A speed limiter with function of preventing accidental movement

Abstract

The present invention discloses a speed limiter with an anti-accidental movement function, comprising a speed limiter seat and a rope pulley, wherein the rope pulley is rotatably installed in the speed limiter seat, the speed limiter seat is provided with a speed limiting mechanism for preventing the rope pulley from rotating due to the accidental movement of the elevator car, and the speed limiter seat is also provided with an accidental movement triggering mechanism for triggering the action of the speed limiting mechanism. When the elevator car moves unexpectedly, the accidental movement triggering mechanism will trigger the action of the speed limiting mechanism, thereby stopping the rope pulley from rotating, thereby achieving the purpose of protecting passengers. It is suitable for elevators.

Description

Technical Field

[0001] The invention relates to the field of elevators, in particular to a speed limiter with an accidental movement prevention function. Background Art

[0002] In recent years, there have been frequent reports of elevator safety accidents, which has made people pay more attention to elevator safety. For example, recently there has been a shearing accident caused by the elevator car moving unexpectedly when the elevator car door is open. When the elevator car door is open, the elevator car should not be raised or lowered in theory, but in reality, due to various reasons, such shearing accidents may occur, posing a potential safety hazard to people in the elevator car.

[0003] In order to prevent such shearing accidents from happening, we urgently need to develop a speed limiter with an anti-accidental movement function. When the elevator car moves suddenly and unexpectedly, the speed limiter is triggered to stop the movement of the elevator car by clamping the wire rope and pulling the safety clamp to improve the safety of the elevator. Summary of the invention

[0004] The object of the present invention is to provide a speed limiter with an anti-accidental movement function to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A speed limiter with an anti-accidental movement function comprises a speed limiter seat and a rope pulley, wherein the rope pulley is rotatably installed in the speed limiter seat, the speed limiter seat is provided with a speed limiting mechanism for preventing the rope pulley from rotating due to the accidental movement of the elevator car, and the speed limiter seat is also provided with an accidental movement triggering mechanism for triggering the speed limiting mechanism to operate. When the elevator car moves unexpectedly, the accidental movement triggering mechanism will trigger the speed limiting mechanism to operate, thereby stopping the rope pulley from rotating, thereby achieving the purpose of protecting passengers.

[0007] Furthermore, the speed limiting mechanism includes a ratchet, a pawl, a push-pull rod, a push-pull rod return spring, a wedge mounting seat and a wire rope clamping wedge;

[0008] The ratchet wheel is rotatably mounted in the speed limiter seat, the pawl is rotatably mounted on the side wall of the rope wheel at a position corresponding to the ratchet wheel, one end of the pawl is a claw that matches the slot on the ratchet wheel, and a claw reset spring for resetting the claw is provided between the claw and the rope wheel;

[0009] One end of the push-pull rod is hinged to the side wall of the ratchet wheel, and the other end of the push-pull rod is provided with a push-pull rod reset spring mounting rod, and the push-pull rod reset spring mounting rod passes through the upper part of the wedge block mounting seat, and the push-pull rod reset spring is sleeved on the push-pull rod reset spring mounting rod. One end of the push-pull rod reset spring is against the wedge block mounting seat, and a push-pull rod reset spring adjustment nut for adjusting the compression degree of the push-pull rod reset spring is provided on the push-pull rod reset spring mounting rod at a position corresponding to the other end of the push-pull rod reset spring. The lower part of the wedge block mounting seat is hinged on the speed limiter seat, and the wire rope clamping wedge block is installed on the wedge block mounting seat at a position corresponding to the wire rope pulley groove of the rope wheel.

[0010] Furthermore, the ratchet wheel is coaxially arranged with the rope wheel, and the wire rope clamping wedge is movably mounted on the wedge mounting seat via a wedge rotating shaft. The wire rope clamping wedge is movably mounted on the wedge mounting seat via a wedge rotating shaft, which, on the one hand, facilitates the replacement of the wire rope clamping wedge, and on the other hand, after the wire rope clamping wedge is designed as a movable structure, the wire rope clamping wedge can automatically adjust the matching position with the wire rope, thereby being more conducive to the compression of the wire rope.

