Product Description

Quick couplers (also called quick hitches) are used with construction machines to allow the rapid change of buckets and attachments on the machine. They remove the need to use hammers to manually drive out and insert the mounting pins for attachments. They can be used on excavator, mini excavator, backhoe loader and so on.

We can supply 3 type: hydraulic type, Double lock type and Mechanical type.

                                                                                      Multi-quick hitch

Multi-Quick Coupler Specification
Model	Unit	RQH01D(a)	RQH01D(b)	RQH02D	RQH04D	RQH06D	RQH08D	RQH10D(a)	RQH10D(b)
Carrier Weight	T	1~2	2~4	4~6	6~8	10~15	15~27	25~32	30~36
Pin Diameter	mm	30	35/40	45	50/55	60/65	70/80	90	90/100
Arm Width(W1)	mm	105~125	110~135	140~180	185~220	220~270	300-340	350~390	390~420
Center To Center(A1)	mm	120~140	140~215	185~290	260~320	340~430	380~490	460~530	480~550
Equipping Distance(A2)	mm	120~140	140~215	185~290	260~320	340~430	380~490	460~530	480~550
Up and Down pin  center distance(H1)	mm	125	125	165-175	200	245	275	315
Working Pressure	Bar	40~248	40~248	40~248	40~205	40~205	40~205	40~205	40~205
Oil Flow	L/min	10~20	10~20	10~20	10~20	10~20	10~20	10~20	10~20
Unit Weight	Kg	20	23.5	51-80	110	185	340	500
Unit Length	mm	370	400	505-610	655	820	980	1060
Unit Width	mm	220	240	275-330	312	440	510	560
Unit High	mm	210	210	265-320	335	410	490	560
Lifting Eye Rating	T	1	1	2-3	4	5	8

We can also product hydraulic type and double lock type.

Advantages:

1. Welding Technique: 17 years experience, full welding and not easy to crack.

2. Grease Nipple: Make pin not easy to wear

3. Double Lock System: Front jaw lock and Rear safety lock make the operation much safer. Which embrace the pins tightly even if the cylinder suddenly inoperation.

4. Imported oil cylinder and not easy to damage

5. Without safety pin and excavator operator can operate  it in the cab alone.

6. Wide range of application: Compared with fixed C to C distance(A) of routine quick hitch,  multi quick hitch is more flexible. It is suitable for all attachments with the C to C distance(A) within its range. 

1. Open the cylinder, and ensure slide is fully extended with front jaw safety lock open.

2. Line up attachments and engage front attachments pin.

3. Close the cylinder. This will retract the slide mechanism and this will visibly lock the front jaw safety latch around front attachment pin.

4. Open the cylinder again. The sliding mechanism will extend and engage the rear slide hook CHINAMFG the rear attachment pin.

5. Proceed with connection test.

 

RAY ATTACHMENTS includes HangZhou CHINAMFG International Trading Company and HangZhou CHINAMFG Precision Machinery Co.,Ltd. It is a Integrated Company dedicated to production, research and development and sales of construction machinery attachments.with 17 years experience. The main products include earth auger, quick hitch, hydraulic breaker, vibro ripper and other heavy duty equipment. Our company covers an area of more than 20000 square CHINAMFG and has more than 150 employees, including professional R & D teams and Sales Department. Welcome to visit!

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What are the maintenance requirements for hydraulic couplings to ensure optimal performance?

Maintaining hydraulic couplings is crucial to ensure their optimal performance and extend their service life. Regular maintenance helps identify potential issues early on and prevents costly breakdowns. Here are the essential maintenance requirements for hydraulic couplings:

• Inspection: Regularly inspect the hydraulic coupling for signs of wear, damage, or leaks. Check for any unusual noises, vibrations, or changes in performance during operation.
• Lubrication: Ensure proper lubrication of the coupling’s moving parts. Use the manufacturer-recommended lubricants and follow the specified intervals for re-lubrication.
• Coupling Alignment: Check and correct the alignment of the driving and driven shafts connected by the coupling. Misalignment can lead to premature wear and reduce coupling efficiency.
• Bolt Tightening: Regularly check and tighten the bolts and fasteners securing the coupling. Loose bolts can lead to coupling slippage and compromised power transmission.
• Cleanliness: Keep the hydraulic coupling and its surrounding area clean from dirt, debris, and contaminants. Clean the coupling during scheduled maintenance to prevent contamination-related issues.
• Temperature and Pressure Checks: Monitor the operating temperature and pressure to ensure they remain within the specified limits for the coupling. Operating beyond the recommended ranges can cause damage and reduce coupling performance.
• Overload Prevention: Avoid exceeding the rated torque capacity of the coupling to prevent overload and potential damage to the coupling or connected equipment.
• Replacement of Worn Parts: Replace any worn or damaged components of the hydraulic coupling promptly. Follow the manufacturer’s guidelines for part replacement and use genuine spare parts when needed.
• Periodic Maintenance: Establish a regular maintenance schedule for the hydraulic coupling based on the operating conditions and manufacturer recommendations. Adhering to this schedule helps identify and address issues before they become severe.
• Expert Inspection: If you encounter any unusual performance issues or suspect coupling problems, consult a hydraulic system expert for a detailed inspection and analysis. They can provide valuable insights and recommendations for maintenance and repairs.

