CN212893336U - Speed limiter with accidental movement prevention function - Google Patents

Abstract

The utility model discloses a speed limiter of unexpected removal function is prevented in area, including governor seat and rope sheave, but install with the rotation rope sheave in the governor seat, be equipped with on the governor seat and be used for preventing the rope sheave removes pivoted speed-limiting mechanism because of elevator car accident, still be equipped with on the governor seat and be used for triggering the unexpected trigger mechanism that removes of speed-limiting mechanism action. When the elevator car moves accidentally, the accidental movement trigger mechanism can trigger the speed limiting mechanism to act, so that the rope wheel is stopped from rotating, and the purpose of protecting passengers is achieved. Is suitable for elevators.

Description

Speed limiter with accidental movement prevention function

Technical Field

The utility model relates to an elevator field specifically is a take overspeed governor of unexpected removal function of preventing.

Background

In recent years, safety accidents of elevators are frequently reported, so that people pay more attention to elevator safety, for example, a shear accident caused by sudden and unexpected movement of an elevator car when the elevator car door is in an open state occurs recently. When the elevator car door is in an open state, the elevator car should not lift in theory, but actually due to various reasons, the shearing accident can be caused, and potential safety hazards are formed to people in the elevator car.

In order to prevent the occurrence of the shearing accident, a speed limiter with an accidental movement prevention function needs to be developed urgently, when an elevator car moves suddenly and accidentally, the speed limiter is triggered to act, so that the elevator car is stopped to move by clamping a steel wire rope and lifting a safety gear, and the safety of the elevator is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a speed limiter of unexpected removal function is prevented in area to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a take overspeed governor of unexpected removal function of preventing, includes governor seat and rope sheave, but install with the rotation of rope sheave in the governor seat, be equipped with on the governor seat and be used for preventing the rope sheave removes pivoted speed limiting mechanism because of elevator car accident, still be equipped with on the governor seat and be used for triggering the unexpected trigger mechanism that removes of speed limiting mechanism action. When the elevator car moves accidentally, the accidental movement trigger mechanism can trigger the speed limiting mechanism to act, so that the rope wheel is stopped from rotating, and the purpose of protecting passengers is achieved.

Furthermore, the speed limiting mechanism comprises a ratchet wheel, a pawl, a push-pull rod return spring, a wedge block mounting seat and a steel wire rope clamping wedge block;

the ratchet wheel is arranged in the governor base in a self-rotating mode, the pawl is rotatably arranged on the side wall of the rope wheel and corresponds to the position of the ratchet wheel, one end of the pawl is provided with a claw matched with a clamping groove in the ratchet wheel, and a claw reset spring used for resetting the claw is arranged between the claw and the rope wheel;

one end of the push-pull rod is hinged to the side wall of the ratchet wheel, a push-pull rod reset spring installation rod is arranged at the other end of the push-pull rod, the push-pull rod reset spring installation rod penetrates through the upper portion of the wedge installation seat, the push-pull rod reset spring is sleeved on the push-pull rod reset spring installation rod, one end of the push-pull rod reset spring abuts against the wedge installation seat, a push-pull rod reset spring adjusting nut used for adjusting the compression degree of the push-pull rod reset spring is arranged on the push-pull rod reset spring installation rod in a position corresponding to the other end of the push-pull rod reset spring, the lower portion of the wedge installation seat is hinged to the speed limiter seat, and the steel wire rope clamping wedge is installed on the wedge installation seat in a position corresponding to a steel wire rope wheel groove of the.

Furthermore, the ratchet wheel and the rope wheel are coaxially arranged, and the steel wire rope clamping wedge block is movably mounted on the wedge block mounting seat through a wedge block rotating shaft. The steel wire rope clamping wedge block is movably mounted on the wedge block mounting seat through the wedge block rotating shaft, so that on one hand, the steel wire rope clamping wedge block is convenient to replace, and on the other hand, after the steel wire rope clamping wedge block is designed into a movable structure, the steel wire rope clamping wedge block can be automatically adjusted to be matched with a steel wire rope, and the steel wire rope is more favorably compressed.

Furthermore, a ratchet wheel limiting stop lever is arranged on the governor base corresponding to the ratchet wheel side wall, a ratchet wheel limiting groove matched with the ratchet wheel limiting stop lever is arranged on the ratchet wheel side wall, and the ratchet wheel limiting stop lever is located in the ratchet wheel limiting groove. The ratchet wheel limiting stop rod and the ratchet wheel limiting groove which are additionally arranged can limit the rotation of the ratchet wheel, and meanwhile, the ratchet wheel limiting stop rod and the ratchet wheel limiting groove can be matched with a return spring of the push-pull rod to adjust the pressing force of the steel wire rope clamping wedge together, so that the pulling force of the steel wire rope is adjusted.

Further, the accidental movement trigger mechanism comprises a pawl firing pin, a striking bow, a trigger electromagnetic switch and a firing pin tension spring;

the middle part of the impact bow is arranged on the governor base in a self-rotating manner, the pawl firing pin is arranged at the position, corresponding to the pawl, of the upper end of the impact bow, the side wall of the pawl is provided with an arc-shaped triggering surface matched with the pawl firing pin, a firing pin tension spring used for enabling the pawl firing pin to be in a state of impacting the arc-shaped triggering surface is arranged at the upper end of the impact bow or between the pawl firing pin and the governor base, and when the pawl firing pin impacts the arc-shaped triggering surface, the pawl firing pin drives the pawl to rotate and enables a clamping jaw on the pawl to be clamped with a clamping groove on the ratchet wheel;

the trigger electromagnetic switch is arranged on the governor base at a position corresponding to the lower end of the impact bow, and the movable end of the trigger electromagnetic switch is hinged with the lower end of the impact bow.

