CN211393446U

CN211393446U - Tensioning device of elevator speed limiter and elevator

Info

Publication number: CN211393446U
Application number: CN201922162820.1U
Authority: CN
Inventors: 高赞亭; 高建立
Original assignee: Hangzhou Xo Lift Co Ltd
Current assignee: Hangzhou Xo Lift Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-09-01
Anticipated expiration: 2029-12-05

Abstract

The tensioning device of the elevator speed limiter comprises an outer frame and a counterweight unit positioned in the outer frame, and further comprises an elastic piece and a positioning rod, wherein one end of the positioning rod is connected with the top or the bottom of the counterweight unit, the other end of the positioning rod is connected with the outer frame, the positioning rod can stretch out and draw back, and the elastic piece is sleeved on the positioning rod; the counter weight unit includes the inside casing and all installs in the leading pulley and the balancing weight of inside casing, the leading pulley is connected with the rope of overspeed governor, the lateral part of inside casing is provided with one or more and leads the boots, the counter weight unit can follow the frame motion through leading the boots, this scheme is for prior art, the inside casing is injectd through leading the boots, make the inside casing along the vertical direction up-and-down reciprocating motion of frame, avoid the inside casing to produce the displacement on the horizontal direction, thereby can cause behind the displacement amplitude grow on the horizontal direction that overspeed governor's overspeed tensioner produced the technical problem that wire rope relaxed and take off the groove.

Description

Tensioning device of elevator speed limiter and elevator

Technical Field

The application relates to the field of elevators, in particular to a tensioning device of an elevator speed limiter and an elevator.

Background

With the continuous development of innovation, the number of elevators in China is steadily increased, and the number of high-speed elevators is increased more and more. Traditional overspeed governor overspeed device tensioner has two kinds: one type is a pendulum type, namely, the tension of a tension pulley is realized by tensioning a steel wire rope through a weight block of the pendulum type; the other type is a weight drop-down type, namely a cast piece which is integrally cast is directly fixed under the guide pulley.

However, these two overspeed governor tensioning devices are applied to a high-speed elevator, even if the elevator runs at a high speed, the elevator can generate irregular swaying in the horizontal direction and in the front and back directions due to gravity tensioning, meanwhile, the elevator can generate small amplitude vibration in the vertical direction during normal running, noise of the elevator or resonance with the elevator car can be caused under normal running conditions, and under the working condition of emergency braking of the elevator, the displacement amplitude in the horizontal direction generated by the tensioning device of the overspeed governor is sharply increased, so that the steel wire rope is easy to loosen and get out of the groove, the loosened steel wire rope is thrown out and hung on different parts of the elevator, the elevator stopping fault is caused, and the elevator car is even damaged, and the personal safety of passengers in the elevator car is further seriously damaged.

SUMMERY OF THE UTILITY MODEL

The application provides a tensioning device of elevator overspeed governor and have its elevator for can arouse behind the displacement amplitude grow in the horizontal direction that the tensioning device of overspeed governor produced among the solution prior art wire rope lax and the technical problem who takes off the groove.

The application provides a tensioning device of an elevator speed limiter, which comprises an outer frame and a counterweight unit positioned in the outer frame, wherein the tensioning device of the elevator speed limiter also comprises an elastic piece and a positioning rod, one end of the positioning rod is connected with the top or the bottom of the counterweight unit, the other end of the positioning rod is connected with the outer frame, the positioning rod can stretch and retract, the length of the positioning rod is adjusted according to the distance between the outer frame and the counterweight unit, and the elastic piece is sleeved on the positioning rod and is tightly pressed or stretched between the counterweight unit and the outer frame;

the counterweight unit comprises an inner frame, and a guide pulley and a counterweight block which are arranged on the inner frame, the guide pulley is connected with a rope of the speed limiter, one or more guide shoes are arranged on the side part of the inner frame, and the counterweight unit can move along the outer frame through the guide shoes.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the positioning rod comprises at least two rod bodies nested in each other.

Optionally, the number of the positioning rods is multiple, and the positioning rods are arranged between the inner frame and the outer frame at intervals.

