JP2017040475A - testing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a testing machine being capable of measuring transmission efficiency equivalent to that in a state of a continuously variable transmission unit being assembled to a CVT unit and having high versatility in the testing machine measuring the transmission efficiency of the continuously variable transmission unit.SOLUTION: A testing machine 1 measures transmission efficiency of a continuously variable transmission unit 20 having input side and output side pulleys 21 and 25 individually attached to an input shaft 22 and an output shaft 26 disposed in parallel and a CVT belt 29. The continuously variable transmission unit 20 has a reduction gear 30 for outputting rotation of the output shaft 26 to an output member 33 being more separated from the input shaft 22 in a radial direction than the output shaft 26. The testing machine 1 comprises: a first torque meter 4 for measuring input torque of the input shaft 22; a second torque meter 5 for measuring output torque of the output member 33; and a strain gage 7 provided between the output side pulley 25 and the reduction gear 30 in the output shaft 26. The testing machine 1 acquires all or a part of transmission efficiency of the continuously variable transmission unit 20 based on torque values measured by the first and second torque meters 4, 5 and a strain value measured by the strain gage 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a testing machine that measures the transmission efficiency of a continuously variable transmission that constitutes a CVT unit.

  In a CVT (Continuously Variable Transmission) unit (continuously variable transmission), an input side pulley attached to an input shaft, an output side pulley attached to an output shaft, and a CVT belt wound around these pulleys are configured. It is essential to reduce the loss in the continuously variable transmission. For this reason, in the CVT unit, it is important to grasp the transmission efficiency of the continuously variable transmission. Therefore, conventionally, the performance of the continuously variable transmission portion constituting the CVT unit has been evaluated using a dedicated testing machine.

  As such a testing machine, a torque meter provided between the drive motor connected to the input shaft and the input side pulley, and an absorption motor connected to the output shaft and the output side pulley were provided. There is known a torque meter that evaluates the performance of a continuously variable transmission based on torque values measured by both torque meters while controlling a drive motor and an absorption motor.

  For example, in Patent Document 1, an input shaft and an output are set according to the drive state of a drive motor or the like so that a test result equivalent to the state assembled in the CVT unit can be obtained in the state set in the test machine. It is disclosed that a bearing installed on a shaft is moved in a radial direction. According to the testing machine of this patent document 1, by moving the bearing in the radial direction, the parallelism error in which the direction of the input shaft and the direction of the output shaft are shifted in the same plane, the input shaft and the output shaft By realizing a discrepancy error or the like that is not on the same plane, it is said that a test result equivalent to the state assembled in the CVT unit (actual machine) can be obtained.

JP 2014-122857 A

  By the way, in the CVT unit, the input shaft and the output shaft normally extend to the same side with respect to the input side pulley and the output side pulley (see, for example, FIG. 1 of Patent Document 1). In other words, the input shaft and the output shaft are arranged in parallel. In the testing machine, the torque meter attached to the input shaft and the output shaft has a certain size. For this reason, in the relatively small continuously variable transmission unit in which the input shaft and the output shaft are close to each other, it may be difficult to arrange the torque meters side by side. In other words, a test machine in which two torque meters are arranged side by side can be applied only to a continuously variable transmission unit in which the distance between the input shaft and the output shaft is relatively large, and there is a problem that versatility is low.

  Therefore, a continuously variable transmission is separately manufactured with the input shaft and output shaft extending in opposite directions with respect to the input pulley and output pulley (the input shaft, pulley, and output shaft are substantially Z-shaped). It is conceivable to arrange the two torque meters so as to face each other with the input side pulley and the output side pulley interposed therebetween.

  However, there is a problem that even if the transmission efficiency is measured using a continuously variable transmission portion that is a dedicated jig that does not reflect the structure of the actual machine, the original transmission rate cannot be evaluated.

  The present invention has been made in view of the above points, and an object of the present invention is to measure the transmission efficiency equivalent to the state assembled to the CVT unit in a test machine that measures the transmission efficiency of the continuously variable transmission unit. It is possible to realize a testing machine with high versatility.

  In order to achieve the above object, in the testing machine according to the present invention, the continuously variable transmission unit is provided with a reduction gear having an output member provided at a position away from the output shaft with respect to the input shaft, and the output shaft. A third torque meter is provided between the output pulley and the reduction gear.

