阅读说明：本技术 电梯调节器 (Elevator regulator ) 是由 Y.权 R.S.杜布 于 2019-06-28 设计创作，主要内容包括：图示的示例电梯调节器包括至少一个甩块,至少一个甩块构造成在与零速度状态相对应的初始位置和与到达预限定阈值的电梯速度相对应的激活位置之间移动第一距离。偏置构件将至少一个甩块朝初始位置偏置。偏置构件构造成：当电梯速度到达预限定阈值时,允许至少一个甩块到达激活位置。甩块位置构件将至少一个甩块的静止位置设置在初始位置和激活位置之间的零速度状态中。至少一个甩块的运动范围被限制至在静止位置和激活位置之间的第二较短距离。(The illustrated example elevator governor includes at least one thrower configured to move a first distance between an initial position corresponding to a zero speed condition and an activated position corresponding to an elevator speed reaching a predefined threshold. A biasing member biases the at least one flail towards the initial position. The biasing member is configured to: when the elevator speed reaches a predefined threshold, at least one throw block is allowed to reach an active position. The flail position member sets a rest position of the at least one flail in a zero speed state between an initial position and an activated position. The range of motion of the at least one flail is limited to a second shorter distance between the rest position and the activated position.)

1. An elevator governor, comprising:

at least one flail configured to move a first distance between an initial position corresponding to a zero speed condition and an activated position corresponding to an elevator speed reaching a predefined threshold;

a biasing member biasing the at least one flail toward the initial position, the biasing member configured to: allowing the at least one flyweight to reach the activated position when the elevator speed reaches the predefined threshold; and

a flail position member that sets a rest position of the at least one flail in a zero speed state between the initial position and the activated position such that a range of motion of the at least one flail is limited to a second shorter distance between the rest position and the activated position.

2. The elevator governor of claim 1, comprising a sheave configured to move at a governor speed corresponding to the elevator speed, and wherein

The at least one thrower is supported on the pulley for movement therewith and for movement within the range of motion.

3. The elevator governor of claim 2 wherein the bump location member is secured to the sheave.

4. The elevator governor of claim 1 wherein the throw position member forms part of the throw.

5. The elevator governor of claim 1 wherein the throw position member is supported on the at least one throw.

6. The elevator governor of claim 1 wherein

The at least one thrower remaining in the rest position within a first range of elevator speeds between the zero speed condition and an intermediate elevator speed below the predefined threshold; and is

In a second range of elevator speeds between the intermediate elevator speed and the predefined threshold, the at least one thrower moves between the rest position and the activated position against the bias of the biasing member.

7. The elevator governor of claim 1 wherein

The biasing member comprises a spring having a spring constant and a length to induce tension; and is

The spring constants are selected as: resisting movement of the at least one slinger from the initial position to the activated position in a manner that allows the at least one slinger to reach the activated position if the elevator speed reaches the predefined threshold.

8. The elevator governor of claim 7 wherein

The spring has a first length corresponding to the at least one flail in the initial position;

the first length corresponds to a first induced tension;

when the at least one flail is in the rest position, the spring is stretched to a second length;

the second length is longer than the first length;

the second length corresponds to a second induced tension;

the second induced tension is higher than the first induced tension;

when the at least one flyweight is in the activated position, the spring is further stretched to a third length; and is

The third length is longer than the second length.

9. The elevator governor of claim 1 wherein

The at least one flail block comprises a plurality of flail blocks; and is

The flail position members include a corresponding plurality of position members that prevent movement of the respective flail from the rest position toward the initial position.

10. The elevator governor of claim 1 wherein

The throw position member establishes the rest position wherein the biasing member resists movement of the at least one throw during movement of the associated elevator car within a selected frequency range.

11. The elevator governor of claim 1 wherein

The initial position is at a first radial distance from a center of rotation of the adjuster;

the rest position is at a second radial distance from the center of rotation;

the second radial distance is greater than the first radial distance;

the activation position is at a third radial distance from the center of rotation; and is

The third radial distance is greater than the second radial distance.