Optionally, the outer frame includes:

the inner frame is arranged between the two guide rails, one or more guide shoes are arranged on two sides of the inner frame, and the inner frame can move along the two guide rails through the guide shoes;

two supporting parts are arranged side by side and connected between the two guide rails, one end of the positioning rod, back to the inner frame, is installed on the corresponding supporting part, one of the supporting parts at the tops of the two guide rails is an upper supporting part, and the other supporting part at the bottoms of the two guide rails is a lower supporting part.

Optionally, the upper supporting part is provided with two through holes arranged at intervals, and the rope passes through one of the through holes, bypasses the guide pulley and penetrates out of the other through hole.

Optionally, the inner frame includes two columns, and an upper cross beam and a lower cross beam connected between the two columns, the upper cross beam is provided with two channels arranged at intervals, the rope passes through one of the channels to pass around the guide pulley and penetrate out from the other channel, and the counterweight block is detachably mounted between the two columns and is supported by the lower cross beam.

Optionally, the inside casing still includes two fixed plates, two fixed plates are installed in two stands, just two fixed plates and two stands enclose and are equipped with the installation clearance, guide pulley arranges in the installation clearance and rotation install in between two fixed plates.

Optionally, the inner frame further comprises an anti-jump rod, the anti-jump rod is mounted on the corresponding upright column and matched with the guide pulley to prevent the rope from being separated from the guide pulley.

Optionally, the tensioning device of elevator overspeed governor still includes switch touch panel and two proximity switches, the switch touch panel install in the counter weight unit and with two proximity switches cooperate, two proximity switches install in the frame to can send shut down signal to the elevator respectively, two proximity switches respectively as for the upper and lower both sides of switch touch panel to the extreme condition of the lift of restriction counter weight unit.

The application also provides the following technical scheme:

an elevator comprising a tensioning device of an elevator governor as described above.

The application discloses overspeed device tensioner and elevator of elevator overspeed device governor has one of following technological effect at least:

the inner frame is limited by the guide shoes, so that the inner frame can reciprocate up and down along the vertical direction of the outer frame, and the inner frame is prevented from displacing in the horizontal direction, thereby solving the technical problems that a steel wire rope is loosened and the groove is removed after the displacement amplitude in the horizontal direction generated by a tensioning device of the speed limiter is increased.

Drawings

Fig. 1 is a schematic structural view of a tension device of an elevator governor of an embodiment provided in the present application;

fig. 2 is a schematic structural view of fig. 1 without the elastic member and the fixing plate.

The reference numerals in the figures are illustrated as follows:

100. a tension device of an elevator speed limiter; 101. a rope; 10. an outer frame; 11. a support portion; 12. a guide rail; 20. a counterweight unit; 21. an inner frame; 211. a column; 212. an upper cross beam; 213. a lower cross beam; 22. a guide pulley; 23. a balancing weight; 24. a fixing plate; 25. the anti-jumping bar; 26. a guide shoe; 30. an elastic member; 40. positioning a rod; 41. a rod body; 50. a switch touch panel; 51. a proximity switch.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that 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. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one embodiment, as shown in fig. 1 and 2, the present application provides an elevator comprising an elevator governor and a tensioning device 100 for the elevator governor for tensioning a rope 101 of the elevator governor.

In another embodiment, as shown in fig. 1-2, a tension device 100 of an elevator speed governor comprises an outer frame 10 and a counterweight unit 20 located inside the outer frame 10, the counterweight unit 20 comprises an inner frame 21 and a guide pulley 22 and a counterweight 23 both mounted on the inner frame 21, the guide pulley 22 is connected with a rope 101 of the speed governor.

It is understood that the outer frame 10 is substantially rectangular in shape after ignoring the thickness, the inner frame 21 is substantially rectangular in shape after ignoring the thickness, and the outer frame 10 and the inner frame 21 are in the same plane. After downwardly passing around the guide pulley 22, the rope 101 of the elevator speed limiter is upwardly folded back to the elevator speed limiter, the counterweight block 23 is installed in the inner frame 21, and under the normal working state of the elevator speed limiter, the total weight of the inner frame 21 and the counterweight block 23 plays a role in tensioning the lifting force of the rope 101.

