KR20090093790A - Torque load test device - Google Patents

Abstract

A torque load testing device is provided to prevent torsion torque of a driving shaft and an outer shaft from being zero although an alternation torque is loaded to a testing shaft. A torque load testing device comprises a driving shaft(1), a testing shaft(11), and an outer shaft(21). The driving shaft comprises first and second driving gears(6,7). The driving shaft is rotated with a rotary diving unit. The testing shaft comprises first and second testing gears(12,13), a test piece mounting unit(18), and a torque loading device(14) for the test piece. The torque loading apparatus for the test piece applies load torque on a test piece mounted on the mounting unit. The outer shaft comprises first and second gears(22,23) of the outer shaft and a pre-torque setting device(24). The pre-torque setting device sets pre-torque by relatively rotating the second gear of the outer shaft to the first gear of the outer shaft. The axis center of parts is arranged on the closed loop.

Description

Torque Load Test Device {TORQUE LOAD TEST DEVICE}

The present invention relates to a torque load test apparatus capable of applying load torque to a specimen that is a test object mounted on a test shaft.

The conventional torque load test apparatus is described in patent document 1, for example. This conventional example rotates the drive shaft 02 by the drive motor 01, as shown in FIG. The drive shaft 02 is provided with a drive shaft first gear 03 and a drive shaft second gear 04, the gears 03 and 04 for testing the test shaft 011 via the intermediate gears 06 and 07. The first gear 012 and the test shaft second gear 013 are engaged with each other. The test shaft 016, which is a test object such as a vehicle shaft or a constant velocity joint, is mounted on the test shaft 011. When the drive shaft 02 moves, the specimen 016 rotates via the gear mechanism. In addition, a rotary actuator (017) is formed in the drive shaft (02), and the rotary actuator (017) rotates the drive shaft second gear (04) relative to the drive shaft first gear (03) to generate torque. I'm making it. The torque of this rotary actuator 017 is transmitted to the specimen 016 which rotates via the said gear mechanism, and a torsional torque is loaded on the specimen 016. As shown in FIG.

[Patent Document 1] Japanese Unexamined Patent Publication No. 55-20415

Since the meshing gear has a backlash (a gap between teeth of the meshing gears), when the rotation of the drive motor 01 is transmitted, for example, the gears 03 and 04 of the drive shaft 02 are used. As shown in Fig. 9 (a), the torque is transmitted from the drive shaft 02 to the intermediate gears 06 and 07 while contacting the teeth on the entry side of the intermediate gears 06 and 07. In addition, when torque is applied by the rotary actuator 017, one of the gears 03, 04 of the drive shaft 02 abuts on the teeth of the entry side of the intermediate gears 06, 07, and the other is shown in Fig. 9B. As shown in Fig. 6, the intermediate gears 06 and 07 abut against teeth on the evident side, and the intermediate gear 06 and the intermediate gear 07 are loaded with torques in opposite directions to each other. This torque is transmitted to the test shaft first gear 012 and the test shaft second gear 013, and the test shaft first gear 012 and the test shaft second gear 013 of the test shaft 011 are opposite to each other. Torsional torque is applied to the specimen 016 mounted on the test shaft 0 1 1 in order to rotate in the direction. In this way, the torque from the rotary actuator 017 is transmitted to the test shaft 011 via the gear mechanisms 03, 04, 06, 07, 012, 013.

By the way, there exists a case where it loads the alternating torque which changes the direction of torque alternately to the specimen 016. In such a case, for example, when one of the gears 03 and 04 of the drive shaft 02 in contact with the teeth on the entry side of the intermediate gears 06 and 07 changes the direction of the torque, the intermediate gears 06, 07) teeth on the eviction side. This contacting of teeth occurs every time the direction of the torque changes. In this switching, a period in which the gears 03 and 04 are not in contact with the teeth of the intermediate gears 06 and 07, that is, a period in which the torque is 0, occurs, and as shown in Fig. 8B, the torque The waveform is not smooth, and a flat portion appears and deforms near the point where the torque is zero. In this way, for example, one gear 03, 04 of the drive shaft 02, which is in contact with the teeth of the entry side of the intermediate gears 06, 07, rotates and moves on the exit side of the intermediate gears 06, 07. The gap (gap) required until it contacts this is called backlash as mentioned above. As described above, when the gear has a backlash, and the contact of the contact occurs, the waveform of the alternating torque is deformed as described above, and the teeth of the gear engaged with the contact of the contact between the contact collide and impact force is applied. The durability of the is lowered.

