A reset type elevator speed limiter

Abstract

The present invention relates to the technical field of elevator speed limiters, and in particular to a reset elevator speed limiter, which solves the shortcomings of the prior art and comprises a base, a transmission assembly and a rope wheel rotatably mounted on the base, a ratchet is arranged on one side of the rope wheel, a connecting arm is movably hinged on the ratchet through a pin shaft, a rope pressing block is fixed to the end of the connecting arm through a screw, and a slider is slidably arranged on one side of the connecting arm, a sliding plate is movably hinged on one side of the slider, a bracket is welded on the top of the base, and through the arrangement of structures such as a servo motor, a rotating rod, a first spring, and a second spring, when a person starts a switch during resetting, a servo motor on one side can drive a cam to rotate, and the rotating rod can open a stop hook on one side by squeezing the cam, and at the same time, the ratchet can drive the rope pressing block to automatically reset under the pulling force of the first spring, and the two steps can be performed simultaneously, which is convenient for personnel to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator speed governors, and in particular to a resettable elevator speed governor. Background Art

[0002] The elevator speed limiter is one of the safety control components in the elevator safety protection system. When the elevator car is overspeeding or even in danger of falling for any reason during operation, and all other safety protection devices do not work, the speed limiter and safety clamp will work together to stop the elevator car.

[0003] When resetting the elevator speed limiter in the prior art, a person needs to first operate the ratchet to unlock it, and then reset the rope pressing block. The ratchet and the rope pressing block cannot be operated at the same time, which is inconvenient for personnel to use and inefficient. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a reset elevator speed limiter.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A reset elevator speed limiter, comprising a base, a transmission assembly and a rope wheel rotatably mounted on the base, a ratchet wheel is mounted on one side of the rope wheel, a connecting arm is movably hinged on the ratchet wheel through a pin shaft, a rope pressing block is fixed to the end of the connecting arm through a screw, and a slider is slidably arranged on one side of the connecting arm, a sliding plate is movably hinged on one side of the slider, a bracket is welded on the top of the base, a sliding rod is slidably arranged inside the bracket, one end of the sliding rod is fixedly connected to the sliding plate, and a limiting plate is welded on the other end of the sliding rod, and a first spring is sleeved on the outside of the sliding rod;

[0007] A rotating rod is movably hinged on the base, one end of which is fixed with a stop hook matching the ratchet by a screw, and a bending portion is fixedly provided on the rotating rod, an inner groove is opened inside the base, a servo motor is fixedly installed on the inner wall of the inner groove by bolts, the output end of the servo motor is connected to a driving shaft through a coupling, the driving shaft is connected to a driven shaft through a transmission assembly, a cam is sleeved on the outside of the driven shaft, a plurality of balls are mounted on the outer circumference of the cam, and the balls are driven by the cam to contact closely with one side of the bending portion in turn.

[0008] Preferably, a sliding groove is provided on one side of the connecting arm, and the sliding block is slidably connected to the sliding groove.

[0009] Preferably, the rotating rod and the bending portion are an integrally formed structure.

[0010] Preferably, one side of the rotating rod is fixedly connected to a second spring via a buckle, and the other end of the first spring is fixedly connected to the base.

[0011] Preferably, a guide hole is provided on the bracket, and the sliding rod is slidably connected to the sliding hole.

[0012] Preferably, two ends of the first spring are fixedly connected to the bracket and the limiting plate respectively.

[0013] Preferably, the transmission assembly includes a driving wheel, a driven wheel and a synchronous belt, the driving wheel and the driven wheel are respectively sleeved on the outside of the driving shaft and the driven shaft, and the synchronous belt is sleeved on the outside of the driving wheel and the driven wheel.

[0014] The beneficial effects of the present invention are:

[0015] 1. In the present invention, by setting the servo motor, the rotating rod, the first spring, the second spring and other structures, when the personnel starts the switch during resetting, the servo motor on one side can drive the cam to rotate, and the rotating rod can open the stop hook on one side by the squeezing of the cam. At the same time, under the pulling force of the first spring, the ratchet can drive the rope pressing block to automatically reset. The two steps can be performed simultaneously, which is convenient for personnel to operate.

