JP5100792B2 - Power circulation test equipment - Google Patents

Description

  The present invention relates to a power circulation type testing apparatus for testing the strength, durability and the like of a power transmission member such as a gear, an endless belt, and a chain.

  As a testing machine for performing a durability performance test on a power transmission member (such as a gear), a power circulation type testing apparatus has been proposed (see Patent Documents 1 and 2). The power circulation type test apparatus constitutes a closed loop, installs a test piece in the closed loop, and circulates driving force in the closed loop to perform continuous operation. Therefore, in the power circulation type test apparatus, the test machine can be continuously operated by adding the driving force corresponding to the loss in the closed loop, and the energy consumption can be suppressed.

  By the way, when such a power circulation type testing apparatus is used, a mechanism for applying torque to the closed loop is required. Conventionally, torque is applied using a spring such as a torsion spring or a hydraulic cylinder. However, when torque is loaded by a spring such as a torsion spring, it is difficult to change the torque during continuous operation.

  Further, when testing a specimen that may cause a slip in a closed loop, such as a CVT belt that is a continuously variable transmission mechanism, a problem arises that torque slip occurs due to the slip. When a torque is applied using a hydraulic cylinder, the torque can be changed during operation, and a slip to a certain extent can be followed. However, when reaching the stroke end of the hydraulic cylinder, no more torsional force can be output, so that there is a problem that torque loss occurs due to slipping of the specimen as described above.

JP-A-7-260628 JP-A-8-145853

  The present invention has been made in consideration of the above-described facts, and is a power circulation type test apparatus capable of changing torque during operation and preventing torque loss and stably loading torque. It is an issue to provide.

In order to solve the above-mentioned problems, a power circulation type test apparatus according to claim 1 of the present invention comprises a closed power circulation path configured by connecting a plurality of rotating shafts so that a driving force circulates, and the closure power circuit. A driving machine that supplies a driving force to the rotating shaft of the power circuit, and a rotating device that is connected to the rotating shaft of the closed power circuit and that rotates together with the rotating shaft by the driving force supplied to the rotating shaft by the driving machine. the endless circulation rotatable rotary actuator load torque on the rotary shaft, and the rotation difference absorbing mechanism provides rotational absorbed by the driving force energy to the rotary actuator of the rotary shaft, provided in the closed power circulation path And a specimen attachment portion for attaching a specimen to be tested.

  In the power circulation type test apparatus according to the present invention, a plurality of rotating shafts are connected so that the driving force circulates in the closed power circuit, and the test object is attached to the specimen mounting portion provided in the closed power circuit. A test specimen is attached. The driving force supplied to the rotating shaft by the drive machine circulates in the closed power circuit. Therefore, since it is only necessary to add the driving force lost in the closed circuit for continuous operation, the power circulation type test apparatus of the present invention consumes energy compared to a non-circulation type tester. Can be suppressed.

  Further, in the power circulation type testing apparatus according to the present invention, torque is applied to the rotating shaft by a rotary actuator capable of infinite circulation rotation. As the rotary actuator, a hydraulic motor, an electric motor, and other rotary actuators capable of infinite circulation rotation can be used. The rotary actuator is connected to the rotating shaft and applies torque to the rotating shaft. The torque is applied by causing the rotary actuator to apply a torsional force to the rotating shaft. Thus, by using the rotary actuator, the load torque to the closed power circuit can be changed during continuous operation by controlling the rotational torque of the rotary actuator.

  In addition, since a rotation difference absorption mechanism that absorbs the rotation of the rotation shaft and supplies driving force energy to the rotary actuator is provided, the drive portion of the rotary actuator can be driven while rotating the rotary actuator itself together with the rotation shaft. it can.

  In addition, the rotary actuator of the present invention is capable of infinite circulation rotation, so there is no torsion end, it can follow the slip of the specimen by infinite circulation rotation, prevent torque loss, and be stable in a closed power circuit. Torque can be applied.

A power circulation type testing apparatus according to a second aspect of the present invention includes a reduction mechanism that amplifies torque transmitted from the rotary actuator and transmits the torque to the rotary shaft between the rotary actuator and the rotary shaft. It is characterized by this.