Proper and consistent maintenance of hydraulic couplings is essential to ensure their reliability, efficiency, and safe operation. By following the recommended maintenance practices, you can prolong the life of the hydraulic coupling and optimize the performance of your hydraulic system.

What are the standard sizes and thread types available for hydraulic couplings?

Hydraulic couplings come in a variety of sizes and thread types to accommodate different hydraulic system requirements. The standard sizes and thread types are specified based on industry standards and regional norms. Here are some common standard sizes and thread types for hydraulic couplings:

• Thread Types:
  • NPT (National Pipe Thread): NPT is a widely used thread type in North America. It has a tapered thread design and requires thread sealants like Teflon tape to ensure a leak-free connection.
  • BSP (British Standard Pipe): BSP is commonly used in Europe and many other parts of the world. It can have parallel (BSPP) or tapered (BSPT) threads and often requires thread sealants for a secure connection.
  • JIC (Joint Industry Council): JIC threads have a 37-degree flare angle and are prevalent in hydraulic systems. They provide a reliable metal-to-metal seal without the need for thread sealants.
  • SAE (Society of Automotive Engineers): SAE threads are commonly used in mobile hydraulic applications. They have a 45-degree flare angle and offer excellent sealing capabilities.
  • ORFS (O-Ring Face Seal): ORFS fittings feature a flat face with an O-ring seal. They are suitable for high-pressure applications and provide a reliable leak-free connection.
• Standard Sizes:
  • Hydraulic couplings are available in various standard sizes, typically measured in inches or millimeters. Common sizes for hydraulic couplings include 1/4″, 3/8″, 1/2″, 3/4″, 1″, and 1 1/4″ for smaller couplings and up to larger sizes like 2″, 2 1/2″, and 3″ for heavy-duty industrial applications.
  • Metric sizes, such as 6 mm, 10 mm, 12 mm, 16 mm, and 20 mm, are also commonly used in hydraulic systems, especially in countries that follow the metric system.
  • Some specialized hydraulic systems may require custom sizes to meet specific application needs.

It’s important to note that while these thread types and sizes are commonly used, there may be other proprietary or industry-specific thread types and sizes depending on the manufacturer or application requirements. When selecting hydraulic couplings, it’s essential to ensure that the chosen couplings match the thread type and size of the corresponding components in the hydraulic system to ensure a proper and secure connection.

Hydraulic coupling manufacturers often provide detailed specifications and technical information about their products, including the available thread types and sizes, to help users select the right couplings for their specific hydraulic system needs.

How do you select the appropriate hydraulic coupling for specific fluid handling needs?

Selecting the right hydraulic coupling for specific fluid handling needs involves considering several critical factors to ensure optimal performance and reliability. Here’s a step-by-step guide to help you make an informed choice:

1. Fluid Type: Identify the type of fluid that the coupling will handle. Different fluids have varying viscosities and chemical properties, which can impact the compatibility and material selection for the coupling.
2. Operating Pressure and Temperature: Determine the maximum operating pressure and temperature that the coupling will experience. Ensure that the selected coupling is rated to handle the expected pressure and temperature levels without failure or deformation.
3. Torque Requirements: Calculate the required torque capacity based on the power transmission needs of your system. Choose a coupling that can handle the anticipated torque while considering safety factors.
4. Misalignment Tolerance: Evaluate the potential misalignments that may occur between the shafts in your system. Choose a coupling that offers sufficient misalignment tolerance to accommodate these variations without imposing excessive stress on the equipment.
5. Vibration and Shock: Consider the level of vibration and shock the coupling will experience during operation. Select a coupling that can dampen vibrations and absorb shocks to protect the system components and ensure stable performance.
6. Installation and Maintenance: Assess the ease of installation and maintenance requirements of the coupling. A well-designed coupling should be easy to install, inspect, and maintain, reducing downtime and maintenance costs.
7. Environmental Factors: Take into account the environmental conditions in which the coupling will operate. Factors such as exposure to moisture, chemicals, dust, or extreme temperatures may affect the choice of coupling materials and coatings.
8. Space Constraints: Consider the available space for installing the coupling. Some applications may have limited space, necessitating the use of compact or low-profile couplings.
9. Coupling Type: Based on the above considerations, choose the most suitable coupling type for your specific fluid handling needs. Consider options such as jaw couplings, disc couplings, fluid couplings, gear couplings, or other specialized couplings based on your application requirements.

It’s essential to consult with coupling manufacturers or industry experts if you have specific or challenging application requirements. They can provide valuable insights and recommendations to ensure you select the right hydraulic coupling that meets your fluid handling needs and maximizes the efficiency and reliability of your system.

editor by CX 2024-04-02