[0011] Furthermore, a ratchet limiting lever is provided on the speed limiter seat at a position corresponding to the ratchet side wall, and a ratchet limiting groove is provided on the ratchet side wall to match the ratchet limiting lever, and the ratchet limiting lever is located in the ratchet limiting groove. The additional ratchet limiting lever and ratchet limiting groove can limit the rotation of the ratchet, and at the same time, the ratchet limiting lever and ratchet limiting groove can cooperate with the push-pull rod reset spring to adjust the pressing force of the wire rope clamping wedge together, thereby adjusting the lifting force of the wire rope.

[0012] Further, the accidental movement trigger mechanism includes a ratchet striker, a striker bow, a trigger electromagnetic switch and a striker tension spring;

[0013] The middle part of the striker bow is rotatably mounted on the speed limiter seat, the pawl striker is mounted at a position on the upper end of the striker bow corresponding to the pawl, an arc-shaped triggering surface matching the pawl striker is provided on the side wall of the pawl, and a striker tension spring for making the pawl striker hit the arc-shaped triggering surface is provided between the upper end of the striker bow or the pawl striker and the speed limiter seat, and when the pawl striker hits the arc-shaped triggering surface, the pawl is driven to rotate, and the claw on the pawl can be engaged with the slot on the ratchet wheel;

[0014] The trigger electromagnetic switch is installed on the speed limiter seat at a position corresponding to the lower end of the striking bow, and the movable end of the trigger electromagnetic switch is hinged to the lower end of the striking bow.

[0015] Furthermore, a maintenance hook is movably installed on the speed limiter seat 1 at a position corresponding to the upper end of the striker, and a striker hook plate cooperating with the maintenance hook is provided on the upper end of the striker. During maintenance, the striker hook plate is first hooked by the maintenance hook to make the pawl striker away from the pawl. At this time, the pawl will be reset under the action of the claw reset spring, so that the pawl of the pawl will be disengaged from the slot on the ratchet. At the same time, the wire rope clamping wedge and the wedge mounting seat will also be reset under the elastic force of the push-pull rod reset spring to release the pressure on the wire rope, so that the rope wheel can rotate freely, which is convenient for later maintenance.

[0016] Furthermore, an overspeed trigger mechanism for triggering the action of the speed limiting mechanism is also provided on the side wall of the rope pulley;

[0017] The number of the pawls is two, and the two pawls are arranged on both sides of the center of the rope wheel, respectively. The overspeed trigger mechanism includes two balls, two ball-swinging mounting plates, a connecting rod and an elastic connecting rod. The middle parts of the two ball-swinging mounting plates are rotatably mounted on the side wall of the rope wheel at positions corresponding to the pawls. The end of the pawl opposite to the claw is provided with a pawl linkage rod. The pawl linkage rod is against the corresponding ball-swinging mounting plate through a pawl linkage adjusting screw. The two ball-swinging mounting plates are arranged in parallel. The two ends of the connecting rod are movably connected with one end of the two ball-swinging mounting plates, one end of the elastic connecting rod is mounted on the side wall of the rope wheel, and the other end of the elastic connecting rod is movably connected with the other end of one of the two ball-swinging mounting plates. The two balls are mounted on the two ball-swinging mounting plates. When the elevator car moves at an overspeed, the overspeed trigger mechanism will trigger the speed limiting mechanism to stop the rope wheel from rotating, thereby achieving the purpose of protecting passengers.