Thus, by using the speed reduction mechanism, the torque output from the rotary actuator can be amplified and transmitted to the rotating shaft. Therefore, since the torque of the rotary actuator itself may be smaller than the torque required for the testing machine, it is possible to reduce the size of the rotary actuator.
[0014]
The power circulation type test apparatus according to claim 3 of the present invention is configured such that the closed power circulation path includes a pair of rotating shafts arranged in parallel with each other and connected via a speed change mechanism, and the rotary actuator includes It arrange | positions at the low speed rotating shaft of a pair of rotating shafts, It is characterized by the above-mentioned.
[0015]
As described above, by arranging the rotary actuator on the low-speed rotation shaft, the rotation speed of the rotary actuator itself also becomes a low speed corresponding to the low-speed rotation shaft. Therefore, it is possible to reduce the load on the rotary actuator and members such as couplings and slip rings connected to the rotary actuator.

A power circulation type test apparatus according to claim 4 of the present invention comprises a double cylinder that is configured at the shaft end of the rotating shaft and that forms part of the closed power circulation path and is connected in series with each other. The specimen mounting portion is arranged in a drive system between the inner shaft and the outer tube of the double cylinder.

  In this way, the shaft end of the rotating shaft has a double cylinder structure, and by configuring the specimen mounting portion for mounting the specimen on the drive system between the inner shaft and the outer cylinder of the double cylinder, Compared with the case where the specimen mounting portion is arranged in the center, the specimen can be easily attached and detached and exchanged.

In the power circulation type testing apparatus according to claim 5 of the present invention, the specimen mounting portion is provided with a specimen mounting shaft on which the specimen is mounted while being opposed to the double cylinder, The inter-axis distance between the double cylinders is variable.

In this way, by making the interaxial distance between the specimen attachment shaft and the double cylinder in the specimen attachment portion variable, the interaxial distance can be easily adjusted according to the specimen.

According to a sixth aspect of the present invention, there is provided a power circulation type test apparatus that detects a torque in the closed power circulation path, and outputs an output torque of the rotary actuator based on the torque detected by the torque detector. Torque control means for controlling.

In this way, the torque detector detects the torque in the closed power circuit, and the torque control means controls the output torque of the rotary actuator based on the detected torque, thereby stabilizing the desired torque in the closed power circuit. And can be loaded.
The output torque of the rotary actuator can be controlled by controlling the rotational speed of the rotary actuator and controlling the torque of the rotary actuator itself.

The power circulation type testing apparatus according to claim 7 of the present invention is characterized in that the rotary actuator is a hydraulic rotary actuator.

Thus, by using a hydraulic rotary actuator as the rotary actuator, a high torque can be easily output as compared with an electric type. In addition, the rotary actuator that rotates with the rotating shaft is supplied with a fluid as a power source via a rotary coupling as a rotation difference absorbing mechanism. Can be eliminated.

  As described above, according to the power circulation type testing apparatus of the present invention, it is possible to change the torque during operation, and to suppress torque loss and to load the torque stably.

It is the schematic which shows the whole structure of the power type test device which concerns on this embodiment. It is an expanded sectional view near the specimen attachment part of the power type testing device concerning this embodiment. It is an expanded sectional view near the 1st transmission unit of the power type test device concerning this embodiment. It is an expanded sectional view of the rotary coupling of the power type test device concerning this embodiment.

  Next, details of the power circulation type testing apparatus according to the present invention will be described with reference to the drawings.

(overall structure)
FIG. 1 shows an outline of the overall configuration of a power circulation type test apparatus 10 according to the present invention. The power circulation type test apparatus 10 includes a machine base 11 and a pair of rotating shafts (one side is a “low-speed rotating shaft 22” and the other side is a “high-speed rotating shaft 24”), a first transmission unit 26, and a second transmission. A unit 28, a driving machine 30, and a specimen mounting portion 60 are provided.

  The power circulation type testing apparatus 10 includes a low-speed rotating shaft 22 and a high-speed rotating shaft 24 that are connected via a first transmission unit 26, a second transmission unit 28, and a specimen mounting portion 60, thereby providing a closed loop closing power. A circulation path 12 is configured. The driving force supplied from the driving machine 30 circulates in the closed power circuit 12. By circulating the driving force in this way, energy consumption can be suppressed as compared with the case of using a non-circulating type testing machine.

