One-way speed limiter

Abstract

The utility model discloses a one-way speed limiter which comprises a mounting plate, a guide wheel is rotatably connected to the interior of the mounting plate, an electric switch is fixedly connected to the outer end of the mounting plate, and a speed reduction assembly is arranged at the outer end of the electric switch. According to the one-way speed limiter, in the falling process of an elevator, an electric appliance switch is automatically powered off, a hydraulic air cylinder loses power, at the moment, an ejector rod drives a clamping plate connected with a clamping plate to conduct clamping from the two sides of a guide wheel, friction plates on the inner side of the clamping plate make contact with friction rings at the outer end of the guide wheel, and friction force between the guide wheel and the clamping plate is increased; the impact force generated when the pawl and the limiting gear are clamped is reduced, passengers are prevented from impacting the elevator car, meanwhile, the force in the clamping process of the pawl and the limiting gear is reduced, and therefore abrasion of the pawl and the limiting gear is reduced, and the pawl or the limiting gear is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way speed limiters, in particular to a one-way speed limiter. Background Art

[0002] The elevator's one-way speed limiter is one of the elevator's safety protection devices. Its main function is to ensure that the elevator will not fall at an excessively fast speed in an unexpected situation, thereby ensuring personal safety. In the elevator industry, the use of elevator one-way speed limiters has become a necessary equipment. Through its application, the safety performance of people riding elevators can be greatly improved. At the same time, the working principle of the elevator's one-way speed limiter also reflects its self-protection characteristics, that is, it can slow down the elevator speed in time to avoid personal injury.

[0003] When the speed of the guide wheel exceeds 115% of its own speed during the rapid fall of the elevator, the electrical switch is powered off, and at the same time, the pawls on the inner side of the guide wheel are engaged with the limit gears on the inner wall of the mounting plate, thereby preventing the elevator from continuing to fall. However, at the moment when the pawls are engaged with the limit gears, the elevator car will generate a large impact force, which will not only cause a large impact on the passengers inside the elevator car, but also cause the passengers to collide with the elevator car. At the same time, the large impact will also increase the wear of the pawls and the limit gears, and even cause damage or deformation of the gears, increasing maintenance costs.

[0004] To this end, the utility model provides a one-way speed limiter, which generates a large friction force by contacting the speed reduction plate inside the clamping plate with the friction ring at the outer end of the guide wheel to solve the above problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a one-way speed limiter to solve the above problems.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a one-way speed limiter, including a mounting plate, the interior of the mounting plate is rotatably connected to a guide wheel, the outer end of the mounting plate is fixedly connected to an electrical switch, the outer end of the electrical switch is provided with a deceleration assembly, the deceleration assembly includes a hydraulic cylinder symmetrically fixedly connected to the outer end of the mounting plate, the interior of the hydraulic cylinder is movably connected to a push rod, the push rod passes through the mounting plate and is movably connected thereto, the outer end of the push rod is fixedly connected to a fixing plate, the outer end of the fixing plate is fixedly connected to a splint, the inner wall of the splint is fixedly connected to a deceleration plate, and the splint is provided at the outer end of the guide wheel.

[0007] Preferably, a limiting gear is fixedly connected to the inner wall of one side of the mounting plate, a pawl is movably connected to the inner side of the guide wheel, friction rings are fixedly connected to both sides of the guide wheel, and protrusions are provided on the outer ends of the speed reducer and the friction ring.

[0008] Preferably, the deceleration assembly further comprises a controller fixedly connected to the outer end of the electrical switch, and a control line is fixedly connected between the controller and the hydraulic cylinder.

[0009] Preferably, a support rod is fixedly connected inside the mounting plate, three support rods are provided and arranged in a triangle, and the support rods are slidably connected to the two groups of clamping plates.

[0010] Preferably, the outer end of the clamping plate is fixedly connected to a connecting plate, the outer end of the connecting plate is rotatably connected to a side rod, and a connecting piece is rotatably connected between the two groups of side rods.

[0011] Preferably, a bracket is fixedly connected between the two groups of the connecting pieces, the bracket is Y-shaped, and a clamping wheel is rotatably connected inside the bracket, and the clamping wheel is arranged at the outer end of the guide wheel.