12. An elevator governor, comprising:

at least one slinger configured to move into an activated position in response to elevator speed reaching a predefined threshold speed; and

a spring biasing the at least one flail from the activated position, the spring having a spring constant and an initial length, the spring constant and the initial length are configured to control movement of the at least one flyweight into the activated position, the spring being set to a second longer length in a zero speed state, wherein in a first range of elevator speeds between the zero speed condition and an intermediate elevator speed below the predefined threshold speed, the at least one slinger is maintained in a rest position corresponding to the second longer length, and wherein, in a second range of elevator speeds between the intermediate elevator speed and the predefined threshold speed, the spring extends to a third length that is longer than the second length when the at least one flail moves between the rest position and the activated position against the bias of the spring.

13. The elevator governor of claim 12 wherein the spring is configured to: allowing the at least one flyweight to reach the activated position when the elevator speed reaches the predefined threshold speed.

14. The elevator governor of claim 12, comprising a throw position member that sets a rest position of the at least one throw in the zero speed condition, wherein the rest position corresponds to the second length of the spring.

15. The elevator governor of claim 14 wherein

The movement of the at least one flail is limited to a range of motion between the rest position and the activated position; and is

The range of motion corresponds to a spring length between the second length and the third length.

16. The elevator governor of claim 14 wherein the throw position member is supported on the at least one throw.

17. The elevator governor of claim 12 wherein

The at least one flail block comprises a plurality of flail blocks;

the springs comprise a corresponding plurality of springs; and is

Each of the springs is coupled with a respective one of the flappers.

18. The elevator governor of claim 17, wherein the throw position member establishes the rest position wherein the spring resists movement of the at least one throw during movement of the associated elevator car within a selected frequency range.

19. The elevator governor of claim 12 wherein

The initial length of the spring corresponds to the at least one throw at a first radial distance from a center of rotation of the regulator;

the second length of the spring corresponds to the at least one throw at a second radial distance from the center of rotation;

the second radial distance is greater than the first radial distance;

the third length of the spring corresponds to the at least one throw at a third radial distance from the center of rotation; and is

The third radial distance is greater than the second radial distance.

Background

Elevator systems are widely used, for example, to carry passengers between floors in a building. Various types of elevator systems are known.

One of the features of an elevator system is to provide protection against over speed conditions. Elevator systems typically include an overspeed governor (governor) that operates in response to movement of the elevator car (car) above a predetermined threshold speed. In such cases, the modulator initiates (brake application) by activating a switch or moving a linkage.

Some low-to-mid (low-to-mid) weight elevator configurations may allow for natural or resonant frequencies associated with system rise (system rise), moving mass, suspension termination stiffness, and ropes supporting the elevator car. In some such systems, passengers in the elevator car have a way to jump or jump in a way that can induce (induce) vertical oscillations of the elevator car. When these oscillations are at or near the natural frequency of the system, the elevator car can jump sufficiently to activate the overspeed governor, resulting in an emergency stop of the elevator car. Stopping the car in this manner can interfere with the availability of the elevator car to provide service to other passengers. Further, such stops often require a mechanic to visit a site (site) to allow passengers to exit the car, reset the governor overspeed switch, and may require resetting of safeties (safeties) before placing the elevator car back in service.

Disclosure of Invention

The illustrated example elevator governor includes at least one flyweight (flyweight) configured to move a first distance between an initial position corresponding to a zero speed state and an activated position corresponding to an elevator speed reaching a predefined threshold. A biasing member biases the at least one flail towards the initial position. The biasing member is configured to: when the elevator speed reaches a predefined threshold, at least one throw block is allowed to reach an active position. The flail position member sets a rest position (rest position) of the at least one flail in a zero speed state between an initial position and an activated position. The range of motion of the at least one flail is limited to a second shorter distance between the rest position and the activated position.

