CN111532928A

CN111532928A - Lifting equipment, safety device and limiting mechanism

Info

Publication number: CN111532928A
Application number: CN202010236273.1A
Authority: CN
Inventors: 刘术棠; 卢晓民; 谢炜; 聂励鹏
Original assignee: Hitachi Elevator China Co Ltd
Current assignee: Hitachi Elevator China Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-08-14
Anticipated expiration: 2040-03-30
Also published as: CN111532928B

Abstract

The invention discloses a lifting device, a safety device and a limiting mechanism, wherein the limiting mechanism comprises: the rope sheave driving device comprises a mounting piece, a limiting piece and a transmission piece, wherein the limiting piece is movably arranged on the mounting piece, the limiting piece is provided with a first limiting part used for limiting rotation or reverse rotation of a rope sheave, and the transmission piece is provided with a connecting part used for being in transmission connection with a limiter and a matching body arranged at intervals with the connecting part; when the transmission piece is positioned at the first position, the matching body is matched with the limiting piece, so that the first limiting part is staggered with the rope wheel; when the transmission piece is located at the second position, the matching body and the limiting piece are staggered, and the first limiting part is in locking fit with the rope wheel. The limiting mechanism can prevent the rope wheel from rotating or reversing, and further can avoid abnormal resetting of the speed limiter. The safety device adopts the limiting mechanism, so that abnormal resetting of the speed limiter can be avoided, and the safety of operation of the lifting equipment is improved. This jacking equipment has adopted this safety device, and the security is higher, is favorable to improving jacking equipment reliability of operation.

Description

Lifting equipment, safety device and limiting mechanism

Technical Field

The invention relates to the technical field of lifting equipment, in particular to lifting equipment, a safety device and a limiting mechanism.

Background

With the popularization of lifting equipment (such as elevators), more and more potential safety hazards are exposed. In order to improve the safety performance of the operation of the lifting equipment, higher requirements are put on the safety system of the lifting equipment.

Safety tongs and a speed limiter are often used for the lifting equipment to ensure the running safety of the equipment, and the safety tongs and the speed limiter can make a car of the lifting equipment brake emergently after exceeding a certain speed so as to prevent extreme accidents such as free falling of the car and the like.

The current mainstream governor structure is a shoe governor. The shoe type speed limiter is simple in structure, can be automatically reset in a reverse rotation mode, and can meet the use requirement of no machine room. However, the boot-type speed limiter is abnormally reset, so that the speed limit is invalid, and potential safety hazards exist.

Disclosure of Invention

In view of the above, it is desirable to provide a lifting device, a safety device and a limiting mechanism. The limiting mechanism can prevent the rope wheel from rotating or reversing, further can offset the impact force transmitted to the steel wire rope, and avoids abnormal resetting of the speed limiter. The safety device adopts the limiting mechanism, so that abnormal resetting of the speed limiter can be avoided, and the safety of operation of the lifting equipment is improved. This jacking equipment has adopted this safety device, and the security is higher, is favorable to improving jacking equipment reliability of operation.

The technical scheme is as follows:

in one aspect, the present application provides a stop mechanism, including: the rope sheave driving device comprises a mounting piece, a limiting piece and a transmission piece, wherein the limiting piece is movably arranged on the mounting piece, the limiting piece is provided with a first limiting part used for limiting rotation or reverse rotation of a rope sheave, and the transmission piece is provided with a connecting part used for being in transmission connection with a limiter and a matching body arranged at intervals with the connecting part; when the transmission piece is positioned at the first position, the matching body is matched with the limiting piece, so that the first limiting part is staggered with the rope wheel; when the transmission piece is located at the second position, the matching body and the limiting piece are staggered, the limiting piece is located at a locking state, and the first limiting part is in locking fit with the rope wheel.