  Specifically, the present invention includes an input-side pulley attached to an input shaft, an output-side pulley attached to an output shaft arranged in parallel with the input shaft, and an endless coil wound around these input-side and output-side pulleys. And a testing machine for measuring the transmission efficiency of a continuously variable transmission unit having a belt-like shape.

  The continuously variable transmission unit is connected to the output shaft and decelerates rotation of the output shaft to an output member provided at a position further away from the input shaft in the radial direction than the output shaft. A reduction gear for outputting; a first torque meter for measuring torque input to the input shaft; a second torque meter for measuring torque output from the output member; A strain gauge provided between the output pulley and the reduction gear and capable of wirelessly outputting the measured strain value, the torque value measured by the first and second torque meters, and the strain gauge The transmission efficiency of the whole or part of the continuously variable transmission unit including the reduction gear is acquired based on the distortion value of the output shaft measured by the above.

  According to this configuration, the continuously variable transmission has the reduction gear that decelerates and outputs the rotation of the output shaft to the output member provided at a position radially away from the input shaft than the output shaft. Therefore, by connecting the input shaft and the first torque meter and connecting the output member and the second torque meter, even if the input shaft and the output shaft are close to each other, the first and second torque meters Can be arranged side by side. Thereby, it is possible to realize a highly versatile testing machine that can be applied to a continuously variable transmission unit in which the distance between the input shaft and the output shaft is narrow. Thus, in the CVT unit (actual machine), the continuously variable transmission and the reduction gear are in a set, and the continuously variable including the reduction gear is based on the torque values measured by the first and second torque meters. In other words, the transmission efficiency in the state closer to the actual machine can be acquired.

  Here, the transmission efficiency acquired based on the torque values measured by the first and second torque meters includes not only the transmission efficiency of the belt portion but also the transmission efficiency of the reduction gear. In the invention, by providing a strain gauge between the output pulley and the reduction gear on the output shaft, the transmission efficiency of the belt portion and the transmission efficiency of the reduction gear can be separated.

  Specifically, since it is difficult to install a torque meter between the output pulley and the reduction gear, the measured distortion value is output wirelessly between the output pulley and the reduction gear on the output shaft. Possible strain gauges are provided (attached). Then, the torque value input to the reduction gear (torque value output from the belt portion) is measured by converting the strain value of the output shaft output from this strain gauge into torque using, for example, a measurement amplifier. It is possible to do. Accordingly, in the present invention, not only can the transmission efficiency of the entire continuously variable transmission unit be obtained in a state equivalent to the state assembled to the CVT unit, but also the torque value of the first torque meter and the output shaft It is possible to acquire the transmission efficiency of the belt part based on the distortion value of the gear, and it is possible to acquire the transmission efficiency of the gear based on the torque value of the second torque meter and the distortion value of the output shaft.

  As described above, according to the testing machine according to the present invention, it is possible to measure the transmission efficiency equivalent to the state assembled to the CVT unit and to realize a highly versatile testing machine.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the testing machine which concerns on embodiment of this invention, The figure (a) is a figure which shows schematic structure of a testing machine, The figure (b) typically shows the continuously variable transmission part in a test box. FIG. It is a figure which shows typically the attachment structure of a strain gauge and a telemeter.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a testing machine 1 according to the present embodiment. FIG. 1 (a) is a diagram showing a schematic configuration of the testing machine 1. FIG. 1 (b) is a continuously variable transmission in a test box 12. It is the schematic which shows the part 20 typically. As shown in FIG. 1A, the testing machine 1 drives the continuously variable transmission unit 20 accommodated in the test box 12 with the drive motor 2 and the absorption motor 3, as well as the first torque meter 4, Based on the torque values measured by the second torque meter 5 and the third torque meter 6, the transmission efficiency of the continuously variable transmission 20 is measured. Prior to the description of the testing machine 1, the continuously variable transmission 20 that is a measurement target will be described.

-Continuously variable transmission-
The continuously variable transmission unit 20 constitutes a CVT unit, and is attached to the input shaft 22, an output shaft 26 arranged in parallel with the input shaft 22, and the input shaft 22 as shown in FIG. The input side pulley 21, the output side pulley 25 attached to the output shaft 26, the endless CVT belt 29 wound around the input side and output side pulleys 21 and 25, and the rotation of the output shaft 26 are decelerated. And a reduction gear 30 for outputting.

  As shown in FIG. 1B, the input-side pulley 21 is a variable pulley having a variable effective diameter, and the stationary sheave 23 fixed to the input shaft 22 and the input shaft 22 slide only in the axial direction. The movable sheave 24 is arranged in a possible state.

