Car level compensation device and method

Abstract

The present invention discloses a car level compensation device and method, comprising a lifting frame, on which a car is provided, the lifting frame being used to connect to a traction mechanism, with lifting frames extending outward from both sides of the car, and traction assemblies being provided between both sides of the car and the lifting frame, and further comprising a detection drive device, wherein the detection drive device is used to detect the balance of the car, and when the detection drive device detects that the car has lost balance, the detection drive device drives the traction assemblies on both sides to tighten or loosen so that the car can be restored to balance. Under the action of the detection drive device, the present invention can realize automatic compensation adjustment of the car, and the car balance adjustment is more convenient and quick. The traction assemblies on both sides can respond quickly and directly tighten or loosen the car on the corresponding side, quickly applying a straightening force to the car, and the adjustment response is more rapid. When the car is unbalanced, it can quickly restore to a balanced and stable state.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator car adjustment, and in particular to a car level compensation device and method. Background Art

[0002] During the operation of the elevator car, the uneven load inside the car will cause the car to swing to a certain extent, making the car unstable in the horizontal direction. Especially when the car is in a high-speed operation state, the horizontal instability of the car will seriously affect the operation safety of the car, and will cause serious collisions and wear between the various parts of the elevator. Therefore, it is necessary to perform horizontal compensation adjustment on the elevator car to keep the car stable in the horizontal direction. The more common compensation adjustment method is counterweight adjustment. The counterweight adjustment is to adjust the overall center of gravity of the car by adjusting the counterweight block on the car to keep the car balanced and stable. For example, the patent document with publication number CN201545569U discloses an automatic detection and compensation device for car overload on an elevator. The compensation device sets a counterweight block at the bottom of the car. By adjusting The position of the counterweight block keeps the car balanced and stable, but this type of compensation device has certain limitations. In order to adjust the counterweight block, this type of compensation device needs to set a piezoelectric sensor on the car guide shoe to sense the pressure between the guide shoe and the elevator track and transmit the pressure signal to the charge amplifier, filter, signal acquisition card and other devices for processing. The signal is then finally transmitted to the computer for force calculation, and then drives the motor to operate to adjust the position of the counterweight block, thereby achieving the adjustment of the overall center of gravity of the car. The entire pressure signal processing process in the above process is relatively cumbersome and cannot quickly achieve stable adjustment of the car, especially for this type of compensation method of re-adjusting the center of gravity. The response of the counterweight block when moving and adjusting under the drive of the motor and screw, and until the overall center of gravity of the car is stabilized again, is not fast enough, and the car cannot quickly re-enter a stable state. Summary of the Invention

[0003] The purpose of the present invention is to avoid the deficiencies of the prior art and to provide a car level compensation device and method, thereby effectively solving the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a car level compensation device, including a lifting frame, a car is arranged on the lifting frame, the lifting frame is used to connect with the traction mechanism to drive the car to rise and fall, the middle part of the car is connected to the lifting frame, and the lifting frames are extended outward on both sides of the car. Traction components are provided between the two sides of the car and the lifting frame, and also includes a detection drive device, the detection drive device is used to detect the balance of the car. When the detection drive device detects that the car has lost balance, the detection drive device drives the traction components on both sides to tighten or loosen to restore the balance of the car.

[0005] Furthermore, the lifting frame includes a transverse frame, on which a vertical frame for connecting to the traction mechanism is provided, the middle part of the car is connected to the transverse frame, one end of the traction assembly is connected to the vertical frame, and the other end of the traction assembly is connected to the car.

[0006] Furthermore, the connection between the traction assembly and the car is close to the bottom of the car, and the connection between the traction assembly and the vertical frame is close to the horizontal position of the top of the car.

[0007] Furthermore, the distance between the two connection points of the traction assembly and the car is at least twice the distance between the two connection points of the traction assembly and the vertical frame.

[0008] Furthermore, the angle between the traction assembly and the horizontal plane is greater than 45 degrees.

[0009] Furthermore, the detection drive device includes a balance detector arranged on the car, which is used to detect the balance of the car, and also includes a controller for receiving the balance detector signal. The controller responds to the signal of the balance detector to drive the traction component to work so that the car can restore balance.

[0010] Furthermore, a balance beam is provided on the vertical frame, and the traction assembly is connected to the vertical frame via the balance beam.

[0011] Furthermore, the traction assembly includes a manual adjustment part and an automatic adjustment part, and the automatic adjustment part is used to respond to the detection drive device.