  The low-speed rotation shaft 22 and the high-speed rotation shaft 24 are arranged so as to be parallel to each other, and are connected to each other by a first transmission unit 26 and a second transmission unit 28. An output shaft 30 </ b> A of the driving machine 30 is connected to the pulley 23 of the low speed rotating shaft 22 via a driving belt 31, and driving force from the driving machine 30 is supplied to the low speed rotating shaft 22. The low-speed rotation shaft 22 includes a first low-speed rotation unit 22A on the first transmission unit 26 side and a second low-speed rotation unit 22B on the second transmission unit 28 side. 22 A of 1st low speed rotation parts and 22B of 2nd low speed rotation parts are arrange | positioned coaxially, and are mutually rotatable.

  In the present embodiment, the output shaft 30A of the drive machine 30 is connected to the first low-speed rotation part 22A of the low-speed rotation shaft 22 via the drive belt 31, but the drive machine 30 is connected to the shaft of the low-speed rotation shaft 22. The output shaft 30 </ b> A of the driving machine 30 can be directly connected to the low-speed rotation shaft 22 by being coaxially arranged at the end.

  The shaft end portion of the high-speed rotation shaft 24 on the second transmission unit 28 side is a double cylinder structure 25, and is configured by arranging an outer cylinder 25A on the outer periphery of the inner shaft 25B. A specimen mounting portion 60 is provided at the distal end portion of the double cylinder structure portion 25. Details of the specimen mounting portion 60 will be described later.

  As shown also in FIG. 3, the first transmission unit 26 includes a gear 26A and a gear 26B. The gear 26A is fixed to the first low speed portion 22A, and the gear 26B is fixed to the high speed rotating shaft 24. The gear 26A and the gear 26B are meshed with each other, and the low-speed rotary shaft 22 is transmitted so that the rotation of the low-speed rotary shaft 22 is increased by the gear ratio (speed ratio) of the gears 26A and 26B and transmitted to the high-speed rotary shaft 24. And the high-speed rotation shaft 24 are connected. The first low speed portion 22A is supported on the machine base 11 by the bearing 21 in the vicinity of the gear 26A, and the high speed rotating shaft 24 is supported on the machine base 11 by the bearing 23 in the vicinity of the gear 26B.

  As shown in FIG. 1, the second transmission unit 28 includes a gear 28A and a gear 28B. The gear 28 </ b> A is fixed to the second low speed portion 22 </ b> B, and the gear 28 </ b> B is fixed to the outer cylinder 25 </ b> A of the double cylinder structure portion 25 of the high speed rotating shaft 24. The gear 28 </ b> A and the gear 28 </ b> B are meshed with each other, and the second low speed portion 22 </ b> B is rotated at the same speed ratio as that of the first transmission unit 26 and transmitted to the high speed rotation shaft 24. The part 22B and the high-speed rotation shaft 24 are connected.

  The high-speed rotation shaft 24 includes a double cylinder structure 25 on the second transmission unit 28 side on the tip side (right side) of the high-speed main body shaft 24A that integrally extends from the first transmission unit 26 side. As shown in FIG. 2, the high-speed main body shaft 24 </ b> A is integrally formed with the inner shaft 25 </ b> B of the double cylinder structure portion 25, and is supported on the machine base 11 by a bearing 27 in the vicinity of the gear 28 </ b> B. The high-speed main body shaft 24A and the inner shaft 25B rotate integrally. A gear 28B is fixed to the outer cylinder 25A, and the outer cylinder 25A is supported on the machine base 11 by a bearing 29 in the vicinity of the gear 28B. The inner shaft 25B is inserted into the cylinder of the outer cylinder 25A, and the tip projects from the end of the outer cylinder 25A. A gap is formed between the inner peripheral surface of the outer cylinder 25A and the outer peripheral surface of the inner shaft 25B. Plate bearings 25C are disposed at both ends of the gap, and the inner shaft 25B is supported in the outer cylinder 25A. The outer cylinder 25A and the inner shaft 25B are configured to be rotatable relative to each other.