[0016] 2. In the present invention, by setting the cam, after pressing the reset switch, the servo motor only needs to move once to complete the reset action, and the reset is rapid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of a reset elevator speed limiter proposed by the present invention;

[0018] Figure 2 This is an enlarged view of the reset elevator speed limiter provided by the present invention at the position marked A;

[0019] Figure 3 A top view of the cam proposed by the present invention.

[0020] In the figure: 1 base, 2 rope pulley, 3 ratchet, 4 bracket, 5 sliding plate, 6 first spring, 7 limit plate, 71 slide groove, 8 rotating rod, 9 transmission assembly, 10 servo motor, 11 bending part, 12 cam, 13 driven shaft, 14 ball, 15 inner groove, 16 second spring, 17 connecting arm, 18 stop hook, 19 slider. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-3A reset elevator speed limiter comprises a base 1, a transmission assembly 9 and a rope wheel 2 rotatably mounted on the base 1, a ratchet 3 is mounted on one side of the rope wheel 2, a connecting arm 17 is movably hinged on the ratchet 3 through a pin, a rope pressing block is fixed to the end of the connecting arm 17 by a screw, and a slider 19 is slidably arranged on one side of the connecting arm 17, a sliding plate 5 is movably hinged on one side of the slider 19, a bracket 4 is welded on the top of the base 1, a sliding rod is slidably arranged inside the bracket 4, one end of the sliding rod is fixedly connected to the sliding plate 5, and a limiting plate 7 is welded on the other end of the sliding rod, and a first spring 6 is sleeved on the outside of the sliding rod; the base 1 is movably hinged with a rotating rod 8, one end of the rotating rod 8 is fixed with a stop hook 18 matching the ratchet 3 by screws, and a bent portion 11 is fixedly provided on the rotating rod 8, an inner groove 15 is provided inside the base 1, a servo motor 10 is fixedly installed on the inner wall of the inner groove 15 by bolts, the output end of the servo motor 10 is connected with a driving shaft through a coupling, the driving shaft is connected with a driven shaft 13 through a transmission assembly 9, a cam 12 is sleeved on the outside of the driven shaft 13, a plurality of balls 14 are installed on the outer circumference of the cam 12, and the balls 14 are driven by the cam 12 to contact closely with one side of the bent portion 11 in sequence.

[0023] Among them, through the setting of structures such as the servo motor 10, the rotating rod 8, the first spring 6, the second spring 16, etc., when the person starts the switch during resetting, the servo motor 10 on one side can drive the cam 12 to rotate, and the rotating rod 8 uses the squeezing of the cam 12 to open the stop hook 18 on one side. At the same time, under the pulling force of the first spring 6, the ratchet 3 can drive the rope pressing block to automatically reset. The two steps can be performed simultaneously, which is convenient for personnel operation. Through the setting of the cam 12, after pressing the reset switch, the servo motor 10 only needs to move once to complete the reset action, and the reset is rapid.

[0024] A slide groove 71 is provided on one side of the connecting arm 17, and the slider 19 is slidably connected to the slide groove 71. The rotating rod 8 and the bending portion 11 are integrally formed structures. A second spring 16 is fixedly connected to one side of the rotating rod 8 by a buckle, and the other end of the first spring 6 is fixedly connected to the base 1. A guide hole is provided on the bracket 4, and the slide rod is slidably connected to the slide hole. The two ends of the first spring 6 are respectively fixedly connected to the bracket 4 and the limit plate 7. The transmission assembly 9 includes a driving wheel, a driven wheel and a synchronous belt. The driving wheel and the driven wheel are respectively sleeved on the outside of the driving shaft and the driven shaft 13, and the synchronous belt is sleeved on the outside of the driving wheel and the driven wheel.