[0012] Furthermore, a limiting mechanism for limiting the swing angle of the car is provided between the vertical frame and the car.

[0013] A car level compensation method, the method comprising:

[0014] When the car loses balance, the upper part of the car deviates to one side. The balance detector detects the imbalance of the car and sends a signal to the controller. Under the control of the controller, the traction assembly on the side that deviated to the imbalance is tightened and / or the traction assembly on the other side is loosened to restore the balance of the car.

[0015] The above-mentioned technical solution of the present invention has the following beneficial effects: under the action of the detection drive device, the present invention can realize automatic compensation adjustment of the car, and the balance adjustment of the car is more convenient and quick. The traction components on both sides can respond quickly and directly tighten or loosen the car on the corresponding side, quickly apply a straightening force to the car, and the adjustment response is faster. When the car is unbalanced, it can quickly restore to a balanced and stable state. The setting of the balance beam, when the balance adjustment of the car is performed, the balance beam will produce a certain swing, which plays a pre-tensioning role on the traction component on the corresponding side, so that the traction components on both sides can be adjusted in a tensioned state, avoiding shock shocks caused by relaxation between the components, and preventing the car from frequently oscillating back and forth due to the kinetic energy of the impact, so that the car can stably restore to balance under the action of the beam force, which is conducive to the car quickly restoring to a balanced state. In addition, the car can also be manually adjusted through the connecting buckle, which further increases the adjustment method and improves the convenience of adjustment in actual application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the car level compensation device proposed in Example 1 of the present invention;

[0017] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0018] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0019] Figure 4 This is a schematic structural diagram of a car level compensation device proposed in the second embodiment of the present invention;

[0020] Figure 5 for Figure 4 A partial enlarged view of point C in the middle.

[0021] In the figure: 1. Car; 2. Traction assembly; 3. Horizontal frame; 4. Vertical frame; 5. Limit groove; 6. Limit bearing assembly; 7. Balance detector; 8. Balance beam; 9. Lintel; 10. Connecting buckle; 11. Connecting rod; 20. Automatic adjustment unit. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0023] In the description of the present invention, unless otherwise specified, “plurality” means two or more; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “front end”, “rear end”, “head” and “tail” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0024] like Figure 1-5 As shown, the car level compensation device described in this embodiment is used to compensate and adjust the elevator car after the imbalance and deflection, so that the elevator car remains balanced and stable, and the safety of the elevator car operation is improved. Specifically, it includes a lifting frame, on which a car 1 is provided. The lifting frame is used to connect with the traction mechanism of the elevator system. Under the drive of the traction mechanism, the lifting frame drives the car 1 to rise and fall along the elevator track in the elevator shaft. Therefore, the lifting frame realizes the installation and fixation of the car 1 on the one hand, and drives the car 1 to rise and fall on the other hand. More specifically, the car 1 is located on the lifting frame as a whole, and the middle part of the car 1 is connected to the lifting frame. During operation, the car 1 is more stable on the lifting frame.

[0025] The middle of the car 1 is located on the lifting frame, and the lifting frames extend outwards from both sides of the car 1. Figure 1 、 Figure 2 As shown in the drawing, the middle part of the car 1 is located on the lifting frame, and the left and right sides of the car 1 respectively extend outward in the left and right directions. A traction assembly 2 is provided between the two protruding parts of the car 1 and the lifting frame. The traction assembly 2 can be extended and retracted, thereby tightening or loosening the corresponding side of the car 1 and the lifting frame. More specifically, it also includes a detection drive device. The detection drive device can detect the balance of the car 1 on the one hand, and on the other hand drive the traction assembly 2 to work, so that the traction assembly 2 contracts. When the detection drive device detects that the car 1 loses balance When the car 1 is unbalanced, for example, when the internal load of the car 1 is unbalanced, the car 1 deflects to one side on the lifting frame, and the detection drive device drives the traction components 2 on both sides to work, and the corresponding traction components 2 tighten or loosen between the car 1 and the lifting frame, thereby straightening the car 1 and restoring the car 1 to a balanced state. Under the action of the detection drive device and the traction component 2, the balance state of the car 1 can be monitored at all times, and when the car 1 is unbalanced, the traction component 2 can respond and work quickly, directly applying a straightening force to the car 1, so that the car 1 quickly restores the balance state.

