Nodal point pressure-equalising device of steel rope sets for elevator

A nodal point pressure-equalizing device of steel rope sets for an elevator, including a pressure-equalizing device main body, a base seat, a first nodal point component and a second nodal point component. The pressure-equalizing device main body can be rotatably provided on the base seat. The first nodal point component and the second nodal point component are respectively arranged at both ends of the pressure-equalizing device main body and are respectively matched with and connected with the corresponding steel rope set. The first nodal point component and the second nodal point component can respectively rotate around rotational centers thereof, and the rotational centers and the rotational center of the pressure-equalizing device main body are on the same horizontal plane.

TECHNICAL FIELD

The invention relates to a pressure-equalising device of steel rope sets for an elevator, and more particularly, to a nodal point pressure-equalising device of steel rope sets for an elevator capable of regulating a force sustained to several steel rope sets and enabling the force sustained among the steel rope sets to be the same.

BACKGROUND ART

At present, domestic and overseas elevators generally adopts a traction machine to drive. A traction elevator suspending and lifting system is composed of a traction wheel, steel rope sets, a car platform sill, a balance block system and other main parts; a friction force generated by winding each steel rope of the steel rope set in a groove of the traction wheel in the traction elevator suspending and lifting system provides a power for the car platform sill to lift up or down; under the adjustment that the elevator driving technology keeps developing, both the lifting height of the elevator and the running speed are greatly improved, at the same time, higher requirements are also proposed on the safety and the reliability of the elevator. Theoretically, the force sustained to each steel rope in the steel rope set shall be the same in the using process of the elevator, and the shape and the size of the groove for winding the steel rope on the traction wheel shall also be the same; but in the actually using process, the force sustained to each steel rope in the steel rope set shall be different due to various reasons, this results in a situation that some steel ropes are forced highly and some steel ropes are forced lowly; the friction force between the highly-forced steel rope and the groove on the corresponding traction wheel will relatively higher, this results in a condition that the friction of the groove on the corresponding traction wheel is more severe, so the shape and the size of the groove on the corresponding traction wheel are changed over time, resulting in that the highly-forced steel rope is forced more and more in work. If the radius of the worn groove on the traction wheel is reduced by 0.1 mm, the steel rope will move less than 0.314 mm; by taking the 20-storey building for example, the traction wheel will rotate about 100 turns, so the steel rope will move less than 31.4 mm. Through test, it is discovered that the steel rope will forced more than about 3000N; when the steel rope in the steel rope set is forced unevenly, a wriggling phenomenon is generated between the lowly-forced steel rope and the traction wheel, the wriggling between the steel rope and the traction wheel will cause the abrasion of the steel rope and the traction wheel; the higher the storey is, the more severe the situation above becomes. Therefore, the highly-forced steel rope used for a long time is easy to break in the using process, resulting in safety accidents of the elevator; at the same time, the lowly-forced steel rope will also be damaged due to the abrasion of the traction wheel. If the damage is severe, the steel rope will also be broken to result in the safety accidents of the elevator; for this reason, we develop a two nodal point pressure-equalising device of steel rope sets for an elevator capable of adjusting the force to two steel rope sets and enabling these two steel rope sets to force the same.

SUMMARY OF THE INVENTION

The object of the invention is to overcome the shortages of the prior art and is intended to provide a nodal point pressure-equalising device of steel rope sets for an elevator capable of adjusting the force to several steel rope sets and enabling several steel rope sets to force the same.

In order to achieve the object above, the invention adopts the main technical scheme as follows: a nodal point pressure-equalising device of steel rope sets for an elevator includes a pressure-equalising device main body, a base seat, a first nodal point component and a second nodal point component, wherein the pressure-equalising device main body can be rotatably provided on the base seat; the first nodal point component and the second nodal point component are respectively arranged at both ends of the pressure-equalising device main body and are respectively matched with and connected with the corresponding steel rope set; the rotational center of the pressure-equalising device main body is located on the center line of the pressure-equalising device main body; the first nodal point component and the second nodal point component can respectively rotate around rotational centers thereof, the rotational centers and the rotational center of the pressure-equalising device main body are on the same horizontal plane, and the moment of the first nodal point component relative to the center line of the pressure-equalising device main body is equal to the moment of the second nodal point component relative to the center line of the pressure-equalising device main body.