[0018] Furthermore, the elastic connecting rod comprises a connecting screw, a connecting rod spring, a connecting rod spring adjusting nut and a connecting rod mounting block, the connecting screw is movably inserted into the mounting portion on the side wall of the rope wheel, the connecting rod spring is sleeved on the screw portion of the connecting screw, the connecting rod spring adjusting nut is also sleeved on the screw portion of the connecting screw and presses the connecting rod spring onto the mounting portion on the side wall of the rope wheel, and the end of the screw portion of the connecting screw is movably mounted on the corresponding ball-swinging mounting plate through the connecting rod mounting block. By using an elastic connecting rod to replace one of the connecting rods in the traditional quadrilateral connecting rod mechanism, the volume of the quadrilateral connecting rod mechanism can be reduced, making the structure more compact and easier to install. At the same time, the connecting rod spring can also be used to adjust the action speed of the speed limiter.

[0019] Furthermore, an elevator safety circuit switch is installed on the speed limiter seat, and a switch striker is provided on the outer side wall of the swinging ball.

[0020] Furthermore, the speed limiter seat is assembled from a speed limiter seat body and a speed limiter seat vertical plate. By designing the speed limiter seat as a split structure, the installation and disassembly of various components are facilitated.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When the elevator car moves unexpectedly, the unexpected movement trigger mechanism will trigger the speed limit mechanism to stop the rotation of the rope wheel to protect the passengers;

[0023] 2. When the elevator's accidental movement detection subsystem detects that the elevator car has accidentally moved, the accidental movement detection subsystem disconnects the power supply of the trigger electromagnetic switch, and the active end of the trigger electromagnetic switch can move freely. At this time, the upper end of the striker bow will move toward the center of the ratchet wheel with the pawl striker under the elastic force of the striker tension spring until the pawl striker hits the arc-shaped triggering surface of the pawl. At the same time, as the rope wheel rotates, the pawl can be driven to rotate, and the claw on the pawl forms a card connection with the card slot on the ratchet wheel, so that the rope wheel will rotate with the ratchet wheel through the pawl, and the ratchet wheel will drive the push-pull rod to move, and the push-pull rod will touch the elevator safety circuit switch, disconnecting the elevator's safety circuit. At the same time, the push-pull rod drives the upper part of the wedge block mounting seat to flip toward the rope wheel through the push-pull rod reset spring, so that the wire rope clamping wedge on the wedge block mounting seat presses the wire rope into the wire rope wheel groove of the rope wheel, thereby stopping the rotation of the rope wheel, and pulling the safety clamp to prevent the elevator car from continuing to move;

[0024] 3. During maintenance, first hook the striker hook plate through the maintenance hook to keep the pawl striker away from the pawl, so that the rope wheel can rotate freely, which is convenient for maintenance;

[0025] 4. By designing the speed limiter seat into a split structure, it is convenient to install and disassemble various components. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the speed limiter in its initial state.

[0027] Figure 2 It is a schematic structural diagram of the situation when the elevator car moves unexpectedly and the pawl striker 4a hits the pawl 3b and causes it to be engaged with the engaging groove 3a1.

[0028] Figure 3 for Figure 2 A simplified schematic diagram of .

[0029] Figure 4 for Figure 2 When the state continues to move, the push-pull rod 3c touches the striker 6a on the elevator safety circuit switch 6.

[0030] Figure 5 for Figure 4 A simplified schematic diagram of .

[0031] Figure 6 for Figure 4 When the state continues to move, the wire rope clamping wedge 3f presses the wire rope a into the wire rope wheel groove 2a.

[0032] Figure 7 for Figure 6 A simplified schematic diagram of .

[0033] Figure 8 It is a structural schematic diagram when the rotation speed of the rope wheel 2 exceeds the first warning rotation speed and the switch striker 5e touches the elevator safety circuit switch 6.

[0034] Fig. 9 for Figure 8 A simplified schematic diagram of .

[0035] Fig.10 for Figure 8 When the rope wheel 2 continues to accelerate and reaches the second warning speed, the quadrilateral formed by two ball-swinging mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d is further deformed, so that the ball-swinging mounting plate 5b drives the pawl 3b to rotate through the pawl linkage adjusting screw 3b5 and the pawl linkage rod 3b4, and the claw 3b1 is connected with the slot 3a1.