When the limiting mechanism is applied to, the transmission piece is in transmission connection with the speed limiter through the connecting portion, and the speed limiting action of the speed limiter is utilized to drive the transmission piece to move, so that the transmission piece can move from the first position to the second position. In addition, the first stopper portion can restrict reverse rotation of the sheave. Specifically, when the governor is in a non-triggered state (i.e., a non-operational state), the transmission is in a first position; at the moment, the matching body is matched with the limiting part, so that the first limiting part and the rope wheel are staggered, and the rope wheel can rotate forwards and backwards to drive the lift car to move. When the speed limiter is triggered due to overspeed of the lift car or other reasons, the driving piece is driven to move from the first position to the second position, and the limiter is in a working state; at the moment, the matching body and the limiting piece are staggered, the limiting piece is in a locking state, and the first limiting part is in locking fit with the rope pulley, so that the rope pulley cannot rotate or cannot rotate reversely. The limiting mechanism can prevent the rope wheel from rotating or reversing, further can offset the impact force transmitted to the steel wire rope, and avoids abnormal resetting of the speed limiter.

The technical solution is further explained below:

in one embodiment, the limiting member can be elastically reset and pressed on the mounting member; when the limiting piece is in a locking state, the limiting piece is in a reset position.

In one embodiment, the limiting mechanism further includes a guide member fixedly disposed on the mounting member, and a first elastic pressing member sleeved on the guide member, the limiting member is movably connected with the guide member, one end of the first elastic pressing member is fixedly connected with or abuts against the guide member, and the other end of the first elastic pressing member is fixedly connected with or abuts against the limiting member.

In one embodiment, the number of the guide members is two, the guide members are arranged on the mounting member at intervals, the limiting members are respectively connected with the two guide members in a sliding manner, and the limiting members can move along the length direction of the guide members.

In one embodiment, the limiting member is rotatably disposed on the mounting member, and a second elastic pressing member is disposed between the limiting member and the mounting member.

In one embodiment, the first limiting part is in a hook shape and is arranged towards the mounting part; the limiting piece is provided with a lifting part, and the lifting part is arranged on the opposite side of the first limiting part.

In one embodiment, the fitting body may be inserted between the limiting member and the mounting member, and the fitting body is a protruding structure.

In one embodiment, the limiting member is magnetically engaged with the mounting member, the engaging member is insertable between the limiting member and the mounting member, and the engaging member is a protrusion.

On the other hand, the application also provides a safety device, which comprises the limiting mechanism in any embodiment, the safety device also comprises an installation unit, a rope wheel and a limiter, wherein the rope wheel can be rotatably arranged on the installation unit; when the clamping block is in a non-working state, the rope clamping groove is opened, and the transmission piece is in a first position; when the clamping block is in a working state, the rope clamping groove is clamped, and the transmission piece is in the second position.

When the safety device is used, the transmission piece is in transmission connection with the clamping block through the connecting part, and the speed-limiting action of the speed limiter is utilized to drive the transmission piece to move, so that the transmission piece can move from a first position to a second position. In addition, the first stopper portion can restrict reverse rotation of the sheave. Specifically, when the speed limiter is in a non-triggering state (namely a non-working state), and the clamping block is in a non-working state, the rope clamping groove is opened, and the transmission piece is in a first position; at the moment, the matching body is matched with the limiting part, so that the first limiting part and the rope wheel are staggered, and the rope wheel can rotate forwards and backwards to drive the lift car to move. When the elevator car is overspeed or other reasons, the speed limiter is triggered to drive the transmission piece to move from the first position to the second position, and the clamping block is in a working state, the rope clamping groove clamps the traction rope on the rope pulley; at the moment, the matching body and the limiting piece are staggered, and the limiting piece is in a locking state, so that the first limiting part is in locking fit with the rope pulley. This stop gear can prevent that the rope sheave from rotating or reversing for the rope sheave can not rotate or can not reverse, and then can offset the impact force of transmitting for wire rope, avoids the overspeed governor to reset unusually. The safety device adopts the limiting mechanism, so that abnormal resetting of the speed limiter can be avoided, and the safety of operation of the lifting equipment is improved.