Furthermore, an overhaul hook is movably mounted on the governor base 1 at a position corresponding to the upper end of the impact bow, and an impact bow hook plate matched with the overhaul hook is arranged at the upper end of the impact bow. During the maintenance, will hit bow hook plate through overhauing the couple earlier and catch, make the pawl firing pin keep away from the pawl, at this moment, the pawl just can reset under jack catch reset spring's effect to make the jack catch of pawl deviate from in the draw-in groove on the ratchet, simultaneously, wire rope presss from both sides tight piece of agreeing with and agrees with a piece mount pad and also can reset under push-and-pull rod reset spring's elasticity and loosen compressing tightly wire rope, rope sheave alright free rotation like this, and then make things convenient for the maintenance in later stage.

Furthermore, an overspeed triggering mechanism for triggering the speed limiting mechanism to act is further arranged on the side wall of the rope pulley;

the number of the pawls is two, the two pawls are respectively arranged at two sides of the circle center of the rope pulley, the overspeed trigger mechanism comprises two ball throwing plates, two ball throwing mounting plates, a connecting rod and an elastic connecting rod, the middle parts of the two ball throwing mounting plates are respectively and rotatably mounted on the side wall of the rope wheel at the positions corresponding to the pawls, a pawl linkage rod is arranged at one end of the pawl opposite to the clamping jaw, the pawl linkage rod is abutted against the corresponding ball throwing mounting plates through a pawl linkage adjusting screw rod, the two ball throwing mounting plates are arranged in parallel, two ends of the connecting rod are respectively and movably connected with one end of the two ball throwing mounting plates, one end of the elastic connecting rod is arranged on the side wall of the rope wheel, the other end of the elastic connecting rod is movably connected with the other end of one of the two ball throwing mounting plates, and the two ball throwing plates are respectively mounted on the two ball throwing mounting plates. When the elevator car moves and exceeds the speed, the overspeed trigger mechanism can trigger the speed limiting mechanism to act, so that the rope wheel is stopped from rotating, and the purpose of protecting passengers is achieved.

Furthermore, the elastic connecting rod comprises a connecting screw rod, a connecting rod spring adjusting nut and a connecting rod mounting block, the connecting screw rod is movably inserted into the mounting part on the side wall of the rope wheel, the connecting rod spring is sleeved on the screw rod part of the connecting screw rod, the connecting rod spring adjusting nut is also sleeved on the screw rod part of the connecting screw rod and presses the connecting rod spring on the mounting part on the side wall of the rope wheel, and the end of the screw rod part of the connecting screw rod is movably mounted on the corresponding ball throwing mounting plate through the connecting rod mounting block. The elastic connecting rod is adopted to replace one connecting rod in the traditional quadrilateral connecting rod mechanism, so that the volume of the quadrilateral connecting rod mechanism can be reduced, the structure is more compact, the installation is more convenient, and meanwhile, the connecting rod spring can also be used for adjusting the action speed of the speed limiter.

Furthermore, an elevator safety loop switch is installed on the governor base, and a switch firing pin is arranged on the outer side wall of the throwing ball.

Furthermore, the governor base is formed by assembling a governor base main body and a governor base vertical plate. The speed limiter base is designed into a split structure, so that the installation and the disassembly of all parts are convenient.

Compared with the prior art, the beneficial effects of the utility model are that:

1. when the elevator car moves accidentally, the accidental movement trigger mechanism can trigger the speed limiting mechanism to act, so that the rope wheel stops rotating, and the purpose of protecting passengers is achieved;

2. when the unexpected movement detection subsystem of the elevator detects that the elevator car moves unexpectedly, the unexpected movement detection subsystem cuts off the power supply of the trigger electromagnetic switch, the movable end of the trigger electromagnetic switch can move freely, at the moment, the upper end of the impact bow can drive the pawl firing pin to move towards the circle center direction of the ratchet wheel under the elastic force of the firing pin tension spring until the pawl firing pin impacts the arc trigger surface of the pawl, and simultaneously the pawl can be driven to rotate along with the rotation of the rope wheel, and the clamping jaw on the pawl is clamped with the clamping groove on the ratchet wheel, so that the rope wheel can drive the ratchet wheel to rotate together through the pawl, the ratchet wheel can drive the push-pull rod to move, the push-pull rod can touch the elevator safety loop switch to cut off the safety loop of the elevator, and simultaneously the push-pull rod drives the upper part of the wedge block mounting seat to turn towards the rope wheel through the push-pull rod reset spring, so that the steel wire rope on the wedge, further stopping the rotation of the rope wheel, and lifting the safety gear to prevent the elevator car from moving continuously;

3. during maintenance, the impact bow hook plate is hooked through the maintenance hook, so that the pawl firing pin is far away from the pawl, the rope wheel can freely rotate, and maintenance is facilitated;

4. the speed limiter base is designed into a split structure, so that the installation and the disassembly of all parts are convenient.

Drawings

Fig. 1 is a schematic structural diagram of the governor in an initial state.

Fig. 2 is a schematic structural diagram of the elevator when the pawl firing pin 4a strikes the pawl 3b and forms a clamping connection with the clamping groove 3a1 when the elevator car moves unexpectedly.

Fig. 3 is a simplified schematic diagram of fig. 2.

