SUBSTANCE: gear mechanism comprises rod with outer thread, coupling fitted on said rod and coupling revolution drive appliances. Coupling has chamfer made on thread start and constant-diametre section with axial length corresponding to, at least, one thread. Chamfer features conical surface with rotation symmetry about coupling central axis. Said conical surface and central axis make angle varying from 2° to 35°, preferably, from 5° to 15°.
EFFECT: reduced vibration in mechanism.
10 cl, 4 dwg
The technical FIELD
The present invention relates to a transmission mechanism, preferably for a low-speed elevators, which contains a rod with an external thread, a clutch that is installed on the rod, and means for the rotation of the coupling. The invention also relates to the coupling, which is included in the transmission mechanism.
The LEVEL of TECHNOLOGY
It is well known that the so-called low-speed elevators have the transmission mechanism, which includes at least a rod with external thread, suspended accordingly at its upper end while the lower end of the rod free. Rotation of the rod is locked. On the rod planted in the clutch, and the clutch is attached to a tool designed for its rotation, and the tool is typically a motor. When rotation of the sleeve moves relative to the rod in its longitudinal direction.
Usually the thread is cut on the rod rolling, and this means that areas that form the depression thread, have very tight tolerances on width. However, this does not apply to parts of the rod, which form the top of the thread. The outer diameter of the rod, which is determined by the peaks of the thread, is not perfectly round, and on the periphery of the thread may be a notch or the like. This means that the coupling for upset" outer diameter of the rod, and since the rod is freely suspended, i.e. in the area of the lower end of the rod there is no fastening, the rod will vibrate or under certain circumstances even to have a tendency to commit the free oscillations. Below with reference to the drawing describes the main design principle of this known mechanism.
OBJECTIVES AND features of the INVENTIONS
The main objective of the present invention is to create a transmission mechanism and a clutch, a member of the specified mechanism, the vibration generated in the specified mechanism, substantially reduced compared with the prior art.
An additional objective of the present invention is the reduced ability of the threaded rod and/or the coupling member of the mechanism, for the perfecting of the free oscillations.
Another objective of the present invention is that the replacement needed only part of the mechanism made in accordance with the prior art.
At least the main objective of the present invention is achieved by means of the mechanism described in the attached independent claims. Preferred embodiments of the invention are described in dependent clauses.
BRIEF DESCRIPTION of DRAWINGS
Below with reference to the accompanying drawings describes a sample known in the anti-shudder performance techniques, as well as the preferred embodiment of the present invention on the drawings:
Figa schematically depicts the transmission mechanism made according to the prior art;
Figv depicts a section along the line B-B, shown in Figa, where for clarity the threaded rod not shown in section;
Figure 1 schematically depicts how the mechanism made according to the present invention, integrated in the lifting device;
Figure 2 depicts the transmission mechanism made according to the present invention;
Figure 3 depicts a section along the line III-III shown in figure 2, where for clarity the threaded rod not shown in section; and
Figure 4 depicts a longitudinal section of the coupling, which is part of the mechanism made according to Figure 2.
A DETAILED DESCRIPTION of KNOWN MECHANISM AND the PREFERRED OPTION of carrying out the INVENTION
The transmission mechanism according to the prior art depicted in Figa, contains a rod S with an external thread and installed the clutch M transmission Mechanism functions in such a way that the clutch M is rotated while the rotation of the rod S is locked. Clutch M can be installed on part of the Elevator cab or platform, which makes a vertical movement. The principle of this movement is described below bol is e detail with reference to Figure 1. Since the outer periphery of the rod S is not a perfect circular cylinder when the clutch M "rises" by rod S will be fluctuations. These oscillations are initiated when the initial parts of the thread located at the respective ends of the coupling M, in contact with portions of the rod S, which they surround, during the relative movement between the sleeve M and the terminal S. On FIGU best seen that the diameter of the thread of the coupling M is essentially constant throughout the coupling in the longitudinal direction of the rod S. This means that if the roughness of the outer periphery of the rod S interacts with the initial plot thread of the sleeve M, the rod S will be fluctuations, and it is possible that these fluctuations will cause the free oscillation of the rod S and/or clutch PM
Lifting device, schematically depicted in figure 1, for example, installed in a low-speed Elevator, contains a rod 1 with an external thread and the sleeve 3, which is installed on the rod 1. The rod 1 is suspended in the area of its upper end (not shown), and its rotation is blocked. The lower end of the rod 1 is not fixed, that is, the terminal 1 is hanging freely. On the clutch 3 is the first pulley 2. In the lifting device shown in figure 1, contains the primary motor 4, which is preferably an electric motor. N. the output shaft of the primary motor 4 has a second pulley 6. Around both pulleys 2, 6 are two driven belt 8.