On the other hand, the application also provides a lifting device, which comprises the safety device. This jacking equipment has adopted this safety device, and the security is higher, is favorable to improving jacking equipment reliability of operation.

Drawings

FIG. 1 is a schematic diagram of a security device in one embodiment;

FIG. 2 is a schematic view of the security device of FIG. 1 with the mounting unit concealed;

FIG. 3 is an enlarged partial schematic view of A shown in FIG. 2 (with the transmission member in a first position);

FIG. 4 is a schematic view of the transmission member shown in FIG. 3;

fig. 5 is a schematic top view of the safety device shown in fig. 1.

Description of reference numerals:

100. a limiting mechanism; 110. a mounting member; 120. a limiting member; 122. a first limiting part; 124. a pulling section; 130. a transmission member; 132. a connecting portion; 134. a mating body; 102. a guide portion; 140. a guide member; 150. a first elastic pressing member; 200. a mounting unit; 210. a first avoidance slot; 220. a second avoidance slot; 300. a stopper; 310. a clamping block; 312. a brake shoe; 320. a ratchet wheel; 330. a connecting rod; 340. a spring seat; 342. a brake spring; 400. a sheave; 410. a second limiting part; 500. rope clamping grooves.

Brief description of the drawingsthe accompanying drawings, which form a part of this application, are included to provide a further understanding of the invention, and are included to explain illustrative embodiments of the invention and the description thereof and are not to be considered limiting of the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

With the popularization of lifting equipment (such as elevators), more and more potential safety hazards are exposed. In order to improve the running safety performance of the lifting equipment, higher requirements are put forward on the safety device of the lifting equipment.

The current mainstream governor structure is a shoe governor. The shoe type speed limiter is simple in structure, can be automatically reset in a reverse rotation mode, and can meet the use requirement of no machine room. However, under the condition that the car and the counterweight can be linked, when the elevator goes down to overspeed and causes the braking of the safety tongs, the counterweight can continuously throw up and fall down under the action of inertia, the impact force generated when the counterweight falls down is transmitted through the main steel wire rope, the car moves up, the shoe type speed limiter reversely moves and is abnormally reset, the speed limit is failed, and potential safety hazards exist.

Accordingly, there is a need for a limiting mechanism that can prevent the sheave from rotating or reversing, and can offset the impact force transmitted to the wire rope, thereby preventing the speed governor from being abnormally reset.

To better describe the limiting mechanism, its application to a safety device is described.

As shown in fig. 1, in an embodiment, a safety device capable of avoiding abnormal reset of a speed governor and improving the operation safety of a lifting device is provided. The mounting device includes the aforementioned stopper mechanism 100, the mounting unit 200, the sheave 400 rotatably mounted on the mounting unit 200, and the stopper 300.

As shown in fig. 2 and 3, the stopper mechanism 100 includes: the rope sheave 400 comprises a mounting piece 110, a limiting piece 120 and a transmission piece 130, wherein the limiting piece 120 is movably arranged on the mounting piece 110, the limiting piece 120 is provided with a first limiting part 122 used for limiting the rotation or reverse rotation of the rope sheave 400, and the transmission piece 130 is provided with a connecting part 132 used for being in transmission connection with the limiting piece 300 and a matching body 134 arranged at an interval with the connecting part 132; when the transmission member 130 is located at the first position, the engaging body 134 engages with the limiting member 120, so that the first limiting portion 122 is staggered from the sheave 400; when the transmission member 130 is at the second position, the engaging body 134 is staggered from the limiting member 120, the limiting member 120 is in a locked state, and the first limiting portion 122 is in stop-fit with the sheave 400.