In addition, the invention further provides auxiliary technical scheme as follows:

The first nodal point component and the second nodal point component respectively include at least one spherical nodal point and at least one spherical cavity, and the spherical nodal point is accommodated in the spherical cavity and can rotate or swing.

The first nodal point component and the second nodal point component respectively include one spherical nodal point, the pressure-equalising device main body is symmetrically provided with 2 spherical cavities; and the spherical nodal point is arranged in each spherical cavity, and can rotate or swing.

The lower portion of the pressure-equalising device main body is provided with a rotating mount; the center line of the pressure-equalising device main body and the center line of the rotating mount are collinear; the bottom of the rotating mount is provided with an arc-shaped bump; the base seat is provided with an arc-shaped groove; and when the arc-shaped bump is arranged in the arc-shaped groove, the arc-shaped bump can rotate around the arc-shaped groove.

The first nodal point component includes a first spherical nodal point; the center of the first spherical nodal point is provided with a first through hole; the first through hole is used for mounting the steel rope set; the second nodal point component is symmetrically provided with 2 second spherical nodal points along the center surface of the second nodal point component; the rotational center of the second nodal point component is located on the center surface; the center of the second spherical nodal point is provided with a second through hole; and the second through hole is used for mounting the steel rope set.

The rotational center of the second nodal point component and the rotational center of these 2 second spherical nodal points arranged on the second nodal point component are on the same horizontal plane and are collinear; and the rotational center of the second nodal point component, the rotational center of the pressure-equalising device main body and the rotational center of the first nodal point component are on the same horizontal plane and are collinear.

The distance from the rotational center of the second nodal point component to the rotational center of the pressure-equalising device main body is half of the distance from the first nodal point component to the rotational center of the pressure-equalising device main body.

The bottom of the pressure-equalising device main body is provided with a first spherical bump; the base seat is provided with a first spherical cavity; the first spherical bump is placed in the first spherical cavity, and the first spherical bump can rotate around the first spherical cavity.

The lower portion of the second nodal point component is provided with a rotating mount; the center surface of the second nodal point component is overlapped with the center surface of the rotating mount arranged on the second nodal point component; the bottom of the rotating mount is provided with a second spherical bump; one end of the pressure-equalising device is provided with a second spherical cavity; the other end is provided with a fourth spherical cavity; the second spherical bump is arranged in the second spherical cavity; the second spherical bump can rotate around the second spherical cavity; the fourth spherical cavity is internally provided with a first spherical nodal point; and the first spherical nodal point can rotate around the fourth spherical cavity.

The second nodal point component is symmetrically provided with 2 third spherical cavities along the center surface; each third spherical cavity is internally mounted with a second spherical nodal point, and each second spherical nodal point can rotate in the third spherical cavity.

The pressure-equalising device main body is provided with a screw hole, and screws can fix the rotating mount at the lower portion of the pressure-equalising device main body via the screw hole.

The first nodal point component comprises a balancing seat and three spherical nodal points mounted on the balancing seat.

The balancing seat is in a shape of right triangle, these three spherical nodal points are located on positions of three included angles and are arranged in a way of centrosymmetry.

The second nodal point component comprises a balancing seat and two spherical nodal points symmetrically mounted on the balancing seat together.

The first nodal point component and the second nodal point component are respectively provided with rotating mounts, the rotating mount is provided with a spherical bump, both ends of the pressure-equalising device main body are respectively provided with a spherical cavity, and the spherical bump can be arranged in the spherical cavity in a swinging way.