[0026] More specifically, the lifting frame includes a transverse frame 3, on which a vertical frame 4 is provided, and the vertical frame 4 is used to connect to the traction mechanism of the elevator system. In this embodiment, the transverse frame 3 is arranged horizontally, the bottom of the vertical frame 4 is connected to the transverse frame 3, and the vertical frame 4 extends upward, and the middle of the car 1 is located on the transverse frame 3. For the traction components 2 on both sides, one end of the traction component 2 is connected to the vertical frame 4, and the other end of the traction component 2 is connected to the corresponding protruding part of the car 1. More specifically, the transverse frame 3 and the vertical frame 4 can both be composed of channel steel or angle steel, and the channel steel or angle steel forms the transverse frame. 3 or the vertical frame 4, the various parts can be welded or connected by bolt assemblies, the transverse frame 3 and the vertical frame 4 can be connected by welding or bolt assemblies, the car 1 is located on the transverse frame 3, and the bottom of the car 1 and the transverse frame 3 can be connected by bolt assemblies or welding. Then, under the action of gravity, especially after the car 1 is loaded, when the car 1 is unevenly loaded in the left and right directions, the car 1 is unbalanced on the transverse frame 3, and then the top of the car 1 will swing to a certain extent in the left and right directions, and then the car 1 is forced to restore balance under the action of the traction assemblies 2 on both sides.

[0027] More specifically, the connection between the traction assembly 2 and the car 1 is closer to the bottom of the car 1, and the connection between the traction assembly 2 and the vertical frame 4 is closer to the horizontal position of the top of the car 1. Preferably, for the traction assemblies 2 on both sides, the bottom of the traction assembly 2 is hinged to the bottom of the car 1, and the top of the traction assembly 2 is hinged to the vertical frame 4. The horizontal position of the hinge point between the top of the traction assembly 2 and the vertical frame 4 is closer to the horizontal position of the top of the car 1. When the traction assembly 2 tightens the corresponding side of the car 1, the traction assembly 2 applies a tightening force to the car 1 through the bottom of the car 1, and the force applied to the car 1 is more effective, which can enable the car 1 to recover to a balanced state more quickly and stably.

[0028] More specifically, in the left and right horizontal directions, the vertical frame 4 is in the middle of the car 1, the two connection points of the two traction components 2 on both sides and the bottom of the car 1 are at the same horizontal height, the two connection points between the two traction components 2 on both sides and the vertical frame 4 are at the same horizontal height, and the distance between the two connection points of the two traction components 2 and the bottom of the car 1 is at least twice the distance between the two connection points between the two traction components 2 and the vertical frame 4. The torque of the traction component 2 on the car 1 is increased as much as possible, so that the traction component 2 can more easily compensate and correct the car 1, and the car 1 can more quickly restore to a balanced and stable state. More specifically, the bottom of the traction component 2 is tilted downward and to the left and right sides, and the angle between the overall length direction of the traction component 2 and the horizontal plane is greater than 45 degrees. The torque of the traction component 2 on the car 1 is increased as much as possible, which is more conducive to the balance recovery of the car 1.

[0029] More specifically, Figure 3As shown, a limiting mechanism is provided between the vertical frame 4 and the car 1 to limit the swing angle of the car 1 and improve the stability of the car 1 when it swings out of balance and when it restores balance under the drive of the traction assembly 2. For the limiting mechanism, a limiting groove 5 can be provided on the top of the car 1, and a limiting bearing assembly 6 is provided at the corresponding position of the vertical frame 4. The limiting bearing assembly 6 includes a bearing. After the car 1 is installed on the horizontal frame 3, the bearing can be adapted to the limiting groove 5, and the axial direction of the bearing is perpendicular to the paper surface. The left and right length directions of the limiting groove 5 limit the maximum swing amplitude of the car 1 to the left and right. In this embodiment, the width of the limiting groove 5 is slightly larger than the outer diameter of the bearing so that the car 1 can swing to a certain amplitude.