As shown in fig. 1 and 5, the mounting member 110 and the stopper 300 are installed in the mounting unit 200, the sheave 400 is provided with a plurality of second limiting portions 410 arranged at intervals along the circumferential direction thereof, the second limiting portions 410 are in limiting fit with the first limiting portions 122, the stopper 300 includes a clamping block 310 which is matched with the sheave 400 to form a rope clamping groove 500, the clamping block 310 is movably installed on the mounting unit 200, and the clamping block 310 is in transmission connection with the connecting portion 132; when the clamping block 310 is in a non-working state, the rope clamping groove 500 is opened, and the transmission member 130 is in a first position; when the clamping block 310 is in the working state, the rope clamping groove 500 is clamped, and the transmission member 130 is in the second position.

When the safety device is used, the transmission piece 130 is in transmission connection with the clamping block 310 through the connecting part 132, and the speed-limiting action of the speed limiter is utilized to drive the transmission piece 130 to move, so that the transmission piece 130 can move from a first position to a second position. Further, the first stopper 122 can restrict reverse rotation of the sheave 400. Specifically, when the speed governor is in a non-triggered state (i.e., a non-operating state) and the clamping block 310 is in a non-operating state, the rope clamping groove 500 is opened, and the transmission member 130 is in a first position; at this time, the engaging body 134 engages with the limiting member 120, so that the first limiting portion 122 is staggered from the rope pulley 400, and the rope pulley 400 can rotate forward and backward to drive the car to move. When the speed limiter is triggered to drive the transmission element 130 to move from the first position to the second position due to over-speed of the car or other reasons, and the clamping block 310 is in a working state, the rope clamping groove 500 clamps the traction rope on the rope pulley 400; at this time, the engaging body 134 and the limiting member 120 are staggered, and the limiting member 120 is in a locked state, so that the first limiting portion 122 is in stop fit with the sheave 400. Thus, the limiting mechanism 100 can prevent the rope pulley 400 from rotating or reversing, so that the rope pulley 400 cannot rotate or reverse, further the impact force transmitted to the steel wire rope can be offset, and the abnormal resetting of the speed limiter is avoided. And the safety device adopts the limiting mechanism 100, so that abnormal resetting of the speed limiter can be avoided, and the operation safety of the lifting equipment can be improved.

The specific structure of the "governor" can be realized in the related art as long as the above requirements are satisfied.

As shown in fig. 1 and 5, in an embodiment, the stopper 300 is a shoe type speed limiter, and includes a ratchet 320, a connecting rod 330 and a spring seat 340, the ratchet 320 is hinged to the connecting rod 330, the ratchet 320 can drive the connecting rod 330 to move, the spring seat 340 is installed at an end of the connecting rod 330, a braking spring 342 is installed on the spring seat 340, the other end of the braking spring 342 is installed on the clamping block 310, and the clamping block 310 is rotatably installed on the installation unit 200. When the speed limiter acts, the ratchet wheel 320 rotates to drive the connecting rod 330 to move, the connecting rod 330 compresses the brake spring 342 after rotating, the brake spring 342 presses the clamping block 310 to rotate, the clamping block 310 inclines towards one side of the rope wheel 400, and the rope clamping groove 500 is clamped to press the steel wire rope on the rope wheel 400.

Note that "the clamp block 310 is movably attached to the mounting unit 200" includes direct mounting and indirect mounting.

Alternatively, as shown in fig. 3, in an embodiment, the clamping block 310 includes a detachable brake shoe 312, and the brake shoe 312 is spaced apart from the sheave 400 to form the rope clamping groove 500. Thus, the clamping force can be maintained only by replacing the brake shoe 312.

The embodiments of the "mounting unit 200" include, but are not limited to, mounting frames, mounting seats, mounting blocks, mounting boxes, and the like, as long as the above requirements are satisfied.

It should be noted that, the embodiments of the "limiting member 120 is in the locking state" include, but are not limited to, a magnetic attraction reset lock, an elastic reset lock, a ratchet 320 mechanism lock, etc., as long as the requirements can be met.

