Oscillating Mountings
- Elastic suspension for screens and shaker conveyors
- Offers high dampening, long lifetime, and is overload proof
- Multiple Guided Shaker System (Crank Driven) solutions
- Multiple Free Oscillating Systems (Unbalanced Excitation) solutions
By virtue of their unique design, Lovejoy ROSTA rubber suspension units are well suited for guiding and linking a variety of vibrating and screening equipment. The jointed rubber spring assists the amplitudes to be transmitted to the actual oscillating equipment with a directional rotary rocking motion. Owing to the specific spring characteristic, the element also acts as a virtually non-wearing spring accumulator, and is therefore predestined for linking applications in resonance vibration systems. Due to its unique design neither shear nor bending stresses occur at the support points – guaranteeing above average life of the link rods.
Lovejoy ROSTA supplies standardized link rods, rocker arms, spring supports and universal joints for all kinds of shaking, conveying and screening machines with positive or freely oscillating drive systems. Lovejoy ROSTA oscillating mountings have proved their worth for decades in vibrating oscillating and rotating machinery in general process engineering.
Elastic brush and scraper suspension
Type AU (Oscillating Mounting)
- Maintenance-free elastic joints for suspending or supporting
- Mounted by fixing flanges; available with left or right handed threads
- Housings - die cast aluminum or spherioidal graphite cast iron; core – steel contstruction
- Applications include: conveying troughs, screens, sorters, and all devices excited
by eccentric drives or unbalanced motors with direct oscillations
Type AR (Oscillating Mounting)
- Maintenance-free elastic joints for similar purpose of AU, AS & AD types
- Distance between the centers can be freely chosen
- Housing - cast aluminum; core – aluminum profile
- Commercial circular tube (connecting 2 elements) must be supplied by customer
Type AS-P (Rocker Suspension)
- Maintenance-free elastic guide arms; same purpose as oscillating mountings type
AU
- Economic model; suitable for fixed distances between two bearings
- Housing and inner square – welded steel construction
- Core is equipped with fixing plates, similar to ones of the AU type
Type AS-C (Rocker Suspension)
- Maintenance-free elastic guide arms; same purpose as oscillating mountings type
AU
- Economic model; suitable for fixed distances between two bearings
- Designed to be frictionally engaged to the machine frame
- Housing – welded steel; core –aluminum profile
Type AD-P (Double Suspension)
- Used for suspending and supporting two-mass shaker systems
- Center point, for frame fixation, is the middle of the double rocker arm
- Mounted by means of fixating flanges
- Housing and inner square – welded steel construction
Type AD-C (Double Suspension)
- Used for suspending and supporting two-mass shaker systems
- Center point, for frame fixation, is the middle of the double rocker arm
- Designed to be frictionally engaged, similar to AS-C type
- Housing – welded steel; core –aluminum profile
Type DO-A (Rubber Suspension)
- Used as an elastic oscillating drive head or spring accumulator in natural frequency
shakers
- High dynamic stiffness, reliable, maintenance-free operation
- 4 hole inner core – enables eccentric rod or conveyor connections (with brackets)
- Housing – aluminum (up to size 45) or SC iron; core – light alloy
Type ST (Oscillating Drive Head)
- Flexible joints transmitting acceleration forces from eccentric drive to oscillating
machine part
- Operates free of play, silently, reliably, and without requiring maintenance
- Housing – aluminum, SC iron, or steel (size dependent); core – aluminum or steel
(size dependent)
- Right or left hand threads are available
Type AB (Oscillating Mounting)
- Maintenance-free elastic rockers for the support or suspension of freely oscillating
vibrating equipment, with a wide variety of designs and drive systems
- Assist driving forces in the conveying direction; assure good linear guidance
- Low natural frequency; exceptionally high insulation efficiency
- Great lateral stability prevents wobbling typical of helical spring mounts passing
resonant frequency
- Spheroidal graphite and/or aluminum construction (size based); stainless steel also
available
Type AB TWIN (Oscillating Mounting)
- Same basic characteristics as AB type, with twice the loading capacities
- Eminently suitable for mounting large-scale screen plant and screens including counter-oscillating
frames
- Single size (AB 50-2); may be combined with standard AB of the same size (AB 50)
- Mountings bolted directly at the spheroidal graphite iron feet to the screen and
support structure
Type AB-HD (Oscillating Mounting
- “Heavy Duty” version in the AB mount family
- Single size (AB-HD 50-2); offers 40% more load capacity compared to the AB TWIN
(AB 50-2)
- Ideal suspension for mining and aggregate screens working under variable charging
capacities
- Less sensitive to possible overload situations
Type AB-D (Oscillating Mounting)
- Budget “Price Breaker” among the freely oscillating mountings
- Similar characteristics to AB types; though much higher loading capacity
- Respectably low natural frequency; laterally stable
- Sufficient for applications not mounted on high screen platforms or structures
- Spheroidal graphite and/or aluminum construction (size dependant)
Type AU-DO (Universal Spring Rockers)
- Primarily developed for trough suspension in excited-chassis two-mass oscillating
systems (energetic amplification)
- Characterized by extremely low, hardly measurable residual force transmission
- Ideally suited for installation on steel scaffolding and false floors in processing
buildings
- Also highly suited for suspension of freely oscillating single-mass systems with
an unbalanced motor drive; or trough guide and spring accumulator for crank-driven
oscillating systems
Type AK (Universal Joint Type)
- Maintenance-free elastic joints which can be moved in any direction
- Used as universal joint for mounting or suspending gyratory screens, screening tables,
tumbling oscillators, sorters, and screening machines positively driven my eccentrics
or freely oscillating with an unbalanced drive.
- Construction material is size dependant
Type AV (Oscillating Mounting)
- Maintenance-free elastic joints
- Designed for guiding circular motions of hanging screens such as gyratory sifters
and screens in flour mills, chemical processing plants and paper mills
- Rubber inserts of these are larger than other ROSTA elements - intensively absorbing
vibrations to better protect building structures and ceilings
- Cast aluminum or iron housing; cores – aluminum profile