The problem to be solved is that in the torque load test apparatus capable of applying load torque to the specimen, when alternating torque is applied to the specimen, the waveform of the torque is not smooth and deformed, and the durability of the gear is low.

The torque load test apparatus of the present invention can apply a load torque to the specimen 17. The torque load test apparatus is driven by the rotation drive device 2, and includes a drive shaft 1 including a drive shaft first gear 6 and a drive shaft second gear 7, a drive shaft first gear, A test shaft first gear 12 for engagement, a test shaft second gear 13 for engagement with a drive shaft second gear, a specimen mounting portion 18 on which the specimen is detachably mounted, and a specimen mounted on the specimen mounting portion. A test shaft 11 including a torque load device 14 for applying a torque, an outer shaft first gear 22 meshing with the test shaft first gear, and an outer shaft second meshing with the test shaft second gear. An outer shaft 21 having a gear 23 and a pre-torque setting device 24 for rotating the outer gear second gear relative to the outer shaft first gear to set the pre-torque; Equipped. The shaft center of the drive shaft first gear, the test shaft first gear, the outer shaft first gear, the outer shaft axis, the outer shaft second gear, the test shaft second gear, the drive shaft second gear, and the drive shaft are arranged in a closed loop shape. .

Moreover, the pretorque setting device may be provided in the drive shaft in some cases.

Further, in the pre-torque setting device, the relative angle between the outer shaft first gear and the outer shaft second gear or the relative angle between the drive shaft first gear and the drive shaft second gear is set, and the The teeth may be brought into close contact with each other to remove the influence of the backlash of the gear mechanism of the closed loop.

Moreover, two or more test shafts are arrange | positioned between a drive shaft and an outer shaft, and test shaft 1st gears and test shaft 2nd gears may mesh | engage with each other in the adjacent test shaft.

And the pretorque setting device may be comprised by the differential reducer which can be rotated with the case 31. As shown in FIG.

Moreover, the torque load device for specimens may generate the alternating torque which turns a direction of torque alternately.

In addition, a test torque load device for applying a load torque to a specimen mounted on the specimen mounting portion is disposed on any one of the drive shaft, the test shaft, and the outer shaft, and the drive shaft first gear, the test shaft first gear, and the outer shaft are provided. The first gear, the shaft center of the outer shaft, the outer shaft second gear, the test shaft second gear, the drive shaft second gear and the shaft center of the drive shaft are arranged in a closed loop, and the meshing teeth of the gear mechanism on the closed loop are brought into close contact with each other. The influence of the backlash of the gear mechanism of the said closed loop may be eliminated in some cases.

According to the present invention, an outer shaft is disposed in addition to the test shaft on which the specimen is mounted and the drive shaft for rotationally driving the test shaft. Since the pretorque setting device is formed, the pretorque is set to the gear mechanism of the closed loop by the pretorque setting device so that the torsional torque of the drive shaft and the outer shaft is not zero even when the alternate torque is applied to the test shaft. . As a result, the influence of backlash can be prevented and the waveform of the torque applied to the specimen can be smoothly changed.

1 is an example of the schematic conceptual diagram of 1st Example of the torque load test apparatus in this invention.

2 is a conceptual diagram of a pretorque setting device after pretorque setting.

3 is a conceptual diagram of a pretorque setting device before pretorque setting.

4 is an explanatory diagram for explaining tooth engagement of a gear.

It is explanatory drawing for demonstrating the torque etc. at the time of a test.

6 is an example of a schematic conceptual diagram of a second embodiment of a torque load test apparatus according to the present invention.

7 is an example of the schematic conceptual diagram of 3rd Example of the torque load test apparatus in this invention.