The distance from the rotational center of the second nodal point component to the rotational center of the pressure-equalising device main body is 1.5 times of the distance from the rotational center of the first nodal point component to the rotational center of the pressure-equalising device main body.

For the nodal point pressure-equalising device of the steel rope sets for the elevator, the rotational center of the first nodal point component, the rotational center of the second nodal point component and the rotational center of the pressure-equalising device main body are located on the same plane and are collinear.

The base seat is uniformly distributed with fixed holes to conveniently mount the base seat.

The nodal point pressure-equalising device of the steel rope sets for the elevator is mounted at the heat or the tail of the steel rope.

Due to the use of the technical scheme above, the invention has the advantages as follows compared to the prior art: the provided nodal point pressure-equalising device of the steel rope sets of the elevator is mainly well designed by means of the lever principle and can adjust more than two steel rope sets, and the device can adjust the pressure sustained by two sets of steel ropes, and when a stable state is reached, the pressure sustained by each steel rope set will be the same, thereby enabling the damage caused by unequal pressure sustained by steel ropes for an elevator to be overcome. In this way, the service life of the steel rope set is prolonged and the safety of the elevator is improved.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The invention will be further described in details with reference to the drawings and the specific embodiments hereinafter. The invention totally provides three embodiments, each of which will be respectively described in details hereinafter, wherein the same or similar structure in different embodiments adopts the same mark number and unnecessary details will not be given any more.

FIG. 1is a nodal point pressure-equalising device of steel rope sets for an elevator corresponding to the first embodiment according to the invention, which is mounted at the head or tail of a dragging steel rope set (without being shown in the figure) and includes a pressure-equalising device main body1; the pressure-equalising device main body1can be rotatably arranged on a base seat5; the pressure-equalising device main body1is symmetrically provided with a first nodal point component and a second nodal point component; corresponding to the embodiment, the first nodal point component A and the second nodal point component B respectively include a spherical nodal point8to mount two steel rope sets; the center of the spherical nodal point8is provided with a through hole9; the through hole9is used for mounting one of the steel rope sets; the spherical nodal point8can rotate or swing around the pressure-equalising device main body1; the rotational center C of the pressure-equalising device main body1is located on the center line L of the pressure-equalising device main body1; and the rotational center D of each spherical nodal point8and the rotational center of the pressure-equalising device main body1are on the same horizontal plane and are collinear. At the same time, the moment (the force multiplying by the distance) of the first nodal point component A relative to the center line L is equal to the moment of the second nodal point component B relative to the center line L.

In the embodiment, as shown inFIG. 1, the pressure-equalising device main body1is symmetrically provided with 2 spherical cavities2along the center line; the spherical nodal point8is arranged in each spherical cavity2and can rotate; the lower portion of the pressure-equalising device main body1is provided with a rotating mount4; the center line L of the pressure-equalising device main body1and the center line of the rotating mount4are collinear; the bottom of the rotating mount4is provided with an arc-shaped bump6; the base seat5is provided with an arc-shaped groove7; when the arc-shaped bump6is placed in the arc-shaped groove7, the arc-shaped bump6can rotate or swing around the arc-shaped groove7; the pressure-equalising device main body1is provided with a screw hole3, screws (without being shown) can fix the rotating mount4at the lower portion of the pressure-equalising device main body1via the screw hole3; and the base seat5is uniformly distributed with fixed holes10to conveniently mount the base seat5.

Of course, in the embodiment, the arc-shaped bump6can also be set as a spherical bump, and the corresponding arc-shaped groove7is set as a spherical groove.

Due to the use of the technical scheme above, the invention has the advantages as follows compared to the prior art: a nodal point pressure-equalising device of steel rope sets for an elevator provided in the invention is specifically a two nodal point pressure-equalising device, which enables each independent traction steel rope to have a mechanics relationship correlative to the other steel rope by means of an oscillating bar and the lever principle, i.e., the change in the force sustained to any steel rope will transmit to the first nodal point component or the second nodal point component under the condition that the force is sustained to the traction steel rope set, and the spherical nodal point is forced to swing to enable the pressure-equalising device main body to lose balance to swing around the rotational center C. In this way, the change in the force sustained to the spherical nodal point will be transmitted to the other spherical nodal point to enable the force sustained to these two spherical nodal points to balance, i.e., the force sustained to each steel rope set to be equal by means of the lever principle.