An example embodiment having one or more features of the elevator governor of the preceding paragraph includes a sheave (shear) configured to move at a governor speed corresponding to an elevator speed. At least one throw is supported on the pulley for movement therewith and relative thereto within a range of motion.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the bump location member is secured to the sheave.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the bump location member is formed as part of a sheave.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the throw position member is supported on the at least one throw.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the at least one thrower remains in a stationary position within a first range of elevator speeds between a zero speed condition and an intermediate elevator speed below a predefined threshold. In a second range of elevator speeds between the intermediate elevator speed and a predefined threshold, the at least one thrower is moved against the bias of the biasing member between the rest position and the activated position.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the biasing member comprises a spring having a spring constant and a length to induce a tension selected to resist movement of the at least one thrower from the initial position to the activated position in the following manner: at least one throw block is allowed to reach an active position if the elevator speed reaches a defined threshold.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the spring has a first length corresponding to the at least one throw in the initial position, the first length corresponding to a first induced tension, the spring is stretched to a second length when the at least one throw is in the rest position, the second length being longer than the first length, the second length corresponding to a second induced tension higher than the first induced tension, the spring is further stretched to a third length when the at least one throw is in the activated position, and the third length being longer than the second length.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the at least one slinger comprises a plurality of slingers and the slinger position members comprise a corresponding plurality of position members that prevent the respective slinger from moving from the rest position toward the initial position.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the throw position member establishes a rest position in which the biasing member resists movement of the at least one throw during movement of the associated elevator car within the selected frequency range.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the initial position is at a first radial distance from a center of rotation of the governor, the resting position is at a second radial distance from the center of rotation, the second radial distance is greater than the first radial distance, the activated position is at a third radial distance from the center of rotation, and the third radial distance is greater than the second radial distance.

The illustrative example embodiment of an elevator governor includes at least one slinger configured to move into an activated position in response to an elevator speed reaching a predefined threshold speed. A spring biases the at least one flail away from the activated position. The spring has a spring constant and an initial length configured to control movement of the at least one flail into the activated position. In the zero speed condition, the spring is set to a second, longer length. In a first range of elevator speeds between a zero speed condition and an intermediate elevator speed below a predefined threshold speed, the at least one thrower is held in a rest position corresponding to the second longer length. In a second range of elevator speeds between the intermediate elevator speed and the predefined threshold speed, the spring is elongated to a third length that is longer than the second length when the at least one thrower is moved between the rest position and the activated position against the bias of the spring.

In an example embodiment having one or more features of the elevator governor of the previous paragraph, the spring is configured to: when the elevator speed reaches a predefined threshold speed, at least one flail is allowed to reach an active position.

Example embodiments having one or more features of the elevator governor of either of the preceding two paragraphs include a throw position member that sets a rest position of at least one throw in a zero speed condition. The rest position corresponds to the second length of the spring.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, movement of the at least one slinger is limited to a range of motion between the rest position and the activated position. The range of motion corresponds to a spring length between the second length and the third length.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the throw position member is supported on the at least one throw.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the at least one slinger comprises a plurality of slingers, the springs comprise a corresponding plurality of springs, and each of the springs is coupled with a respective one of the slingers.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the throw position member establishes a rest position in which the spring resists movement of the at least one throw during movement of the associated elevator car within the selected frequency range.

In an example embodiment having one or more features of the elevator governor of any of the preceding paragraphs, the initial length of the spring corresponds to the at least one throw being at a first radial distance (set) from a center of rotation of the governor, the second length of the spring corresponds to the at least one throw being at a second radial distance from the center of rotation, the second radial distance is greater than the first radial distance, the third length of the spring corresponds to the at least one throw being at a third radial distance from the center of rotation, and the third radial distance is greater than the second radial distance.

Various features and advantages of at least one example embodiment will become apparent to those skilled in the art from the following detailed description. The drawings that accompany the detailed description can be briefly described as follows.

Drawings

Fig. 1 schematically illustrates selected portions of an elevator system including a governor designed according to an embodiment of this invention.

Figure 2 diagrammatically illustrates a regulator device designed according to an embodiment of this invention.

FIG. 3 illustrates selected portions of the embodiment of FIG. 2 in one instance.

Fig. 4 shows the features of fig. 3 in another case.

Fig. 5 shows the features of fig. 2 and 3 in another case.

Detailed Description

Embodiments of the present invention provide an elevator governor that has a more consistent activation speed and is less sensitive to abnormal movement of the elevator car (e.g., oscillations or vibrations caused by passengers bouncing in the elevator car).

Fig. 1 schematically illustrates selected portions of an elevator system 20. Based on operation of a machine (machine)26 and a machine brake 28, the elevator car 22 is in motion along the guide rails 24, which occurs in a generally known manner. The governor 30 is associated with the elevator car or otherwise positioned within the hoistway (hoistway) such that the governor 30 operates based on the speed of movement of the elevator car 22. In the event that the elevator speed exceeds a predefined threshold, the governor 30 initiates the application of the safety brake 32 to stop the elevator car 22.