8 is an explanatory diagram of a conventional example, in which (a) is a schematic diagram and (b) is a waveform diagram of torque applied to a specimen.

It is explanatory drawing for demonstrating the meshed state of the gear of a prior art example.

Explanation of symbols for the main parts of the drawings

1 drive shaft

2 electric motor (driving drive)

6 drive shaft first gear

7th drive shaft second gear

11 Test Shaft

12 Axial first gear for test

13 Axial gear 2 for test

14 Rotary Actuator (torque load device for specimen)

17 specimen

18 specimen mounting

21 Outer Shaft

22 outer shaft first gear

23 outer shaft second gear

24 pre torque setting device

31 Case of pre torque setting device

In the torque load test apparatus capable of applying load torque to the specimen, even if the alternating torque is applied to the specimen, the waveform of the torque can be smoothly changed and the durability of the gear can be improved. In addition to the test shaft and the drive shaft for rotationally driving the test shaft, an outer shaft arranged in a closed loop is formed by the drive shaft and the gear mechanism, and a pretorque setting device is formed on at least one of the outer shaft or the drive shaft, and the pretorque setting is performed. The apparatus achieves this by setting the pre-torque to the gear mechanism of the closed loop and removing the influence of the backlash of the gear mechanism of the closed loop.

Example 1

Next, the 1st Example of the torque load test apparatus in this invention is demonstrated using FIGS. 1 is an example of the schematic conceptual diagram of 1st Example of the torque load test apparatus in this invention. 2 is an example of a conceptual diagram of a pretorque setting device after pretorque setting. 3 is a conceptual diagram of a pretorque setting device before pretorque setting. 4 is an explanatory diagram for explaining tooth engagement of a gear. It is explanatory drawing for demonstrating the torque etc. at the time of a test. 1 and 5 are shown in the state seen from above when each axis is arranged in the horizontal direction, and FIGS. 2 and 3 are shown in the state seen from the transverse side (lower side in FIG. 1). It goes without saying that each axis may be arranged in the vertical direction, of course.

In FIG. 1, the drive shaft 1 is rotationally driven by the electric motor 2 (symbol: MOTOR in figure) which is a drive device for rotation. The drive shaft 1st gear 6 and the drive shaft 2nd gear 7 are fixedly attached to the shaft body of the drive shaft 1, and the gears 6 and 7 rotate as it is integrated with the shaft body of the drive shaft 1.

The test shaft 11 includes a test shaft first gear 12 that meshes with the drive shaft first gear 6, a test shaft second gear 13 that meshes with the drive shaft second gear 7, and a torque load device for a specimen. Hydraulic actuator (14: code in the drawing: R / A), torque sensor (16: code in the drawing: T / C), specimen (17: code in the drawing: T / P) The mounting part 18 is provided. The test shaft first gear 12 is fixed to a cylindrical outer shaft 12a. The shaft body (inner shaft) of the test shaft 11 penetrates through the inner space of the outer shaft 12a, and the test shaft first gear 12 is capable of rotating movement with respect to the shaft body of the test shaft 11. And the rotary actuator 14 is attached to the shaft body of the test shaft 11, and the edge part of the outer shaft 12a. The main body of the rotary actuator 14 is fixed to the outer shaft 12a and rotates integrally with the test shaft first gear 12. And the rotary actuator 14 rotates the shaft body of the test shaft 11 connected to the output shaft of the rotary actuator 14 with respect to the outer shaft 12a by the supplied hydraulic pressure. The test piece 17 is connected to the output shaft of the rotary actuator 14 through one end via the torque sensor 16 or the like and is integrally rotated, and the other end is connected to the test shaft second gear 13 to be integrally rotated. . At this time, it is assumed that the test shaft first gear 12 and the test shaft second gear 13 are rotationally stopped or synchronously rotated (not relatively displaced) by the rotation of the output shaft of the rotary actuator 14. Torsional torque is applied to the specimen 17. Moreover, the torque sensor 16 formed in the shaft body of the test shaft 11 detects the load torque applied to the specimen 17. In this manner, the main body of the rotary actuator 14 is rotated synchronously with the test shaft first gear 12, the output shaft is connected to one end of the specimen 17, and the other end of the specimen 17 is connected to the test shaft second. The gear 13 is rotated in synchronization. Then, when hydraulic pressure is supplied to the rotary actuator 14 to be driven, and the output shaft is rotated, the torsion torque is loaded on the specimen 17.