  As shown in FIG. 3, a rotary actuator 40 is disposed inside the first low-speed rotating portion 22 </ b> A of the low-speed rotating shaft 22. The rotary actuator 40 is configured by using a hydraulic motor and applies a torque to the closed power circuit 12. The output torque is controlled by a hydraulic servo valve 42 installed on the machine base 11 shown in FIG. Has been. The rotary actuator 40 is connected to the second low-speed rotating part 22 </ b> B via the speed reduction mechanism 50 and constitutes a part of the closed circuit 12. Details of the rotary actuator 40 and the speed reduction mechanism 50 will be described later.

  As shown in FIG. 1, the torque detector 14 is attached between the first transmission unit 26 and the second transmission unit 28 of the high-speed rotation shaft 24. The torque detector 14 detects the torque of the high-speed rotating shaft 24 portion in the closed power circuit 12. The torque detector 14 is connected to the controller 16 and outputs a torque signal regarding the detected torque to the controller 16.

  The controller 16 includes a CPU, a ROM, a RAM, and the like. To the hydraulic servo valve 42, a load torque set by the user is output from the rotary actuator 40 based on the input torque signal. Output a control signal. The hydraulic servo valve 42 is installed on the machine base 11 and is connected to the rotary actuator 40 via the rotary coupling 44. The hydraulic servo valve 42 controls the hydraulic pressure of the fluid supplied to the rotary actuator 40 by PWM control based on the input control signal, and controls the output torque of the rotary actuator 40.

  The controller 16 includes a memory 16M that stores various information such as a load torque value and a load torque time-series profile. The controller 16 is connected to an input unit 18 to which various information such as a load torque value and a time series profile of the load torque value are input.

(Rotary actuator configuration)
In the present embodiment, the rotary actuator 40 is constituted by a hydraulic motor, and has a motor main body 40A and a motor rotating shaft 40S as an output unit, as shown in FIG. The rotary actuator 40 is disposed in the first low-speed rotation unit 22A, and is installed so that the motor rotation shaft 40S is coaxial with the axis S of the first low-speed rotation unit 22A. The first low-speed rotating portion 22A is rotatably supported by a bearing 21 on a housing 20 installed on the machine base 11. The motor body 40A of the rotary actuator 40 is fixed in the first low-speed rotation shaft 22A and is configured to rotate together with the first low-speed rotation shaft 22A.

  A rotary coupling 44 as a rotation difference absorbing mechanism is attached to the rotary actuator 40 on the shaft end side to which the first low speed rotating portion 22A is attached. The rotary coupling 44 is connected to the hydraulic servo valve 42. Fluid from the hydraulic servo valve 42 is supplied to the rotary actuator 40 via the rotary coupling 44. Details of the rotary coupling 44 will be described later.

  The motor rotation shaft 40S of the rotary actuator 40 is capable of infinite circulation rotation. A connecting shaft 46 is attached to the motor rotating shaft 40S. The connecting shaft 46 is integrally fixed to the motor rotating shaft 40S, is provided coaxially with the motor rotating shaft 40S, and is disposed apart from the inner wall of the first low speed rotating portion 22A. A speed reduction mechanism 50 is connected to the tip of the connection shaft 46. Thereby, the first low-speed rotation unit 22A is connected to the second low-speed rotation unit 22B via the speed reduction mechanism 50.

  In the present embodiment, the rotary actuator 40 is disposed within the shaft of the low-speed rotation shaft 22 (first low-speed rotation portion 22A), but the rotary actuator 40 is disposed outside (outside) the low-speed rotation shaft 22. May be.

(Configuration of deceleration mechanism)
Next, the speed reduction mechanism 50 will be described. As the speed reduction mechanism 50, various power speed reduction mechanisms (harmonic drive speed reduction mechanism, ball speed reduction mechanism, cycloid speed reduction mechanism, etc.) can be used. Here, an example using a planetary gear speed reduction mechanism will be described.

  The speed reduction mechanism 50 includes a sun gear 51, a planetary gear 52, and an internal gear 54. The sun gear 51 is fixed to the connecting shaft 46. The internal gear 54 is formed integrally with the first low-speed rotating portion 22A, and is disposed on the radially outer side of the sun gear 51 coaxially with the motor rotating shaft 40S. The planetary gear 52 is disposed between the sun gear 51 and the internal gear 54. The planetary gear 52 meshes with the internal gear 54 and the sun gear 51. The rotation shaft 52S of the planetary gear 52 is pivotally supported by the second low-speed rotation unit 22B. The driving force from the rotary actuator 40 is transmitted to the second low speed rotating unit 22B via the connecting shaft 46, the sun gear 51, and the planetary gear 52. The driving force is greatly reduced in rotational speed and torque is greatly amplified and transmitted.

