RU2271328C1 - Lifter - Google Patents

Lifter Download PDF

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Publication number
RU2271328C1
RU2271328C1 RU2004120059/11A RU2004120059A RU2271328C1 RU 2271328 C1 RU2271328 C1 RU 2271328C1 RU 2004120059/11 A RU2004120059/11 A RU 2004120059/11A RU 2004120059 A RU2004120059 A RU 2004120059A RU 2271328 C1 RU2271328 C1 RU 2271328C1
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RU
Russia
Prior art keywords
load
drive
rollers
rotation
rod
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Application number
RU2004120059/11A
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Russian (ru)
Inventor
Алексей Иванович Карпенков (RU)
Алексей Иванович Карпенков
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Алексей Иванович Карпенков
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Priority to RU2004120059/11A priority Critical patent/RU2271328C1/en
Application granted granted Critical
Publication of RU2271328C1 publication Critical patent/RU2271328C1/en

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Abstract

FIELD: handling equipment.
SUBSTANCE: lifter has drive adapted for rotation of drive rollers and equipped with at least one drum mounted within casing, and load bearing bar positioned in axial opening of drum. Drum is connected through said transmission with engine for rotation within casing around axis of load bearing bar embraced thereby. Said drum is positioned for restricted axial displacement relative to casing. Axes of drive rollers have at their ends pivot joints mounted within drum so as to prevent axial displacement thereof relative to drum. One of pivot joints of pin of each drive roller is positioned for radial displacement relative to axis of load bearing bar and other pivot joint is positioned for displacement in curvilinear path and for synchronous restricted rotation of axes of drive rollers so as to be declined from position wherein said pins are in parallel with axis of load bearing bar, with drive rollers being biased to said bar at any instant of such rotation by means of controlled drive. On said rotation, axes of drive rollers are arranged in planes extending in parallel with axis of load bearing bar. Lifter is equipped with drives for altering biasing force of drive rollers applied to load bearing bar in proportion with weight of load to be handled and with at least one guiding bar for cooperation with guiding rollers. Counterbalance placed within cavity of load bearing bar is connected through flexible binders and pulleys with casing for balancing weight of casing and loading platform.
EFFECT: increased service life of lifter.
3 cl, 9 dwg