The outer shaft 21 has an outer shaft first gear 22 that meshes with the test shaft first gear 12, an outer shaft second gear 23 that meshes with the test shaft second gear 13, and a free torque. The setting device 24 is provided. The outer shaft first gear 22 is fixed to the cylindrical outer shaft 22a. A shaft body (inner shaft) of the outer shaft 21 penetrates through the inner space of the outer shaft 22a, and the outer shaft first gear 22 is rotatable with respect to the shaft body of the outer shaft 21. In addition, the outer shaft second gear 23 is fixed to the shaft body of the outer shaft 21. The pretorque setting device 24 makes the outer shaft second gear 23 rotate relative to the outer shaft first gear 22. Then, the drive shaft first gear 6, the test shaft first gear 12, the outer shaft first gear 22, the shaft center of the outer shaft 21, the outer shaft second gear 23, the test shaft second gear 13, the shaft center of the drive shaft 2nd gear 7 and the drive shaft 1 is arrange | positioned in the closed loop shape. In addition, the gears 6, 7, 12, 13, 22, 23 are comprised by cylindrical gears, such as a helical gear and a spur gear. The rotation arrow in FIG. 1 has shown the rotation direction by the electric motor 2, and the rotation direction of each axis. Of course, it is also possible to reverse each.

In FIG.2 and FIG.3, the pre-torque setting apparatus 24 which is a differential mechanism is comprised by the planetary gear mechanism as a differential speed reducer, The 1st gear 26, the 2nd gear 27, and the 3rd gear 28 are shown. ), The fourth gear 29, the cylindrical case 31 covering these gears 26 to 29, the case flange 32, the input shaft 33 projecting outward from the case 31, and the input shaft ( The input shaft flange 34 formed in 33 is provided. The input shaft 33 of the pretorque setting device 24 protrudes as an output shaft of the pretorque setting device 24 from the other end of the case 31 (the end of the mounting portion side of the pretorque setting device 24), and the outside thereof. It is connected to the shaft body of the shaft 21 and rotates integrally. The disk-shaped input shaft flange 34 is fixed to the input shaft 33, rotates integrally, and splines (multiple grooves) are formed on the outer circumferential surface thereof.

The first gear 26 is a large gear, the shaft of which is cylindrical, connected to the outer shaft 22a of the cylindrical outer shaft first gear 22 to rotate integrally with the outer shaft 22a. do. In addition, the case 31 is rotatable about the axis center of the outer shaft 22a of the outer shaft first gear 22. The second gear 27 is a small gear having a smaller diameter than the first gear 26 while being engaged with the first gear 26. The third gear 28 is a larger gear than the second gear 27 and the fourth gear 29, and meshes with the fourth gear 29. And the 2nd gear 27 and the 3rd gear 28 are being fixed to the shaft body rotatably bearing to the case 31, When it integrally rotates and the case 31 rotates, It revolves around the shaft center of outer shaft 22a. The fourth gear 29 is a small gear, which is fixed to the input shaft 33 and integrally rotates. The disc shaped case flange 32 is formed at the end of the case 31, rotates integrally with the main body of the case 31, and has splines formed on the outer circumferential surface thereof in the same manner as the input shaft flange 34. As shown in FIG.

Spline is formed in the inner peripheral surface of the cylindrical coupling 36 detachably fitted to the input shaft flange 34 and the case flange 32. When the coupling 36 is fitted to the input shaft flange 34 and the case flange 32, the case flange 32 is not rotatable relative to the input shaft flange 34, and the case 31 is the input shaft 33, the outer side. It rotates integrally with the shaft body of the shaft 21 and the outer-axis second gear 23. Moreover, since the case 31 rotates integrally with the input shaft 33, the second gear 27 and the third gear 28 revolve integrally with the case 31, but do not rotate. And the 1st gear 26 meshed with the 2nd gear 27 to revolve rotates in unison with the revolution of the 2nd gear 27. As shown in FIG. As a result, the first gear 26 and the outer shaft first gear 22 are rotated integrally with the shaft body of the input shaft 33 or the outer shaft 21.