  During the test operation, the motor rotation shaft 40S of the rotary actuator 40 does not rotate relative to the first low-speed rotation unit 22A and is stopped with respect to the first low-speed rotation unit 22A, that is, the first Torque is applied while rotating together with the low speed rotating unit 22A.

(Structure of hydraulic coupling)
A fluid is supplied to the rotary actuator 40 that rotates together with the low-speed rotation shaft 22 via a rotary coupling 44 as a rotation difference absorbing mechanism. As shown in FIG. 4, the rotary coupling 44 has a rotating portion 72 and a fixed portion 74.

  The rotating part 72 is arranged to face the first low-speed rotating part 22A and is fixed to the first low-speed rotating part 22A, and extends in a direction away from the first low-speed part 22A from the rotor part 72A. It has a supported portion 72B. The rotor portion 72A and the supported portion 72B are integrally formed and rotate together with the first low speed rotating portion 22A. The rotating part 72 includes a first rotating flow path 73A along an extended portion of the axial center of the first low speed rotating part 22A, and a cylindrical second rotating flow configured radially outside the first rotating flow path 73A. The path 73 </ b> B is configured to penetrate the rotating unit 72. The first rotary flow path 73A is in communication with the first flow path 22E of the rotary actuator 40, and the second rotary flow path 73B is in communication with the second flow path 22F of the rotary actuator 40. One of the first flow path 22E and the second flow path 22F is supplied to a rotor (not shown) provided in the rotary actuator 40, and the rotor is rotated by the hydraulic pressure of the fluid to rotate the motor. A rotational driving force is output to the shaft 40S. The fluid after rotating the rotor is discharged from the other of the first flow path 22E and the second flow path 22F.

  The fixed part 74 has a support part 74A and a supply flow path part 74B. The support portion 74A is disposed on the radially outer side of the supported portion 72B, and supports the rotating portion 72 via the bearing 71 so as to be rotatable. The supply flow path part 74B is disposed on the side far from the first low speed rotation part 22A, and is connected to the first supply flow path 75A communicated with the first rotation flow path 73A and the second rotation flow path 73B. Two supply passages 75B are configured. The first supply channel 75 </ b> A and the second supply channel 75 </ b> B penetrate the fixing portion 74 in the radial direction and are connected to the hydraulic valve 42.

  Seal portions 76 </ b> A and 76 </ b> B are provided at a boundary portion between the rotating portion 72 and the fixed portion 74. The seal portions 76A and 76B seal the rotation portion 72 and the fixed portion 74 so that they can rotate relative to each other.

(Configuration of specimen mounting part)
Next, the structure of the specimen attachment part 60 shown in FIG. 2 is demonstrated. The specimen mounting portion 60 includes a plate substrate 62, a movable support portion 64, and a shaft member 66. The shaft member 66 is disposed so that the shaft center V is parallel to the shaft center T of the high-speed rotation shaft 24 and the shaft center S of the low-speed rotation shaft 22, and can freely rotate on the movable support portion 64 by the bearing 65. So that it is supported. On the plate substrate 62, a ball screw 62A and a guide shaft 62B are provided. The ball screw 62 </ b> A and the guide shaft 62 </ b> B parallel to the ball screw 62 </ b> A are arranged along a direction orthogonal to the axial direction of the shaft member 66. The movable support portion 64 is engaged with the ball screw 62A and the guide shaft 62B, and is movable along the guide shaft 62B.

  The plate substrate 62 is attached to the machine base 11 via bolts B1 to B4, and can be attached to the machine base 11 at a position rotated in the direction of the arrow R with respect to B1. Thereby, normally, the shaft member 66 disposed in parallel to the axis T of the inner shaft 25B (and the outer cylinder 25A) is tilted with respect to the axis T, and the rotation shafts of the specimens 61A and 61B are biased. It is also possible to make it into a corner state.