[0012] Beneficial Effects

[0013] The utility model provides a one-way speed limiter. Compared with the prior art, it has the following beneficial effects:

[0014] 1. The one-way speed limiter, when the elevator falls, the electrical switch is automatically powered off, causing the hydraulic cylinder to lose power. At this time, the push rod drives the clamping plates connected to the clamping plates to clamp from both sides of the guide wheel. At this time, the friction plate on the inner side of the clamping plate contacts the friction ring on the outer end of the guide wheel. By increasing the friction between the guide wheel and the clamping plate, the impact force generated when the ratchet pawl and the limit gear are engaged is reduced, preventing passengers from hitting the elevator car. At the same time, the force during the engagement process of the ratchet pawl and the limit gear is reduced, thereby reducing the wear of the ratchet pawl and the limit gear, and preventing the ratchet pawl or the limit gear from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the connection structure between the fixing plate and the clamping plate of the utility model;

[0017] Figure 3 It is a schematic diagram of the connection structure between the clamping plate and the speed reducer of the utility model;

[0018] Figure 4 It is a schematic diagram of the connection structure between the guide wheel and the friction ring of the utility model.

[0019] In the figure, 1, mounting plate; 2, guide wheel; 3, electrical switch; 4, reduction assembly; 401, controller; 402, hydraulic cylinder; 403, control line; 404, push rod; 405, fixing plate; 406, clamping plate; 407, reduction plate; 5, friction ring; 6, support rod; 7, connecting plate; 8, side rod; 9, connecting plate; 10, bracket; 11, clamping wheel. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] See also Figure 1-3 A one-way speed limiter comprises a mounting plate 1, wherein the mounting plate 1 is rotatably connected to a guide wheel 2 inside, an electrical switch 3 is fixedly connected to the outer end of the mounting plate 1, a reduction assembly 4 is arranged at the outer end of the electrical switch 3, the reduction assembly 4 comprises a hydraulic cylinder 402 symmetrically fixedly connected to the outer end of the mounting plate 1, a push rod 404 is movably connected to the inside of the hydraulic cylinder 402, the push rod 404 penetrates the mounting plate 1 and is movably connected thereto, a fixing plate 405 is fixedly connected to the outer end of the fixing plate 405, a clamping plate 406 is fixedly connected to the outer end of the clamping plate 406, a reduction plate 407 is fixedly connected to the inner wall of the clamping plate 406, and the clamping plate 406 is arranged at the outer end of the guide wheel 2. The purpose of this arrangement is that when the speed of the guide wheel 2 exceeds 115% of its own speed during the falling process of the elevator, the pawl of the guide wheel 2 is quickly engaged with the limit gear on the inner wall of the mounting plate 1. At this time, the hydraulic cylinder 402 drives the fixing plate 405 connected to the push rod 404 to move toward the inner side of the mounting plate 1, so that the deceleration plate 407 inside the clamping plate 406 contacts the friction ring 5 at the outer end of the guide wheel 2. By increasing the friction between the clamping plate 406 and the guide wheel 2, the guide wheel 2 is decelerated, thereby reducing the impact force generated when the pawl is engaged with the limit gear, preventing the vibration of the elevator car, causing the passengers to collide with the inside of the elevator car, affecting the safety of the passengers, and at the same time decelerating the guide wheel 2, reducing the impact force generated when the pawl is engaged with the limit gear, thereby reducing the wear degree of the pawl and the limit gear, and preventing the pawl and the limit gear from being damaged. The clamped guide wheel 2 and the clamping plate 406 can also prevent the guide wheel 2 from rotating, so that the elevator car is limited in the falling position, which is convenient for construction personnel to rescue in time.

[0023] Preferably, a limit gear is fixedly connected to the inner wall of one side of the mounting plate 1, a ratchet is movably connected to the inner side of the guide wheel 2, friction rings 5 ​​are fixedly connected to both sides of the guide wheel 2, and protrusions are provided at the outer ends of the speed reducer 407 and the friction ring 5. The purpose of this arrangement is that the speed reducer 407 and the friction ring 5 enhance the stability of the clamping of the clamping plate 406 on the guide wheel 2, and the speed reducer 407 and the friction ring 5 are easy to replace.

