CN114772409B

CN114772409B - Rail speed limiter

Info

Publication number: CN114772409B
Application number: CN202210287073.8A
Authority: CN
Inventors: 黄瑞宁; 闫风华
Original assignee: Beijing Qinghua Dingde Technology Development Co ltd; Zhongxin Guoci Testing Co ltd
Current assignee: Beijing Qinghua Dingde Technology Development Co ltd; Zhongxin Guoci Testing Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2023-11-14
Anticipated expiration: 2042-03-22
Also published as: CN114772409A

Abstract

The disclosure relates to the field of climbing-free devices, in particular to a track speed limiter. The track speed limiter comprises an input end with a first rotation direction around a first shaft; a centrifugal device in powered connection with the input end and having a second rotational direction about a second axis, the second rotational direction being associated with the first rotational direction; characterized in that the centrifugal device comprises: a centrifugal block pivotally disposed on the centrifugal device to allow a free end of the centrifugal block to perform a centrifugal motion when the centrifugal device is rotated; an elastic member connected to the centrifugal block to apply elastic resistance against the centrifugal motion; and the sliding assembly is arranged on the centrifugal block and comprises a sliding rail and a sliding block, wherein the sliding rail extends from the pivot to the free end so as to allow the sliding block to move from the pivot to the free end when the centrifugal device rotates. The speed of the climbing-free device is controlled more reliably and rapidly through the arrangement of the track speed limiter.

Description

Rail speed limiter

Technical Field

The disclosure relates to the field of climbing-free devices, in particular to a track speed limiter.

Background

On a climbing-free device for a wind power tower drum lifter, a track speed limiting device is generally arranged to prevent casualties caused by out-of-control speed of the climbing-free device.

In the prior art, the swing arm anti-tilting type and centrifugal triggering type safety locking device is widely applied, and the working principle is that when the descending speed is too high due to the fact that a working steel wire rope is broken, a platform is tilted and the like, the speed limiter can automatically and rapidly lock the steel wire rope, so that the safety of operators is guaranteed. However, the steel wire rope is worn along with the increase of the service time, if the maintenance is not in place, the service life is shorter, and if the inspection is not in time, serious potential safety hazards can be generated.

Disclosure of Invention

The present disclosure is made in view of the above-mentioned needs of the prior art, and an object of the present disclosure is to provide a track speed limiter for controlling the speed of a climbing-free device more reliably and rapidly.

In order to solve the above problems, the technical solution provided by the present disclosure includes:

there is provided a track speed limiter comprising: an input having a first rotational direction about a first axis; a centrifugal device in powered connection with the input end and having a second rotational direction about a second axis, the second rotational direction being associated with the first rotational direction; the centrifugal device includes: a centrifugal block pivotally disposed on the centrifugal device to allow a free end of the centrifugal block to perform a centrifugal motion when the centrifugal device is rotated; an elastic member connected to the centrifugal block to apply elastic resistance against the centrifugal motion; and the sliding assembly is arranged on the centrifugal block and comprises a sliding rail and a sliding block, wherein the sliding rail extends from the pivot to the free end so as to allow the sliding block to move from the pivot to the free end when the centrifugal device rotates.

The arrangement is such that when the centrifugal block performs centrifugal movement, the slider can move along the slide rail from the pivot end to the free end so as to accelerate the free end to move away from the pivot end; and the centrifugal force applied to the free end is increased to a certain extent to overcome the elastic resistance, so that the effects of limiting the descending speed of the climbing-free device and guaranteeing the personal safety of staff are realized.

Preferably, the track speed limiter further comprises an output end having a third rotational direction about a third axis; the output end is arranged opposite to the centrifugal block, so that the output end is meshed with the centrifugal block when the centrifugal block centrifugally moves to a first position, and the output end is driven to rotate by a first angle.

Preferably, the first axis and the second axis are the same axis.

The arrangement can save space to a certain extent, and improve the space utilization rate and the energy transmission efficiency.

The speed limiting effect of the track speed limiter is achieved by driving the output end to rotate around the third shaft through the centrifugal block.