  A specimen mounting shaft 63 is attached to the end of the shaft member 66. The specimen mounting shaft 63 is disposed so as to face and be parallel to the outer cylinder 25A and the inner shaft 25B of the double cylinder structure portion 25. The specimen attachment shaft 63 is attached to the shaft member 66 so as to rotate integrally with the shaft member 66. Two specimens 61A and 61B can be coaxially attached to the specimen mounting shaft 63 in the axial direction. In this embodiment, the specimens 61 </ b> A and 61 </ b> B have the same dimensions as each other, and are fixed to the specimen mounting shaft 63 so as to rotate integrally with the specimen mounting shaft 63. In the present embodiment, the specimens 61A and 61B are constituted by gears.

  The inner shaft 25B of the double cylinder structure 25 has a tip protruding from the outer cylinder 25A, and a gear 27B is coaxially fixed to the outer periphery of the protruding inner shaft 25B. The gear 27B meshes with one specimen 61B. A gear 27A having the same dimensions as the gear 27B is fixed to the outer periphery of the distal end of the outer cylinder 25A of the double cylinder structure 25. In this embodiment, the gears 27A and 27B have the same dimensions. The gear 27A meshes with the other specimen 61A. As a result, the driving force is sequentially transmitted to the outer cylinder 25A, the gear 27A, the specimen 61A, the specimen mounting shaft 63, the specimen 61B, the gear 27B, and the inner shaft 25B. 12 is configured to be interposed in series.

  In this embodiment, the gears 27A and 27B and the specimens 61A and 61B are described as gears. Instead of these gears, pulleys and sprockets are attached to the outer cylinder 25A and the inner shaft 25B. By attaching a pulley or a sprocket to the specimen mounting shaft 63, a CVT (continuously variable transmission) belt or a chain can be used as the specimen. Further, the gears 27A and 27B and the gears of the specimens 61A and 61B can be set to arbitrary sizes constituting the closed power circuit 12.

(Function)
Next, the operation of the power circulation type test apparatus 10 of this embodiment will be described.
During the test operation, the rotary actuator 40 is driven with the fluid supplied from the hydraulic servo valve 42 as a driving source while rotating together with the first low speed rotating unit 22A, and the driving force is connected to the connecting shaft 46, the sun gear 51, the planetary gear. It is transmitted to the gear 52. Then, the torque is amplified by the planetary gear 52 and transmitted to the second low speed rotating portion 22B. As a result, the first low-speed rotation unit 22A and the second low-speed rotation unit 22B rotate relative to each other in the opposite direction, and a test load torque is applied to the closed power circulation path 12. The rotational force of the rotary actuator 40 is greatly decelerated and greatly increased through the planetary gear 52, so that fine adjustment of the applied load torque is easy.

  During the test operation, the driving force from the driving machine 30 is input to the second low-speed rotating unit 22B via the driving belt 31. The driving force input to the second low speed rotating portion 22B is increased in speed by the second transmission unit 28 and transmitted to the outer cylinder 25A. The driving force transmitted to the outer cylinder 25A is transmitted to the specimen 61A via the gear 27A, and is transmitted to the specimen 61B via the specimen mounting shaft 63. The driving force transmitted to the specimen 61B is transmitted to the inner shaft 25B and the high-speed main body shaft 24A via the gear 27B. The driving force transmitted to the high-speed main body shaft 24A is decelerated by the first transmission unit 26 and transmitted to the first low-speed rotating portion 22A, and the driving force is circulated in the closed power circulation path 12. The driving machine 30 is continuously operated so as to add a driving force corresponding to the loss in the closed power circuit 12.

  The load torque in the closed power circuit 12 is detected by the torque detector 14, and a torque signal corresponding to the detected torque is sent to the controller 16. The controller 16 compares the input torque signal with the set load torque. If there is a difference between the set load torque and the detected load torque, the controller 16 sends a control signal corresponding to the difference to the hydraulic servo valve 42, Perform feedback control. Based on the input control signal, the hydraulic servo valve 42 sends the corresponding hydraulic pressure to the rotary actuator 40 via the rotary coupling 44 to adjust the relative rotational force between the first low speed portion 22A and the second low speed portion 22B. To do. This adjustment is repeated until the torque detected by the torque detector 14 reaches a set value. In practice, the hydraulic pressure supplied to the rotary actuator 40 is regulated by PWM control.

  When changing the load torque to the closed power circuit 12 during the continuous operation, the changed load torque value is input from the input unit 18 to the controller 16 to instruct the change. Thereby, the hydraulic servo valve 42 is controlled, and the output torque at the rotary actuator 40 is changed.