Fig. 4 is a schematic view showing the push-pull rod 3c touching the striker 6a of the elevator safety circuit switch 6 when the state of fig. 2 is moved further.

Fig. 5 is a simplified schematic diagram of fig. 4.

Fig. 6 is a schematic structural view of the wire rope clamping wedge 3f pressing the wire rope a into the wire rope groove 2a when the state of fig. 4 continues to move.

Fig. 7 is a simplified schematic diagram of fig. 6.

Fig. 8 is a schematic structural diagram of the case where the switch striker 5e touches the elevator safety circuit switch 6 when the rotation speed of the sheave 2 exceeds the first warning rotation speed.

Fig. 9 is a simplified schematic diagram of fig. 8.

Fig. 10 is a schematic structural diagram of the state that when the rope pulley 2 in fig. 8 continues to accelerate and reaches the second early warning rotating speed, a quadrangle formed by two ball throwing mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d is further deformed, so that the ball throwing mounting plates 5b drive the pawls 3b to rotate through the pawl linkage adjusting screw rods 3b5 and the pawl linkage rods 3b4, and the pawls 3b1 and the clamping grooves 3a1 are clamped.

Fig. 11 is a simplified schematic of fig. 10.

Fig. 12 is a schematic structural view of the wire rope clamping wedge 3f pressing the wire rope a into the wire rope groove 2a when the state of fig. 10 continues to move.

Fig. 13 is a simplified schematic of fig. 12.

Fig. 14 is a schematic top view of the structure of fig. 1.

Fig. 15 is a rear view of fig. 1.

Fig. 16 is a schematic structural view of a governor base main body.

Fig. 17 is a schematic view of a sheave structure.

Fig. 18 is a side view of the structure of fig. 17.

Fig. 19 is a schematic top view of the structure of fig. 17.

Fig. 20 is a schematic view of the pawl structure.

Fig. 21 is a schematic top view of the structure of fig. 20.

Fig. 22 is a schematic structural view of a ball throwing device.

Fig. 23 is a side view of the structure of fig. 22.

Fig. 24 is a schematic top view of fig. 22.

FIG. 25 is a schematic structural view of a ball slinger mounting plate.

Fig. 26 is a schematic top view of the structure of fig. 25.

Fig. 27 is a schematic structural view of a connecting rod.

As shown in the figure: the device comprises a governor base 1, a governor base main body 1a, a governor base vertical plate 1b, a rope pulley 2, a steel wire rope wheel groove 2a, a mounting part 2b, a governor mechanism 3, a ratchet wheel 3a, a clamping groove 3a1, a ratchet wheel limit stop rod 3a2, a ratchet wheel limit groove 3a3, a pawl 3b1, a pawl reset spring 3b2, an arc triggering surface 3b3, a pawl linkage rod 3b4, a pawl linkage adjusting screw rod 3b5, a push-pull rod 3c, a push-pull rod reset spring mounting rod 3c1, a push-pull rod reset spring adjusting nut 3c2, a push-pull rod reset spring 3d, a wedge mounting seat 3e, a steel wire rope clamping wedge 3f, a wedge rotating shaft 3f1, an accidental movement triggering mechanism 4, a pawl firing pin 4a, a striking bow 4b, a striking bow hook plate 4b1, a triggering electromagnetic switch 4c, a firing pin 4d, an overspeed triggering mechanism 5, a throwing ball 5a throwing ball mounting plate 5b and a, the elevator safety circuit comprises an elastic connecting rod 5d, a connecting screw rod 5d1, a connecting rod spring 5d2, a connecting rod spring adjusting nut 5d3, a connecting rod mounting block 5d4, a switch striker 5e, an elevator safety circuit switch 6, a striker 6a, an overhaul hook 7 and a steel wire rope a.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 27, in an embodiment of the present invention, a speed governor with an accidental movement prevention function includes a governor base 1 and a rope pulley 2, the rope pulley 2 is rotatably installed in the governor base 1, a speed limiting mechanism 3 for preventing the rope pulley 2 from rotating due to an accidental movement of an elevator car is disposed on the governor base 1, and an accidental movement trigger mechanism 4 for triggering the speed limiting mechanism 3 to operate is further disposed on the governor base 1. When the elevator car moves accidentally, the accidental movement trigger mechanism 4 can trigger the speed limiting mechanism 3 to act, so that the rope pulley 2 stops rotating, and the purpose of protecting passengers is achieved.

The speed limiting mechanism 3 comprises a ratchet wheel 3a, a pawl 3b, a push-pull rod 3c, a push-pull rod return spring 3d, a wedge block mounting seat 3e and a steel wire rope clamping wedge block 3 f; the ratchet wheel 3a is rotatably arranged in the governor base 1, the pawl 3b is rotatably arranged on the side wall of the rope wheel 2 at a position corresponding to the ratchet wheel 3a, one end of the pawl 3b is a claw 3b1 matched with a clamping groove 3a1 on the ratchet wheel 3a, and a claw return spring 3b2 for returning the claw 3b1 is arranged between the claw 3b1 and the rope wheel 2; one end of the push-pull rod 3c is hinged with the side wall of the ratchet wheel 3a, the other end of the push-pull rod 3c is provided with a push-pull rod return spring mounting rod 3c1, the push-pull rod return spring mounting rod 3c1 penetrates through the upper part of the wedge block mounting seat 3e, the push-pull rod return spring 3d is sleeved on the push-pull rod return spring mounting rod 3c1, one end of the push-pull rod return spring 3d is abutted against the wedge block mounting seat 3e, a push-pull rod return spring adjusting nut 3c2 for adjusting the compression degree of the push-pull rod return spring 3d is arranged on the push-pull rod return spring mounting rod 3c1 corresponding to the other end of the push-pull rod return spring 3d, the lower part of the wedge block mounting seat 3e is hinged on the governor base 1, and the steel wire rope clamping wedge block 3f is mounted on the wedge block mounting seat 3e at a position corresponding to the steel wire rope wheel groove 2a of the rope wheel 2.