Preferably, a groove is formed in the bottom of the centrifugal block, and the sliding block is at least partially arranged in the groove.

The groove at the bottom of the centrifugal block can play a guiding role for the sliding block so as to prevent the sliding block from shaking in the motion, ensure smooth sliding and reduce the loss of force.

Preferably, the free end of the centrifugal block is provided with a first opening extending along the direction in which the sliding rail is located, the sliding rail is arranged in the first opening, a first plate is arranged outside the free end, and the first plate is matched with the output end.

Through will the first board sets up free end one side, when the centrifugal force that the free end received is greater than the spring resistance, the free end is thrown away, first board with the output looks adaptation is in order to drive the output.

Preferably, the free end of the centrifugal mass is adjacent to the pivot end of the other centrifugal mass; the two ends of the elastic piece are respectively connected with the free end of the centrifugal block and the pivot end of the other centrifugal block.

The centrifugal device can have uniform centrifugal force by the arrangement, so that the free ends of the centrifugal blocks can be uniformly thrown out, and reliable and stable torque is provided to drive the output ends to act. The elastic piece can be opposed to centrifugal force, and a certain degree of freedom is provided for speed limitation, so that the climbing-free device cannot work due to oversensitivity is prevented.

Preferably, the pivotally arranged on the centrifugal device comprises: the track speed limiter further comprises a first connecting piece, the first connecting piece comprises a connecting plate, the connecting plate is connected with the centrifugal block through a fixed shaft which is fixedly arranged on the connecting plate in a pivoted mode, and the centrifugal block is provided with a rotating direction which winds the fixed shaft.

The first connecting piece provides a space for the centrifugal device to move and ensures the freedom degree of the centrifugal block to pivot.

Preferably, the first connecting piece further comprises a connecting column, the connecting piece comprises a first connecting plate and a second connecting plate which are arranged up and down, and the connecting column is arranged between the first connecting plate and the second connecting plate to connect the first connecting plate and the second connecting plate; the connecting post is provided with a through hole extending along the first shaft direction, and the first shaft passes through the through hole so that the first connecting piece has a first rotating direction around the first shaft.

So set up so that first connecting piece can follow the first axle rotates, and then drives the centrifugal piece and rotate, provides power for the rotation of centrifugal piece.

Preferably, the output end comprises a first wheel, the centrifugal device is arranged inside the first wheel, teeth are arranged on the inner side of the first wheel and are matched with the first plate, and when the sliding block moves to the second position, the first plate is meshed with the teeth.

When the sliding block slides in the second position, the first plate on the outer side of the centrifugal block is meshed with the teeth to drive the output end to rotate by a first angle, so that the speed limit of the climbing-free device is realized.

Preferably, the output end has a first lever extending in a direction perpendicular to the direction in which the first shaft extends; the first lever is coupled to the first wheel and the first plate drives the first lever to rotate via the first wheel when the first plate is engaged with the teeth.

The arrangement is that when the centrifugal force received by the centrifugal block is larger than the elastic resistance, the centrifugal block is meshed with the teeth on the first plate arranged on one side of the free end so as to drive the wheel to rotate, and the wheel drives the first rod to rotate, so that the speed limiting effect of the climbing-free device is achieved.

Compared with the prior art, the centrifugal block is quickly opened by arranging the sliding component on the centrifugal block so as to accelerate the centrifugal block to be subjected to centrifugal force larger than spring resistance, so that the speed limiting function of the track is quickly realized; in addition, the centrifugal block is arranged on a first connecting piece which is driven by the first shaft to rotate so as to obtain rotation power; in addition, the centrifugal block is connected with the output end through the first wheel, and when the centrifugal block provides torque for the first wheel, the output end acts to limit the speed of the track.