Moreover, the fixing device 41 which makes the case 31 non-rotable with respect to the installation surface in which the torque load test apparatus is provided is provided. If the coupling device 36 is removed from the input shaft flange 34 and the case flange 32 while the fixing device 41 is fixing the case 31, and the input shaft 33 is rotated, the pre-torque setting device By the gear mechanisms of the gears 26 to 29 of the 24, the input shaft 33 and the outer shaft first gear 22 are differential, and the rotation angle of the input shaft 33 (that is, the outer shaft second gear 23). ), The outer shaft first gear 22 rotates at a smaller rotation angle. Therefore, the outer shaft second gear 23 is angularly displaced (phase shifted) relative to the outer shaft first gear 22 and the pretorque is set.

In the torque load test apparatus comprised in this way, the test which loads an alternating torque is performed, rotating the specimen 17, such as a vehicle shaft and a constant velocity joint.

At the time of this test, first, the electric motor 2 and the rotary actuator 14 are stopped, and the specimen 17 is made to be isolate | separated from the specimen mounting part 18. FIG. And as shown in FIG. 3, the coupling 36 of the pre-torque setting apparatus 24 is isolate | separated from the case flange 32 and the input shaft flange 34. As shown in FIG. In addition, the fixing device 41 is fixed with the bolts 42 to fix the case 31 so as not to rotate.

Next, the input shaft 33 is rotated as shown by arrow r1 in FIG. 4, and the outer shaft second gear 23 is differentially rotated relative to the outer shaft first gear 22. That is, with the rotation of the input shaft 33, the outer shaft second gear 23 rotates at the same angle in the direction of the arrow r1 as the input shaft 33, while the outer shaft first gear 22 is the input shaft 33. Is rotated at an angle smaller than the rotation angle of the input shaft 33 in the same direction as the arrow r1. When rotating in the direction of the arrow r1 of the outer shaft second gear 23, the test shaft second gear 13 meshed with the outer shaft second gear 23 rotates in the direction of the arrow r2. And when the test shaft second gear 13 rotates in the arrow r2 direction, the drive shaft second gear 7 meshed with the test shaft second gear 13 will rotate in the arrow r3 direction. Since the drive shaft first gear 6 is fixed to the drive shaft 1 together with the drive shaft second gear 7, the drive shaft first gear 6 rotates in the direction of the arrow r3 in synchronization with the drive shaft second gear 7. In this way, when the drive shaft first gear 6 rotates in the direction of the arrow r3, the test shaft first gear 12 meshed with the drive shaft first gear 6 rotates in the direction of the arrow r4. And as mentioned above, since the outer-axis 2nd gear 23 and the outer-axis 1st gear 22 are differential, the clearance gap which existed in the meshing of a gear mechanism becomes small gradually, and the teeth of the meshing gears become Close contact eliminates the influence of the gap (backlash) between the gears. Then, the outer shaft second gear 23 and the test shaft second gear 13 are engaged, the test shaft second gear 13 and the drive shaft second gear 7 are engaged, the drive shaft first gear 6 and the test shaft The engagement of the shaft first gear 12 and the engagement of the test shaft first gear 12 and the outer shaft first gear 22 are respectively K1, K2, K3, K4 and when viewed from the side (lower side in Fig. 4). Become together. Further, even if the input shaft 33 is rotated in the opposite direction to the arrow r1, the backlash can be removed although the direction is different.

In the state where the influence of this backlash is removed (that is, the teeth of the meshing gears are in close contact), further rotation of the input shaft 33 in the direction of the arrow r1 causes torsional torque to the outer shaft 21 and the drive shaft 1. In pre-torques t1 and t2 are generated. When the free torques t1 and t2 become the desired sizes, as shown in FIG. 2, the coupling 36 is fitted to the case flange 32 and the input shaft flange 34, and the input shaft flange 34 is inserted into the case. It is fixed so as not to rotate relative to the flange 32. In addition, the bolt 42 is loosened to release the fixing device 41 so that the case 31 of the pretorque setting device 24 is rotatable.