  The output pulley 25 is also a variable pulley whose effective diameter is variable, like the input pulley 21, and is in a state in which the fixed sheave 28 fixed to the output shaft 26 and the output shaft 26 can slide only in the axial direction. And a movable sheave 27 arranged in the above.

  In this continuously variable transmission unit 20, the hydraulic control device 11 supplies hydraulic pressure to the movable sheaves 24 and 27, thereby changing the V groove widths of the input side pulley 21 and the output side pulley 25, and the contact diameter of the CVT belt 29. (Effective diameter) is changed, the gear ratio γ continuously changes, and the frictional force (belt clamping pressure) between the input side and output side pulleys 21 and 25 and the CVT belt 29 is controlled. ing. Such control is executed by the control device 10 transmitting a hydraulic pressure command to the hydraulic control device 11.

  The reduction gear 30 has a drive gear 31 provided at the end of the output shaft 26 opposite to the output pulley 25 and a shaft-like shape provided at a position farther away from the input shaft 22 than the output shaft 26 in the radial direction. Output member 33 and a driven gear 32 that is attached to the output member 33 and meshes with the drive gear 31. The driven gear 32 has a larger diameter than that of the drive gear 31, whereby the rotation of the output shaft 26 can be decelerated and output from the output member 33. In the following, for convenience of explanation, the portion of the continuously variable transmission portion 20 excluding the reduction gear 30 is also referred to as a CVT belt portion.

  The input shaft 22, the output shaft 26, and the output member 33 are rotatably supported by the housing 20a (see FIG. 2) via bearings 34, 35, and 36, and can be set in the test box 12 together with the housing 20a. It has become.

  In the continuously variable transmission 20 configured as described above, the torque (rotation) input to the input shaft 22 as shown by the white arrow in FIG. 1B is applied at an appropriate speed ratio γ in the CVT belt. Increased or decreased (decelerated or increased) and output from the output shaft 26, increased (decelerated) by the reduction gear 30, and output from the output member 33 as indicated by the black arrow in FIG. It has become.

-Testing machine-
As shown in FIG. 1, the testing machine 1 includes a main body 1 a, a control device 10, a hydraulic control device 11, and a torque converter 9 that is a part of the third torque meter 6. The main body 1a includes a drive motor 2, an absorption motor 3, a first torque meter 4, a second torque meter 5, a strain gauge 7 and a telemeter 8 that are part of the third torque meter 6, and a continuously variable transmission. And a test box 12 that houses the section 20.

  The drive motor 2 is controlled by a control signal transmitted from the control device 10 and outputs a simulation of the rotation of the actual engine instead of the engine actually mounted on the vehicle. The motor shaft 2a of the drive motor 2 is connected to the input shaft 22 of the continuously variable transmission unit 20, so that the input shaft 22 rotates in a state close to the state driven by the actual engine. The motor shaft 2a is provided with a damper 13 that attenuates vibration, and an intermediate shaft 14 that extends the motor shaft 2a so as to reflect the influence of the length of the vehicle-mounted shaft or the like. The transmission efficiency of the continuously variable transmission unit 20 is made closer to the state actually mounted on the vehicle.

  On the other hand, the absorption motor 3 is controlled by a control signal transmitted from the control device 10, and gives resistance in running applied to the CVT unit to the continuously variable transmission 20 in a simulated manner. The motor shaft 3 a of the absorption motor 3 is connected to the output member 33 of the continuously variable transmission unit 20, whereby a rotational force opposite to the rotational force of the drive motor 2 is applied to the output member 33. ing. The motor shaft 3a is provided with a damper 13 that attenuates vibration and an intermediate shaft 14 that extends the motor shaft 3a so as to reflect the influence of the length of a drive shaft (not shown).

  The first torque meter 4 is provided on the motor shaft 2 a of the drive motor 2, measures the torque input to the input shaft 22, and transmits the measured torque value to the control device 10. The second torque meter 5 is provided on the motor shaft 3 a of the absorption motor 3, measures the torque output from the output member 33, and transmits the measured torque value to the control device 10. The torque measurement timings of the first and second torque meters 4 and 5 are controlled by the control device 10 so as to coincide with the measurement timing of the third torque meter 6 described later.