In addition, "preventing reverse rotation of the sheave 400" means that the rotational direction of the sheave 400 does not cause the stopper 300 to be abnormally returned when the governor operates. Specifically, in the present embodiment, as shown in the figure, when the speed governor is operated, the sheave 400 can only rotate clockwise and cannot rotate reversely counterclockwise

Optionally, in an embodiment, the limiting member 120 can be elastically restored to be pressed on the mounting member 110; when the limiting member 120 is in the locked state, the limiting member 120 is in the reset position. Thus, the limiting member 120 can automatically elastically return to lock, so that the first limiting portion 122 is in locking engagement with the sheave 400, and the sheave 400 cannot rotate or reverse. The scheme is easy to implement, and is safe and reliable.

Specifically, when the transmission member 130 is located at the first position, the engaging body 134 is disposed between the limiting member 120 and the mounting member 110, so that the first limiting portion 122 is staggered from the sheave 400, that is, the sheave 400 can normally rotate in the forward and reverse directions; when the transmission member 130 is located at the second position, the matching body 134 is staggered with the limiting member 120, and under the action of the elastic restoring force, the limiting member 120 automatically resets and is located at a locked state, so that the first limiting portion 122 is in locking fit with the sheave 400, and the sheave 400 cannot rotate or rotate reversely.

Based on the above embodiments, as shown in fig. 2 and fig. 3, in an embodiment, the limiting mechanism 100 further includes a guiding element 140 fixed on the mounting element 110, and a first elastic pressing element 150 sleeved on the guiding element 140, the limiting element 120 is movably connected with the guiding element 140, one end of the first elastic pressing element 150 is fixedly connected with or abutted against the guiding element 140, and the other end of the first elastic pressing element 150 is fixedly connected with or abutted against the limiting element 120. In this way, the first elastic pressing member 150 is engaged with the guide member 140, so that the limiting member 120 can be elastically restored and can move along the length direction of the guide member 140, and the first limiting portion 122 can be accurately engaged with the sheave 400 in a stop manner.

Alternatively, the guide 140 is provided with a threaded rod (not shown) and the mounting member 110 is provided with an internally threaded bore (not shown) that threadedly engages the threaded rod. Thus, the height of the guide member 140 on the mounting member 110 is adjusted by rotating the guide member 140, so that the preload of the first elastic pressing member 150 is adjusted to adjust the preload of the limiting member 120.

In addition to any embodiment of the limiting mechanism 100, in an embodiment, two guiding elements 140 are included and are disposed on the mounting element 110 at intervals, the limiting element 120 is slidably connected to the two guiding elements 140, and the limiting element 120 can move along the length direction of the guiding elements 140. Thus, the installation reliability of the limiting member 120 is further improved, so that the movement of the limiting member 120 is more accurate, and the first limiting portion 122 can be accurately engaged with the sheave 400 in a stop manner.

The first elastic pressing member 150 is a compression spring, a pressing sheet, a rubber sleeve, or the like.

Similarly, in an embodiment, the limiting element 120 is rotatably disposed on the mounting element 110, and a second elastic pressing element (not shown) is disposed between the limiting element 120 and the mounting element 110. In this way, the first elastic pressing member 150 enables the limiting member 120 to elastically return and rotate in the predetermined direction, so that the first limiting portion 122 can be accurately engaged with the sheave 400.

The second elastic pressing piece is a tension spring, an elastic pull rope, an elastic clamping piece and the like.

On the basis of any of the above embodiments of elastic restoration of the limiting member 120, as shown in fig. 3 and fig. 4, in an embodiment, the matching body 134 can be inserted between the limiting member 120 and the mounting member 110, and the matching body 134 is a convex structure. Thus, the protrusion structure is utilized to separate the limiting member 120 from the mounting member 110 or increase the included angle, so as to change the position of the first limiting portion 122, thereby controlling the first limiting portion 122.

Optionally, in another embodiment, the limiting member 120 is magnetically coupled to the mounting member 110, the matching body 134 can be inserted between the limiting member 120 and the mounting member 110, and the matching body 134 is a protruding structure. Thus, the limiting member 120 can be automatically magnetically attracted to return to lock the first limiting portion 122 and the sheave 400, so that the sheave 400 cannot rotate or rotate reversely. Meanwhile, the protrusion structure is utilized to separate the limiting member 120 from the mounting member 110 or increase the included angle, so that the position of the first limiting portion 122 can be changed, and the first limiting portion 122 can be controlled.