The clutch 3 is suspended for rotation in the frame 10 or similar device, and rotating in limbo is achieved by means of the ball bearing 11. As follows from Figure 1, the motor 4 is also suspended in the frame 10.
The device, shown schematically in figure 1, essentially works in such a way that the electric motor 4 by means of the pulleys 2, 6 and drive belts 8 rotates the clutch 3. This moves the clutch 3 with respect to terminal 1, since the rotation of the rod 1 is locked. Naturally, the movement of the clutch 3 up or down relative to the rod 1 depends on the direction of rotation of the clutch 3.
Thus, the transmission mechanism made according to the present invention and shown in more detail in figure 2 - Figure 4, contains a rod 1 with an external thread, the sleeve 3 mounted on the rod 1, and 2, 4, 6, 8, intended for rotation of the clutch 3, and figure 2-Figure 4 mentioned means 2, 4, 6, 8 are not shown. A suitable speed range clutch 3 with respect to the present invention is 200-3000 rpm
Figure 4 separately shows the coupling 3, which is part of the mechanism made according to the present invention, this drawing shows a longitudinal section of the clutch 3. Figure 4 shows the Central axis C-C coupling 3, to the which also is the axis of rotation of the specified clutch. From Figure 4 it is seen that the sleeve 3 is threaded 5, which runs along the main part of the height H of the coupling 3, i.e. along its length in the longitudinal direction of the rod 1. The middle portion 7 of the thread 5 has a constant diameter, while the screw threads 5 has a bevel 9, made with two parties at the initial parts of the thread. Chamfer 9 have the shape of conical surfaces with symmetry of rotation relative to the Central axis C-C. To determine the boundary of the chamfer 9 figure 4 shows the reference line R parallel to the Central axis C-C. the Angle that the chamfer 9 forms with the line R, denoted in figure 4 as α, and the value of this angle must be in the range of 2°≤α≤35°, preferably the value of the specified angle is in the range of 5°≤α≤15°.
In figure 4 the maximum diameter D1 of the chamfers 9 and the diameter D2 of the thread 5. Between these diameters is the relationship D1≥D2.
Figure 4 marked the height H of the coupling 3, as well as the sizes and HB, which determine the length of the chamfer 9 relative to the height of the clutch 3. In the framework of the present invention is not necessarily to comply with the equality (=HB, that is, to chamfer 9 have the same height.
According to the present invention, the height H of the coupling 3 must be in a certain ratio with size ON, HB and pitch 5, while in figure 4 the specified step is designated as R. casaes the options for performing clutch 3, depicted in Figure 4, then N≥+HB+R. in Addition, it is assumed that the area 7 having a constant diameter that is at least one thread, which corresponds to the length of the specified portions 7 in the axial direction, is equal to the thread pitch 5. From Figure 4 it is seen that the section 7 actually has a longer axial length. For the purpose of illustration, and not limitation may be mentioned that the axial length of the section 7 of constant diameter is preferably (4-8)R, preference is given to the value OF 6, where P is the thread pitch. From a functional point of view, the objective of section 7 of constant diameter is in the stabilization of the clutch 3 relative to the rod 1, that is, the region 7 prevents the oscillation of the clutch 3 relative to the rod 1.
When considering Figure 3 it is clear that when a certain area of terminal 1 communicates with one inlet pipe thread couplings 3, this interaction will be smoother and will result in fewer fluctuations, if the initial parts of the thread are chamfers 9.