[0036] Fig.11 for Fig.10 A simplified schematic diagram of .

[0037] Fig.12 for Fig.10 When the state continues to move, the wire rope clamping wedge 3f presses the wire rope a into the wire rope wheel groove 2a.

[0038] Fig.13 for Fig.12 A simplified schematic diagram of .

[0039] Fig.14 for Figure 1 Schematic diagram of the top view structure.

[0040] Fig.15 for Figure 1 Schematic diagram of the rear view structure.

[0041] Fig.16 It is a structural schematic diagram of the speed limiter seat body.

[0042] Fig.17 Schematic diagram of the structure of the rope pulley.

[0043] Fig.18 for Fig.17Schematic diagram of the side structure.

[0044] Fig.19 for Fig.17 Schematic diagram of the top view structure.

[0045] Fig. 20 Schematic diagram of the structure of the pawl.

[0046] Fig.21 for Fig. 20 Schematic diagram of the top view structure.

[0047] Fig. 22 It is a schematic diagram of the structure of the ball throwing.

[0048] Fig.23 for Fig. 22 Schematic diagram of the side structure.

[0049] Fig.24 for Fig. 22 Schematic diagram of the top view structure.

[0050] Fig.25 This is a schematic diagram of the structure of the ball-throwing mounting plate.

[0051] Fig.26 for Fig.25 Schematic diagram of the top view structure.

[0052] Fig. 27 It is a schematic diagram of the connecting rod structure.

[0053] As shown in the figure: speed limiter seat 1, speed limiter seat body 1a, speed limiter seat vertical plate 1b, rope wheel 2, wire rope wheel groove 2a, mounting part 2b, speed limit mechanism 3, ratchet 3a, slot 3a1, ratchet limit lever 3a2, ratchet limit slot 3a3, pawl 3b, pawl 3b1, pawl return spring 3b2, arc trigger surface 3b3, pawl linkage rod 3b4, pawl linkage adjustment screw 3b5, push-pull rod 3c, push-pull rod return spring installation rod 3c1, push-pull rod return spring adjustment nut 3c2, push-pull rod return spring 3 d, wedge block mounting seat 3e, wire rope clamping wedge block 3f, wedge block rotating shaft 3f1, accidental movement trigger mechanism 4, ratchet striker 4a, striker bow 4b, striker bow hook plate 4b1, trigger electromagnetic switch 4c, striker pin tension spring 4d, overspeed trigger mechanism 5, swing ball 5a, swing ball mounting plate 5b, connecting rod 5c, elastic connecting rod 5d, connecting screw 5d1, connecting rod spring 5d2, connecting rod spring adjusting nut 5d3, connecting rod mounting block 5d4, switch striker 5e, elevator safety circuit switch 6, striker rod 6a, maintenance hook 7, wire rope a. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] See also Figures 1 to 27 In an embodiment of the present invention, a speed governor with an anti-accidental movement function includes a speed governor seat 1 and a rope wheel 2, wherein the rope wheel 2 is rotatably installed in the speed governor seat 1, and the speed governor seat 1 is provided with a speed limiting mechanism 3 for preventing the rope wheel 2 from rotating due to the accidental movement of the elevator car, and the speed governor seat 1 is also provided with an accidental movement trigger mechanism 4 for triggering the action of the speed limiting mechanism 3. When the elevator car moves unexpectedly, the accidental movement trigger mechanism 4 will trigger the speed limiting mechanism 3 to act, thereby stopping the rope wheel 2 from rotating, thereby achieving the purpose of protecting passengers.