Next, the specimen 17 is attached to the specimen mounting part 18, and a test is performed.

At the time of a test, the electric motor 2 is rotated to a fixed direction (R1 direction in FIG. 5), and the alternating torque T1 is loaded to the specimen 17 by the rotary actuator 14. Moreover, as shown in FIG.

When the electric motor 2 rotates in the R1 direction, as shown in FIG. 5, the drive shaft 1, the test shaft 11, and the outer shaft 21 rotate in the R1 direction, the R2 direction, and the R3 direction, respectively. . The electric motor 2 can also be rotated in the opposite direction.

The alternate torque of the rotary actuator 14 is demonstrated.

The rotary actuator 14 can generate the torsional torque T1 to the test shaft 11, as shown in FIG. By alternately changing the direction of this torsional torque T1 alternately, alternating torque can be generated as shown in the graph of A of FIG. In addition, in the graph of A, the horizontal axis is the elapsed time, and the vertical axis is the torque value of the torsional torque T1.

The torsional torque T1 by the rotary actuator 14 is loaded on the specimen 17 mounted on the specimen mounting portion 18, and the reaction force is applied to the drive shaft 1 and the outer shaft 21. T2) and torsional torque T3. Therefore, when the rotary actuator 14 is generating alternating torque as torsional torque T1 as shown in the graph of A of FIG. 5 to the test shaft 11, B of FIG. As shown in the graph of the torsional torque, the torsional torque obtained by combining the free torque t2 and the torsional torque T2 is applied. Moreover, the torsional torque which synthesize | combined the free torque t1 and the torsional torque T3 is applied to the outer shaft 21 as shown in the graph of FIG. In the graphs B and C, the horizontal axis represents elapsed time, and the vertical axis represents torque values of torsional torques T2 and T3. In addition, the pre-torques t1 and t2 are set so that the rotary actuator 14 does not always become 0, even as shown in the graphs of B and C of FIG. 5, even when the torsional torque T1 is loaded onto the specimen 17. It is. That is, the magnitude (absolute value) of the pretorque t1 is larger than the magnitude (absolute value) of the torsion torque T3, and the magnitude (absolute value) of the pretorque t2 is the magnitude (absolute value) of the torsion torque T2. Value).

Thus, since the pre-torque t1, t2 is set so that it may not always become 0 even if the rotary actuator 14 loads the torsional torque T1 to the specimen 17, the meshing of the gear mechanism is carried out in FIG. The state shown by K1-K4 can always be maintained and backlash can be prevented reliably.

Example 2

Next, the 2nd Example of the torque load test apparatus in this invention is demonstrated. 6 is an example of a schematic conceptual diagram of a second embodiment of a torque load test apparatus according to the present invention. In addition, in description of this 2nd Example, the component corresponding to the component of the said 1st Example is attached | subjected with the same code | symbol, and the detailed description is abbreviate | omitted.

Although one test shaft 11 was disposed between the drive shaft 1 and the outer shaft 21 in the first embodiment, two test shafts 11 were disposed in the second embodiment. Adjacent test first gear 12 and test second gear 13 are engaged with each other. The other configuration or operation of the second embodiment is almost the same as that of the first embodiment.

In this way, a plurality of test shafts 11 are formed in the torque load test apparatus, and the specimens 17 can be attached to the test shafts 11. Therefore, in one torque load test apparatus, the test which loads arbitrary alternating torque to the some specimen 17 can be performed. In addition, the alternating torque draws a smooth curve as shown in the graphs of A1 and A2 of FIG. 5, and the waveform of the torque is not deformed.

Example 3

Next, the 3rd Example of the torque load test apparatus in this invention is demonstrated. 7 is an example of the schematic conceptual diagram of 3rd Example of the torque load test apparatus in this invention. In addition, in description of this 3rd Example, the component corresponding to the component of the said 1st Example is attached | subjected with the same code | symbol, and the detailed description is abbreviate | omitted.