The obvious advantage of the present invention is that in the future, you can use the terminal 1 of the type that was previously used. Thus, the sleeve 3 made according to the present invention compensates for the implementation of the rod 1 is not perfectly round.
The POSSIBLE MODIFICATION of the INVENTION
In the above embodiment, the clutch 3 at its both ends are chamfered. However, in the framework of the present invention is allowed to clutch had only one chamfer on one end. If it is assumed that the clutch is made of only one top facet, in accordance with Figure 4, the following ratio: N≥+P.
1. The transfer mechanism is preferable for low-speed elevators, containing the rod (1) with an external thread and coupling (3), mounted on the rod (1), coupling (3) has a chamfer (9), performed on the primary plot thread, characterized in that it has means for the rotation of the clutch (3)and sleeve (3) has a section (7) of constant diameter, the axial length of which corresponds to at least one coil (R) thread and chamfer (9) has the shape of a conical surface with symmetry of rotation relative to the Central axis (C-C) coupling (3)with the specified conical surface in an arbitrary plane, which passes through the Central axis (C-C), forms with this axis (C-C) angle (α), the value of which is in the values area 2°≤α≤35°, preferably in the field of values of 5°≤α≤15°.
2. The mechanism according to claim 1, characterized in that the axial length of the section (7) of constant diameter corresponds 4-8 one thread.
3. The mechanism according to claim 1, characterized in that the IUF is a (3) has a chamfer (9), performed on both the initial parts of the thread.
4. The mechanism according to claim 1, characterized in that the sleeve (3) has a length/height (H) in the longitudinal direction of the rod (1), threads (5) of the clutch (3) has a step (P), length (/HB) chamfer (9) in the direction of the height of the clutch (3) is determined by the ratio N≥/HB+R.
5. The mechanism according to claim 3, characterized in that the sleeve (3) has a length/height (H) in the longitudinal direction of the rod (1), threads (5) of the clutch (3) has a step (P), length (HB) chamfers (9) in the direction of the height of the clutch (3) is determined by the ratio N≥+HB+R.
6. Coupling (3)included in the transmission mechanism, mounted on the rod (1) with an external thread and having a chamfer (9) on one primary plot thread, characterized in that it has a plot (7) a constant diameter, the axial length of which corresponds to at least one coil (R) thread and chamfer (9) has the shape of a conical surface with symmetry of rotation relative to the Central axis (C-C) coupling (3)with the specified conical surface in an arbitrary plane, which passes through the Central axis C-C), forms with this axis (C-C) angle (α), the value of which is in the values area 2°≤α≤35°, preferably in the field of values of 5°≤α≤15°.
7. Coupling (3) according to claim 6, characterized in that the axial length of the section (7) constantly what about the diameter corresponds 4-8 one thread.
8. Coupling (3) according to claim 6, characterized in that both the initial parts of her thread has a chamfer (9).
9. Coupling (3) according to claim 6, characterized in that it has a length/height (H) in the longitudinal direction of the rod (1), threads (5) of the clutch (3) has a step (P), length (/HB) chamfer (9) in the direction of the height of the clutch (3) is determined by the ratio N≥/HB+R.
10. Coupling (3) according to claim 8, characterized in that it has a length/height (H) in the longitudinal direction of the rod (1), threads (5) of the clutch (3) has a step (P), length (HB) chamfers (9) in the direction of the height of the clutch (3) is determined by the ratio N≥+HB+R.
SUBSTANCE: linear actuating device consists of slide nut and leading screw that are performed with the possibility of axial movement relative to one another between the first and the second points that define stroke length at actuating the corresponding element by means of transmission. The device also includes incremental position sensors, namely at least two Hall sensors or reed switches aimed for position defining. In order to define the position initialisation procedure takes place. It provides nut and leading screw shift from the first point at leading screw or nut to the second point at leading screw or nut. The quantity of pulses from incremental position sensors are registered as stroke length index. Then the position is defined by the quantity of pulses. The aforesaid device is active before, during and after engine operation.
EFFECT: extension of operation capabilities.
9 cl, 7 dwg
FIELD: machine building.