Description

The invention relates to lifting devices and can be used for lifting people and goods in residential and industrial buildings.
A known elevator comprising a housing, fixedly mounted parallel to a hollow, circular cross-section of a load-carrying and guide rod, a loading platform connected to a case containing two collet clamps, worn with their axial holes on a load-bearing rod, a hydraulic drive of the collet clamps and a control system, moreover, on the case and the loading platform, guide rollers in contact with the guide rod are reinforced. The control system provides alternate triggering of collet clamps. The work of the clamps is accompanied by their axial displacement relative to the load-carrying rod. This leads to the movement of the body of the cargo platform along the load-carrying rod [1].
The lack of a lift in the presence of sliding friction between the working surfaces of the collet clamps and the load-bearing rod. Significant friction and the lack of a counterweight that can reduce the inhibitory effect of gravity require a powerful hydraulic drive. In addition, slippage characteristic at collet clamps at high contact pressures leads to significant wear of both the collet clamps and the load-bearing rod. This reduces the lifespan of the lift.
The disadvantage of this lift is that the contact pressure developed by the color clamps is constant and does not depend on the weight of the load lifted. Under these conditions, the wear of the collet clamps and the load-bearing rod does not decrease with low load and idle movements of the elevator. It also reduces the lifespan of the lift.
A known elevator comprising a housing, parallel-mounted, fixedly mounted round carrying section with screw thread and a smooth rod guide, a loading platform connected to the housing containing a nut coupled to the load-carrying rod, can be rotated from the drive located in the housing with limitation of its axial movement relative to corps. The elevator contains guide rollers mounted on the hull and the loading platform in contact with the guide rod. When the nut rotates from the drive, it moves along the axis of the load-carrying rod, dragging along the body with a cargo platform mounted on it [2].
The disadvantage of this lift is that its operation is accompanied by energy-intensive sliding friction. Bringing the nut into rotation before lifting the load requires overcoming significant rest friction forces. This requires the use of a drive and starting equipment of high power.
The disadvantage of the lift is that it does not contain a counterweight to compensate for the inhibitory effect of weight loads. This additionally increases the required power of the drive and starting electrical equipment.
The closest analogue is a hoist comprising a housing of at least one hollow, circular cross-section, a load-carrying rod, a loading platform connected to the housing, drive rollers pressed against the outer surface of the said rod, a drive of rotation of the drive rollers mounted on the housing, including an engine and mechanical transmission, guide rollers mounted on the body and cargo platform [3].
A disadvantage of the known lift is the inconvenience of operating the lift and an increase in the load on the drive, starting electric equipment of the elevator with increased power.
The technical result of the claimed invention is to improve ease of use, reduce the required drive power and starting electrical equipment, increase the durability of the lift.
This technical result is achieved by the fact that in the elevator containing the housing, at least one hollow, circular cross-section, a load-carrying rod, a loading platform connected to the housing, drive rollers, pressed against the outer surface of the said rod, mounted on the housing drive rotation of the drive rollers, including a motor and a mechanical transmission, as well as guide rollers mounted on the housing and the loading platform, the drive of rotation of the drive rollers is equipped with at least one mounted in the bar housing a ban, in the axial hole of which a load-carrying rod is located, the drum is connected through the aforementioned gear to the engine for rotation in the case about the axis of the load-bearing rod covered by it, and is also mounted with the possibility of limited axial movement relative to the case, the axes of the drive rollers have hinges at their ends mounted in the drum with the possibility of eliminating their axial displacement relative to the drum, while one of the hinges of the axis of each drive roller is mounted with the possibility of radial displacement relative to the axis of the load-bearing rod, and the second hinge is mounted with the possibility of moving along a curved path and with the possibility of synchronously limited rotation of the axes of the drive rollers to deviate from the position of the parallel axis of the load-bearing rod while maintaining at any time such a rotation of the pressure of the drive rollers to this rod through a controlled drive, moreover, the axes of the driving rollers with the said rotation are located in planes parallel to the axis of the load-carrying rod, the hoist is equipped with drives for changing efforts to press the drive rollers against the load-bearing rod in proportion to the weight of the transported cargo and at least one guide rod for interaction with the guide rollers, and in the cavity of the load-bearing rod there is a counterweight connected by flexible couplings and blocks to the body to balance the weight of the hull and the loading platform .