Wherein the weight of the counterweight 23 can be adjusted according to different operating speeds of the elevator. Specifically, the counterweight block 23 includes a plurality of counterweight modules, which are detachably connected to the inner frame 21, and the number of the counterweight modules can be adjusted according to different operation speeds and stroke heights of the elevator, which is not further described herein.

In the present embodiment, the outer frame 10 may be fixed to the elevator shaft by expansion bolts. Of course, in other embodiments, the outer frame 10 may be fixed in the elevator shaft by welding or the like.

In another embodiment, as shown in fig. 1 to 2, the tension device 100 of the elevator governor further includes an elastic member 30 and a positioning rod 40, one end of the positioning rod 40 is connected to the top or bottom of the counterweight unit 20, the other end is connected to the outer frame 10, the positioning rod 40 is capable of extending and retracting and adjusting its length according to the distance between the outer frame 10 and the counterweight unit 20, and the elastic member 30 is sleeved on the positioning rod 40 and is pressed or stretched between the counterweight unit 20 and the outer frame 10.

It can be understood that, when the inner frame 21 is installed, the length of the positioning rod 40 is adjusted according to the distance between the inner frame 21 and the outer frame 10 while maintaining the compressed or stretched state of the elastic member 30. Under the working condition of emergency braking of the elevator, the elastic piece 30 absorbs impact energy in an energy absorption mode of compression and release, and can limit the emergency upward jump of the inner frame 21 in the vertical direction; meanwhile, under the normal working condition of the elevator, the vertical jumping of the inner frame 21 is also slowed down, so that the small vertical jumping of the guide pulley 22 in the running process of the elevator is overcome. The positioning rod 40 is arranged so that when the length of the elastic element 30 is too long, the positioning rod 40 has an effect of supporting the elastic element 30, and can be used for conveniently mounting the elastic element 30 on the inner frame 21 and the outer frame 10; meanwhile, when the inner frame 21 compresses the elastic members 30, the elastic members 30 are prevented from being bent, so that the elastic members 30 cannot slow down the vertical jump of the inner frame 21.

Specifically, under the working condition of emergency braking of the elevator, because the emergency braking of the elevator car can generate upward pulling and throwing force on the tensioning device 100 of the elevator speed limiter, the rope 101 drives the guide pulley 22 to throw upward at the same time, the elastic piece 30 generates rebound force to run reversely after being compressed or stretched, the upward throwing energy is consumed by the back-and-forth running until the elevator stops, so that the damage of the energy instantaneous impact in the emergency upward throwing process to the whole structure of the tensioning device 100 of the elevator speed limiter is reduced, and the indirect damage to other elevator components, the injury of personnel or the damage of elevator equipment caused by the damage of the tensioning device 100 of the elevator speed limiter are reduced.

Wherein, one end of the positioning rod 40 is connected with the bottom of the inner frame 21 of the counterweight unit 20, and when the other end is connected with the outer frame 10, the elastic member 30 is stretched between the inner frame 21 and the outer frame 10, and the two ends of the elastic member 30 are respectively fixed on the inner frame 21 and the outer frame 10 by welding or bolts; when one end of the positioning rod 40 is connected to the top of the inner frame 21 of the counterweight unit 20 and the other end is connected to the outer frame 10, the elastic member 30 is compressed between the inner frame 21 and the outer frame 10, and both ends of the elastic member 30 may be fixed to the inner frame 21 and the outer frame 10 by welding or bolts, respectively, as required.

In the present embodiment, the elastic member 30 is a spring. Of course, in other embodiments, the elastic member 30 may be an elastic element such as a rubber member, as long as the elastic element can absorb the impact energy of the inner frame 21 in a compression and release energy absorption manner.

Preferably, the number of the positioning rods 40 is plural, and the plurality of positioning rods 40 are arranged between the inner frame 21 and the outer frame 10 at intervals. The plurality of positioning rods 40 can increase the stress point between the inner frame 21 and the outer frame 10 to disperse the acting force of the inner frame 21 on the outer frame 10. At the same time, the plurality of positioning bars 40 can increase the stability of the tensioning device 100 of the elevator governor. The two ends of the positioning rod 40 are respectively fixed on the inner frame 21 and the outer frame 10 through welding or bolts.