[0025] In this embodiment, when the speed limiter is in overspeed action, the rope wheel 2 drives the pendulum to perform centrifugal motion, and causes the ratchet wheel 3 on one side to rotate. During the rotation of the ratchet wheel 3, the connecting arm 17 and the rope pressing block are driven to rotate simultaneously. The rope pressing block can press the traction rope to prevent the elevator from falling. At the same time, the connecting arm 17 also drives the slider 19, the sliding plate 5 and the sliding rod to slide. After the sliding rod slides, the first spring 6 on one side of the sliding rod is compressed;

[0026] Furthermore, when resetting, the personnel presses the reset button. At this time, the cam 12 on one side is at a certain distance from the curved portion 11. After rotating 45°, the ball 14 on the outer side of the cam 12 can press the curved portion 11, so that the rotating rod 8 drives the stop hook 18 to disengage from one side of the ratchet 3. Since there is no force on one side of the ratchet 3, the sliding rod and the sliding plate 5 can be pulled to slide and reset under the elastic force of the first spring 6 at this time, so that the connecting arm 17, the pressure rope block and the ratchet 3 are reset. After the cam 12 rotates one circle, the highest point of the cam 12 passes over the curved portion 11, and the curved portion 11 rotates and resets under the elastic force of the second spring 16, and is clamped on one side of the ratchet 3. At this time, the first spring 6 returns to a free state, and the pulling force on one side of the sliding plate 5 disappears.

[0027] It should be noted that, during this process, the slider 19 can slide along the slide groove 71 adaptively, the slide rod can slide along the bracket 4, and the slider 19 can rotate relative to the slide plate 5, and the mechanisms will not get stuck.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reset-type elevator speed governor, comprising a base (1), a transmission assembly (9), and a sheave (2) rotatably mounted on the base (1), characterized in that: A ratchet (3) is mounted on one side of the rope wheel (2), a connecting arm (17) is movably hinged on the ratchet (3) through a pin shaft, a rope pressing block is fixed to the end of the connecting arm (17) through a screw, and a slider (19) is slidably arranged on one side of the connecting arm (17), a sliding plate (5) is movably hinged on one side of the slider (19), a bracket (4) is welded on the top of the base (1), a sliding rod is slidably arranged inside the bracket (4), one end of the sliding rod is fixedly connected to the sliding plate (5), and a limiting plate (7) is welded on the other end of the sliding rod, and a first spring (6) is sleeved on the outside of the sliding rod; A rotating rod (8) is movably hinged on the base (1), a stop hook (18) matching the ratchet (3) is fixed to one end of the rotating rod (8) by means of screws, and a bent portion (11) is fixedly provided on the rotating rod (8), an inner groove (15) is provided inside the base (1), a servo motor (10) is fixedly installed on the inner wall of the inner groove (15) by means of bolts, an output end of the servo motor (10) is connected to a driving shaft by means of a coupling, the driving shaft is connected to a driven shaft (13) by means of a transmission assembly (9), a cam (12) is sleeved on the outside of the driven shaft (13), a plurality of balls (14) are mounted on the outer circumference of the cam (12), and the balls (14) are sequentially brought into close contact with one side of the bent portion (11) under the drive of the cam (12); The transmission assembly (9) comprises a driving wheel, a driven wheel and a synchronous belt, wherein the driving wheel and the driven wheel are respectively sleeved on the outside of the driving shaft and the driven shaft (13), and the synchronous belt is sleeved on the outside of the driving wheel and the driven wheel; A sliding groove (71) is provided on one side of the connecting arm (17), and the sliding block (19) is slidably connected to the sliding groove (71); One side of the rotating rod (8) is fixedly connected to a second spring (16) via a buckle, and the other end of the first spring (6) is fixedly connected to the base (1); The bracket (4) is provided with a guide hole, and the slide rod is slidably connected to the slide hole.

2. A reset elevator speed governor according to claim 1, characterized in that: The rotating rod (8) and the curved portion (11) are an integrally formed structure.

3. A reset-type elevator speed governor according to claim 1, characterized in that: The two ends of the first spring (6) are fixedly connected to the bracket (4) and the limiting plate (7) respectively.

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