[0056] The speed limiting mechanism 3 comprises a ratchet 3a, a pawl 3b, a push-pull rod 3c, a push-pull rod reset spring 3d, a wedge block mounting seat 3e and a wire rope clamping wedge block 3f; the ratchet 3a can be rotatably mounted in the speed limiter seat 1, the pawl 3b can be rotatably mounted on the side wall of the rope wheel 2 at a position corresponding to the ratchet 3a, one end of the pawl 3b is a claw 3b1 that matches the slot 3a1 on the ratchet 3a, and a claw reset spring 3b2 for resetting the claw 3b1 is provided between the claw 3b1 and the rope wheel 2; one end of the push-pull rod 3c is hinged to the side wall of the ratchet 3a, and the other end of the push-pull rod 3c is provided with a push-pull rod reset spring mounting rod 3 c1, the push-pull rod reset spring mounting rod 3c1 passes through the upper part of the wedge block mounting seat 3e, the push-pull rod reset spring 3d is sleeved on the push-pull rod reset spring mounting rod 3c1, one end of the push-pull rod reset spring 3d is against the wedge block mounting seat 3e, and the push-pull rod reset spring mounting rod 3c1 is provided with a push-pull rod reset spring adjusting nut 3c2 for adjusting the compression degree of the push-pull rod reset spring 3d at a position corresponding to the other end of the push-pull rod reset spring 3d. The lower part of the wedge block mounting seat 3e is hinged on the speed limiter seat 1, and the wire rope clamping wedge block 3f is installed on the wedge block mounting seat 3e at a position corresponding to the wire rope wheel groove 2a of the rope wheel 2.

[0057] The ratchet 3a is coaxially arranged with the rope wheel 2, and the wire rope clamping wedge 3f is movably mounted on the wedge mounting seat 3e through the wedge rotating shaft 3f1. The wire rope clamping wedge 3f is movably mounted on the wedge mounting seat 3e through the wedge rotating shaft 3f1, which facilitates the replacement of the wire rope clamping wedge 3f on the one hand, and on the other hand, after the wire rope clamping wedge 3f is designed as a movable structure, the wire rope clamping wedge 3f can automatically adjust the matching position with the wire rope a, which is more conducive to the compression of the wire rope a. A ratchet limit lever 3a2 is provided on the speed limiter seat 1 at a position corresponding to the side wall of the ratchet 3a, and a ratchet limit groove 3a3 matching the ratchet limit lever 3a2 is provided on the side wall of the ratchet 3a, and the ratchet limit lever 3a2 is located in the ratchet limit groove 3a3. The additional ratchet limit lever 3a2 and ratchet limit groove 3a3 can limit the rotation of the ratchet 3a. At the same time, the ratchet limit lever 3a2 and the ratchet limit groove 3a3 can also cooperate with the push-pull rod reset spring 3d to adjust the clamping force of the wire rope clamping block 3f, thereby adjusting the pulling force of the wire rope.

[0058] The above-mentioned accidental movement trigger mechanism 4 includes a ratchet striker 4a, a striker bow 4b, a trigger electromagnetic switch 4c and a striker tension spring 4d; the middle part of the striker bow 4b can be rotatably installed on the speed limiter seat 1, the ratchet striker 4a is installed at the position of the upper end of the striker bow 4b corresponding to the ratchet 3b, and the side wall of the ratchet 3b is provided with an arc-shaped triggering surface 3b3 that matches the ratchet striker 4a, and the upper end of the striker bow 4b or between the ratchet striker 4a and the speed limiter seat 1 is provided with a trigger for making the ratchet striker 4a hit the The striker tension spring 4d is in the state of the arc-shaped trigger surface 3b3. When the pawl striker 4a hits the arc-shaped trigger surface 3b3, it will drive the pawl 3b to rotate, and make the claw 3b1 on the pawl 3b engage with the slot 3a1 on the ratchet 3a; the trigger electromagnetic switch 4c is installed on the speed limiter seat 1 at a position corresponding to the lower end of the striker bow 4b, and the movable end of the trigger electromagnetic switch 4c is hinged to the lower end of the striker bow 4b, and the trigger electromagnetic switch 4c is electrically connected to the circuit of the accidental movement detection subsystem of the elevator.

