor shaft of various torque capacities, Since the zero point adjustment and the gain adjustment of the torque sensor axis are required for each axis, the torque accuracy adjustment becomes complicated and the workability is poor.

[0004]

[Means for Solving the Problems]

 The present invention has been made in view of such a conventional problem, and it is equipped with a torque transmission shaft having various torque capacities suitable for each range of a torque wrench, and these torque transmission shafts include, for example, a socket type and a spanner type. , An eyeglass spanner type adapter, etc., and various torque wrenches whose torque accuracy should be checked (measured) are engaged with the applicable torque transmission shaft via an adapter that fits the range of the torque wrench to achieve various torques. It is an object of the present invention to provide a torque wrench checker capable of extremely easily and accurately checking the torque setting values of various torque wrenches having heads of various shapes and capacities.

[0005]

【Example】

 The present invention will be described in detail below based on the embodiments shown in the drawings.

2 to 5, 10 is a checker case, and on the front surface of the case 10, various torque transmission shafts 11 of channels (CH1), (CH2), (CH3), (CH4), 12, 13, 14 are rotatably supported via bearings 15 and bearings 16. Further, eyeglass type adapters 17 and 18 are attached to the torque transmission shafts 11 and 13, and spanner type adapters 19 and 20 are attached to the torque transmission shafts 12 and 14 by screw connection. Reference numeral 21 denotes a torque sensor shaft having a strain gauge 22 attached to the center of the checker case 10. One end of the torque sensor shaft 21 is rotatably supported via a bearing 15 and a bearing 16. The other ends are fixed by the fixed base 23 so as not to rotate. Driven gears 24, 25, 26 having different gear ratios are fixed to the torque sensor shaft 21, and a driven gear 27 fixed to the torque transmission shaft 11 meshes with the driven gear 24. A drive gear (not shown) fixed to the torque transmission shafts 12 and 13 meshes with the driven gear 25, and a drive gear 28 fixed to the torque transmission shaft 14 meshes to the driven gear 26. Is. A fitting hole 29 for a hexagonal bar wrench is formed in each of the adapters 19 and 20. The torque transmission shafts 11, 12, 13, 14 and the drive gears 27, 28 engaged with the torque transmission shafts are provided on the torque transmission shafts 11, 14 as shown in FIGS. 6 and 7. The key 30 and the key groove 31 having a width larger than the key width are engaged with each other with some play in the circumferential direction. Further, the drive gears 27 and 28 are internally provided with a rotation sensor 32, and the torque transmission shafts 11 and 14 are provided with sensor marks 33. Further, between the torque transmission shafts and the drive gears. In FIG. 6, a spring 34 for urging the drive gears 27, 28 in the clockwise direction is interposed with respect to the torque transmission shafts 11, 14.

An operation panel 36 having a torque value display section 35 is provided on the upper part of the case 10.

The configuration of the present embodiment is as described above. Next, the operation thereof will be described. As shown in FIG. 8, first, a torque wrench 37 whose torque value (capacity) should be checked is set in the torque wrench. The torque wrench 37 is fitted with an adapter 19 which is a channel (CH1 to CH4) corresponding to torque (CH2 in this embodiment) and which is the same size as the socket provided in the head of the torque wrench 37. A test force F is applied to. When the test force F acts on the adapter 19, the torque transmission shaft 12 rotates via the adapter 19. The torque transmission shaft 12 freely rotates by the play angle θ, but the torque transmission shaft 12 is rotated (see FIG. 7), and the sensor mark 33 is displaced from the rotation sensor 32. Which of the torque transmission shafts 12, 13 and 14 has been operated is detected, and in this embodiment, it is detected that the adapter 19 of the torque transmission shaft 12 is selectively used, and is input to the operation panel 36.

When the torque wrench 37 is further rotated, the torque is transmitted to the driven gear 25 via the drive gear, and as a result, the torque sensor shaft 21 is forced to rotate, so that the strain gauge 22 is distorted. The torque value until the toggle link of the torque wrench 37 is operated is displayed on the display unit 35.

That is, the torques having different torque capacities input from the respective adapters are detected by the torque sensor as the same torque value via the drive gear and the driven gear. At the same time, the torque display value suitable for the torque transmission shaft measured by the signal of the rotation sensor 32 is switched.

When the torque wrench 37 is removed from the adapter 19 after the torque value is thus measured, the driven gear 25 and the torque transmission shaft 12 of the channel (CH2) of the driven gear 25 are restored by the spring 34. As a result, the rotation sensor 32 is turned off, and the pre-measurement state is automatically restored by an external or auto reset signal.

[0012]

[Effect of the device]

 As described above, according to the present invention, in the torque wrench checker, a plurality of torque transmission shafts, one torque sensor shaft having a strain gauge attached, the torque sensor shaft, and the respective torque transmission shafts are provided. Each gear coupling means, which is meshed and connected with a different gear ratio, each adapter for attaching the torque wrench head of various sizes and shapes, which is attached to each torque transmission shaft, and each torque transmission shaft, The engagement means for coupling the gears of the respective gear coupling means with play in the rotational direction, the rotation sensor for detecting the idle operation of each of the torque transmission shafts, and the output from the rotation sensor The torque wrench checker has a torque display section that switches the display range and detects and displays a wide range of torque from large torque to small torque with a torque wrench. According to the above, since various torque wrench heads are equipped with various adapters corresponding to various sockets, the torque capacity can be checked with one checker for each torque wrench. it can. Also, a plurality of torque transmission shafts equipped with various types of adapters are connected to a single torque sensor shaft through gear coupling means, and the torque sensor shaft and the strain gauge attached to this torque sensor shaft are connected to the respective torque transmission shafts. Since it is commonly used for the strain gauge, it is possible to minimize the number of strain gauges and torque sensor shafts used, improve the economical efficiency of the checker, and further reduce the size.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional example.

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

FIG. 3 is a side view showing an embodiment of a torque wrench checker according to the present invention.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is an explanatory diagram of a main part configuration of the present embodiment.

FIG. 6 is an explanatory diagram showing an engagement relationship between a drive gear and a torque transmission shaft.

FIG. 7 is an explanatory diagram of an operation state of FIG.

FIG. 8 is an explanatory diagram when checking the torque of the torque wrench.

[Explanation of symbols]

10: Case 11: Torque transmission shaft 12: Torque transmission shaft 13: Torque transmission shaft 14: Torque transmission shaft 15: Bearing 16: Bearing 17: Adapter 18: Adapter 19: Adapter 20: Adapter 21: Torque sensor shaft 22: Strain gauge 23: Fixed Base 24: Driven Gear 25: Driven Gear 26: Driven Gear 27: Drive Gear 28: Drive Gear 29: Spanner Fitting Hole 30: Key 31: Key Groove 32: Rotation Sensor 33: Sensor Mark 34: Spring 35: Torque value display section 36: Operation panel 37: Torque wrench

Claims (1)

[Claims for utility model registration] 1. In a torque wrench checker, a plurality of torque transmission shafts, a torque sensor shaft having strain gauges attached thereto, the torque sensor shaft, and the respective torques. Each gear coupling means for meshingly connecting the transmission shaft with the gear ratio changed, each adapter for mounting the torque wrench head of various sizes and shapes mounted on each of the torque transmission shafts, and each of the above Engaging means for coupling the torque transmission shaft and the gear of each gear coupling means with play in the rotational direction, a rotation sensor for detecting the idle operation of each torque transmission shaft, and a rotation sensor from the rotation sensor. The torque level is characterized by having a torque display section that switches the torque display range by output and detects and displays a wide range torque from a large torque to a small torque by a torque wrench. Ji checker.