Universal joint#

block — Block appearance in REPEAT VISION#

Joint (universal) clutch transmits the torque (see Fig. 1 below) to a load shaft located at a distance, or in case of misalignment of the drive and driven shafts.

External_parameters — Fig. 1 External parameters#

The signal given to input 3 is the angle between the two connected shafts in degrees. When angular velocity is converted, the input 1 receives the angular velocity of the first shaft, and then the angular velocity of the second shaft is calculated with respect to the angular characteristics.

Velocity and torque conversion equations (1), (2):

(1)#\[\omega_{выход}=\omega_{вход} \cdot \frac{\cos \theta}{1 - {\sin \theta}^2 \cdot {\sin (total+phase)}^2 }\]

(2)#\[T_{вход}=T_{выход} \cdot \frac{\cos \theta}{1 - {\sin \theta}^2 \cdot {\sin (total+phase)}^2 }\]

The phase shift between two clutches connected in series is specified in parameters. The Shaft rotation angle property is used when more than two joint clutches are connected in series, in this parameter it is necessary to specify the sum of values of Shaft rotation angle and Phase difference between the shafts properties of the previous joint shaft.

As an example of the use of a joint clutch, consider a classic drive shaft of two clutches (see Fig. 2 below). The first clutch shall have all properties set to 0, the second clutch shall have the Phase difference between the shafts property set to 90 degrees. The transfer of the shear angle to both clutches ensures the damping of the angular velocity fluctuations generated at the first clutch.

cardan_shaft — Fig. 2 Example of drive shaft#

1. Properties#

Property	Default Value	Description	Units of measurement
Phase difference between the shafts	0.0	-	deg
Shaft rotation angle	0.0	-	deg
Switch between torque and angular velocity: On - connects to the ports receiving/transmitting torques; Off - connects to blocks receiving/transmitting angular velocity	Off	-	-

2. Inputs and outputs#

Parameters	Input/Output	Description	Units of measurement	Port type
Angle	Input	-	deg	Automation
Angular velocity	Input	Available when `Switch between torque and angular velocity` - `Off`	\(\frac{rad}{s}\)	Rotational motion
Angular velocity	Output	Available when `Switch between torque and angular velocity` - `Off`	\(\frac{rad}{s}\)	Rotational motion
Torque	Input	Available when `Switch between torque and angular velocity` - `On`	N\(\cdot\)m	Rotational motion
Torque	Output	Available when `Switch between torque and angular velocity` - `On`	N\(\cdot\)m	Rotational motion

In order to see the connection capabilities of the block, you need to go to page Description of block ports