Specifically, when the transmission member 130 is located at the first position, the engaging body 134 is disposed between the limiting member 120 and the mounting member 110, so that the first limiting portion 122 is staggered from the sheave 400, that is, the sheave 400 can normally rotate in the forward and reverse directions; when the transmission member 130 is located at the second position, the matching body 134 and the limiting member 120 are staggered, and under the action of the magnetic attraction force, the limiting member 120 automatically resets and is located at a locking state, so that the first limiting portion 122 is in locking fit with the sheave 400, and the sheave 400 cannot rotate or rotate reversely.

It should be noted that the specific implementation manner of "the first limiting portion 122 is in limiting fit with the second limiting portion 410, so that the sheave 400 is not rotatable or can not be reversed" may be various, for example, the first limiting portion 122 is a limiting column, the second limiting portion 410 is a limiting hole, and the sheave 400 is not rotatable by the fit of the limiting column and the limiting hole; or the first limiting part 122 is a limiting tooth, the second limiting part 410 is a limiting groove, and the ratchet 320 mechanism is formed by matching the limiting tooth and the limiting groove, so that the rope wheel 400 can not rotate reversely.

On the basis of any of the above embodiments, as shown in fig. 3, optionally, in an embodiment, the first limiting portion 122 is hook-shaped and disposed toward the mounting member 110; the limiting member 120 is provided with a pulling portion 124, and the pulling portion 124 is disposed on the opposite side of the first limiting portion 122. Thus, the hook-shaped first limiting portion 122 can be better engaged with the second limiting portion 410 in a rotation-stopping manner (alternatively, the second limiting portion 410 is a groove that is obliquely deepened). Meanwhile, the lifting portion 124 is provided to facilitate force application, so that the first limiting portion 122 is separated from the second limiting portion 410.

Specifically, after the overspeed governor action is accomplished, when needing the overspeed governor to reset, accessible manual or mode such as remote operation are carried and are drawn portion 124 for first spacing portion 122 separates with the spacing portion 410 of second, and then the overspeed governor resets again, makes rope clamping groove 500 opened, and rope sheave 400 can just reverse, is convenient for drive the car motion.

In addition to any of the above embodiments, as shown in fig. 4, in one embodiment, the engaging body 134 is provided with a guide portion 102 disposed toward the connecting portion 132. In this way, the guide portion 102 facilitates guiding the engaging body 134 to be disposed between the limiting member 120 and the mounting member 110, so that the first limiting portion 122 is staggered from the sheave 400, and the sheave 400 can normally rotate in the forward and reverse directions.

Further, in an embodiment, the guiding portion 102 is a rounded or inverted-tapered structure.

On the basis of any of the above embodiments, as shown in fig. 1, in an embodiment, the mounting unit 200 is provided with a first avoiding groove 210 for avoiding the transmission member 130, and a second avoiding groove 220 for avoiding the first limiting portion 122. In this way, the first avoiding groove 210 is used to avoid the transmission member 130, so that the transmission member 130 can move relative to the mounting unit 200; the second avoiding groove 220 is used for avoiding the first limiting portion 122, so that the first limiting portion 122 and the second limiting portion 410 can be matched conveniently.

In an embodiment, a lifting device is further provided, which includes the safety device.