  As shown to Fig.1 (a), since the 1st and 2nd torque meters 4 and 5 have a certain amount of magnitude | size, the input shaft 22 and the output shaft 26 adjoin and are relatively small. In the continuously variable transmission unit, it may be difficult to arrange the first and second torque meters 4 and 5 side by side. In this regard, in the present embodiment, the reduction gear 30 having the output member 33 provided in the radial direction from the input shaft 22 than the output shaft 26 is provided, and the output member 33 is provided via the motor shaft 3a. Since the second torque meter 5 is attached, the first and second torque meters 4 and 5 can be arranged side by side even when the input shaft 22 and the output shaft 26 are close to each other. As a result, it is possible to realize a highly versatile testing machine that can be applied to the continuously variable transmission unit in which the distance between the input shaft 22 and the output shaft 26 is narrow, and transmission in a state closer to the state assembled to the CVT unit. It is possible to obtain efficiency.

  As described above, by providing the first and second torque meters 4 and 5, the transmission efficiency of the entire continuously variable transmission unit 20 is acquired based on the torque values measured by the first and second torque meters 4 and 5. However, the transmission efficiency acquired in this way includes not only the transmission efficiency of the CVT belt portion but also the transmission efficiency of the reduction gear 30. For this reason, in the present embodiment, the torque input to the reduction gear 30 (torque output from the CVT belt portion) is measured so that the transmission efficiency of the CVT belt portion and the transmission efficiency of the reduction gear 30 can be separated. A possible third torque meter 6 is provided.

  Specifically, since it is difficult to provide a torque meter between the output side pulley 25 and the reduction gear 30, it was measured between the output side pulley 25 and the reduction gear 30 on the output shaft 26. A strain gauge 7 capable of wirelessly outputting a strain value is provided, and the strain value of the output shaft 26 that is wirelessly output from the strain gauge 7 is converted into a torque by using the torque converter 9 to be input to the reduction gear 30. Torque (torque output from the CVT belt) is measured.

  FIG. 2 is a diagram schematically showing the mounting configuration of the strain gauge 7 and the telemeter 8. In FIG. 2, the CVT belt 29 is not shown in order to make the drawing easier to see. The strain gauge 7 is a known one whose electric resistance fluctuates with respect to the force of expansion and contraction generated in the strain gauge 7, and as shown in FIG. It is stuck between the reduction gear 30. The telemeter 8 is a known telemeter transmitter having an antenna function, and is provided in the vicinity of the strain gauge 7 and is electrically connected to the strain gauge 7. The telemeter 8 is configured to be able to wirelessly transmit the strain value measured by the strain gauge 7 while the output shaft 26 is rotating, and the torque transducer in which the measured strain value of the output shaft 26 is installed outside the test box 12. 9 is transmitted. The torque converter 9 accurately converts the torque input to the reduction gear 30 by converting the measured value of the strain gauge 7, that is, the torsion amount (surface shear stress) corresponding to the torque of the output shaft 26 into a voltage. Then, the converted torque value is transmitted to the control device 10.

  That is, in the present embodiment, the strain gauge 7 and the telemeter 8 correspond to the “strain gauge capable of wirelessly outputting the measured strain value” in the present invention. The third torque meter 6 of the present embodiment includes a strain gauge 7, a telemeter 8 capable of transmitting a strain value measured by the strain gauge 7, and a torque converter 9 that converts the strain value into torque. Yes.

  By using the third torque meter 6 including the strain gauge 7, the telemeter 8 and the torque converter 9 to measure the torque value input to the reduction gear 30, the torque value measured by the first torque meter 4 Acquiring the transmission efficiency of the CVT belt portion based on the torque value measured by the third torque meter 6 can be obtained by the torque value measured by the second torque meter 5 and the torque value measured by the third torque meter 6. Based on the above, the transmission efficiency of the reduction gear 30 can be acquired.

  When a simulated throttle command is input, the control device 10 transmits a hydraulic pressure command to the hydraulic control device 11 based on the throttle command, and supplies the hydraulic pressure to the movable sheaves 24 and 27 by the hydraulic control device 11 so that it is continuously variable. The transmission gear ratio γ and the clamping pressure of the transmission unit 20 are changed. The control device 10 controls the drive motor 2 to simulate the engine explosion fluctuation torque, and controls the absorption motor 3 in consideration of the moment of inertia applied from the output shaft 26 to the tire, the resistance to the road surface of the tire, and the like. Then, the dynamic characteristic fluctuation torque of the vehicle is simulated.