The ratchet wheel 3a and the rope wheel 2 are coaxially arranged, and the steel wire rope clamping wedge block 3f is movably mounted on the wedge block mounting seat 3e through a wedge block rotating shaft 3f 1. The steel wire rope clamping wedge 3f is movably mounted on the wedge mounting seat 3e through the wedge rotating shaft 3f1, so that on one hand, the steel wire rope clamping wedge 3f is convenient to replace, and on the other hand, after the steel wire rope clamping wedge 3f is designed to be of a movable structure, the steel wire rope clamping wedge 3f can be automatically adjusted to be matched with the steel wire rope a, and the steel wire rope a is more favorably compressed. A ratchet wheel limiting stop lever 3a2 is arranged on the governor base 1 corresponding to the side wall of the ratchet wheel 3a, a ratchet wheel limiting groove 3a3 matched with the ratchet wheel limiting stop lever 3a2 is arranged on the side wall of the ratchet wheel 3a, and the ratchet wheel limiting stop lever 3a2 is positioned in the ratchet wheel limiting groove 3a 3. The additional ratchet wheel limit stop rod 3a2 and the ratchet wheel limit groove 3a3 can limit the rotation of the ratchet wheel 3a, and meanwhile, the ratchet wheel limit stop rod 3a2 and the ratchet wheel limit groove 3a3 can also cooperate with a push-pull rod return spring 3d to adjust the pressing force of the steel wire rope clamping wedge 3f together, so that the lifting force of the steel wire rope is adjusted.

The accidental movement trigger mechanism 4 comprises a pawl firing pin 4a, a striking bow 4b, a trigger electromagnetic switch 4c and a firing pin tension spring 4 d; the middle part of the impact bow 4b is rotatably mounted on the governor base 1, the pawl firing pin 4a is mounted at the upper end of the impact bow 4b at a position corresponding to the pawl 3b, an arc-shaped triggering surface 3b3 matched with the pawl firing pin 4a is arranged on the side wall of the pawl 3b, a firing pin tension spring 4d for enabling the pawl firing pin 4a to be in a state of impacting the arc-shaped triggering surface 3b3 is arranged at the upper end of the impact bow 4b or between the pawl firing pin 4a and the governor base 1, when the pawl firing pin 4a impacts the arc-shaped triggering surface 3b3, the pawl 3b is driven to rotate, and the claw 3b1 on the pawl 3b can be clamped with the clamping groove 3a1 on the ratchet wheel 3 a; the trigger electromagnetic switch 4c is arranged on the governor base 1 and corresponds to the lower end of the impact bow 4b, the movable end of the trigger electromagnetic switch 4c is hinged with the lower end of the impact bow 4b, and the trigger electromagnetic switch 4c is electrically connected in a circuit of an accidental movement detection subsystem of the elevator.

In the initial state, the trigger electromagnetic switch 4c is in the electrified attraction state, the pawl 3b is not clamped with the ratchet wheel 3a, and the rope wheel 2 can rotate freely; when the unexpected movement detection subsystem of the elevator detects that the elevator car moves unexpectedly, the unexpected movement detection subsystem cuts off the power supply of the trigger electromagnetic switch 4c, the movable end of the trigger electromagnetic switch 4c can move freely, at the moment, the upper end of the impact bow 4b can drive the pawl firing pin 4a to move towards the circle center direction of the ratchet wheel 3a under the action of the elastic force of the firing pin tension spring 4d until the pawl firing pin 4a impacts the arc trigger surface 3b3 of the pawl 3b, simultaneously the pawl 3b can be driven to rotate along with the rotation of the rope pulley 2, the claw 3b1 on the pawl 3b is clamped with the clamping groove 3a1 on the ratchet wheel 3a, so that the rope pulley 2 can drive the ratchet wheel 3a to rotate together through the pawl 3b, the ratchet wheel 3a can drive the push-pull rod 3c to move, the push-pull rod 3c can touch the elevator safety loop switch 6, and the safety loop of the elevator is, meanwhile, the push-pull rod 3c drives the upper part of the wedge block mounting seat 3e to turn towards the rope pulley 2 through the push-pull rod return spring 3d, so that the steel wire rope clamping wedge block 3f on the wedge block mounting seat 3e tightly presses the steel wire rope a in the steel wire rope wheel groove 2a of the rope pulley 2, the rotation of the rope pulley 2 is stopped, and the safety tongs are lifted to prevent the elevator car from moving continuously.

An overhaul hook 7 is movably mounted on the governor base 1 corresponding to the upper end of the impact bow 4b, and an impact bow hook plate 4b1 matched with the overhaul hook 7 is arranged at the upper end of the impact bow 4 b. During maintenance, the impact bow hook plate 4b1 is hooked through the maintenance hook 7 to enable the pawl firing pin 4a to be far away from the pawl 3b, at the moment, the pawl 3b can reset under the action of the pawl reset spring 3b2, so that the pawl 3b1 of the pawl 3b is separated from the clamping groove 3a1 on the ratchet wheel 3a, meanwhile, the steel wire rope clamping wedge 3f and the wedge mounting seat 3e can also reset under the elasticity of the push-pull rod reset spring 3d to loosen the compression of the steel wire rope, and the rope pulley 2 can rotate freely, so that later-stage maintenance is facilitated.