[0030] More specifically, the detection drive device includes a balance detector 7 and a controller. The balance detector 7 is arranged at the bottom of the car 1 to monitor whether the car 1 is balanced. The controller is used to receive the signal of the balance detector 7 and drive the traction component 2 to work. The installation position of the controller is not shown in the figure. At that time, the controller can be installed in the control box of the elevator system, or it can be determined according to actual conditions. More specifically, for example, the balance detector can be a horizontal detection sensor, which monitors the balance of the car 1 by monitoring whether the bottom of the car 1 is horizontal. The controller can be a PLC programmable controller. More specifically, the traction component 2 can be an electric cylinder. When the car 1 becomes unbalanced, the level detection sensor detects that the bottom of the car 1 is not level, and then transmits the signal to the PLC programmable controller. After calculation, the PLC programmable controller drives the electric cylinder on the corresponding side to adjust the extension and contraction to restore the balance of the car 1 and keep the bottom of the car 1 horizontal. The level detection sensor responds quickly to the change in the level of the car 1 and can immediately detect that the car 1 is no longer level. When the PLC programmable controller drives the electric cylinder, the electric cylinder directly applies a straightening force to the car 1. The whole recovery process is very fast. In this embodiment, the traction component 2 can also be but not limited to a cylinder, a hydraulic cylinder, a linear motor and an electric hoist.

[0031] In another embodiment, if Figure 4 、 Figure 5As shown, a balance beam 8 is provided on the vertical frame 4, and the length direction of the balance beam 8 is arranged horizontally along the left and right sides, and the left and right ends of the balance beam 8 protrude out of the vertical frame 4, and the traction components 2 on both sides are connected to the protruding parts of the balance beam 8, and then the traction components 2 are connected to the vertical frame 4 through the balance beam 8. In this embodiment, a lintel 9 is provided on the vertical frame 4, and the length direction of the lintel 9 is perpendicular to the paper surface, and the length direction of the horizontal balance beam 8 is perpendicular to the lintel 9. The balance beam 8 is connected to the vertical frame 4 through the lintel 9, and the middle part of the lintel 9 and the balance beam 8 is connected by welding or bolt assembly. When the two ends of the balance beam 8 are unevenly stressed, the balance beam 8 can swing to a certain extent around the lintel 9 within the paper surface. Then, when the car 1 is unbalanced, the car 1 deflects to one side, when the traction assembly 2 on the corresponding side is tightened to restore the balance of the car 1, the traction assembly 2 on this side applies a force to the corresponding end of the balance beam 8, so that the balance beam 8 will have a certain swing, and the end of the balance beam 8 will swing downward, and then the other end of the balance beam 8 will have a small upward swing. The small swing of the other end can pre-tighten the traction assembly 2 at the other end, so that the traction assemblies 2 on both sides can be adjusted under a certain tension state, avoiding shock and impact caused by relaxation between the components, and preventing the car 1 from frequently oscillating back and forth due to the kinetic energy of the impact, so that the car 1 can stably restore to balance under the action of the restraining force, which is conducive to the car 1 quickly restoring to a balanced state.

[0032] More specifically, the provision of the lintel 9 and the balance beam 8 can also increase the local structural strength of the vertical frame 4, thereby improving the overall structural strength of the vertical frame 4. This is more conducive to restoring the balance of the car 1. In addition, the left and right ends of the balance beam 8 protrude outward from the vertical frame 4 in the left and right directions, thereby preventing interference with the traction assembly 2 caused by misalignment between the connection point between the traction assembly 2 and the vertical frame 4 and the connection point between the traction assembly 2 and the car 1. This also increases the convenience of installing and removing the traction assembly 2 and the balance beam 8.

[0033] In this embodiment, a horizontal detection sensor can also be added to the balance beam 8. Since the traction components 2 on both sides are always used to drive the car 1 to be in a horizontal state, when the balance beam 8 is in a non-horizontal state, it means that the load in the car 1 is unbalanced, that is, the car 1 is in load balance. When the balance beam 8 is in a horizontal state, it means that the car 1 is empty, that is, the car 1 is in no-load balance. When the car 1 is in no-load balance, the traction component 2 can be temporarily reset to avoid fatigue caused by the traction component 2 remaining in a working state for a long time, and to avoid fatigue of the connection between the car 1 and the cross frame 3 and other rigid components caused by the traction component 2 pulling the car for a long time.

[0034] More specifically, Figure 5As shown, the traction assembly 2 includes a manual adjustment part and an automatic adjustment part 20. The automatic adjustment part 20 is used to respond to the detection drive device to automatically compensate and correct the car 1. The manual adjustment part can manually perform compensation and correction. When the elevator is repaired in a power outage, the horizontal correction of the car 1 can be manually performed, and the adjustment is more convenient. Specifically, the automatic adjustment part 20 can be an electric cylinder, an air cylinder, a hydraulic cylinder, a linear motor, and an electric hoist, etc. The manual adjustment part can include a connecting buckle 10. One end of the connecting buckle 10 is threadedly connected to one end of the automatic adjustment part 20, and the other end of the connecting buckle 10 is threadedly connected to a connecting rod 11. The connecting rod 11 and the protruding part of the balance beam 8 are hinged, and then the manual telescopic adjustment of the traction assembly 2 can be achieved by rotating the connecting buckle 10.