The lifting device adopts the safety device, when the speed limiter is in a non-triggering state (namely a non-working state) and the clamping block 310 is in a non-working state, the rope clamping groove 500 is opened, and the transmission piece 130 is in a first position; at this time, the engaging body 134 engages with the limiting member 120, so that the first limiting portion 122 is staggered from the rope pulley 400, and the rope pulley 400 can rotate forward and backward to drive the car to move. When the speed limiter is triggered to drive the transmission element 130 to move from the first position to the second position due to over-speed of the car or other reasons, and the clamping block 310 is in a working state, the rope clamping groove 500 clamps the traction rope on the rope pulley 400; at this time, the engaging body 134 and the limiting member 120 are staggered, and the limiting member 120 is in a locked state, so that the first limiting portion 122 is in stop fit with the sheave 400. The limiting mechanism 100 can prevent the rope pulley 400 from rotating or reversing, further can offset the impact force transmitted to the steel wire rope, avoids abnormal resetting of the speed limiter, and is favorable for the reliability of speed-limiting operation of the lifting equipment. This jacking equipment has adopted this safety device, and the security is higher, is favorable to improving jacking equipment reliability of operation.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Further, when one element is considered as "transmission connection" another element, the two elements may be fixed in a detachable connection manner or in a non-detachable connection manner, as long as the force transmission can be realized, such as sleeving, clamping, integrally-formed fixing, welding and the like, which can be realized in the prior art, and is not burdensome.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to," "disposed on" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A stop gear, its characterized in that includes:

a mounting member;

the limiting piece is movably arranged on the mounting piece and provided with a first limiting part used for limiting the rotation or reverse rotation of the rope wheel; and

the transmission part is provided with a connecting part for being in transmission connection with the stopper and a matching body arranged at intervals with the connecting part;

when the transmission piece is located at the first position, the matching body is matched with the limiting piece, so that the first limiting part and the rope wheel are staggered; when the transmission member is in the second position, the matching body and the limiting member are staggered, the limiting member is in a locking state, and the first limiting part is in locking fit with the rope wheel.

2. The limiting mechanism according to claim 1 wherein said limiting member is resiliently resettable against said mounting member; when the limiting part is in a locking state, the limiting part is in a reset position.

3. The limiting mechanism according to claim 2, further comprising a guide member fixed to the mounting member, and a first elastic pressing member sleeved on the guide member, wherein the limiting member is movably connected to the guide member, one end of the first elastic pressing member is fixedly connected to or abutted against the guide member, and the other end of the first elastic pressing member is fixedly connected to or abutted against the limiting member.

4. The limiting mechanism according to claim 3, wherein the number of the guiding members is two, and the two guiding members are spaced apart from each other on the mounting member, the limiting members are slidably connected to the two guiding members, respectively, and the limiting members are movable along the length direction of the guiding members.

5. The spacing mechanism of claim 2, wherein said spacing member is rotatably disposed on said mounting member, and a second elastic pressing member is disposed between said spacing member and said mounting member.

6. The spacing mechanism of claim 1, wherein said first spacing portion is hook-shaped and disposed toward said mounting member; the limiting piece is provided with a lifting part, and the lifting part is arranged on the opposite side of the first limiting part.

7. The spacing mechanism of any of claims 1 to 6, wherein said cooperating body is insertable between said spacing member and said mounting member, said cooperating body being a raised structure.

8. The spacing mechanism of claim 1, wherein said spacing member is magnetically engaged with said mounting member, said engaging member is insertable between said spacing member and said mounting member, and said engaging member is a protrusion.

9. A safety device, comprising the limiting mechanism according to any one of claims 1 to 8, wherein the safety device further comprises a mounting unit, a rope wheel rotatably mounted on the mounting unit, and a limiter, the mounting member and the limiter being mounted in the mounting unit, the rope wheel being provided with a plurality of second limiting portions arranged at intervals along a circumferential direction thereof, the second limiting portions being in limiting engagement with the first limiting portions, the limiter comprising clamping blocks which are engaged with the rope wheel to form rope clamping grooves, the clamping blocks being movably mounted on the mounting unit, and the clamping blocks being in transmission connection with the connecting portions; when the clamping block is in a non-working state, the rope clamping groove is opened, and the transmission piece is in a first position; when the clamping block is in a working state, the rope clamping groove is clamped, and the transmission piece is in a second position.

10. A lifting device, characterized in that it comprises a safety device according to claim 9.