The side wall of the rope wheel 2 is also provided with an overspeed triggering mechanism 5 for triggering the speed limiting mechanism 3 to act; the number of the pawls 3b is two, the pawls 3b are respectively arranged on two sides of the circle center of the rope pulley 2, the overspeed triggering mechanism 5 comprises two throwing balls 5a, two throwing ball mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d, the middle parts of the two throwing ball mounting plates 5b are respectively and rotatably mounted on the side wall of the rope pulley 2 corresponding to the pawls 3b, a pawl linkage rod 3b4 is arranged at one end, opposite to the claw 3b1, of the pawl 3b, the pawl linkage rod 3b4 is abutted to the corresponding throwing ball mounting plate 5b through a pawl linkage adjusting screw rod 3b5, the relative position between the pawl linkage rod 3b4 and the throwing ball mounting plate 5b can be adjusted by rotating the position of the pawl linkage adjusting screw rod 3b5, and the initial relative position between the claw 3b1 and the claw 3a1 can be adjusted, can adjust overspeed trigger mechanism 5 like this and trigger required rope sheave 2's during the action of speed limiting mechanism 3 rotational speed to can set for second early warning rotational speed, two get rid of ball mounting panel 5b parallel arrangement, the both ends of connecting rod 5c respectively with two get rid of the one end swing joint of ball mounting panel 5b, the one end of elastic connecting rod 5d is installed on 2 lateral walls of rope sheave, the other end and two of elastic connecting rod 5d get rid of the other end swing joint of one in the ball mounting panel 5b, two get rid of ball 5a and install respectively two get rid of on the ball mounting panel 5 b. When the elevator car moves and exceeds the speed, the overspeed triggering mechanism 5 can trigger the speed limiting mechanism 3 to act, so that the rope pulley 2 is stopped to rotate, and the purpose of protecting passengers is achieved.

The elastic connecting rod 5d comprises a connecting screw rod 5d1, a connecting rod spring 5d2, a connecting rod spring adjusting nut 5d3 and a connecting rod mounting block 5d4, wherein the connecting screw rod 5d1 is movably inserted into the mounting part 2b on the side wall of the rope sheave 2, the connecting rod spring 5d2 is sleeved on the screw rod part of the connecting screw rod 5d1, the connecting rod spring adjusting nut 5d3 is also sleeved on the screw rod part of the connecting screw rod 5d1 and presses the connecting rod spring 5d2 on the mounting part 2b on the side wall of the rope sheave 2, and the end of the screw rod part of the connecting screw rod 5d1 is movably mounted on the corresponding ball throwing mounting plate 5b through the connecting rod mounting block 5d 4. The elastic connecting rod 5d is adopted to replace one connecting rod in the traditional quadrilateral connecting rod mechanism, so that the volume of the quadrilateral connecting rod mechanism can be reduced, the structure is more compact, the installation is more convenient, and meanwhile, the connecting rod spring 5d can also be used for adjusting the action speed of the speed limiter. An elevator safety loop switch 6 is installed on the governor base 1, the elevator safety loop switch 6 is connected in series on a safety loop of an elevator, and a switch firing pin 5e is arranged on the outer side wall of the throwing ball 5 a. The elevator safety loop switch 6 is provided with a collision rod 6a, so that the push-pull rod 3c can be conveniently touched.

When the rotating speed of the rope wheel 2 is within a normal rotating speed range, the switch firing pin 5e on the outer side wall of the throwing ball 5a cannot touch the elevator safety loop switch 6, and when the rotating speed of the rope wheel 2 exceeds a first early warning rotating speed (the first early warning rotating speed can be adjusted according to the installation position of the switch firing pin 5e on the throwing ball 5a), the throwing ball 5a can drive a quadrilateral deformation formed by two throwing ball installation plates 5b, a connecting rod 5c and an elastic connecting rod 5d under the action of centrifugal force, so that the switch firing pin 5e on the outer side wall of the throwing ball 5a moves in a direction which is far away from the circle center of the rope wheel 2 until the switch 6 of the elevator safety loop is touched, and the elevator safety loop is disconnected; if the rope pulley 2 continues to accelerate and reaches a second early warning rotating speed, under the action of centrifugal force, the throwing ball 5a drives a quadrangle formed by two throwing ball mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d to further deform, so that the throwing ball mounting plates 5b drive the pawls 3b to rotate through the pawl linkage adjusting screw rods 3b5 and the pawl linkage rods 3b4, and the claws 3b1 on the pawls 3b are clamped with the clamping grooves 3a1 on the ratchet wheels 3a, so that the rope pulley 2 drives the ratchet wheels 3a to rotate together through the pawls 3b, the ratchet wheels 3a drive the push-pull rod 3c to move, the push-pull rod 3c drives the upper parts of the wedge block mounting seats 3e to turn towards the rope pulley 2 through the push-pull rod reset springs 3d, and the steel wire rope clamping wedge blocks 3f on the wedge block mounting seats 3e tightly press the steel wire ropes a in the steel wire rope pulley grooves 2a of the rope pulley 2, and then the rotation of the rope wheel 2 is stopped, and the safety gear is lifted to prevent the elevator car from moving continuously.