Drawings

In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present description, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic perspective view of a portion of a track speed limiter of the present disclosure;

FIG. 2 is a schematic perspective view of yet another portion of the track speed limiter of the present disclosure;

FIG. 3 is a schematic perspective view of a portion of a track speed limiter at another angle of the present disclosure;

FIG. 4 is a schematic perspective view of a portion of a track speed limiter at yet another angle of the present disclosure;

FIG. 5 is an overall perspective view of the track speed limiter of the present disclosure;

FIG. 6 is a schematic perspective view of a base plate of the present disclosure;

FIG. 7 is a schematic perspective view of a first connector of the present disclosure;

FIG. 8 is a schematic perspective view of a centrifugal block of the present disclosure;

fig. 9 is a schematic diagram of an explosive structure of a track speed limiter of the present disclosure.

Reference numerals:

1. a bottom plate; 2. a housing; 201. a first surface; 3. a first bearing; 4. a second bearing; 5. a second wheel; 6. a first shaft; 7. a first connector; 8. a first connection plate; 9. a second connecting plate; 10. a connecting column; 11. perforating; 12. a second opening; 13. a fixed shaft; 15. a centrifugal block; 16. a third opening; 17. a pivot end; 18. a free end; 19. a slide rail; 20. a slide block; 21. a groove; 22. a first opening; 23. a first plate; 24. an elastic member; 26. a second connector; 27. a first lever; 28. a first wheel; 29. teeth; 29A, a first side; 29B, a second side; 30. a cover; 31. and a third axis.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In describing the embodiments of the present disclosure, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be construed broadly, for example, it may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection via an intermediary. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout the description to refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.

For the purpose of facilitating an understanding of the embodiments of the present application, reference will now be made to the following description of specific embodiments, taken in conjunction with the accompanying drawings, which are not intended to limit the embodiments of the application.

This embodiment provides a track speed limiter, see fig. 1-9.

The track speed limiter comprises a shell, an input end, a driving mechanism and an output end.

The shell comprises a bottom plate 1 and a shell 2, wherein the bottom plate 1 and the shell 2 are arranged opposite to each other, the bottom plate 1 is plate-shaped, and the shell 2 is cover-shaped to cover the bottom plate 1, and the bottom plate 1 and the shell 2 are mutually fixed to form a cavity together, referring to fig. 5 and 6. An opening is provided in the center of the base plate 1, and likewise, an opening is provided in the center of the first surface 201 of the housing 2 for the internal components to protrude. The base plate 1 and the housing 2 cooperate to achieve a substantially closed structure of the track speed limiter and to provide considerable strength and space for the components placed inside it to work stably.

Further, a first bearing 3 is disposed in the opening provided on the bottom plate 1, an outer side surface of the first bearing 3 is fixed with an inner side surface of the opening of the bottom plate 1, and the inner side surface and the outer side surface of the first bearing 3 can rotate relatively, so that when a certain shaft passes through the first bearing 3 and rotates, the inner side surface of the first bearing 3 rotates along with the rotation of the shaft, and an outer side surface of the first bearing does not rotate along with the rotation of the shaft, so that the bottom plate 1 is not driven to rotate along with the rotation of the shaft passing through the first bearing 3.

Likewise, the second bearing 4 is also provided inside the opening provided in the first surface 201 of the housing 2, which is the same as the first bearing 3 provided inside the opening of the base plate 1, so that the housing 2 does not rotate as it rotates when the shaft passing through the second bearing 4 rotates. Thereby allowing the housing to remain stationary to reduce wear on the track speed limiter.

An input comprising a second wheel 5 and a first shaft 6.

The center of the second wheel 5 is provided with a through hole, and the first shaft 6 passes through the hole on the second wheel 5 and is fixedly connected with the second wheel 5. Further, the second wheel 5 is attached to the guide rail, and when the climbing-free device moves downwards along the guide rail, the second wheel 5 rotates along the guide rail, so that the first shaft 6 passing through the middle of the second wheel 5 rotates along with the rotation of the second wheel 5. Still further, the second wheel 5 has a first direction of rotation about the first axis 6.