[0059] In the initial state, the trigger electromagnetic switch 4c is in the energized and attracted state, the pawl 3b is not engaged with the ratchet 3a, and the rope wheel 2 can rotate freely; when the elevator's accidental movement detection subsystem detects that the elevator car has accidentally moved, the accidental movement detection subsystem disconnects the power supply of the trigger electromagnetic switch 4c, and the movable end of the trigger electromagnetic switch 4c can move freely. At this time, the upper end of the striker bow 4b will move toward the center of the ratchet wheel 3a with the pawl striker 4a under the elastic force of the striker tension spring 4d, until the pawl striker 4a hits the arc-shaped triggering surface 3b3 of the pawl 3b, and at the same time, the pawl 3b can be driven to rotate as the rope wheel 2 rotates. The claw 3b1 on the pawl 3b is engaged with the slot 3a1 on the ratchet 3a, so that the rope pulley 2 will rotate with the ratchet 3a through the pawl 3b, and the ratchet 3a will drive the push-pull rod 3c to move, and the push-pull rod 3c will touch the elevator safety circuit switch 6, so that the elevator safety circuit is disconnected. At the same time, the push-pull rod 3c drives the upper part of the wedge block mounting seat 3e to flip toward the rope pulley 2 through the push-pull rod reset spring 3d, so that the wire rope clamping wedge 3f on the wedge block mounting seat 3e presses the wire rope a into the wire rope wheel groove 2a of the rope pulley 2, thereby stopping the rotation of the rope pulley 2 and pulling the safety clamp to prevent the elevator car from continuing to move.

[0060] A maintenance hook 7 is movably installed on the speed limiter seat 1 at a position corresponding to the upper end of the striker 4b, and a striker hook plate 4b1 is provided on the upper end of the striker 4b to cooperate with the maintenance hook 7. During maintenance, the striker hook plate 4b1 is first hooked by the maintenance hook 7 to make the pawl striker 4a away from the pawl 3b. At this time, the pawl 3b will be reset under the action of the claw reset spring 3b2, so that the claw 3b1 of the pawl 3b will be disengaged from the slot 3a1 on the ratchet wheel 3a. At the same time, the wire rope clamping wedge 3f and the wedge mounting seat 3e will also be reset under the elastic force of the push-pull rod reset spring 3d to release the pressure on the wire rope, so that the rope wheel 2 can rotate freely, which is convenient for later maintenance.

[0061] An overspeed trigger mechanism 5 for triggering the action of the speed limiting mechanism 3 is also provided on the side wall of the above-mentioned rope wheel 2; the number of the ratchet 3b is two, and the two ratchet pawls 3b are respectively arranged on both sides of the center of the rope wheel 2, and the overspeed trigger mechanism 5 includes two balls 5a, two ball-throwing mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d, and the middle parts of the two ball-throwing mounting plates 5b are rotatably mounted on the side wall of the rope wheel 2 corresponding to the positions of the ratchet 3b, and a ratchet linkage rod 3b4 is provided on the end of the ratchet 3b opposite to the clamping claw 3b1, and the ratchet linkage rod 3b4 is against the corresponding ball-throwing mounting plate 5b through a ratchet linkage adjusting screw 3b5, and the ratchet linkage adjusting screw is adjusted by rotating the ratchet linkage adjusting screw. The position of the rod 3b5 can adjust the relative position between the ratchet linkage rod 3b4 and the ball-swinging mounting plate 5b, and then adjust the initial relative position between the claw 3b1 and the slot 3a1, so that the speed of the rope wheel 2 required when the overspeed trigger mechanism 5 triggers the speed limit mechanism 3 to be activated can be adjusted, so that the second warning speed can be set. The two ball-swinging mounting plates 5b are arranged in parallel, and the two ends of the connecting rod 5c are respectively movably connected with one end of the two ball-swinging mounting plates 5b, and one end of the elastic connecting rod 5d is installed on the side wall of the rope wheel 2, and the other end of the elastic connecting rod 5d is movably connected with the other end of one of the two ball-swinging mounting plates 5b, and the two balls 5a are respectively installed on the two ball-swinging mounting plates 5b. When the elevator car moves at an overspeed, the overspeed trigger mechanism 5 will trigger the speed limit mechanism 3 to act, thereby stopping the rope wheel 2 from rotating, thereby achieving the purpose of protecting passengers.