In the first embodiment, there is provided a rotary actuator 14 as a torque load device for a specimen which loads a load torque on the specimen 17, and a pre-torque setting device 24 for setting pre-torque in the gear mechanism. In the third embodiment, instead of the rotary actuator 14 and the free torque setting device 24 of the first embodiment, the rotary actuator 51 is formed on the outer shaft 21. And this rotary actuator 51 has the functions of both the torque load device for a specimen which loads a load torque to the specimen 17, and the apparatus of the pre-torque setting apparatus which sets a pre torque to a gear mechanism. That is, the rotary actuator 51 is operated in a state where the specimen 17 is not attached, and the outer shaft second gear 23 is differential with respect to the outer shaft first gear 22, so that the gear mechanism has a pretorque ( After setting t1 and t2, the specimen 17 is mounted and the torsion torque T1 which is a load torque is loaded on the specimen 17 by the rotary actuator 51. Then, as shown in FIG.

As mentioned above, although the Example of this invention was described in detail, this invention is not limited to an Example, A various change can be made within the range of the summary of this invention described in the claim. Modifications of the present invention are illustrated below.

(1) An intermediate gear may be interposed between the gear of the drive shaft and the gear of the test shaft, or between the gear of the test shaft and the gear of the outer shaft. For example, it is also possible to mesh the gear of a test shaft with the gear of a drive shaft through an intermediate gear. It goes without saying that it is also possible to engage directly without interposing the intermediate gear (a motor having a low rotational speed and a large low-speed torque is employed).

(2) If the pretorque setting device can set the pretorque by rotating the outer shaft first gear 22 with respect to the outer shaft second gear 23, the structure, form, and the like can be appropriately changed. For example, a hydraulic rotary actuator 24 is also possible.

(3) Although the pre-torque setting device is formed in the outer side shaft 21 in the Example, it is also possible to form in the drive shaft 1. In this case, the drive shaft 1st gear 6 is rotated with respect to the drive shaft 2nd gear 7, and a free torque is set.

(4) The case flange 32 and the input shaft flange 34 are fixed by spline coupling with the coupling 36, but may be fixed by other means, for example, by bolts or the like. However, fixing by spline coupling is difficult to shift and fine angle setting is possible.

(5) The torque load device for the specimen is constituted by a rotary actuator 14. If the torque can be loaded onto the specimen 17, its structure and type can be appropriately changed.

(6) In the embodiment, although the alternating torque is loaded while the specimen is being rotated, the torque to be loaded on the specimen does not necessarily need to be the alternating torque, but only the torque in the constant direction.

(7) Although the test shaft 11 arrange | positioned between the drive shaft 1 and the outer shaft 21 is one or two in an Example, three or more may be sufficient.

(8) Although the rotary actuator 14 and the pre-torque setting device 24 are arrange | positioned outside the gear of both sides, it is also possible to arrange | position between the gear of both sides.

(9) The rotation drive device 2 may be formed on any of the drive shaft 1, the test shaft 11, and the outer shaft 21.

(10) The torque load device 14 for the specimen may be formed on any of the drive shaft 1, the test shaft 11, and the outer shaft 21.

(11) The invention of the present application is a technique of eliminating rattling, and the effects of backlash of the gear mechanism can be eliminated by bringing the teeth of the meshing gears into close contact with each other. That is, since the impact at the time of rotation start of the rotation drive device 2 is eliminated, the durability of the gear mechanism is improved.

(12) Torque may be loaded on the specimen 17 without rotating the drive shaft 1, the test shaft 11, and the outer shaft 21. FIG.

In addition to the test shaft on which the specimen is mounted and the drive shaft for rotationally driving the test shaft, an outer shaft arranged in a closed loop is formed in the drive shaft and the gear mechanism, and a pretorque setting device is formed on at least one of the outer shaft or the drive shaft, Pre-torque is set by this pre-torque setting device, and the influence of the backlash of the gear mechanism of a closed loop is eliminated. Therefore, even when an alternating torque is applied to the specimen, the gear of the gear mechanism can be prevented from backlashing as much as possible, the waveform of the torque can be smoothly changed, and the durability of the gear can be improved. Therefore, it is optimal to apply to the torque load test apparatus etc. which can apply a load torque to this specimen.