The embodiment can automatically adjust the force sustained to these two steel rope sets, the force sustained to these two steel rope sets will be the same when the invention achieves the stable state, so damages caused by different forces sustained to the steel able sets for the elevator can be overcome. In this way, the service life of the steel rope set is prolonged and the safety of the elevator is improved.

FIG. 2andFIG. 3are a nodal point pressure-equalising device of steel rope sets for an elevator corresponding to the second embodiment according to the invention, which is mounted at the head or tail of three steel rope sets and includes a pressure-equalising device main body1and a first nodal point component A′ and a second nodal point component B′ arranged at both ends of the pressure-equalising device main body1; similarly, the pressure-equalising device main body1can be arranged on a base seat in a rotating or swinging way; the structure of the first nodal point component A′ of the embodiment is the same as the structure of the first nodal point component A′ in the first embodiment, the first nodal point component A′ also includes a first spherical nodal point15; the first spherical nodal point15can rotate or swing around the pressure-equalising device main body1; the center of the first spherical nodal point15is provided with a first through hole16; the first through hole16is used for mounting one steel rope set (without being shown); while the second nodal point component B′ includes a balancing seat21and is symmetrically provided with 2 second spherical nodal points26along the center surface M; the rotational center E of the second nodal point component B′ is located on the center surface M; the center of the second spherical nodal point26is provided with a second through hole27; the second through hole27is used for mounting one steel rope set (without being shown); the rotational center E of the second nodal point component B′ and the rotational center F of 2 second spherical nodal points26arranged thereon are on the same horizontal plane and are collinear; the rotational center E of the second nodal point component B′, the rotational center (without being marked) of the pressure-equalising device main body1and the rotational center of the first spherical nodal point15(without being marked) are on the same horizontal plane and are collinear; and the distance from the rotational center E of the second nodal point component B′ to the rotational center of the pressure-equalising device main body1is half of the distance from the first nodal point component A′ to the rotational center of the pressure-equalising device main body1. In this way, the moment of the first nodal point component A′ and the second nodal point component B′ is equal to the moment of center line L of the pressure-equalising device main body1relatively.

In the embodiment, the bottom of the pressure-equalising device main body1is provided with a first rotating mount11; the base seat5is provided with a first spherical cavity12; the first rotating mount11is placed into the first spherical cavity12, the first rotating mount11can rotate around the first spherical cavity12; in addition, the lower portion of the second nodal point component B′ is provided with a second rotating mount24, the center surface M of the second nodal point component B′ is overlapped with the center surface of the second rotating mount24; the bottom of the second rotating mount24is provided with a second spherical bump25; one end of the pressure-equalising device main body1is provided with a second spherical cavity13; the other end is provided with a fourth spherical cavity14; the second spherical bump25is arranged in the second spherical cavity13; the second spherical bump25can rotate around the second spherical cavity13; the fourth spherical cavity14is internally provided with a first spherical nodal point15; the first spherical nodal point15can rotate around the fourth spherical cavity14; the second nodal point component B′ is symmetrically provided with 2 third spherical cavities22along the center surface; each third spherical cavity22is internally provided with a second spherical nodal point26, each second spherical nodal point26can rotate along the third spherical cavity22arranging the second spherical nodal point26; the second nodal point component B′ is provided with a screw hole23, the second rotating mount24can be fixed at the lower portion of the second nodal point component B via the screw hole23; and the base seat is uniformly distributed with fixed holes10to conveniently mount the base seat5.