On the counterweight, rollers are fixed with axes of rotation perpendicular to the axes of the load-carrying rods and pressed against the surface of the cavity of the latter.
Rollers having rotation axes perpendicular to the axles of the load-carrying rods and in contact with the outer surface of said rod are fixed to the housing.
The design of the hoist allows, before starting the movement of the hoist, to provide a rolling movement of the driving rollers at the beginning of the circle on the surface of the load-carrying rod, and then, tilting them along a helix with a smooth increase in stroke. This reduces the required starting torque, drive power and starting electrical equipment.
The counterweight eliminates the energy consumption to overcome the forces of gravity, and its rollers - energy-intensive friction sliding counterweight on the walls of the cavities of the load-bearing rods. All this will further reduce the required drive power and starting electrical equipment.
The proposed elevator is equipped with a load size sensor located on the cargo platform, as well as actuators controlled by the aforementioned sensor, for changing the pressure of the drive rollers against the load-carrying rod in proportion to the weight of the transported cargo. This will reduce the pressure of the drive rollers in contact with the load-bearing rod, reduce their wear at low load and idle and, therefore, will increase the durability of the lift.
Increasing the lifespan of the elevator also ensures that rollers having rotation axes perpendicular to the axles of the load-bearing rods in contact with the outer surface of the load-bearing rods and preventing distortions of the drive rollers and their increased wear are mounted on its housing.
Figure 1 shows a General view of the lift. Figure 2 is a section aa in figure 1. Figure 3 is a General view of the housing. Figure 4 is a section aa in figure 3. In Fig.5 is a view of B in Fig.3. Figure 6 is a view In figure 3. In Fig.7 is a view of G in Fig.3. On Fig - section DD in Fig.3. In Fig.9 is a view of E in Fig.3.
The hoist comprises parallel-mounted, fixedly mounted load-bearing 1 and guide 2 rods, a loading platform 3 connected to the housing 4, drive rollers 5, a drive 6 of driving rollers located in the housing, comprising an electric motor 7, a gear transmission 8 and a drum 9. The drum has supports rotation in the housing 4 in the form of bearings 10.
Leading rollers should be made of polyurethane with a high coefficient of friction for steel, and steel can serve as a billet for a load-carrying rod.
The elevator comprises guide rollers 11 mounted on the hull and the loading platform, in contact with the guide rods 2. The axles 12 of the drive rollers are provided with spherical hinges 13 and 14. The hinges 14 are located in the radial holes of the drum 9 and are capable of displacement along the axes of these holes. In the housing on the drum 9 is mounted a controlled rotary drive of the axes 12 of the driving rollers, consisting of disks 15 connected by a glass 16 and capable of simultaneous rotation around the axis of the drum. Each of the above disks has 4 through holes made at an equal distance around the circumference. In these holes are hinges 13 axes of the drive rollers. In addition to the disks 15 of the glass 16, the drive of rotation of the axes of the driving rollers contains a screw mechanism 17 with a nut, driven into rotation by an integrated electric motor. The specified motor is powered and its operation mode is controlled by a current collector 18. The electric wires connecting the terminals of the screw mechanism electric motor and the current collector are located in the channel K formed by the openings in the drum 9. The screw mechanism 17 is connected to the drum 9 via hinges 19 and 20 and one of the disks 15. In addition, the housing 4 of the elevator is equipped with a load size sensor on the loading platform, made in the form of tension springs 21 installed between the support 22 and the pressure m 23 drives the housing. Moreover, the axis of the springs are parallel to the axis of the load-bearing rod. The housing casing 24 on its inner surface has grooves of an annular rectangular shape, open towards the axis of the load-carrying rod. In addition, for each drive roller there is a drive for changing the force of its pressing against the load-carrying rod. These actuators consist of rotary levers 25 pivotally mounted on the drum 9 with the possibility of rotation in a plane radial with respect to the load-carrying rod. At one end of the pivoting levers are mounted rollers 26 located in the annular grooves of the housing casing with the possibility of rolling along the upper or lower walls of the annular grooves. At the other end of each pivot arm, a threaded hole is made in which the pressure screw 27 is located. The pressure screws provide spring preload 28 and the pressure of the drive rollers against the load-bearing rod. Brackets 29 with rollers 30 in contact with the outer surface of the load-carrying rod are evenly strengthened on the support disk 22 of the elevator housing. The axis of rotation of the above rollers is perpendicular to the axis of the load-bearing rod. In addition, the hoist is equipped with an electric start-up and control system 31 and contains a counterweight 32 freely placed in the cavity of the load-carrying rod and connected by steel ropes 33 through equalizing 34 and supporting blocks 35 to the body of the hoist. In the upper and lower parts of the counterweight at an equal distance around the circumference, levers 36 with rollers 37 are hingedly mounted. The axis of rotation of these levers and rollers are perpendicular to the axis of the load-bearing rod. The rollers 37 are pressed against the cylindrical surface of the cavity of the load-bearing rod due to the springs 38 mounted between the levers 36 and the counterweight 32. The tension of the springs is such that during starts, movement and stops of the elevator, the counterweight swings and its contact with the surface of the cavity of the load-bearing rod is excluded. The counterweight balances the total weight of the hull and the loading platform of the lift.