In another embodiment, as shown in FIG. 2, the positioning rod 40 includes at least two rod bodies 41 nested within each other.

It is understood that the number of the rod bodies 41 is two, and the two rod bodies 41 are nested with each other to change the length of the positioning rod 40 itself so that the positioning rod 40 is adapted to the distance between the outer frame 10 and the inner frame 21.

Specifically, the number of the rod bodies 41 is two, and the rod bodies are respectively a first rod body and a second rod body, one end of the first rod body is connected with the inner frame 21, an inner hole arranged along the axial direction is formed in the end face of the other end, one end of the second rod body is connected with the outer frame 10, and the other end can be inserted into the inner hole and slide along the inner hole. When the positioning rod 40 stretches, the second rod body slides along the inner hole of the first rod body, so that the length of the stretching positioning rod 40 can be changed.

In another embodiment, as shown in fig. 1 and 2, one or more guide shoes 26 are provided at the sides of the inner frame 21, and the counterweight unit 20 can move along the outer frame 10 through the guide shoes 26.

It can be understood that when the elevator runs at a high speed of 3.0m/s or more, the rope 101 may shake in the horizontal direction and move up and down in the vertical direction with a certain amplitude in the process of running at a high speed along with the speed limiter, and may also resonate to a certain extent due to the pulling interaction with the pulling shaft transmitted from the car. The inner frame 21 limits the inner frame 21 to reciprocate up and down along the vertical direction of the outer frame 10 through the guide shoes 26, and displacement of the inner frame 21 in the horizontal direction is avoided. Meanwhile, the situation that the displacement amplitude generated by the counterweight unit 20 is sharply increased under the working condition of emergency braking of the elevator can be avoided, so that the rope 101 is easily separated from the sliding roller, the separated rope 101 can be thrown out and hung on different parts of the elevator, the elevator stopping fault is caused, even the elevator car is damaged, and the personal safety of passengers in the elevator car is further seriously damaged.

Wherein the guide shoe 26 is fixed to the inner frame 21 by welding or bolts. When the guide shoes 26 are provided in plural, the plural guide shoes 26 are fixed to the inner frame 21 at uniform or non-uniform intervals in the vertical direction of the inner frame 21.

In another embodiment, as shown in fig. 1 and 2, the outer frame 10 includes: the guide rail structure comprises two guide rails 12, an inner frame 21 is arranged between the two guide rails 12, one or more guide shoes 26 are arranged on two sides of the inner frame 21, and the inner frame 21 can move along the two guide rails 12 through the guide shoes 26; the two support parts 11 are arranged side by side and connected between the two guide rails 12, one end of the positioning rod 40, which faces away from the inner frame 21, is installed on the corresponding support part 11, one of the support parts 11 installed at the tops of the two guide rails 12 is an upper support part 11, and the other support part 11 installed at the bottoms of the two guide rails 12 is a lower support part 11.

It will be understood that guide shoes 26 are provided on both sides of the outer frame 10, and the inner frame 21 is slidably coupled to the guide rails 12 through the guide shoes 26 so as to move along the outer frame 10. The arrangement of the two guide rails 12 can make the inner frame 21 uniformly distributed on the two guide rails 12 under the pulling force of the rope 101, so as to avoid the inner frame 21 and the guide rails 12 from being mutually clamped, and make the inner frame 21 slide more smoothly along the guide rails 12.

Preferably, the upper support 11 is provided with two through holes arranged at intervals, and the rope 101 passes through one of the through holes, passes around the guide pulley 22, and passes through the other through hole.

It will be appreciated that the distance of the two through holes in the horizontal direction is the diameter of the guide pulley 22. When the inner frame 21 is placed in the outer frame 10, the through holes are formed to prevent the rope 101 from passing around the upper support 11 and then being connected to the guide pulleys 22, thereby preventing the rope 101 from increasing the friction between the rope 101 and the upper cross beam 212 during movement.