It is thus clear that the nodal point pressure-equalising device of the steel rope sets for the elevator of the embodiment is 3 nodal point pressure-equalising devices specifically, including a first nodal point component A′ having one spherical nodal point15and a second nodal point component B′ having two spherical nodal points26, the first nodal point component A′ and the first nodal point component A in the first embodiment have much the same configuration, while the second nodal point component B′ is equivalent to the configuration after removing the base seat5in the first embodiment. The embodiment the same as the first embodiment enables the force sustained to each steel rope set to be the equal by means of the lever principle, so in the running process of the elevator, the friction force generated by winding the traction steel rope in the traction wheel groove is consistent as each traction steel rope is forced equally, and the traction steel rope and the traction wheel groove will not generate a relatively sliding phenomenon. As a result, the abrasion on the traction steel rope and the traction wheel groove is reduced, the service life of the traction wheel groove and the traction steel rope is prolonged, and the safety and the reliability of the elevator are also improved.

SeeFIG. 4toFIG. 7, the nodal point pressure-equalising device of the steel rope sets for the elevator of the third embodiment according to the invention is mounted at the head or tail of the steel rope set, and at the same includes a pressure-equalising device main body1, a base seat5and a first nodal point component A″ and a second nodal point component B″ located at both ends of the base seat5, similarly, the pressure-equalising device main body1can be mounted on the base seat5via the rotating mount4in a rotating or swinging way. In addition, the second nodal point component B″ and the second nodal point component B′ in the second embodiment have much the same configuration, so the detailed description is omitted here.

The first nodal point component A″ includes a balancing seat31and three third spherical nodal points35mounted on the balancing seat31. The balancing seat31is generally in a shape of right triangle, these three spherical nodal points35are located on positions of three included angles and are arranged in a way of centrosymmetry. The swinging center33of the first nodal point component A″ is overlapped with the center of gravity. The center of each third spherical nodal point35is provided with a third through hole36; the third through hole36is used for mounting the steel rope (without being shown); and the balancing seat31is provided with three spherical cavities32for accommodating the corresponding third spherical nodal point35. The swinging center33of the first nodal point component A″ and the swinging center G of these 3 third spherical nodal points35arranged on the first nodal point component A″ are on the same horizontal plane; swinging center33of the first nodal point component A″, the swinging center of the pressure-equalising device main body1(without being marked) and the swinging center H of the second nodal point component B″ are on the same horizontal plane and are collinear; at the same time, the distance from the swinging center H of the second nodal point component B″ to the swinging center of the pressure-equalising device main body1is 1.5 times of the distance from the swinging center of the first nodal point component A″ to the swinging center of the pressure-equalising device main body1.

In the embodiment, the rotating mount24having the spherical bump25is arranged below the first nodal point component A″ and the second nodal point component B″ respectively and is respectively mounted in the spherical cavities37at both ends of the pressure-equalising device main body1. It is thus clear that the nodal point pressure-equalising device of the steel rope sets for the elevator provided in the third embodiment is 5 nodal point pressure-equalising devices, which are provided with a first nodal point component A″ having three spherical nodal points and a second nodal point component B″ having two spherical nodal points. The same lever principle as the first embodiment and the second embodiment is adopted so that the force sustained to each steel rope set is equal.

In summary, only if the different nodal point pressure-equalising devices of the steel rope set for the elevator described in the invention adopt the above arrangement and lever principle, the configuration and combination can be diversified to apply in the several nodal point pressure-equalising devices. All multi-nodal point pressure-equalising devices without 2 nodal points can be combined, for example, two nodal point pressure-equalising device can be combined as a 4-nodal point pressure-equalising device, two 3-nodal point pressure-equalising device can be combined as a 6-nodal point pressure-equalising devices, etc., so as to be sustained in different steel rope sets for various elevators.

The embodiments above are only for describing the technical through and features of the invention, with a view to enabling the technical personnel who are familiar with the technology to understand the content of the invention and implement, but not intended to limit the protection scope of the invention. Any equivalent change or modification made according to the spiritual essence of the invention shall all fall within the protection scope of the invention.