The lift works as follows. In the initial stationary position of the elevator, the drive rollers 5 are axially 12 parallel to the axis of the load-bearing rod 1. The drive rollers are pressed against the outer surface of the load-bearing rod due to the spring tension 28 created by the pressure screws 27. Moreover, the spring tension is created so that the drive rollers cannot slip during movement unloaded lift up.
When loading the lift, its body moves downward relative to the stationary driving rollers and the drum, overcoming the resistance of the springs 21. This movement of the body is proportional to the load of the lift. Since the rollers 26 are placed in the annular groove of the casing 24, the axial displacement of the housing drives the rotary levers 25. In this case, the pressure screws 27, moving towards the springs 28, increase their tightness and thereby increase the pressure of the driving rollers on the load-carrying rod. Moreover, the stiffness of the springs 21 and 28, the dimensions of the pivoting levers 25, as well as the frictional characteristics of the materials are such that the increment of the friction forces in the contact of the drive rollers and the load-bearing rod always exceeds the weight of the load placed on the cargo platform. Due to this, the lift does not shift down when loading and does not slip when moving up.
To bring the lift into motion using the start-up and control system 31, an electric motor 7 is turned on, which drives the drum 9 through a gear 8. The drive rollers, arranged with their axes parallel to the axis of the load-bearing rod, begin to roll over its surface. Moreover, the path of their running represents a circle lying in a plane perpendicular to the axis of the load-carrying rod. In this case, the driving rollers and the rotating drum are not displaced along the axis of the load-bearing rod. The body and the loading platform of the lift remain stationary. Next, the built-in electric motor of the screw mechanism 17 is turned on and the distance between the hinges 19 and 20 is gradually increased, by means of which the specified mechanism is connected to the drum 9 and the disk 15. This causes two rigidly connected disks 15 to rotate simultaneously with respect to the drum 9. The hinges 13 of the axes of the driving rollers, being placed in the holes of the disks 15 are shifted along a curved path in a horizontal projection representing a circle. As a result of such a movement of the hinges 13, the axes of the driving rollers, turning around the hinges 14, begin to deviate from their initial position parallel to the axis of the load-bearing rod. Moreover, a synchronized, equal in magnitude and direction, rotation of the axes of all the driving rollers is provided. At any moment of such a rotation, the rollers are pressed against the load-bearing rod, and their axes are located in planes parallel to the axis of the load-bearing rod. In this case, the trajectory of the run-in by the leading rollers of the surface of the load-bearing rod takes the form of a helix with a smooth increase in its stroke. As a result of this, the drive rollers, the drum, the housing and the loading platform begin to move along the axis of the load-carrying rod. The required speed of the lift is provided by tilting the axes of the drive rollers at the corresponding rotational speed of the drum. The speed of the lift is adjusted automatically or by the operator using the start-up and control system 31. When the required speed is reached, the power of the screw mechanism 17 motor is turned off. The axles of the drive rollers maintain their inclination, and the lift moves at a constant speed.
Before stopping the elevator, the reverse rotation of the built-in electric motor of the screw mechanism 17 is turned on and the disks 15 are gradually rotated in the opposite direction and thereby reduce the angle of inclination of the axes of the drive rollers. The course of the helical trajectory of the running-in of the leading rollers of the surface of the load-bearing rod decreases. The lift smoothly slows down and stops when the axles of the drive rollers are parallel to the axis of the load-bearing rod.
After the operation of loading and unloading with a rotating drum, turning on the drive turning axles of the driving rollers and tilting them, resume the movement of the lift. If necessary, change the direction of movement of the hoist after it stops turning on the reverse rotation of the electric motor 7 of the drive rotation of the drive rollers.
The absence of distortions, jamming of the driving rollers and the smooth movement of the lift provide the rollers 30 in contact with the load-carrying rod.
The guide rollers 11, rolling on the guide rods 2, prevent the elevator from turning around the axis of the load-bearing rod.
In the implementation of the invention can be achieved technical results associated with a decrease in the required power of the drive and starting electrical equipment, as well as with an increase in the durability of the lift.
INFORMATION SOURCES.
1. The patent of Germany DE 4118134 C1, MKI B 66 in 9/04.
2. German patent DE 2746268 A1, MKI B 66 in 9/08.
3. DE 19618080 A1, B 66 V 9/02, 11/13/1997.