  In addition, when changing the load torque with a predetermined time series profile, the time series profile of the load torque is input from the input unit 18 to the controller 16. The time series profile of the input load torque is stored in the memory 16M. The controller 16 controls the hydraulic servo valve 42 based on the information stored in the memory 16M, and changes the output torque at the rotary actuator 40 along the time series profile.

  When the specimen is a continuously variable transmission using a belt and slip occurs in the specimen, the load torque in the closed power circuit 12 is temporarily reduced. Since the predetermined torque is controlled to be applied to the closed power circuit 12, the load torque to the closed power circuit 12 is automatically recovered.

  According to the power circulation type test apparatus 10 of the present embodiment, since the torque is applied to the closed power circuit 12 using the rotary actuator 40, the torque can be easily changed during operation. Therefore, it is possible to carry out a test assuming a pattern operation in which the load torque is changed and a rapid acceleration / deceleration operation.

  Further, since the rotary actuator 40 can rotate infinitely, there is no stroke end as in the case of using a hydraulic cylinder or the like. Therefore, even when using a specimen such as a belt that may cause slipping, the torque decrease can be automatically recovered by following the change accompanying the slip with infinite circulation rotation, preventing torque loss. Thus, torque can be applied to the closed power circuit 12 stably.

  In this embodiment, the rotary actuator 40 is connected to the low-speed rotation shaft 22 via the speed reduction mechanism 50. However, the speed reduction mechanism 50 is not an essential component, and the motor rotation shaft 40S of the rotary actuator 40 is connected via the speed reduction mechanism 50. You may connect with the low-speed rotating shaft 22 without. In particular, in the present embodiment, by providing the speed reduction mechanism 50, the torque of the rotary actuator 40 can be amplified and transmitted to the low-speed rotation shaft 22, so the output torque at the rotary actuator 40 itself is required by the testing machine. It may be smaller than the load. Therefore, the rotary actuator 40 can be reduced in size.

  In this embodiment, the rotary actuator 40 is disposed on the low-speed rotation shaft 22 side and torque is applied to the low-speed rotation shaft 22. However, the rotary actuator 40 may be provided on the high-speed rotation shaft 24 side. In particular, when the rotary actuator 40 is arranged on the low-speed rotation shaft 22 side as in the present embodiment, the rotation speed of the rotary actuator 40 itself can be set to a low speed corresponding to the low-speed rotation shaft 22. Is protected, and the load on the connected rotary coupling 44 can be reduced.

  Moreover, in this embodiment, the double cylinder structure part 25 was provided in the axial end of the high-speed rotating shaft 24, and the specimen attachment part 60 was comprised using this double cylinder structure part 25, However, The said structure is essential structure is not. A configuration may be adopted in which a specimen mounting portion is provided between the first transmission unit 26 and the second transmission unit 28 of the high-speed rotation shaft 24 and the specimen is arranged at this position. When the specimen mounting part 60 is configured by providing the double cylinder structure part 25 at the shaft end as in the present embodiment, the specimen can be easily attached and detached. In addition, by adopting a double cylinder structure, it is possible to achieve a compact structure as compared with the case of using two separate shaft structures.

  Further, in the present embodiment, in the specimen mounting portion 60, a specimen mounting shaft 63 is disposed so as to face the double cylindrical structure 25 portion, and the specimen mounting shaft 63 and the double cylindrical structure 25 portion are arranged. Since the distance is variable, the test condition can be changed or the test for different specimens can be easily performed by changing the inter-axis distance according to the specimen.

  Further, in the present embodiment, since the plate substrate 62 can be rotated in the surface direction (arrow R direction) with respect to the machine base 11 in the specimen mounting portion 60, the rotation axis of the specimen is intentionally declinated. As a state, a test such as misalignment can be performed.

  In the present embodiment, the example in which the specimen is mounted on the specimen mounting shaft 63 disposed so as to face the double cylinder structure 25 and the gear is tested is described. However, a unit such as a transmission assembly is provided. When a specimen is used, the test can be performed by connecting the unit to the double cylinder structure 25 without using the specimen mounting shaft 63. For example, when connecting the transmission assembly, the input end of the transmission assembly may be connected to the outer cylinder 25A, and the output end of the transmission assembly may be connected to the inner shaft 25B via a transmission that returns the rotational speed.

