Couplings, as core mechanical components connecting two shafts and transmitting torque and motion, are primarily classified based on their core working principle, compensation capability, and structural characteristics to meet the needs of different mechanical systems for transmission accuracy, torque rigidity, vibration suppression, and deviation compensation.
The core classifications are as follows:
Flexible Couplings: These transmit torque and absorb vibration and shock through non-metallic elastic elements.
Representative Series: Aluminum flexible perforated couplings (MH series), parallel tangential flexible couplings (PXQ series).
Features: Excellent buffering, vibration reduction, and electrical insulation properties; capable of compensating for certain axial, radial, and angular misalignments; suitable for general transmission applications with low to medium torque, vibration, or requiring soft starts.
Non-metallic Diaphragm Couplings: These use polymer diaphragms as elastic elements, combining high flexibility with ease of maintenance.
Representative Series: High-torque single diaphragm couplings (SMP series).
Features: Compact structure, maintenance-free, excellent angular misalignment compensation capability and electrical insulation; suitable for applications with medium torque, requiring electrical isolation, or corrosive environments.
Metal diaphragm couplings: These use high-strength alloy diaphragm assemblies to transmit torque and are backlash-free flexible couplings.
Representative series: Single diaphragm couplings (SMP series) and double diaphragm couplings (DMP series).
Features: Extremely high torsional rigidity, transmission accuracy, and fatigue life; can compensate for large axial, radial, and angular misalignments; the double diaphragm structure offers even stronger compensation. They are the first choice for applications requiring precision transmission and zero backlash, such as servo motors and high-speed spindles.
Sliding block couplings: These compensate for misalignment through the sliding of a central sliding block (cross block).
Representative series: Cross couplings (SZHK series).
Features: Simple and compact structure; can compensate for large radial and angular misalignments, but usually has slight backlash; suitable for medium to low speed transmissions with large eccentricity or angular misalignment.
The coupling product system offers a complete coverage, ranging from general vibration damping and electrical isolation to high-precision, high-speed, and high-torque rigid transmissions. Users can select the most suitable type based on their system's accuracy requirements, torque, speed range, and shaft alignment deviation.
The nut seat is a key mechanical interface component connecting the ball screw nut to the worktable or slider. Its primary classification is based on manufacturing materials and core design characteristics, aiming to meet the differentiated needs for structural rigidity, weight, cost, and corrosion resistance in various application scenarios.
Core classifications are as follows:
Aluminum Nut Seats (e.g., BSG series)
Core characteristics: Made of aluminum alloy, offering lightweight construction, excellent corrosion resistance, and good machinability.
Application scenarios: Primarily used in applications sensitive to the weight of moving parts, requiring reduced inertia, and demanding high-speed response, such as non-standard automated equipment, lightweight gantry cranes, measuring instruments, and some semiconductor equipment. Its lightweight advantage helps improve system dynamic performance.
Steel Nut Seats (e.g., DSG series)
Core Characteristics: Manufactured from carbon steel or alloy steel, precision-machined and treated, possessing extremely high structural rigidity, load-bearing capacity, and wear resistance.
Application Scenarios: Primarily designed for demanding working conditions requiring heavy loads, high rigidity, and high precision. Examples include large CNC machine tools, stamping equipment, injection molding machines, and heavy industrial transmission systems. They ensure stable connections under heavy loads, effectively suppressing deformation and guaranteeing transmission accuracy and long-term stability.
The selection of nut seats is a crucial aspect of system design. Aluminum nut seats excel in lightweight and corrosion resistance, serving applications prioritizing speed and dynamic performance; while steel nut seats prioritize rigidity and load-bearing capacity, providing reliable assurance for heavy-duty, high-precision applications. Users must comprehensively weigh and select the appropriate type based on the equipment's load capacity, operating speed, precision requirements, and operating environment.
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