The governor base 1 is formed by assembling a governor base main body 1a and a governor base vertical plate 1 b. The speed limiter base 1 is designed into a split structure, so that the installation and the disassembly of all parts are convenient.

The working principle of the speed limiter is as follows:

in the initial state, the trigger electromagnetic switch 4c is in the electrified attraction state, the pawl 3b is not clamped with the ratchet wheel 3a, the rope wheel 2 can freely rotate, and meanwhile, the elevator safety loop switch 6 is also in the closed state.

When the unexpected movement detection subsystem of the elevator detects that the elevator car moves unexpectedly, the unexpected movement detection subsystem cuts off the power supply of the trigger electromagnetic switch 4c, the movable end of the trigger electromagnetic switch 4c can move freely, at the moment, the upper end of the impact bow 4b drives the pawl firing pin 4a to move towards the circle center direction of the ratchet wheel 3a under the action of the elastic force of the firing pin tension spring 4d until the pawl firing pin 4a impacts the arc trigger surface 3b3 of the pawl 3b, and simultaneously, the pawl 3b can be driven to rotate along with the rotation of the rope pulley 2, the claw 3b1 on the pawl 3b is clamped with the clamping groove 3a1 on the ratchet wheel 3a, so that the rope pulley 2 drives the ratchet wheel 3a to rotate together through the pawl 3b, the ratchet wheel 3a drives the push-pull rod 3c to move, the push-pull rod 3c can touch the impact rod 6a on the elevator safety loop switch 6, and the safety loop of the, meanwhile, the push-pull rod 3c drives the upper part of the wedge block mounting seat 3e to turn towards the rope pulley 2 through the push-pull rod return spring 3d, so that the steel wire rope clamping wedge block 3f on the wedge block mounting seat 3e tightly presses the steel wire rope a in the steel wire rope wheel groove 2a of the rope pulley 2, the rotation of the rope pulley 2 is stopped, and the safety tongs are lifted to prevent the elevator car from moving continuously.

When the rotation speed of the sheave 2 is within the normal rotation speed range, the switch striker 5e on the outer side wall of the slinger 5a does not touch the elevator safety circuit switch 6.

When the rotating speed of the rope wheel 2 exceeds the first early warning rotating speed, the throwing ball 5a drives the quadrilateral deformation formed by the two throwing ball mounting plates 5b, the connecting rod 5c and the elastic connecting rod 5d under the action of centrifugal force, so that the switch firing pin 5e on the outer side wall of the throwing ball 5a moves in the direction far away from the circle center of the rope wheel 2 until the switch 6 of the safety loop of the elevator is touched, and the safety loop of the elevator is disconnected; if the rope pulley 2 continues to accelerate and reaches a second early warning rotating speed, under the action of centrifugal force, the throwing ball 5a drives a quadrangle formed by two throwing ball mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d to further deform, so that the throwing ball mounting plates 5b drive the pawls 3b to rotate through the pawl linkage adjusting screw rods 3b5 and the pawl linkage rods 3b4, and the claws 3b1 on the pawls 3b are clamped with the clamping grooves 3a1 on the ratchet wheels 3a, so that the rope pulley 2 drives the ratchet wheels 3a to rotate together through the pawls 3b, the ratchet wheels 3a drive the push-pull rod 3c to move, the push-pull rod 3c drives the upper parts of the wedge block mounting seats 3e to turn towards the rope pulley 2 through the push-pull rod reset springs 3d, and the steel wire rope clamping wedge blocks 3f on the wedge block mounting seats 3e tightly press the steel wire ropes a in the steel wire rope pulley grooves 2a of the rope pulley 2, and then the rotation of the rope wheel 2 is stopped, and the safety gear is lifted to prevent the elevator car from moving continuously.

During maintenance, the impact bow hook plate 4b1 is hooked through the maintenance hook 7 to enable the pawl firing pin 4a to be far away from the pawl 3b, at the moment, the pawl 3b can reset under the action of the pawl reset spring 3b2, so that the pawl 3b1 of the pawl 3b is separated from the clamping groove 3a1 on the ratchet wheel 3a, meanwhile, the steel wire rope clamping wedge 3f and the wedge mounting seat 3e can also reset under the elasticity of the push-pull rod reset spring 3d to loosen the compression of the steel wire rope, and the rope pulley 2 can rotate freely, so that later-stage maintenance is facilitated.

When the elevator car moves accidentally, the accidental movement trigger mechanism 4 triggers the speed limiting mechanism 3 to act so as to stop the rope pulley 2 from rotating and achieve the purpose of protecting passengers; the steel wire rope clamping wedge 3f is movably mounted on the wedge mounting seat 3e through a wedge rotating shaft 3f1, so that on one hand, the steel wire rope clamping wedge 3f is convenient to replace, and on the other hand, after the steel wire rope clamping wedge 3f is designed into a movable structure, the steel wire rope clamping wedge 3f can automatically adjust the adaptive position of the steel wire rope a, and the steel wire rope a is more favorably compressed; the additional ratchet wheel limit stop lever 3a2 and the ratchet wheel limit groove 3a3 can limit the rotation of the ratchet wheel 3 a; when the unexpected movement detection subsystem of the elevator detects that the elevator car moves unexpectedly, the unexpected movement detection subsystem cuts off the power supply of the trigger electromagnetic switch 4c, the movable end of the trigger electromagnetic switch 4c can move freely, at the moment, the upper end of the impact bow 4b can drive the pawl firing pin 4a to move towards the circle center direction of the ratchet wheel 3a under the action of the elastic force of the firing pin tension spring 4d until the pawl firing pin 4a impacts the arc trigger surface 3b3 of the pawl 3b, simultaneously the pawl 3b can be driven to rotate along with the rotation of the rope pulley 2, the claw 3b1 on the pawl 3b is clamped with the clamping groove 3a1 on the ratchet wheel 3a, so that the rope pulley 2 can drive the ratchet wheel 3a to rotate together through the pawl 3b, the ratchet wheel 3a can drive the push-pull rod 3c to move, the push-pull rod 3c can touch the elevator safety loop switch 6, and the safety loop of the elevator is, meanwhile, the push-pull rod 3c drives the upper part of the wedge block mounting seat 3e to turn towards the rope pulley 2 through the push-pull rod return spring 3d, so that the steel wire rope clamping wedge block 3f on the wedge block mounting seat 3e tightly presses the steel wire rope a in the steel wire rope wheel groove 2a of the rope pulley 2, the rotation of the rope pulley 2 is stopped, and the safety tongs are lifted to prevent the elevator car from moving continuously.