The second wheel 5 is arranged below the base plate 1, and the first axle 6 passing through the second wheel 5 continues through the opening provided in the base plate 1. Further, the first shaft 6 passes through the first bearing 3, when the first shaft 6 rotates, the inner side of the first bearing 3 follows the first shaft 6 to maintain the degree of freedom of the rotation of the first shaft 6, and the outer side of the first bearing 3 is fixed relative to the base plate 1. So set up, be favorable to track overspeed governor and exempt from to climb the fixed of ware to make under the circumstances that first axle 6 keeps rotating, bottom plate 1 is fixed unchanged, and can not produce great resistance to the rotation of first axle 6.

A drive mechanism comprising a first connection 7 and a centrifugal device.

Referring to fig. 7, the first connector 7 includes a connection plate and a connection post 10, the connection plate includes a first connection plate 8 and a second connection plate 9 disposed opposite to each other, and the first connection plate 8 and the second connection plate 9 are connected by the connection post 10. The first connecting plate 8 and the second connecting plate 9 are the same in size and shape, and the planes of the first connecting plate 8 and the second connecting plate are parallel to each other. The connecting post 10 is perpendicular to the plane of the first connecting plate 8 and the second connecting plate 9, and connects the center of the first connecting plate 8 and the center of the second connecting plate 9.

A through hole 11 penetrating through the upper and lower connecting plates is arranged in the connecting column 10, and the through hole 11 is matched with the first shaft 6 so that the first shaft 6 extending into the shell passes through the through hole 11. Accordingly, when the first shaft 6 rotates, the first coupling member 7 rotates together with the first shaft 6.

Referring to fig. 4 and 8, the connection plates are provided with second openings 12 distributed around the through holes 11, and the adjacent second openings 12 are spaced by the same distance, and further, the two connection plates have the same structure, that is, the second openings 12 on the two connection plates correspond to each other. Still further, the first connecting piece 7 further includes a fixing shaft 13, two ends of the fixing shaft 13 are respectively and fixedly connected with the two second openings 12 disposed up and down, and an extending direction of the fixing shaft 13 is the same as an extending direction of the connecting post 10.

In one embodiment of the present example, two second openings 12 are provided on both the first connection plate 8 and the second connection plate 9, which are symmetrical about the perforation 11. Correspondingly, the first connecting piece 7 comprises two fixing shafts 13, one end of each fixing shaft 13 is fixed with one second opening 12 of the first connecting plate 8 positioned above, the other end of each fixing shaft 13 is fixed with one second opening 12 of the second connecting plate 9 positioned below, and the fixing shafts 13 are perpendicular to the connecting plates.

And a centrifugal device in dynamic connection with the input end and provided with a second rotation direction around a second shaft, wherein the second rotation direction is related to the first rotation direction. Preferably, the first shaft 6 and the second shaft are the same shaft, so that the transmission of force is facilitated, the waste of force is avoided, and the structure can be effectively simplified.

Referring to fig. 2 and 3, the centrifugal device is disposed in a space between the two connection plates, the centrifugal device includes a centrifugal block 15, the centrifugal block 15 has two ends, a third opening 16 is disposed on the centrifugal block 15 near one end thereof, the third opening 16 extends in a direction perpendicular to the connection plates, the centrifugal block 15 pivotally passes through a fixed shaft 13 through the third opening 16, the end is a pivot end 17, and the fixed shaft 13 rotates relatively in the third opening 16.

The other end of the centrifugal mass 15 is a free end 18, which free end 18 moves away from the pivot end 17 due to centrifugal force when the rotational speed of the first shaft 6 exceeds a first value.

The centrifugal block 15 further includes a sliding assembly, and the centrifugal block 15 has a receiving space to be able to place the sliding assembly in the receiving space. The sliding assembly comprises a sliding rail 19 and a sliding block 20, wherein the sliding rail 19 extends from the pivot end 17 to the free end 18, an opening is formed in the sliding block 20, the sliding rail 19 passes through the opening to provide a sliding path for the sliding block 20, and the sliding block 20 can slide relatively on the sliding rail 19. In order to enable the sliding block 20 to slide along the extending direction of the sliding rail 19 without rotating relative to the sliding rail 19, a groove 21 is provided at the bottom of the centrifugal block 15, the groove 21 has the same extending direction as the sliding rail 19, and the groove 21 is adapted to the sliding block 20. Under the combined action of the sliding rail 19 and the groove 21, when the sliding block 20 slides along the extending direction provided by the sliding rail 19 and the groove 21, no relative rotation shake is generated, so that smooth sliding is ensured. When the creeper falls too fast, the slider 20 can provide assistance to the centrifugal block 15 to open quickly, thereby enabling the rail speed limiter to act to lock the creeper.