In another embodiment, as shown in fig. 1 and 2, inner frame 21 includes two columns 211, and an upper cross member 212 and a lower cross member 213 connected between the two columns 211.

It is understood that the two columns 211 are fixed to the upper cross member 212 and the lower cross member 213 by bolts or welding. One end of the positioning rod 40 facing away from the outer frame 10 can be connected to the upper cross member 212 or the lower cross member 213, and the guide shoe 26 is disposed on the vertical column 211. The upper cross member 212 is disposed parallel to the support portion 11.

Preferably, the upper cross beam 212 is provided with two channels arranged at intervals, and the rope 101 passes through one channel, passes around the guide pulley 22, and passes out of the other channel.

It will be appreciated that the distance of the two channels in the horizontal direction is the diameter of the guide pulley 22. When the guide pulley 22 is arranged in the inner frame 21, the channel can prevent the rope 101 from passing through the upper cross beam 212 and then being connected with the guide pulley 22, and the friction force between the rope 101 and the upper cross beam 212 is prevented from increasing when the rope 101 moves.

Preferably, the counterweight 23 is detachably installed between the two vertical columns 211, and the counterweight 23 is supported by the lower beam 213.

It can be understood that the two sides of the counterweight module are provided with the fixture blocks, the two upright posts 211 are provided with the strip-shaped clamping grooves matched with the fixture blocks, and the counterweight block 23 can be fixed on the inner frame 21 through the clamping of the fixture blocks in the strip-shaped clamping grooves, so that the counterweight block 23 and the inner frame 21 can be conveniently detached. Of course, the counterweight module of the counterweight 23 can also be fixed on the two upright posts 211 by bolts, and the counterweight 23 can be conveniently dismounted on the inner frame 21 by the bolts.

Further, the inner frame 21 further includes two fixing plates 24, the two fixing plates 24 are mounted on the two vertical posts 211, a mounting gap is defined by the two fixing plates 24 and the two vertical posts 211, and the guide pulley 22 is disposed in the mounting gap and rotatably mounted between the two fixing plates 24.

It will be appreciated that both of the fixing plates 24 are fixed to the two uprights 211 by means of bolts or welding. Both sides of guide pulley 22 all are provided with the pivot, and two fixed plates 24 all offer with pivot complex rotation groove, guide pulley 22 rotates through the cooperation of pivot with the rotation groove and installs between two fixed plates 24, the plane that the axial perpendicular to inside casing 21 of pivot formed.

Further, the inner frame 21 further includes anti-jump bars 25, and the anti-jump bars 25 are installed at the corresponding columns 211 to be engaged with the guide pulleys 22 to prevent the ropes 101 from being disengaged from the guide pulleys 22.

It will be appreciated that the guide pulley 22 is provided with rope grooves for cooperation with the rope 101. The anti-jump rod 25 is fixed on the horizontal radial direction of the guide pulley 22, a certain gap is reserved at a position away from the meshing position between the rope 101 and the guide pulley 22, when the rope 101 passes around the guide pulley 22, only a small amount of small gap exists between the rope 101 and the anti-jump rod 25, the gap is smaller than the thickness of the rope 101, the gap facilitates the rotating motion of the guide pulley 22, and meanwhile, the rope 101 can be prevented from jumping out of a rope groove of the guide pulley 22 in an accidental situation.

In another embodiment, as shown in fig. 1 and 2, the tensioning device 100 of the elevator speed limiter further includes a switch touch plate 50 and two proximity switches 51, the switch touch plate 50 is installed on the counterweight unit 20 and is matched with the two proximity switches 51, the two proximity switches 51 are installed on the outer frame 10 and can respectively send stop signals to the elevator, and the two proximity switches 51 are respectively arranged on the upper side and the lower side of the switch touch plate 50 to limit the limit state of the lifting of the counterweight unit 20.

