Category Archives for Actuators
(1) External type: This motor is simple, compact, lightweight, inexpensive, and capable of relatively high-speed rotation. It has a cross-sectional structure similar to that of gear pumps. It requires a drain to be installed for oil seal protection. (2) Internal … Continue reading
(1) Models (JIS B 8367: 1999 Mounting dimensions for hydraulic cylinders) ®7HT: For 7 MPa (1 015 psi), Rectangular Cover, Tie-rod ©10HS: For 10 MPa (1 450 psi), Built-in Cylinder ©10HT: For 10 MPa (1 450 psi), Rectangular Cover, Tie-rod … Continue reading
This cylinder uses a multistage tube as a piston rod to obtain a long stroke. It is useful for pistons requiring a more compact housing. Single and double acting types are available.
This is a cylinder that pushes the piston in one way (extending direction). The piston rod is returned by gravitation or a mechanical force.
This is a standard cylinder that produces reciprocating motion. It is available in single and double rod types. Fig. 10.1 shows the single rod cylinder. This cylinder is provided with a cushion mechanism, which uses a cushion sleeve to close … Continue reading
There are some applications in which continuous rotation is not needed. Two examples are industrial mechanisms performing pick-and-place operations and heavy-duty, large-payload robots. Vane motors with one or two vanes are used for limited-rotation applications. The single-vane unit can rotate … Continue reading
Typical construction for cylinders used in industrial applications is shown in Fig. 7.18. The seals are a key feature, as is the rod wiper. Dirt from the environment settles on the rod and will ingress into the hydraulic system if … Continue reading
Standard cylinders are not designed to take a side load. Care must be taken to ensure that binding does not occur during extension or retraction. A designer will use one of the mounting methods shown in Fig. 7.15 to prevent … Continue reading
Cylinder manufacturers typically classify their products as heavy duty, medium duty, and light duty. Pressure ratings up to 6000 psi are available. Some manufacturers build an agricultural-grade cylinder. These cylinders are satisfactory for applications where annual use is limited. A … Continue reading
The types of cylinders are: Double-acting (Fig. 7.14a) Single-acting, spring return (Fig. 7.14b) Double-rod (Fig. 7.14c) Tandem (Fig. 7.14d) Telescoping (Fig. 7.14e) The double-rod cylinder has the same annular area on both sides, so it develops the same maximum force … Continue reading