[0062] The elastic connecting rod 5d comprises a connecting screw 5d1, a connecting rod spring 5d2, a connecting rod spring adjusting nut 5d3 and a connecting rod mounting block 5d4, wherein the connecting screw 5d1 is movably inserted into the mounting portion 2b on the side wall of the rope wheel 2, the connecting rod spring 5d2 is sleeved on the screw portion of the connecting screw 5d1, the connecting rod spring adjusting nut 5d3 is also sleeved on the screw portion of the connecting screw 5d1 and presses the connecting rod spring 5d2 onto the mounting portion 2b on the side wall of the rope wheel 2, and the end of the screw portion of the connecting screw 5d1 is movably mounted on the corresponding ball-swinging mounting plate 5b through the connecting rod mounting block 5d4. By adopting the elastic connecting rod 5d to replace one connecting rod in the traditional quadrilateral connecting rod mechanism, the volume of the quadrilateral connecting rod mechanism can be reduced, making the present structure more compact and more convenient to install, and at the same time, the connecting rod spring 5d can also be used to adjust the action speed of the speed limiter. The speed limiter seat 1 is provided with an elevator safety circuit switch 6, which is connected in series to the elevator safety circuit, and a switch striker 5e is provided on the outer wall of the swing ball 5a. The elevator safety circuit switch 6 is provided with a striker 6a, which is convenient for the push-pull rod 3c to touch.

[0063] When the rotation speed of the rope pulley 2 is within the normal rotation speed range, the switch striker 5e on the outer wall of the swing ball 5a will not touch the elevator safety circuit switch 6. When the rotation speed of the rope pulley 2 exceeds the first warning rotation speed (the first warning rotation speed can be adjusted according to the installation position of the switch striker 5e on the swing ball 5a), due to the action of centrifugal force, the swing ball 5a will drive the quadrilateral composed of two ball-swinging mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d to deform, so that the switch striker 5e on the outer wall of the swing ball 5a moves away from the center of the rope pulley 2 until it touches the elevator safety circuit switch 6, thereby disconnecting the elevator safety circuit; if the rope pulley 2 continues to accelerate and reaches the second warning rotation speed, then under the action of centrifugal force, the swing ball 5a will drive the quadrilateral composed of two ball-swinging mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d to deform. The quadrilateral formed by the plate 5b, a connecting rod 5c and an elastic connecting rod 5d is further deformed, so that the ball-swinging mounting plate 5b drives the pawl 3b to rotate through the pawl linkage adjusting screw 3b5 and the pawl linkage rod 3b4, and the claw 3b1 on the pawl 3b is engaged with the slot 3a1 on the ratchet 3a, so that the rope pulley 2 will rotate together with the ratchet 3a through the pawl 3b, and the ratchet 3a will drive the push-pull rod 3c to move, and the push-pull rod 3c drives the upper part of the wedge block mounting seat 3e to flip toward the rope pulley 2 through the push-pull rod reset spring 3d, so that the wire rope clamping wedge 3f on the wedge block mounting seat 3e presses the wire rope a into the wire rope wheel groove 2a of the rope pulley 2, thereby stopping the rotation of the rope pulley 2, and pulling the safety clamp to prevent the elevator car from continuing to move.

[0064] The speed limiter seat 1 is assembled from a speed limiter seat body 1a and a speed limiter seat vertical plate 1b. By designing the speed limiter seat 1 as a split structure, the installation and disassembly of various components are facilitated.

