What Is Positive Clutch? – Types, Function, Parts, Application, Diagram

A positive clutch is a mechanical device used to transmit torque between two rotating components. Learn about the function, applications, advantages, and disadvantages of a positive clutch.

What Is Positive Clutch?

What Is Positive Clutch?
Positive Clutch Diagram

A positive clutch is used when a positive (no slip) drive is required. These clutches transmit power from the drive shaft to the powered shaft by interlocking the jaw or teeth. They are used much less than friction clutches.

The Jaw Clutch consists of two parts; One of them is permanently attached to the driver shaft. The other half is movable and connected to the operated shaft. It can slide axially onto the shaft independently, but cannot bend due to the key to the wing. They can transmit power in both directions; They are used when it is not necessary to attach or separate under load.

The spiral jaw clutch (Figure 2) is used when it only needs to transmit power in one direction; It can be left-handed or right-handed. They are used when it is necessary to engage and isolate while in motion.

Clutch Video

Parts Of Positive Clutch

  • Jaws – These are the two rotating components that transmit torque through the clutch. They are typically made of a hard, durable material such as steel or bronze.
  • Spring – This is the flexible element that connects the two jaws and allows them to rotate relative to each other. It is typically made of a strong, flexible material such as steel or a high-strength polymer.
  • Shafts – These are the rotational components that the jaws are mounted on. They are typically made of a strong, durable material such as steel or aluminum.
  • Housing – This is the enclosure that contains the jaws, springs, and shafts. It is typically made of a strong, durable material such as cast iron or steel.
  • Bearings – These are mechanical components that allow the shafts to rotate smoothly and reduce friction. They are typically made of a hard, durable material such as steel or ceramic.
  • Seals – These are mechanical components that prevent dirt, debris, and other contaminants from entering the housing and damaging the internal components. They are typically made of a strong, durable material such as rubber or a high-strength polymer.

Types Of Positive Clutch

Spiral Jaw Clutch

Spiral Jaw Clutch
Spiral Jaw Clutch

A spiral jaw clutch is a mechanical device that is used to transmit torque between two shafts or other rotating components. It consists of a pair of jaws that are mounted on separate rotational shafts and connected by a spiral-shaped spring or another flexible element. When one of the jaws is rotated, it causes the spring to wind up or unwind, which in turn causes the other jaw to rotate.

The amount of torque that can be transmitted through a spiral jaw clutch is determined by the strength of the spring and the size of the jaws. These types of clutches are often used in applications where a precise amount of torque needs to be transmitted, such as in the drivetrain of a vehicle or a machine tool.

Square Jaw Clutch

Square Jaw Clutch
Square Jaw Clutch

A square jaw clutch is a type of mechanical device that is used to transmit torque between two rotating components. It consists of a pair of jaws that are mounted on separate rotational shafts and are connected by a spring or other flexible element. The jaws are shaped like a square, with each side of the square having a different degree of hardness or friction. When one of the jaws is rotated, it causes the spring to wind up or unwind, which in turn causes the other jaw to rotate.

The amount of torque that can be transmitted through a square jaw clutch is determined by the strength of the spring and the size of the jaws, as well as the degree of hardness or friction of the jaw surfaces. These types of clutches are often used in applications where a precise amount of torque needs to be transmitted, such as in the drivetrain of a vehicle or a machine tool.-

Working Of Positive Clutch

The primary function of positive clutch is to transmit torque between two rotating components. It does this by mechanically locking the two components together, allowing them to rotate as a single unit.

Positive clutches are typically used in applications where a high amount of torque needs to be transmitted with little to no slip. They are often used in the drivetrain of vehicles, such as automobiles and motorcycles, as well as in industrial machinery.

In a vehicle, a positive clutch is typically used to transmit torque from the engine to the transmission, allowing the vehicle to move forward or backward. In industrial machinery, a positive clutch may be used to transmit torque between various components in the machine, such as a motor and a pump, or a drive shaft and a gear.

Overall, the function of a positive clutch is to provide a reliable and efficient means of transmitting torque between rotating components in a variety of different applications.

⭐ Read More Articles – What Is Diaphragm Clutch?

Advantages Of Positive Clutch

  1. Positive clutches are more reliable and have a longer lifespan than other types of clutches
  2. They provide more precise and accurate control over the transmission of power
  3. They allow for smoother engagement and disengagement of the gears
  4. They are less prone to slipping, which can improve the overall efficiency of the vehicle
  5. They can handle higher torque loads than other types of clutches
  6. They are less affected by wear and tear, which can reduce maintenance costs over time

⭐ Read More Articles – What Is Hydraulic Clutch?

Disadvantages Of Positive Clutch

  1. Positive clutches are generally more expensive than other types of clutches
  2. They are typically heavier, which can affect the overall weight balance of the vehicle
  3. They require more maintenance and regular servicing
  4. They are more difficult to repair or replace than other types of clutches
  5. They have more complex internal mechanisms, which can make them less user-friendly
  6. They require special tools and equipment for installation and maintenance

⭐ Read More Articles – What Is Semi Centrifugal Clutch?

Application of Positive Clutch

  1. Industrial Machinery – Positive clutches are used in a wide range of industrial machinery, such as conveyor belts, cranes and hoists, to transmit power and enable the circulation of heavy loads.
  2. Power Tools – Positive clutches are used in many power devices, such as drills, saws, and sanders, to transmit power and enable rotation of the tool’s bit or blade.
  3. Aerospace – Positive clutches are used in aircraft control systems to transmit power and enable the speed of flight control.
  4. Marine – Positive clutches are used in the propulsion system of ships and boats to transmit power from engines to propellers.
  5. Agricultural Machinery – Positive clutches are used in a variety of agricultural machinery, such as tractors and combine harvesters, to transmit power and enable the movement of equipment.

⭐ Read More Articles – What Is Centrifugal Clutch?

FAQ’s

What are some common types of positive clutches?

1. Spiral Jaw Clutch
2. Square Jaw Clutch

What are the disadvantages of positive clutch?

One potential disadvantage of a positive clutch is that it can generate heat while transmitting a high level of torque, which can lead to wear and tear over time. Additionally, positive clutches may require more maintenance and may be more expensive to repair or replace than other types of mechanical equipment.

What are the advantages of a positive clutch?

Positive clutch provides many advantages, including smooth and precise control over the transmission of power, the ability to quickly engage and disassemble, and the ability to transmit high torque without slipping.

How does the positive clutch work?

A positive clutch usually has two components: a driving member, which is connected to the power source, and a powered member, which is attached to the load. The driving and operating members are separated from friction materials such as clutch plates. When the clutch is mounted, the driving and powered members come in contact with each other, causing the friction material to catch up and transmit torque. When the clutch is disassembled, the driving and driven members are separated, and the power is not transmitted.

Q: Can positive clutches be adjusted? A

Some Positive-Clutches can be adjusted to adjust the amount of torque they transmit or to compensate for wear. Adjustments can be made by changing the amount of pressure applied to the clutch or adjusting the clearance between driving and operating members.

How can I tell if my positive clutch is rubbing?

There are some indications that a positive clutch may malfunction, this includes slipping, difficulty engaging or separating the clutch, and an increase in the operating temperature. If you notice any of these problems, it may be necessary to inspect or replace the clutch. It is important to address any issues with a Positive-clutch as soon as possible to prevent further damage.

If you liked the article then don’t forget to share it with your loved one. ❤️ Please comment below to give your valuable feedback, and follow me on Instagram to stay comment with me. 🙏

Leave a Comment