Fig. 2 illustrates an example embodiment of a regulator 30. A plurality of throws 34, 36 and 38 are supported on the sheave 40 to rotate with the sheave 40 about a central axis of rotation 42 as the elevator car 22 moves vertically along the guide rails 24. The throws 34, 36 and 38 are configured to move radially outward by an increasing amount in response to increasing elevator speed.

A plurality of springs 44, 46 and 48 are coupled to flappers 34, 36 and 38, respectively. Springs 44, 46 and 48 are biasing members that bias the flappers 34, 36 and 38, respectively, radially inward and resist radially outward movement of the flappers to control their respective positions at different elevator speeds.

The springs 44, 46 and 48 have a selected spring constant and initial length that induces a tension that, in combination with the configuration of the throws 34, 36 and 38, controls the radial movement of the throws to move into the activated position, wherein at least one of the throws activates the switch 50 by making contact with the switch contact 52 that changes the electrical state of the switch 50 when the elevator speed reaches a preselected or predefined threshold speed. If the elevator car speed reaches the threshold, the switch 50 operates to initiate a brake application of the machine brakes 28 to stop the elevator car 22.

While the example of fig. 2 includes a switch activation to initiate application of the machine brakes, other embodiments include the regulator 30 activating a mechanical linkage to initiate application of the safener 32.

The adjuster 30 includes a plurality of flail position members 60, the flail position members 60 setting or defining the rest position of the respective flail 34, 36 and 38. In the zero speed condition, the flappers 34, 36 and 38 are in a rest position, which is at least partially defined by the flapper position member 60. The throws 34, 36 and 38 remain in the rest position during a first range of elevator speeds between a zero speed condition and an intermediate speed less than a predefined threshold. When the elevator speed is in a second range between the intermediate speed and the predefined threshold speed, the throws 34, 36 and 38 move towards the activated position against the bias of the respective springs 44, 46 and 48. Maintaining the flail blocks 34, 36, and 38 in the rest position set by the flail block position member 60 or at least partially defined by the flail block position member 60 improves stability of the governor 30 and avoids false actuation situations where the flail blocks 34, 36, and 38 may move into the activated position in response to Abnormal Passenger Behavior (APB) that causes bouncing or vertical oscillation of the elevator car 22.

For example, an APB that includes a jump in the elevator car 22 may induce vibration or oscillation of the elevator car 22, which may cause the throws 34, 36, 38 to move outward into the activated position, actuating the switch contact 52, as the elevator car 22 moves at a speed above a predefined threshold speed. In some elevator systems, an APB in the frequency range of 2.5Hz to 5Hz may cause sufficient movement of the flail blocks 34, 36 and 38 to reach the activated position and contact the switch contacts 52. With the flail position member 60, the regulator 30 is more stable and the flail 34, 36, 38 remains in or very close to the rest position even during the APB state, which minimizes or avoids false activation of the switch 50. The flail position member 60 and the manner in which the flail 34, 36 and 38 are in the rest position effectively prevents false actuations and ensures that the flail 34, 36 and 38 reach the activated position only when the elevator car 22 has actually exceeded a predefined threshold speed.

Fig. 3 illustrates selected portions of the regulator 30, including the flappers 34, 36, and 38 and the spring 48. As can be appreciated from fig. 3, the respective reference points (locations) on the flappers 34, 36 and 38 are at a first distance D1 from the rotational axis 42. The position of the throws 34, 36 and 38 shown in fig. 3 corresponds to a spring having an initial length L1. The initial length of the springs 44, 46 and 48 is the design length that induces the first tension and together with the spring constant controls the movement of the flail in response to the rotation of the regulator 30 so that the flail reaches the activated position at the desired or designed threshold speed. The position shown in fig. 3 corresponds to the arrangement of the flappers 34, 36 and 38 relative to the axis of rotation 42 if no flappers position member 60 is provided on the adjuster 30. The position shown in fig. 3 is referred to within this specification as an initial position, including a first radial distance D1, an initial spring length L1, and a first induced tension.

Fig. 4 illustrates the position or arrangement of the flail 34, 36 and 38 relative to the axis of rotation 42 with the flail position member 60 in place. The flail position member 60 is not shown in fig. 4 to simplify the illustration. The flappers 34, 36 and 38 are in the rest position in fig. 4 with a second radial distance D2 between the reference point on each flapper and the axis of rotation 42. The second radial distance D2 is greater than the first radial distance D1 shown in fig. 3.