It is understood that two proximity switches 51 are fixed to the housing 10, a first proximity switch is located above the switch touch plate 50, and a second proximity switch is located below the switch touch plate 50. After the switch touch plate 50 on the counterweight unit 20 displaces, the approach switch 51 can be triggered to act, and the on-off signal of the switch is transmitted to the control system, so that the control system sends an instruction to stop the elevator. The proximity switch 51 can detect the state of two signals, i.e., abnormal extension of the wire rope and emergency ascending.

The control circuit is cut off before the approach switch 51 is mechanically operated (i.e. before the elastic member 30 is compressed), so that the elevator safety in emergency is ensured, the operation time of the approach switch 51 is relatively fast, which is about less than 300 milliseconds, and the approach switch 51 can be operated before the mechanical operation, and the electrical operation of the approach switch 51 is the first protection.

Specifically, under the working condition of emergency braking of the elevator, after the rope 101 suddenly jumps upwards, the rope 101 drives the counterweight unit 20 to vertically move upwards, the switch touch plate 50 can compress the first proximity switch upwards until the first proximity switch sends a stop signal, the stop signal is transmitted to the control system, and the control system sends an instruction to stop the elevator; after the rope 101 is abnormally extended, the counterweight unit 20 vertically moves downwards, the switch touch plate 50 downwards compresses the second proximity switch until the second proximity switch sends a stop signal, the stop signal is transmitted to the control system, and the control system sends an instruction to stop the elevator to remind a maintenance worker to maintain the elevator in time.

Preferably, both ends of the switch contact plate 50 are bent, so that both ends of the switch contact plate 50 have bent sections. The switch touch panel 50 touches the proximity switch 51 through the bent section, so that the contact surface between the switch touch panel 50 and the proximity switch 51 is larger, and the proximity switch 51 can be protected.

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. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

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

Claims

1. The tensioning device of the elevator speed limiter comprises an outer frame and a counterweight unit positioned in the outer frame, and is characterized by further comprising an elastic piece and a positioning rod, wherein one end of the positioning rod is connected with the top or the bottom of the counterweight unit, the other end of the positioning rod is connected with the outer frame, the positioning rod can stretch and retract and adjust the length of the positioning rod according to the distance between the outer frame and the counterweight unit, and the elastic piece is sleeved on the positioning rod and tightly pressed or stretched between the counterweight unit and the outer frame;

2. The tension device of an elevator governor of claim 1, wherein the detent lever comprises at least two nested lever bodies.

3. The tension device of the elevator speed limiter according to claim 1 or 2, wherein the number of the positioning rods is plural, and the plural positioning rods are arranged between the inner frame and the outer frame at intervals.

4. The tension device in an elevator governor of claim 1, wherein the housing comprises:

5. The tension device of an elevator governor according to claim 4, wherein the upper support portion defines two spaced apart through holes, and the rope passes through one of the through holes, around the guide pulley, and out through the other through hole.

6. The tensioning device of the elevator speed limiter according to claim 1, wherein the inner frame comprises two columns, an upper cross beam and a lower cross beam which are connected between the two columns, the upper cross beam is provided with two channels which are arranged at intervals, the rope passes through one channel, bypasses the guide pulley and penetrates out of the other channel, and the counterweight block is detachably mounted between the two columns and is supported by the lower cross beam.

7. The tensioning device for the elevator governor according to claim 6, wherein the inner frame further comprises two fixing plates mounted to two posts, and the two fixing plates and the two posts enclose a mounting gap, and the guide pulley is disposed in the mounting gap and rotatably mounted between the two fixing plates.

8. The tension device for an elevator governor of claim 6, wherein the inner frame further comprises anti-jump bars mounted to respective posts that cooperate with the guide pulleys to prevent the rope from disengaging from the guide pulleys.

9. The tensioning device of the elevator speed limiter according to claim 1, further comprising a switch touch panel and two proximity switches, wherein the switch touch panel is installed on the counterweight unit and is matched with the two proximity switches, the two proximity switches are installed on the outer frame and can respectively send stop signals to the elevator, and the two proximity switches are respectively arranged on the upper side and the lower side of the switch touch panel so as to limit the limit state of the lifting of the counterweight unit.

10. Elevator, characterized in that it comprises a tensioning device of an elevator speed limiter according to any of claims 1-9.