Further, when the rotational speed of the first shaft 6 exceeds a first value, the slider 20 slides towards the free end 18, so that the free end 18 is subjected to a greater centrifugal force and opens faster relative to the pivot end 17.

In order to firmly arrange the sliding assembly in the centrifugal block 15, the pivot end 17 and the free end 18 of the centrifugal block 15 are provided with openings along the same extension direction as the extension direction of the sliding rail 19, the opening provided at the free end 18 is a first opening 22, the outer side of the free end 18 is provided with a first plate 23, the first plate 23 can block the first opening 22, and the first plate 23 is larger than the area of the free end 18, and the larger part is engaged with the output end when the centrifugal motion is performed. This arrangement prevents, on the one hand, the centrifugal mass 15 from being thrown away by centrifugal forces in its interior, and on the other hand the first plate 23 increases the weight of the free end 18, so that the free end 18 of the centrifugal mass 15 moves more easily and more quickly away from the pivot end 17.

A plurality of centrifugal blocks 15 can be arranged on the first connecting piece 7, and the arrangement mode of the centrifugal blocks 15 is as follows: the pivot end 17 of one of the centrifugal masses 15 is adjacent to the free end 18 of one of the other centrifugal masses 15. In one implementation of this example, the centrifugal device comprises two centrifugal masses 15, a first centrifugal mass and a second centrifugal mass, respectively, the pivot end 17 of the first centrifugal mass being arranged adjacent to the free end 18 of the second centrifugal mass, and the free end 18 of the first centrifugal mass being arranged adjacent to the pivot end 17 of the second centrifugal mass.

The centrifugal device further comprises an elastic piece 24, and two ends of the elastic piece 24 are respectively connected with the pivot ends 17 and the free ends 18 of the two adjacent centrifugal blocks 15 to provide a certain elastic resistance. In one implementation of this embodiment, the centrifugal device includes two elastic members 24, which are a first elastic member and a second elastic member, where two ends of the first elastic member are respectively connected to the pivot end 17 of the first centrifugal block and the free end 18 of the second centrifugal block, and two ends of the second elastic member are respectively connected to the free end 18 of the first centrifugal block and the pivot end 17 of the second centrifugal block. Specifically, when the rotational speed of the first shaft 6 reaches a first value, the free end 18 of the centrifugal mass 15 is subjected to centrifugal force thrown outward and elastic resistance provided by the elastic member 24. The free end 18 of the centrifugal mass 15 provides a force which can oppose the centrifugal force in a direction opposite to the direction of the elastic resistance. When the elastic resistance provided by the elastic member 24 can counteract the centrifugal force, the free end 18 of the centrifugal mass 15 will continue to move as it is, and when the maximum elastic resistance provided by the elastic member 24 cannot counteract the centrifugal force, the free end 18 of the centrifugal mass 15 will move away from the pivot end 17.

An output comprising a second connector 26 and a first rod 27. The output end is connected to the housing 2 and the second connector 26 comprises a first wheel 28 and a cover 30.

A first wheel 28, said first wheel 28 being provided with teeth 29 on the inside. Further, the teeth 29 comprise a first edge 29A and a second edge 29B, the second edge 29B being perpendicular to the tangent of the wheel at the location where it is located, so arranged that the wheel is more firmly and conveniently engaged with the free end 18 of the centrifugal mass 15.