[0024] Preferably, the deceleration assembly 4 further comprises a controller 401 fixedly connected to the outer end of the electrical switch 3, and a control line 403 is fixedly connected between the controller 401 and the hydraulic cylinder 402. The purpose of this arrangement is that during the normal operation of the elevator, the push rod 404 inside the hydraulic cylinder 402 is in a retracted state, at which time the deceleration plate 407 inside the clamping plate 406 does not contact the friction ring 5 at the outer end of the guide wheel 2. When the electrical switch 3 is powered off, the push rod 404 pops out quickly, so that the deceleration plate 407 on the inner wall of the clamping plate 406 is engaged with the friction ring 5 at the outer end of the guide wheel 2.

[0025] Preferably, the mounting plate 1 is fixedly connected with a support rod 6, which is provided with three support rods 6 arranged in a triangular shape, and the support rods 6 are slidably connected with the two groups of clamping plates 406. The purpose of this arrangement is that the support rods 6 are provided to enhance the stability of the clamping plates 406 during sliding.

[0026] Embodiment 2:

[0027] See also Figure 1-4 This embodiment provides a one-way speed limiter technical solution based on the first embodiment: the outer end of the clamping plate 406 is fixedly connected with the connecting plate 7, the outer end of the connecting plate 7 is rotatably connected with the side rod 8, the two sets of side rods 8 are rotatably connected with the connecting piece 9, the two sets of connecting pieces 9 are fixedly connected with the bracket 10, the bracket 10 is Y-shaped, the inside of the bracket 10 is rotatably connected with the clamping wheel 11, and the clamping wheel 11 is arranged at the outer end of the guide wheel 2. The purpose of this arrangement is that during the movement of the two sets of clamping plates 406, the bracket 10 inside the two sets of connecting pieces 9 will only move up and down, and the clamping wheel 11 inside the bracket 10 has a limiting effect on the steel wire rope inside the guide wheel 2, preventing the shock generated when the ratchet pawl is engaged with the limiting gear, causing the steel wire rope to fall off from the inside of the guide wheel 2, and enhancing the safety of the elevator during emergency stop.

[0028] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A one-way speed limiter, comprising a mounting plate (1), characterized in that: The interior of the mounting plate (1) is rotatably connected to a guide wheel (2); the outer end of the mounting plate (1) is fixedly connected to an electrical switch (3); the outer end of the electrical switch (3) is provided with a deceleration assembly (4); the deceleration assembly (4) comprises a hydraulic cylinder (402) symmetrically fixedly connected to the outer end of the mounting plate (1); the interior of the hydraulic cylinder (402) is movably connected to a push rod (404); the push rod (404) passes through the mounting plate (1) and is movably connected thereto; the outer end of the push rod (404) is fixedly connected to a fixing plate (405); the outer end of the fixing plate (405) is fixedly connected to a clamping plate (406); the inner wall of the clamping plate (406) is fixedly connected to a deceleration plate (407); the clamping plate (406) is provided at the outer end of the guide wheel (2).

2. A one-way speed limiter according to claim 1, characterized in that: A limit gear is fixedly connected to the inner wall of one side of the mounting plate (1), a ratchet is movably connected to the inner side of the guide wheel (2), friction rings (5) are fixedly connected to both sides of the guide wheel (2), and protrusions are provided on the outer ends of the speed reducer (407) and the friction ring (5).

3. A one-way speed limiter according to claim 1, characterized in that: The deceleration assembly (4) further comprises a controller (401) fixedly connected to the outer end of the electrical switch (3), and a control line (403) is fixedly connected between the controller (401) and the hydraulic cylinder (402).

4. A one-way speed limiter according to claim 1, characterized in that: The interior of the mounting plate (1) is fixedly connected with a support rod (6), three of the support rods (6) are provided and arranged in a triangle, and the support rods (6) are slidably connected to the two groups of clamping plates (406).

5. A one-way speed limiter according to claim 1, characterized in that: The outer end of the clamping plate (406) is fixedly connected to a connecting plate (7), the outer end of the connecting plate (7) is rotatably connected to a side rod (8), and a connecting piece (9) is rotatably connected between two groups of the side rods (8).

6. A one-way speed limiter according to claim 5, characterized in that: A bracket (10) is fixedly connected between the two groups of the connecting pieces (9), the bracket (10) is Y-shaped, and a clamping wheel (11) is rotatably connected inside the bracket (10), and the clamping wheel (11) is arranged at the outer end of the guide wheel (2).

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