SUBSTANCE: invention relates to screw mechanisms, particularly to nuts of roller screw pair. Nut contains casing, allowing groove, drawn along the central axis, and radial openings. In radial openings there are installed rollers of longitudinal loading with axial rotation, transverse central axis of casing. Into mentioned openings with ability of rotation there are installed rollers of longitudinal loading. Additionally rollers of longitudinal loading are installed with ability of shift relative to casing along its pivot pin in answer to changing of influencing on it from the side of central loading axis. Additionally nut contains united system of load hydraulic compensation of rollers of longitudinal loading.
EFFECT: increasing of life cycle of screw mechanism, reduction of requirements to accuracy of manufacturing, reduction of unevenness of wear and improvement of maintainability.
15 cl, 8 dwg
FIELD: engines and pumps.
SUBSTANCE: proposed drive incorporates a motor, a housing, a gear, a gear wheel, bearings and a nut with a screw representing a partially threaded rod. The plain bearings are rigidly fitted in the housing while the aforesaid rod is arranged to translate and rotate. The gear wheel is rigidly fitted on the said rod to get into mesh with the assembly of widened gear-rim idlers. The aforesaid nut is rigidly fitted in the housing and is furnished with the device designed to take up axial and radial play in the threaded pair.
EFFECT: higher drive rigidity, accuracy and stability in IN and OUT state, simple design and ease of manufacture.
4 cl, 1 dwg
SUBSTANCE: nut-hinge incorporates a leader, a nut and nut-holder. The nut is made up of two half-nuts fastened together by fixing screws fitted into elongated holes. The nut-holder representing a bracket covering the leader is arranged between half-nuts. The bracket out-of-centre holes house the balls interacting with half-nuts end faces and transmitting the motion by the bracket shoulder to the actuator arranged on the closed guides.
EFFECT: expanded performances.
SUBSTANCE: self-aligning flexible screw pair contains a blind-hole nut, a nut holder in the form of a cut ballpoint pin with a cross-like slot and bearings. The bearings are fitted on the nut holder by means of a yoke incorporating a plate hingedly pressed by means of a pivoting screw and a nut, the bearings being arranged in mutually perpendicular positions on the axles. The nut is made up of half-nuts jointed by a flexible element. One of the half-nuts has a blind hole to interact with the cut ballpoint pin. The second half-nut is furnished with flat side surfaces for interaction with the bearings. The flexible element is furnished with crimps and can be arranged between the half-buts in sets made up of several pieces. The flexible element or elements are fastened on the half-nuts by standard fasteners.
EFFECT: expanded performances and smaller sizes.
FIELD: mechanical engineering.
SUBSTANCE: gear comprises screw and nut. The threaded parts of the screw and nut are made of a ferromagnetic material. The nut is provided with a passage for supplying compressed fluid from an external source to the radial space defined by the first aerostatic bearings. The gear is provided with the differential nut interposed between the nut and screw. The differential nut is provided with threads of different pitch on the outer and inner sides. The thread on the outer side engages the nut, and the thread on the inner side engages the screw. The grooves of the thread of the differential nut is filled with a solid nonmagnetic material. The parts of the thread made of ferromagnetic materials are provided on the inner and outer sides of the magnetic circuits and represents discontinuous screw lines. The faces of the magnetic conductors face each other. The ring permanent magnet whose magnetization axis is oriented along the axis of the screw. The second aerostatic bearings are set in the recesses of the magnetic circuits inside the differential nut at its end and define radial space between the screw and differential nut. The through by-pass in the body of the differential nut is used for supplying compressed fluid from the space between the nut and differential nut to the radial space between the screw and differential nut.
EFFECT: enhanced precision and reduced sizes.
3 cl, 3 dwg
SUBSTANCE: invention relates to load handling equipment and serves to transfer cargoes and people on work platforms from one level onto another. Proposed jack comprises chassis on front and rear wheels, telescopic boom mounted on lift and turn frame of load bearing base arranged on the chassis between front and rear wheels. Boom, whereto suspended is work box-like platform, is coupled with lift and turn frame by lift hydraulic cylinder to rest on thrust arranged at the front of aforesaid bearing base in transport position. Said transformable platform consists of two sections. Lower section has bottom and sidewalls. Upper section has sidewalls. Note here that said sections are jointed together by side struts 44 with hinge mechanism 35 and retainers 40 to allow upper section to turn through 180° and be folded below lower section.