Furthermore, the wheel is arranged outside the first connection piece 7 and in a second position of the centrifugal mass 15, which second position does not exceed the top surface of the centrifugal mass 15 nor the bottom surface of the centrifugal mass 15, i.e. in a position where the wheel is nested on the side surface of the centrifugal mass 15 to be thrown out when the free end 18 of the centrifugal mass 15 is subjected to a certain amount of centrifugal force, the centrifugal mass 15 being in a first position, in which the first plate 23 is in engagement with the teeth 29. Specifically, the first plate 23 contacts the second edge 29B and rotates the wheel, and the centrifugal mass 15 provides the first wheel 28 with its rotational torque.

The first wheel 28 further comprises a cover 30, one end of the cover 30 being connected to the first wheel 28 and the other end being connected to the third axle 31. The cover 30 is arranged on the wheel, the third shaft 31 is arranged on the cover 30, the wheel is fixedly connected with the cover 30, and the cover 30 is fixedly connected with the third shaft 31. The line connecting the center of the wheel with the center of the cover 30 coincides with the third axis 31. When the centrifugal mass 15 drives the wheel to rotate, the wheel rotates around the line where the third shaft 31 is located, and the third shaft 31 rotates around its center line. The height of the housing 2 is greater than the height of the shroud 30 so that the wheel overhangs around the centrifugal mass 15. The height of the housing 2 is greater than the height of the first wheel 28 so that the wheel is suspended around the centrifugal mass 15.

The first rod 27 is fixedly connected to the third shaft 31 of the second connector 26, and extends in a direction perpendicular to the extending direction of the third shaft 31. When the third shaft 31 rotates, the first rod 27 rotates around its connection point with the third shaft 31 as a center and its own length as a radius.

The third shaft 31 protrudes outside the housing 2 through an opening portion provided on the first surface 201 of the housing 2, and the third shaft 31 is connected with the opening of the first surface 201 through the second bearing 4. Specifically, when the third shaft 31 rotates, the housing 2 does not rotate with its rotation, and remains fixed to the base plate 1. The first lever 27 is arranged outside the housing 2, and the rail speed limiter limits the speed of the rail by rotation of the first lever 27 about the third axis 31.

The track speed limiter only plays a role in the descending process of the climbing-free device. The input end also has a fourth rotational direction about the first axis 6, which is opposite to the fourth rotational direction. When the climbing-free device ascends along the track, the input end rotates around the first shaft 6 in the fourth rotation direction, at this time, the sliding block 20 inside the centrifugal block 15 is placed at the pivot end 17, the centrifugal block 15 arranged on the first connecting piece 7 rotates along with the ascending speed of the climbing-free device, and when the climbing-free device ascends at a normal speed, the centrifugal block 15 is stressed and balanced and cannot mesh with the wheel; when the climbing-free device rises at a higher speed, the free end 18 of the centrifugal block 15 may be subjected to a centripetal force approaching the pivot end 17, and when the centripetal force is the same as the spring resistance, the centrifugal block 15 is installed to rotate in the original movement direction; when the centrifugal force is greater than the spring resistance, the free end 18 of the centrifugal mass 15 will move towards its pivot end 17, in which case the centrifugal mass 15 will not engage the wheel. That is, during the ascent of the creeper, the centrifugal block 15 is not engaged with the teeth 29 provided on the wheel regardless of the force applied thereto, and the first lever 27 does not generate a motion preventing the creeper from continuing to operate regardless of the value of the ascent speed of the creeper.