Meanwhile, when the speed governor is overhauled, the impact bow hook plate 4b1 is hooked through the overhauling hook 7 to enable the pawl firing pin 4a to be far away from the pawl 3b, at the moment, the pawl 3b can reset under the action of the pawl reset spring 3b2, so that the pawl 3b1 of the pawl 3b is separated from the clamping groove 3a1 on the ratchet wheel 3a, and meanwhile, the steel wire rope clamping wedge 3f and the wedge mounting seat 3e can also reset under the elastic force of the push-pull rod reset spring 3d to loosen the compression of the steel wire rope, so that the rope pulley 2 can freely rotate, and the later-stage maintenance is facilitated;

moreover, when the elevator car moves and exceeds the speed, the overspeed triggering mechanism 5 can trigger the speed limiting mechanism 3 to act, so that the rope pulley 2 is stopped from rotating, and the purpose of protecting passengers is achieved; the elastic connecting rod 5d is adopted to replace one connecting rod in the traditional quadrilateral connecting rod mechanism, so that the volume of the quadrilateral connecting rod mechanism can be reduced, and the structure is more compact and the installation is more convenient; when the rotating speed of the rope wheel 2 exceeds the first early warning rotating speed, the throwing ball 5a drives the quadrilateral deformation formed by the two throwing ball mounting plates 5b, the connecting rod 5c and the elastic connecting rod 5d under the action of centrifugal force, so that the switch firing pin 5e on the outer side wall of the throwing ball 5a moves in the direction far away from the circle center of the rope wheel 2 until the switch 6 of the safety loop of the elevator is touched, and the safety loop of the elevator is disconnected; if the rope pulley 2 continues to accelerate and reaches a second early warning rotating speed, under the action of centrifugal force, the throwing ball 5a drives a quadrangle formed by two throwing ball mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d to further deform, so that the throwing ball mounting plates 5b drive the pawls 3b to rotate through the pawl linkage adjusting screw rods 3b5 and the pawl linkage rods 3b4, and the claws 3b1 on the pawls 3b are clamped with the clamping grooves 3a1 on the ratchet wheels 3a, so that the rope pulley 2 drives the ratchet wheels 3a to rotate together through the pawls 3b, the ratchet wheels 3a drive the push-pull rod 3c to move, the push-pull rod 3c drives the upper parts of the wedge block mounting seats 3e to turn towards the rope pulley 2 through the push-pull rod reset springs 3d, and the steel wire rope clamping wedge blocks 3f on the wedge block mounting seats 3e tightly press the steel wire ropes a in the steel wire rope pulley grooves 2a of the rope pulley 2, further stopping the rotation of the rope pulley 2, and lifting the safety gear to prevent the elevator car from moving continuously;

finally, the speed limiter is in a split structure by designing the speed limiter base 1, so that the installation and the disassembly of all parts are convenient.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention, and the following claims are therefore to be read in this light of the appended claims.

Claims (9)

1. The utility model provides a speed limiter of unexpected removal function is prevented in area, includes governor seat (1) and rope sheave (2), but install rope sheave (2) rotation ground in governor seat (1), its characterized in that, be equipped with on governor seat (1) and be used for preventing rope sheave (2) are because of elevator car unexpected removal pivoted speed limiting mechanism (3), still be equipped with on governor seat (1) and be used for triggering unexpected removal trigger mechanism (4) of speed limiting mechanism (3) action, governor seat (1) is assembled by governor seat main part (1a) and governor seat riser (1b) and is formed.

2. The speed limiter with the function of preventing accidental movement according to claim 1, characterized in that the speed limiting mechanism (3) comprises a ratchet wheel (3a), a pawl (3b), a push-pull rod (3c), a push-pull rod return spring (3d), a wedge block mounting seat (3e) and a steel wire rope clamping wedge block (3 f);

the ratchet wheel (3a) is rotatably arranged in the governor base (1), the pawl (3b) is rotatably arranged on the side wall of the rope wheel (2) at a position corresponding to the ratchet wheel (3a), one end of the pawl (3b) is a claw (3b1) matched with a clamping groove (3a1) on the ratchet wheel (3a), and a claw return spring (3b2) for returning the claw (3b1) is arranged between the claw (3b1) and the rope wheel (2);

one end of the push-pull rod (3c) is hinged with the side wall of the ratchet wheel (3a), the other end of the push-pull rod (3c) is provided with a push-pull rod reset spring installation rod (3c1), the push-pull rod reset spring installation rod (3c1) penetrates through the upper part of the wedge block installation seat (3e), the push-pull rod reset spring (3d) is sleeved on the push-pull rod reset spring installation rod (3c1), one end of the push-pull rod reset spring (3d) is abutted against the wedge block installation seat (3e), a push-pull rod reset spring adjusting nut (3c2) used for adjusting the compression degree of the push-pull rod reset spring (3d) is arranged on the push-pull rod reset spring installation rod (3c1) corresponding to the other end of the push-pull rod reset spring (3d), and the lower part of the wedge block installation seat (3e) is hinged on the speed limiter seat (1), the steel wire rope clamping wedge block (3f) is arranged on the wedge block mounting seat (3e) at a position corresponding to a steel wire rope wheel groove (2a) of the rope wheel (2).