EFFECT: reduced sizes in transport position.
7 cl, 6 dwg
SUBSTANCE: invention relates to lifting-and-conveying machines and can be used for lifting operator to required height in performing, construction, mounting and servicing jobs. Hydraulic jack comprises pump station, telescopic mast made up of hydraulic jack with its rod arranged vertically on bearing base, cargo-and-passenger platform secured at hydraulic jack case bottom part and platform guard. Aforesaid pump station is also secured onto hydraulic cylinder case bottom part and furnished with main or standby drive with pedal pump.
EFFECT: simple design, reduced weight and ease of manufacture.
2 cl, 1 dwg
SUBSTANCE: invention relates to machine building and can be used in various industrial branches. Proposed suspension comprises support, load handling mechanism fitted thereon on axle of semi-axle and load handling mechanism balancing device to equalise it relative to said axles or semi-axles. Said balancing device represents a bell crank arranged on load handling mechanism pivoted thereto to interact with aforesaid support and its axle or semi-axle by one and opposite arms of bell crank, respectively.
EFFECT: balancing load handling mechanism with displaced center of gravity of handled cargo.
3 cl, 7 dwg
SUBSTANCE: proposed invention relates to material handing equipment and can be used in various industrial branches. Proposed lifting device comprises carcass accommodating movable frame that can move vertically, frame drive and frame locking devices. Movable frame drive comprises winch with cargo sling, movable unit with movable frame drive steel ropes and winch motor cut-out unit. Winch cargo sling is linked with winch motor cut-out unit via movable unit. Aforesaid carcass represents top and bottom frames inter-jointed by vertical rails.
EFFECT: minimum deviation from horizontal position in upward travel, rigid locking of movable bearing surface at reset level.
5 cl, 2 dwg
FIELD: transport, lifting devices.
SUBSTANCE: proposed load lifter comprises beam with toothed rack mechanism, platform (12), and at least one drive unit (100) mounted on aforesaid beam to control vertical platform travel along said beam. Said drive unit comprises multiple modular elements comprising at least one drive unit (101), at least one top roller box (102) and at least one bottom roller box (103). Modular interchangeable elements incorporate coupling elements mating those of the other modular element to allow reverse coupling of aforesaid modular elements.
EFFECT: convenient readjustment.
15 cl, 13 dwg
SUBSTANCE: invention relates to lifting equipment. Aerostatic lifter comprises flying lifting vehicle connected with surface power supply and control device via load-carrying electric cable (3) wound on the drum mounted on self-propelled platform. Flying-lifting vehicle comprises undercarriage (6), frame (7), and carcass (8) fitted on the frame to accommodate rotors (9) and stators (10) of rotor drives. Aforesaid self-propelled platform can carry undercarriage of aforesaid flying vehicle. Fixed carcass (8) accommodates a pair of coaxial rotors (9) running in opposite directions driven by drive stators with their armatures (11) mounted on frame (7). Aerodynamic surfaces (13) are arranged in inductive airflow zone to rotate driven by motors about their horizontal axes (15), when controlled from the surface power supply device via load-carrying electric cable (3). The latter device allows controlling flying vehicle horizontal and vertical directions.
EFFECT: higher mobility and expanded application range.
6 cl, 3 dwg
SUBSTANCE: proposed device comprises outer suspension and cargo orientation system. The outer suspension incorporates crosspiece with hauling cables furnished with cargo grippers. The crosspiece is coupled, via two converging links, with flight vehicle lock. The cargo orientation system incorporates two drives mounted on fuselage. Every drive is connected, via flexible link and deflecting block, with one end of the said crosspiece. To compensate for flexible link length variation in flight, the orientation system additionally comprises, for aforesaid every drive, lever pivoted to the fuselage. The said lever accommodates additional deflecting unit fitted on one end of the lever and enveloped by the flexible link and is coupled with spring-loaded appliance arranged on the fuselage. The axle of one of the said deflecting units on every lever can be aligned with the lever axis of rotation. The other deflecting is fixed on the lever free end. Note that both levers can be spring-loaded by means of single acting power cylinders, or by torsions.