When the climbing-free device descends, two conditions are divided into a case that the climbing-free device descends at a normal operation speed and a case that the climbing-free device descends at a faster speed in a out-of-control manner. When the climbing-free device descends at a normal running speed, the second wheel 5 drives the first shaft 6 to rotate through friction with the track, the first shaft 6 is fixedly connected with the first connecting piece 7, so that the first connecting piece 7 rotates around the first shaft 6 and drives the centrifugal block 15 arranged on the first connecting piece 7, at the moment, the centrifugal block 15 is stressed and balanced, the centrifugal force born by the free end 18 is the same as the centripetal force, or the centrifugal force born by the free end 18 is the same as the sum of the centripetal force and the spring resistance born by the free end, so that the free end 18 is not meshed with teeth 29 arranged on the wheel when rotating, the wheel is not rotated, and the first rod 27 is not rotated. When the climbing-free device is out of control and descends at a higher speed, the second wheel 5 rotates at a higher speed than normal, the centrifugal block 15 is driven to rotate by the first shaft 6, the sliding block 20 in the centrifugal block 15 is subjected to centrifugal force, the pivot end 17 moves towards the free end 18, so that the free end 18 is subjected to larger centrifugal force to exceed elastic resistance provided by the spring, the free end 18 moves towards a direction away from the pivot end 17 under the condition that the free end 18 is stressed in an unbalanced manner, the free end 18 is thrown away, the sliding block 20 moves to a second position, the centrifugal block 15 moves to the first position and is meshed with the teeth 29 of the first wheel 28, torque is provided for the wheel to drive the wheel to rotate, and the first rod 27 rotates by a first angle to realize speed limitation of the climbing-free device through cooperation with a track, and safety of workers is further ensured.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.

Claims

1. A track speed limiter comprising:

an input having a first rotational direction about a first axis;

a centrifugal device in powered connection with the input end and having a second rotational direction about a second axis, the second rotational direction being associated with the first rotational direction;

characterized in that the centrifugal device comprises:

a centrifugal block pivotally disposed on the centrifugal device to allow a free end of the centrifugal block to perform a centrifugal motion when the centrifugal device is rotated; an elastic member connected to the centrifugal block to apply elastic resistance against the centrifugal motion; a sliding assembly disposed on the centrifugal block and including a slide rail and a slider, the slide rail extending from the pivot shaft toward the free end to allow the slider to move from the pivot shaft toward the free end when the centrifugal device is rotated;

the track speed limiter further comprises an output end with a third rotation direction around a third shaft;

the output end is arranged opposite to the centrifugal block, so that the output end is meshed with the centrifugal block when the centrifugal block centrifugally moves to a first position, and the output end is driven to rotate by a first angle.

2. A track speed limiter according to claim 1 wherein,

the first axis and the second axis are the same axis.

3. A track speed limiter according to claim 1 wherein,

the bottom of the centrifugal block is provided with a groove, and the sliding block is at least partially arranged in the groove.

4. A track speed limiter according to claim 1 wherein,

the free end of the centrifugal block is provided with a first opening extending along the direction of the sliding rail, the sliding rail is arranged in the first opening,

the free end is externally provided with a first plate, which is adapted to the output end.

5. A track speed limiter according to claim 1 wherein,

the free end of the centrifugal block is adjacent to the pivot end of the other centrifugal block;

the two ends of the elastic piece are respectively connected with the free end of the centrifugal block and the pivot end of the other centrifugal block.

6. A track speed limiter in accordance with claim 1 wherein said pivotally disposed on said centrifugal device comprises:

the track speed limiter further comprises a first connecting piece, the first connecting piece comprises a connecting plate, the connecting plate is connected with the centrifugal block through a fixed shaft which is fixedly arranged on the connecting plate in a pivoted mode, and the centrifugal block is provided with a rotating direction which winds the fixed shaft.

7. A track speed limiter according to claim 6 wherein,

the first connecting piece further comprises a connecting column, the connecting piece comprises a first connecting plate and a second connecting plate which are arranged up and down, and the connecting column is arranged between the first connecting plate and the second connecting plate to connect the first connecting plate and the second connecting plate; the connecting post is provided with a through hole extending along the first shaft direction, and the first shaft passes through the through hole so that the first connecting piece has a first rotating direction around the first shaft.

8. A track speed limiter according to claim 4 wherein,

the output end comprises a first wheel which,

the centrifugal device is arranged inside the first wheel, teeth are arranged on the inner side of the first wheel and are matched with the first plate, and when the sliding block moves to the second position, the first plate is meshed with the teeth.

9. A track speed limiter according to claim 8 wherein,

the output end is provided with a first rod which extends along the direction perpendicular to the extending direction of the first shaft;

the first lever is coupled to the first wheel and the first plate drives the first lever to rotate via the first wheel when the first plate is engaged with the teeth.