Claims (7)

In the torque load test apparatus that can apply a load torque to the specimen, A drive shaft driven by a rotation drive device and provided with a drive shaft first gear and a drive shaft second gear; A test shaft first gear meshing with the drive shaft first gear, a test shaft second gear meshing with the drive shaft second gear, a specimen mounting portion on which the specimen is detachably mounted, and a load torque applied to the specimen mounted on the specimen mounting portion. A test shaft having a torque load device for a specimen; The outer shaft first gear meshed with the test shaft first gear, the outer shaft second gear meshed with the test shaft second gear, and the outer shaft second gear are rotated relative to the outer shaft first gear to free torque. an outer shaft having a pre-torque setting device for setting (pre-torque), The shaft center of the drive shaft first gear, the test shaft first gear, the outer shaft first gear, the outer shaft, the outer shaft second gear, the test shaft second gear, the drive shaft second gear and the drive shaft are arranged in a closed loop shape. Torque load test device, characterized in that. In the torque load test apparatus that can apply a load torque to the specimen, It is provided with the drive shaft 1st gear, the drive shaft 2nd gear, and the pre-torque setting apparatus which sets the pre-torque by rotating this drive shaft 2nd gear relatively with respect to the drive shaft 1st gear, while being rotated by the drive device for rotation. With drive shaft to do, A test shaft first gear meshing with the drive shaft first gear, a test shaft second gear meshing with the drive shaft second gear, a specimen mounting portion on which the specimen is detachably mounted, and a load torque applied to the specimen mounted on the specimen mounting portion. A test shaft having a torque load device for a specimen; An outer shaft having an outer shaft first gear that meshes with the test shaft first gear, and an outer shaft second gear that meshes with the test shaft second gear, The shaft center of the drive shaft first gear, the test shaft first gear, the outer shaft first gear, the outer shaft, the outer shaft second gear, the test shaft second gear, the drive shaft second gear and the drive shaft are arranged in a closed loop shape. Torque load test device, characterized in that. The method according to claim 1 or 2, In the pre-torque setting device, the outer shaft first gear or the drive shaft first gear is rotated relative to the outer shaft second gear or the drive shaft second gear, and the teeth of the meshing gears of the gear mechanism of the closed loop are removed. A close-up, torque load test apparatus characterized by removing the influence of the backlash of the gear mechanism of the closed loop. The method according to claim 1 or 2, Two or more test shafts are arrange | positioned between the said drive shaft and an outer shaft, and the test shaft 1st gears and the test shaft 2nd gears are mutually meshed with each other in the adjacent test shaft. The method according to claim 1 or 2, And said pre-torque setting device is constituted by a differential reducer rotatable by the case itself. The method according to claim 1 or 2, The torque load testing device according to claim 1, wherein the torque load device for the specimen generates alternating torque in which the direction of torque is alternately changed. In the torque load test apparatus that can apply a load torque to the specimen, A drive shaft including a drive shaft first gear and a drive shaft second gear; A test shaft including a test shaft first gear that meshes with the drive shaft first gear, a test shaft second gear that meshes with the drive shaft second gear, and a test specimen mounting portion on which the test specimen is detachably mounted; An outer shaft having an outer shaft first gear meshing with the test shaft first gear and an outer shaft second gear meshing with the test shaft second gear; A rotation drive device for rotating the drive shaft, the test shaft, and the outer shaft; A torque load device for a specimen that applies a load torque to the specimen mounted on the specimen mounting portion is disposed on any one of the drive shaft, the test shaft, and the outer shaft; The shaft center of the drive shaft first gear, the test shaft first gear, the outer shaft first gear, the outer shaft, the outer shaft second gear, the test shaft second gear, the drive shaft second gear and the drive shaft are arranged in a closed loop shape, Torque load testing device, characterized in that the meshed teeth of the gear mechanism on the closed loop are in close contact with each other to remove the influence of the backlash of the gear mechanism of the closed loop.