  In addition, the control device 10 is configured so that the measurement of the torque value by the first and second torque meters 4 and 5 and the measurement of the torque value by the strain gauge 7, the telemeter 8, and the torque converter 9 are synchronized in time. It has a logger function that controls the part.

-Calculation of transmission efficiency-
In the testing machine 1 configured as described above, the control device 10 reproduces a state equivalent to the state assembled to the CVT unit, while the control device 10 performs the transmission work amount and output on the input side in each part of the continuously variable transmission unit 20. The transmission efficiency is calculated by comparing the transmission work on the side. Specifically, the control device 10 calculates the transmission efficiency in each part of the continuously variable transmission unit 20 using the following (Equation 1).
Transmission efficiency = 100 × (output rotational speed × output torque) / (input rotational speed × input torque) (Equation 1)
<Transmission efficiency (overall)>
First, the input rotational speed N _in of the motor shaft 2 a of the drive motor 2, the input torque T _in measured by the first torque meter 4, the output rotational speed N _out of the motor shaft 3 a of the absorption motor 3, and the second torque By applying the output torque T _out measured by the total 5 to the above (Formula 1), the following (Formula 2) is obtained.
Transmission efficiency (whole) = 100 × (N _out × T _out ) / (N _in × T _in ) (Expression 2)
From this (Equation 2), it is possible to calculate the transmission efficiency of the entire continuously variable transmission 20 including the reduction gear 30, which is the transmission efficiency equivalent to the state assembled to the CVT unit.

<Transmission efficiency (belt)>
Next, if the influence of the reduction gear 30 is ignored, in other words, if the transmission state by the reduction gear 30 is perfect (100%), the rotational speed on the input side of the reduction gear 30 is the output side of the reduction gear 30. The relationship is equal to the number of revolutions × gear ratio. Therefore, if the influence of the reduction gear 30 is ignored, the product (N _out × Gr) of the output rotation speed N _out of the motor shaft 3 a of the absorption motor 3 and the gear ratio Gr of the reduction gear 30 is the reduction gear 30. Is equal to the rotational speed on the input side, that is, the rotational speed on the output side of the CVT belt portion. Note that the gear ratio Gr of the reduction gear 30 = (the number of teeth of the driven gear 32 / the number of teeth of the drive gear 31).

Therefore, the input speed N _in of the motor shaft 2a of the drive motor 2, and the input torque T _in measured by the first torque meter 4, the output speed N _out of the motor shaft 3a of the absorbing motor 3, a reduction gear 30 The following (Expression 3) is obtained by applying the gear ratio Gr and the torque T ₃ measured by the third torque meter 6 to the above (Expression 1).
Transmission efficiency (belt) = 100 × (N _out × Gr × T ₃ ) / (N _in × T _in ) (Equation 3)
From this (Equation 3), based on the torque value T _in measured by the first torque meter 4 and the torque value T ₃ measured by the third torque meter 6, only the CVT belt portion in the continuously variable transmission portion 20 is obtained. The transmission efficiency can be easily calculated.

<Transmission efficiency (gear)>
Similarly, if the influence of the CVT belt portion is ignored, in other words, if the transmission state by the CVT belt portion is perfect (100%), the rotational speed / transmission ratio γ on the input side of the CVT belt portion is determined by the CVT belt portion. It is in the same relationship as the rotation speed on the output side. Therefore, if the influence of the CVT belt portion is ignored, the quotient (N _in ÷ γ) between the input rotational speed N _in of the motor shaft 2a of the drive motor 2 and the speed ratio γ is the rotation on the output side of the CVT belt portion. This is equal to the number, that is, the rotational speed on the input side of the reduction gear 30. Note that the gear ratio γ of the CVT belt portion can be easily calculated by the control device 10 based on the hydraulic pressure supplied to the movable sheave 24 of the input pulley 21.

Therefore, the input rotation speed N _in of the motor shaft 2 a of the drive motor 2, the transmission ratio γ of the CVT belt portion, the torque T ₃ measured by the third torque meter 6, and the output rotation of the motor shaft 3 a of the absorption motor 3 By applying the number N _out and the output torque T _out measured by the second torque meter 5 to the above (Formula 1), the following (Formula 4) is obtained.
Transmission efficiency (gear) = 100 × (N _out × T _out ) / (N _in / γ × T ₃ ) (Equation 4)
From (Equation 4), based on the torque value T _out measured by the second torque meter 5 and the torque value T ₃ measured by the third torque meter 6, only the reduction gear 30 in the continuously variable transmission 20 is obtained. The transmission efficiency can be easily calculated.