With the flappers 34, 36, and 38 in the rest position shown in fig. 4 (and fig. 2), the spring length of the spring 48 (and the springs 44 and 46 not specifically illustrated in fig. 4) is the second length L2. With the flappers 34, 36, and 38 in the rest position, the respective springs are partially stretched or elongated beyond the initial length L1 to a second longer length L2. With the spring at this second length, a second tension is induced and the spring provides a bias that maintains the respective flyweight in a rest position during a first range of elevator speeds (e.g., between zero and intermediate speeds). The second induced tension is higher than the first induced tension.

When the elevator speed exceeds the intermediate speed and approaches the predefined threshold speed, the throws 34, 36 and 38 move into the activated position shown in fig. 5 against the bias of the respective springs. In the activated position, the reference point on the respective flail is at a third radial distance D3 from the axis of rotation 42. The third radial distance D3 is greater than the second radial distance D2. In the activated position, the respective spring is extended or stretched to a third length L3, the third length L3 being greater than the second length L2. Only springs 48 are shown in fig. 5, although those skilled in the art will understand how all of the springs in the exemplary embodiment will be similarly extended to third length L3.

The flail position member 60 limits the range of motion of the flail 34, 36 and 38 to the distance of the difference between D3 and D2. This range of motion is over a shorter distance than the difference between D3 and D1. Similarly, the range of elongation or extension of springs 44, 46, and 48 is limited to the difference between L3 and L2, rather than the longer difference between L3 and L1. Maintaining the flail 34, 36 and 38 in a stationary position within the first range of elevator speeds enhances the stability and consistency of governor operation even though the combination of flail and spring is designed or initially selected to allow movement between an initial position and a stationary position.

By pre-stretching the springs 44, 46, and 48 to a second length L2 corresponding to the second induced tension and maintaining the flappers 34, 36, and 38 in a rest position defined at least in part by the flappers position member 60, resonance of the governor 30 is reduced or eliminated, otherwise the governor 30 may react to an APB causing bounce or vertical oscillation of the elevator car 22. The bump position member 60 effectively keeps the springs 44, 46 and 48 from responding to such oscillations of the elevator car 22. At the same time, the springs 44, 46, and 48 and the respective throws 34, 36, and 38 are able to respond to elevator speeds approaching a predefined threshold speed such that the governor 30 operates as intended to initiate machine brake activation in the event of an elevator overspeed condition.

In some example embodiments, the flail position member 60 is secured to a portion of the pulley 40 of the governor 30. Some embodiments include a flail location member 60 formed as part of the respective flail 34, 36 and 38. In other example embodiments, flail position members 60 are secured to flail blocks 34, 36 and 38, respectively.

The bump position member 60 can take a variety of shapes. One example embodiment includes a generally rectangular shaped stopper. Another example embodiment includes a stopper having a substantially cylindrical shape. In such embodiments, the flail position member 60 is made of a rigid material (e.g., plastic). The flail position members 60 in the different embodiments have different geometries and are made of different materials. The material selected for a particular embodiment is sufficiently rigid without introducing appreciable mass so that the flail position member 60 does not interfere with the intended centrifugal operation of the regulator 30.

For a first range of elevator speeds between a zero speed condition and an intermediate speed below the threshold governor activation speed, including the flail position member 60 and having the flail 34, 36 and 38 in the rest position between the initial position and the activated position facilitates more reliable governor operation and avoids governor-initiated brake application in response to vertical oscillations or bouncing of the elevator car caused by, for example, APB.

Regulators designed according to embodiments of the present invention will operate in the following manner: the slinger remains stationary in the rest position for a higher percentage of elevator retraction (contract) speed before any movement toward the activated position occurs. In some embodiments, the above-mentioned intermediate speed is slightly below the threshold speed. Some embodiments include: the flappers 34, 36 and 38 remain stationary in the rest position until a threshold speed is reached, at which time the flappers move into the activated position to initiate brake application.

The preceding description is exemplary rather than limiting in nature. For example, the number and type of flappers and the location of the flappers location members may be different compared to the illustrated example embodiment. Variations and modifications to the disclosed examples may become apparent to those skilled in the art that do not necessarily depart from the essence of this invention. The scope of legal protection given to this invention can only be determined by studying the following claims.