3. The speed limiter with the function of preventing accidental movement according to claim 2, characterized in that the ratchet wheel (3a) is arranged coaxially with the rope pulley (2), and the steel wire rope clamping wedge (3f) is movably mounted on the wedge mounting seat (3e) through a wedge rotating shaft (3f 1).

4. The speed limiter with the function of preventing accidental movement according to claim 2, characterized in that a ratchet limiting stop lever (3a2) is arranged on the position, corresponding to the side wall of the ratchet (3a), of the speed limiter base (1), a ratchet limiting groove (3a3) matched with the ratchet limiting stop lever (3a2) is arranged on the side wall of the ratchet (3a), and the ratchet limiting stop lever (3a2) is located in the ratchet limiting groove (3a 3).

5. The speed limiter with the function of preventing accidental movement according to claim 2, characterized in that the accidental movement triggering mechanism (4) comprises a pawl firing pin (4a), a striking bow (4b), a triggering electromagnetic switch (4c) and a firing pin tension spring (4 d);

the middle part of the impact bow (4b) is arranged on the governor base (1) in a rotating way, the pawl firing pin (4a) is arranged at the position of the upper end of the impact bow (4b) corresponding to the pawl (3b), an arc triggering surface (3b3) matched with the pawl firing pin (4a) is arranged on the side wall of the pawl (3b), a firing pin tension spring (4d) used for enabling the pawl firing pin (4a) to be in a state of striking the arc triggering surface (3b3) is arranged at the upper end of the impact bow (4b) or between the pawl firing pin (4a) and the governor base (1), when the pawl firing pin (4a) hits the arc-shaped triggering surface (3b3), the pawl (3b) is driven to rotate, the claw (3b1) on the pawl (3b) can be clamped with the clamping groove (3a1) on the ratchet wheel (3 a);

the trigger electromagnetic switch (4c) is arranged on the governor base (1) and corresponds to the lower end of the impact bow (4b), and the movable end of the trigger electromagnetic switch (4c) is hinged with the lower end of the impact bow (4 b).

6. The speed limiter with the function of preventing accidental movement according to claim 5, characterized in that a maintenance hook (7) is movably mounted on the governor base (1) at a position corresponding to the upper end of the impact bow (4b), and an impact bow hook plate (4b1) matched with the maintenance hook (7) is arranged at the upper end of the impact bow (4 b).

7. The speed limiter with the function of preventing accidental movement according to claim 2, characterized in that an overspeed triggering mechanism (5) for triggering the speed limiting mechanism (3) to act is further arranged on the side wall of the rope pulley (2);

the number of the pawls (3b) is two, the pawls (3b) are respectively arranged at two sides of the circle center of the rope wheel (2), the overspeed trigger mechanism (5) comprises two throwing balls (5a), two throwing ball mounting plates (5b), a connecting rod (5c) and an elastic connecting rod (5d), the middle parts of the two throwing ball mounting plates (5b) are respectively and rotatably arranged at the positions, corresponding to the pawls (3b), on the side wall of the rope wheel (2), of the pawls (3b), one ends, opposite to the claws (3b1), of the pawls (3b) are provided with pawl linkage rods (3b4), the pawl linkage rods (3b4) are abutted against the corresponding throwing ball mounting plates (5b) through pawl linkage adjusting screw rods (3b5), the two throwing ball mounting plates (5b) are arranged in parallel, two ends of the connecting rod (5c) are respectively and movably connected with one ends of the two throwing ball mounting plates (5b), one end of each elastic connecting rod (5d) is installed on the side wall of the rope wheel (2), the other end of each elastic connecting rod (5d) is movably connected with the other end of one of the two ball throwing mounting plates (5b), and the two ball throwing mounting plates (5b) are respectively provided with two balls (5 a).

8. The speed limiter with function of preventing accidental movement according to claim 7, the elastic connecting rod (5d) comprises a connecting screw rod (5d1), a connecting rod spring (5d2), a connecting rod spring adjusting nut (5d3) and a connecting rod mounting block (5d4), the connecting screw rod (5d1) is movably inserted on the mounting part (2b) on the side wall of the rope pulley (2), the connecting rod spring (5d2) is sleeved on the screw part of the connecting screw rod (5d1), the link spring adjusting nut (5d3) is also fitted over the screw portion of the connecting screw (5d1) and press-fits the link spring (5d2) to a fitting portion on the side wall of the sheave (2), the end of the screw part of the connecting screw (5d1) is movably arranged on the corresponding ball throwing mounting plate (5b) through the connecting rod mounting block (5d 4).

9. The speed limiter with the function of preventing accidental movement according to claim 7, characterized in that an elevator safety circuit switch (6) is installed on the speed limiter base (1), and a switch firing pin (5e) is arranged on the outer side wall of the throwing ball (5 a).

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