[0035] A car level compensation method is applied to the above-mentioned car level compensation device. The method involves a balance detector 7, a controller and a traction assembly 2. When the car 1 loses balance, the upper part of the car 1 swings toward one side in the left and right directions, and then the balance detector 7 on the car 1 detects that the car 1 is unbalanced. The balance detector 7 sends a signal to the controller. Under the control of the controller, the traction assembly 2 on the side that deviated after the car 1 is unbalanced is tightened, or the traction assembly 2 on the other side is loosened, or the traction assembly 2 on the side that deviated after the car 1 is unbalanced is tightened and the traction assembly 2 on the other side is loosened, so that the car 1 is restored to balance.

[0036] More specifically, for example, when the car 1 loses balance and the top tilts toward the right, the balance detector 7 on the car 1 detects that the car 1 is no longer level, and then transmits a signal to the controller. The controller drives the traction assembly 2 on the right side of the car 1 to tighten, so that the car 1 is compensated and corrected to the left until the car 1 remains level and balanced.

[0037] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A car level compensation device, characterized in that: The elevator comprises a lifting frame on which a car is mounted, the lifting frame being used to connect to a traction mechanism to drive the car up and down, the middle of the car being connected to the lifting frame, the lifting frames extending outwards from both sides of the car, and traction components being provided between both sides of the car and the lifting frame, the traction components being electric cylinders; The car further comprises a detection drive device, wherein the detection drive device is used to detect the balance of the car. When the detection drive device detects that the car loses balance, the detection drive device drives the traction assemblies on both sides to tighten or loosen so that the car can be restored to balance. The lifting frame includes a transverse frame, a vertical frame for connecting to the traction mechanism is provided on the transverse frame, the middle part of the car is connected to the transverse frame, one end of the traction assembly is connected to the vertical frame, and the other end of the traction assembly is connected to the car; The connection between the traction assembly and the car is close to the bottom of the car, and the connection between the traction assembly and the vertical frame is close to the horizontal position of the top of the car; The traction assembly includes a manual adjustment portion and an automatic adjustment portion, wherein the automatic adjustment portion is used to respond to the detection drive device; A limit groove is provided on the top of the car, and a limit bearing assembly is provided at a corresponding position on the vertical frame. The limit bearing assembly includes a bearing. After the car is installed on the horizontal frame, the bearing can be adapted to the limit groove, and the axis direction of the bearing is perpendicular to the paper surface; The manual adjustment part includes a connecting buckle, one end of the connecting buckle is threadedly connected to one end of the automatic adjustment part, and the other end of the connecting buckle is threadedly connected to a connecting rod. The connecting rod and the protruding part of the balance beam are hinged, and then the manual telescopic adjustment of the traction component can be achieved by rotating the connecting buckle.

2. The car level compensation device according to claim 1, characterized in that: The distance between the two connection points of the traction assembly and the car is at least twice the distance between the two connection points of the traction assembly and the vertical frame.

3. The car level compensation device according to claim 2, characterized in that: The angle between the traction assembly and the horizontal plane is greater than 45 degrees.

4. The car level compensation device according to claim 3, characterized in that: The detection drive device includes a balance detector arranged on the car for detecting the balance of the car, and also includes a controller for receiving the balance detector signal. The controller responds to the signal of the balance detector to drive the traction component to work so that the car can restore balance.

5. The car level compensation device according to claim 4, characterized in that: A balance beam is provided on the vertical frame, and the traction assembly is connected to the vertical frame via the balance beam.

6. The car level compensation device according to claim 5, characterized in that: A limiting mechanism for limiting the swing angle of the car is provided between the vertical frame and the car.

7. A car level compensation method, applied to a car level compensation device according to any one of claims 1 to 6, characterized in that: The method comprises: When the car loses balance, the upper part of the car deviates to one side. The balance detector detects the imbalance of the car and sends a signal to the controller. Under the control of the controller, the traction assembly on the side that deviated to the imbalance is tightened and / or the traction assembly on the other side is loosened to restore the balance of the car.

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