-Effect-
As described above, according to the testing machine 1 of the present embodiment, the reduction gear 30 having the output member 33 provided in the radial direction from the input shaft 22 rather than the output shaft 26 is provided, and the output member Since the second torque meter 5 is attached to 33 via the motor shaft 3a, the first and second torque meters 4 and 5 can be arranged side by side even when the input shaft 22 and the output shaft 26 are close to each other. . As a result, for example, the continuously variable transmission portion formed as a dedicated jig that does not reflect the actual machine, such as the input shaft 22 and the output shaft 26 extending to the opposite sides of the input pulley 21 and the output pulley 25, respectively. The transmission efficiency of the continuously variable transmission unit 20 can be obtained using a conventional testing machine without manufacturing the above. Therefore, it is possible to measure the transmission efficiency equivalent to the state assembled in the CVT unit and realize the testing machine 1 having high versatility.

  Further, according to the testing machine 1, by providing the strain gauge 7 between the output side pulley 25 and the reduction gear 30 on the output shaft 26, the transmission efficiency of the CVT belt portion and the transmission efficiency of the reduction gear 30 can be separated. Is possible. Thus, since the transmission efficiency of the CVT belt portion and the transmission efficiency of the reduction gear 30 can be separated, the measurement variation of the transmission efficiency of the CVT belt portion and the measurement variation of the transmission efficiency of the reduction gear 30 do not overlap. It is possible to accurately grasp the transmission efficiency of the belt portion.

  Furthermore, since the transmission efficiency of the CVT belt portion and the transmission efficiency of the reduction gear 30 can be separated, even if the reduction gear 30 that is a periodic replacement product is replaced by maintenance, in other words, there is a product error in the reduction gear 30 and the transmission efficiency. Even if there are variations in the transmission efficiency, it is possible to accurately measure the transmission efficiency of the CVT belt unit alone.

  In addition, since the transmission efficiency of the continuously variable transmission unit 20 as a whole, the transmission efficiency of the CVT belt unit, and the transmission efficiency of the reduction gear 30 can be separated, the test box 12 and the motor shafts 2a and 3a constituting the test machine 1 With respect to the influence on the transmission efficiency due to the change over time, it is possible to isolate the time-change part.

  Further, in the actual machine, the CVT belt part and the reduction gear 30 are integrated, so the test machine 1 of the present embodiment can measure the transmission efficiency of the continuously variable transmission part 20 including the reduction gear 30. For example, it is possible to easily evaluate the transmission efficiency of the developed product simply by setting the developed product in the test box 12.

(Other embodiments)
The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  In the above-described embodiment, the strain gauge 7 and the telemeter 8 are combined to form a “strain gauge that can wirelessly output the measured strain value”. However, the present invention is not limited to this. For example, a wireless strain gauge embedded with antenna wiring is used. It may be used.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  According to the present invention, it is possible to measure a transmission efficiency equivalent to the state assembled to the CVT unit and realize a highly versatile testing machine, so that the testing machine for measuring the transmission efficiency of the continuously variable transmission can be realized. It is extremely beneficial to apply.

DESCRIPTION OF SYMBOLS 1 Test machine 4 1st torque meter 5 2nd torque meter 7 Strain gauge 8 Telemeter 20 Continuously variable transmission part 21 Input side pulley 22 Input shaft 25 Output side pulley 26 Output shaft 29 CVT belt 30 Reduction gear 33 Output member

Claims (1)

Stepless having an input-side pulley attached to the input shaft, an output-side pulley attached to an output shaft arranged in parallel with the input shaft, and an endless belt wound around the input-side and output-side pulleys A testing machine for measuring transmission efficiency of a transmission unit,
The continuously variable transmission unit is connected to the output shaft and outputs the output shaft by decelerating the rotation of the output shaft to an output member provided at a position farther in the radial direction from the input shaft than the output shaft. A further reduction gear,
A first torque meter for measuring torque input to the input shaft;
A second torque meter for measuring torque output from the output member;
A strain gauge provided between the output pulley on the output shaft and the reduction gear, and capable of wirelessly outputting the measured strain value;
The whole or part of the continuously variable transmission including the reduction gear based on the torque value measured by the first and second torque meters and the strain value of the output shaft measured by the strain gauge. A testing machine characterized by acquiring the transmission efficiency of

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