Claims (3)

1. A hoist comprising a housing of at least one hollow, circular cross-section, a load-carrying rod, a loading platform connected to the housing, drive rollers pressed against the outer surface of said rod, a drive of rotation of the drive rollers mounted on the housing, including an engine and a mechanical transmission, guide rollers mounted on the housing and the loading platform, characterized in that the drive rotation of the drive rollers is equipped with at least one drum mounted in the housing, in the axial opening of which a load-bearing rod is positioned, the drum is connected through the said transmission to the engine for rotation in the housing about the axis of the load-bearing rod covered by it, and is also mounted with the possibility of limited axial movement relative to the housing, the axes of the driving rollers at their ends have hinges installed in the drum with the possibility of eliminating them axial displacement relative to the drum, while one of the hinges of the axis of each drive roller is mounted with the possibility of radial displacement relative to the axis of the load-bearing the rod, and the second hinge is mounted with the possibility of moving along a curved path and with the possibility of synchronously limited rotation of the axes of the drive rollers to deviate from a position parallel to the axis of the load-bearing rod, while maintaining at any time such a rotation of the pressure of the drive rollers to this rod through a controlled drive, and the axis the drive rollers with the said rotation are located in planes parallel to the axis of the load-bearing rod, the lift is equipped with drives for changing the pressing force of the drive rollers in to the load-bearing rod is proportional to the weight of the transported cargo and at least one guide rod for interacting with the guide rollers, and in the cavity of the load-carrying rod there is a counterweight connected by flexible couplings and blocks to the body to balance the weight of the body and the loading platform.
2. The lift according to claim 1, characterized in that the counterweight is fixed to rollers with axes of rotation perpendicular to the axes of the load-carrying rods and pressed against the surface of the cavity of the latter.
3. The lift according to claim 1, characterized in that the casters are fixed to the housing, having axes of rotation perpendicular to the axes of the load-carrying rods and in contact with the outer surface of the said rod.
RU2004120059/11A 2004-07-05 2004-07-05 Lifter RU2271328C1 (en)

Priority Applications (1)

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RU2004120059/11A RU2271328C1 (en) 2004-07-05 2004-07-05 Lifter

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RU2004120059/11A RU2271328C1 (en) 2004-07-05 2004-07-05 Lifter

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2448893C2 (en) * 2009-11-17 2012-04-27 Алексей Иванович Карпенков Suspended stair elevator
RU2453490C2 (en) * 2009-11-17 2012-06-20 Алексей Иванович Карпенков Suspended stair elevator
RU2637702C2 (en) * 2016-05-26 2017-12-06 Алексей Иванович Карпенков Friction drive of vertical hoist carriage
RU2666040C2 (en) * 2017-03-02 2018-09-05 Алексей Иванович Карпенков Friction drive of vertical lift carriage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2448893C2 (en) * 2009-11-17 2012-04-27 Алексей Иванович Карпенков Suspended stair elevator
RU2453490C2 (en) * 2009-11-17 2012-06-20 Алексей Иванович Карпенков Suspended stair elevator
RU2637702C2 (en) * 2016-05-26 2017-12-06 Алексей Иванович Карпенков Friction drive of vertical hoist carriage
RU2666040C2 (en) * 2017-03-02 2018-09-05 Алексей Иванович Карпенков Friction drive of vertical lift carriage

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20130706