  In the present embodiment, the torque detector 14 is installed, a torque signal is output to the controller 16, and the load torque in the closed power circuit 12 is feedback controlled. However, the feedback control is not essential. When the load torque is controlled as in this embodiment, it is possible to accurately load the torque during continuous operation.

  Further, in the present embodiment, the torque detector 14 is arranged at the intermediate portion of the high speed rotating shaft 24, but the torque detector 14 can also be arranged at the shaft end of the high speed rotating shaft 24 or the low speed rotating shaft 22. In this case, it is possible to attach the torque detector 14 by adding the double cylinder structure adopted in the specimen mounting portion 60 to the other shaft end. Thus, by installing the torque detector 14 at the shaft end, the torque detector can be easily attached and detached, and the maintainability can be improved.

  In this embodiment, a hydraulic motor is used as the rotary actuator 40. However, instead of the hydraulic motor, another rotary actuator capable of infinite circulation rotation, for example, an electric motor may be used. In this case, instead of the rotary coupling 44, a power feeding slip ring is used as the rotation difference absorbing mechanism. When a hydraulic motor is used as in this embodiment, high torque can be easily output as compared with an electric motor. In addition, the rotary actuator that rotates with the rotating shaft is supplied with a fluid as a power source via a hydraulic coupling, so that a power supply slip ring is not required as in the case of an electric type, and generation of electromagnetic noise is eliminated. Can do.

DESCRIPTION OF SYMBOLS 10 Power circulation type test device 12 Closed power circuit 14 Torque detector 16 Controller (torque control means)
22 Low speed rotating shaft (a pair of rotating shafts)
24 High-speed rotating shaft (a pair of rotating shafts)
25A outer cylinder 25B inner shaft 25 double cylinder structure (double cylinder)
26 First transmission unit (transmission mechanism)
28 Second transmission unit (transmission mechanism)
30 Driving Machine 40 Rotary Actuator 42 Hydraulic Servo Valve 44 Rotary Coupling (Rotational Difference Absorption Mechanism)
50 Deceleration mechanism 60 Specimen mounting part 61A Specimen 61B Specimen 63 Specimen mounting shaft

Claims (7)

A closed power circuit configured by connecting a plurality of rotating shafts so that the driving force circulates;
A driving machine for supplying a driving force to the rotating shaft of the closed power circuit;
A rotary actuator that is connected to the rotating shaft of the closed power circulation path, rotates together with the rotating shaft by a driving force supplied to the rotating shaft by the drive machine, and is capable of rotating infinitely circulating the torque applied to the rotating shaft. When,
A rotation difference absorbing mechanism that absorbs rotation of the rotating shaft and supplies driving force energy to the rotary actuator;
Specimen mounting part that is provided in the closed power circuit and attaches a specimen to be tested,
Power-circulating test device with   The power circulation system according to claim 1, further comprising a reduction mechanism that amplifies torque output from the rotary actuator and transmits the torque to the rotary shaft between the rotary actuator and the rotary shaft. Test equipment. The closed power circulation path includes a pair of rotating shafts arranged in parallel to each other and connected via a speed change mechanism,
3. The power circulation type testing apparatus according to claim 1, wherein the rotary actuator is disposed on a low-speed rotation shaft of the pair of rotation shafts. A double cylinder configured at the shaft end of the rotating shaft and forming a part of the closed power circulation path and connected in series with each other, and driving between the inner shaft and the outer cylinder of the double cylinder The power circulation type testing apparatus according to any one of claims 1 to 3, wherein the specimen mounting portion is arranged in a system. The specimen mounting portion includes a specimen mounting shaft on which a specimen is mounted in parallel with the double cylinder,
The specimen mounting shaft has a variable inter-axis distance between the double cylinder,
The power circulation type testing apparatus according to claim 4. A torque detector for detecting torque in the closed power circuit;
Torque control means for controlling the output torque of the rotary actuator based on the torque detected by the torque detector;
The power circulation type testing device according to any one of claims 1 to 5, further comprising: The power circulation type testing device according to any one of claims 1 to 6, wherein the rotary actuator is a hydraulic rotary actuator.

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