EFFECT: increased range of helicopter operation in civil and erection works, higher safety and easier crew operation.
4 cl, 2 dwg
SUBSTANCE: docking device contains "П"-shaped portal in form of two posts with cross-piece secured on tops, polyspasts of cargo hoisting device installed in portal posts, load grippers secured on free ends of flexible elements of polyspasts. Docking device has arch and second portal, portals are wheeled and are connected with each other at top by longitudinals. Arch consists of cross-piece and two columns attached to it, and it is mounted so as to be movable along longitudinals, on arch columns polyspasts of cargo hoisting device are installed with load grippers secured on free ends of flexible elements of polyspasts. On cross-pieces of portal with polyspasts and on arch capable of turning in vertical transversal plane there are installed two levers with block on each of them, flexible elements of polyspasts with load grippers secured are passed through blocks. Each lever is equipped with rotary mechanism.
EFFECT: increase in workability during lifting and shifting in docking of articles.
FIELD: technological processes.
SUBSTANCE: incrustation imitation is an article with front surface including substrate surface areas and picture formed by front surfaces of decorative elements. Each element in face-work has a basically prism-shaped base. At least one element is decorative and has at least one head in the form of embossed nose with face surface on the upper base basement. Lower base basements in the face-work lie in the same plane, side facet of each base contacts at least one another base, the substrate is solid, and elements are fixed in the article by substrate material. Method of incrustation imitation manufacturing involves composition of a picture out of face surfaces of decorative elements and element fixation in the substrate. Decorative elements with basically prism-shaped base and at least one at least one head in the form of embossed nose with face surface on the upper base basement are used, the nose having a face surface. Also space elements consisting of bases without heads are used in face-work. Lower base basements are placed in the same plane, face surfaces form a picture model, and each base is put tightly to the adjoining bases, so that adjoining base side facets abut each other. Then an imitation is formed by positioning bases inside the imitation and face element surfaces on the surface, and the substrate is cast.
EFFECT: significantly increased picture exactness and durability.
9 cl, 7 dwg
SUBSTANCE: hydraulic ram consists of a set of power hydraulic rams arranged on a frame, the spaces, via common manifolds, communicating with the pumping station. Hydraulic ram subpiston and superpiston spaces are connected in pairs with the pressure and drain manifolds via controlled gate valves to shut off one or several sets of the said hydraulic rams. Rulers and rods with a pointer are arranged on a fixed and movable hydraulic ram parts, respectively. Air feed and return manifolds communicate with the hydraulic ram upper spaces and air feed control gate valves. Blocks are arranged on along the reactor cover circumference to facilitate remote control over the reactor cover jointing with the grip in limited working space and to add to radiation safety. The pan with interlocks is arranged in the gap between the hydraulic ram set and the reactor cover lower surface, attached thereto.
EFFECT: load lifting without skew, measurement of the load motion regularity, draining water from hydraulic ram spaces and higher radiation safety.
4 cl, 5 dwg
FIELD: launch vehicle.
SUBSTANCE: invention relates to ground devices to swing service platforms from side of launch vehicle. According to invention, self-release lock of device is arranged on outer end of support boom, being made for opening under gravity and adjustable in length and angle of turning in horizontal plane. Said lock is provided with support detachably connected with socket on side of launch and adjustable in height. Device is furnished with gate movable horizontally with possibility of locking and release to prevent unauthorized self-opening of lock and connected, by flexible member through reverse-action pulley block furnished with tensioner, with inner end of support boom. Tensioner is placed inside service tower. Support of self-release lock is made ball-type, for fitting in support socket on side of launch vehicle. Said socket has cone-like space with ball-shaped bottom. Support socket on side of launch vehicle is provided with spring-loaded rod-indicator of position of ball support fitted in socket.
EFFECT: improved convenience in use owing to moving of support boom from side of launch vehicle at beginning of movement of launch vehicle.
3 cl, 7 dwg