This standard defines the terminology and specifications related to shearing machines used in sheep shearing. It provides a comprehensive overview of the components, mechanisms, and operational parameters involved in the design and function of these devices.
1. **Shear Shearer**: A machine designed for cutting wool from sheep using a shearing mechanism.
2. **Flexible Shaft or Joint Shaft Shearer**: A shearing machine that uses a flexible or articulated shaft to transmit power from the motor to the cutting unit.
3. **Direct-Acting Shearing Machine**: A type of shearer directly driven by a motor, typically used in power-driven applications.
- **3.1 Intermediate Frequency Motor Shearer**: A direct-acting shearer powered by a micro-frequency motor.
- **3.2 Single-Phase Series Shearer**: A shearer driven by a small single-phase series motor, commonly used in compact models.
- **3.3 Air Operated Shearer**: A shearing device powered by an air motor, offering high torque and reliability.
- **3.4 Hydraulic Shearer**: A shearer driven by a hydraulic motor, known for its smooth operation and power efficiency.
4. **Body**: The main frame of the shearer that houses and supports all internal components.
5. **Shearing Mechanism**: Composed of a fixed blade and a moving blade. The moving blade oscillates back and forth against the fixed blade to cut the wool.
- **5.1 Moving Blade / Upper Blade**: The active blade that cuts the wool during operation.
- **5.2 Fixed Blade / Lower Blade / Comb Blade**: The stationary blade that supports and helps cut the wool.
6. **Pressure Mechanism / Tension Mechanism**: Adjusts the pressure applied to the shearing blades.
- **6.1 Threaded Sleeve / Tension Nut**: Connects the pressurizing components to the body.
- **6.2 Compression Nut / Tension Nut**: Used to adjust the working pressure of the shearing device.
- **6.3 Sliding Sleeve / Pressure Tube**: Ensures proper alignment and direction of pressure transmission.
- **6.4 Tension Rod / Tension Pin / Pressure Transmission Rod**: Transmits force from the pressure mechanism to the shearing blades.
7. **Eccentric Mechanism / Crank Unit**: Converts rotational motion into the oscillating motion of the moving blade.
- **7.1 Pendulum Rod Assembly / Fork Assembly**: Transmits power and pressure to the moving blade.
- **7.1.1 Pendulum Fork**: A component that swings back and forth to apply pressure.
- **7.1.2 Left and Right Pressing Claws (RH & LH)**: Claw-like parts that transfer force to the moving blade.
- **7.2 Support Pins / Twisting Pin / Fulcrum Post**: Supports the pivot points of the swinging mechanism.
- **7.3 Roller Crank / Roller**: Small spherical bearings used in the eccentric system.
- **7.4 Eccentric Shaft / Main Spindle with Crank Shaft**: The central rotating part that drives the shearing action.
- **7.5 Bushing / Sleeve Bush**: Provides bearing support for rotating components.
8. **Hinge Mechanism / Articulated Mechanism**: A hinged system that connects the body to the flexible or joint shaft, enabling movement.
- **8.1 Inner and Outer Joints (Back Joint – Short & Long)**: Supports the eccentric shaft and transmission shaft.
- **8.2 Joint Gear / Cog**: A special gear that allows power transmission even when the axis angle changes.
- **8.3 Drive Shaft / Short Shank**: Connects to the flexible or joint shaft to transmit power.
9. **Shear Width**: The lateral distance between the two sides of the fixed blade.
- **9.1 Wide Cut**: A shear width of at least 70mm.
- **9.2 Narrow Cut**: A shear width below 70mm.
10. **Power Blade Oscillation Frequency**: The number of blade oscillations per second.
11. **Stroke**: The horizontal distance the blade moves from one extreme position to another.
12. **Tooth Pitch**: The lateral distance between adjacent blade tips.
13. **Blades – Actual Working Surface**: Includes all edges of the blade, including the knife edge.
14. **Tooth Side Surface**: The side surface of each tooth on the blade.
15. **Blade Edge / Knife Edge**: The actual edge where the blade meets the tooth line.
16. **Blade Concavity / Knife Concavity**: The maximum chord height of the blade’s actual surface.
17. **Inter-blade Pressure**: The positive pressure between the cutter and comb blades.
18. **Static Differential Pressure Between Blades**: The maximum pressure difference between the blades under normal operating conditions.
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