[0065] The working principle of this speed limiter is as follows:

[0066] In the initial state, the trigger electromagnetic switch 4c is in the energized and attracted state, the pawl 3b is not engaged with the ratchet 3a, the rope wheel 2 can rotate freely, and at the same time, the elevator safety circuit switch 6 is also in the closed state.

[0067] When the unexpected movement detection subsystem of the elevator detects that the elevator car has unexpectedly moved, the unexpected movement detection subsystem disconnects the power supply of the trigger electromagnetic switch 4c, and the movable end of the trigger electromagnetic switch 4c can move freely. At this time, the upper end of the striker bow 4b will move toward the center of the ratchet 3a with the pawl striker 4a under the elastic force of the striker tension spring 4d, until the pawl striker 4a hits the arc-shaped triggering surface 3b3 of the pawl 3b. At the same time, as the rope wheel 2 rotates, the pawl 3b can be driven to rotate, and the claw 3b1 on the pawl 3b is aligned with the groove 3a1 on the ratchet 3a. The pawl 3b and the ratchet 3a are connected, so that the rope wheel 2 will rotate together with the ratchet 3a, and the ratchet 3a will drive the push-pull rod 3c to move, and the push-pull rod 3c will touch the impact rod 6a on the elevator safety circuit switch 6, so that the elevator safety circuit is disconnected. At the same time, the push-pull rod 3c drives the upper part of the wedge block mounting seat 3e to flip toward the rope wheel 2 through the push-pull rod reset spring 3d, so that the wire rope clamping wedge 3f on the wedge block mounting seat 3e presses the wire rope a into the wire rope wheel groove 2a of the rope wheel 2, thereby stopping the rotation of the rope wheel 2 and pulling the safety clamp to prevent the elevator car from moving further.

[0068] When the rotation speed of the rope wheel 2 is within the normal rotation speed range, the switch striker 5e on the outer side wall of the swing ball 5a will not touch the elevator safety circuit switch 6.

[0069] When the rotation speed of the rope pulley 2 exceeds the first warning rotation speed, due to the action of centrifugal force, the swing ball 5a will drive the quadrilateral formed by two ball-swinging mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d to deform, so that the switch striker 5e on the outer wall of the swing ball 5a moves away from the center of the rope pulley 2 until it touches the elevator safety circuit switch 6, disconnecting the elevator safety circuit; if the rope pulley 2 continues to accelerate and reaches the second warning rotation speed, then under the action of centrifugal force, the swing ball 5a will drive the quadrilateral formed by two ball-swinging mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d to further deform, so that the ball-swinging mounting plates 5b drives the pawl 3b to rotate through the pawl linkage adjusting screw 3b5 and the pawl linkage rod 3b4, and makes the claw 3b1 on the pawl 3b form a clamping connection with the slot 3a1 on the ratchet 3a, so that the rope wheel 2 will rotate together with the ratchet 3a through the pawl 3b, and the ratchet 3a will drive the push-pull rod 3c to move, and the push-pull rod 3c will drive the upper part of the wedge block mounting seat 3e to flip toward the rope wheel 2 through the push-pull rod reset spring 3d, so that the wire rope clamping wedge 3f on the wedge block mounting seat 3e presses the wire rope a into the wire rope wheel groove 2a of the rope wheel 2, thereby stopping the rotation of the rope wheel 2, and pulling the safety clamp to prevent the elevator car from continuing to move.

[0070] During maintenance, first hook the striker hook plate 4b1 through the maintenance hook 7 to make the pawl striker 4a away from the pawl 3b. At this time, the pawl 3b will be reset under the action of the pawl reset spring 3b2, so that the pawl 3b1 of the pawl 3b will be disengaged from the slot 3a1 on the ratchet 3a. At the same time, the wire rope clamping wedge 3f and the wedge mounting seat 3e will also be reset under the elastic force of the push-pull rod reset spring 3d to release the pressure on the wire rope, so that the pulley 2 can rotate freely, which is convenient for later maintenance.

[0071] When the elevator car moves unexpectedly, the accidental movement trigger mechanism 4 will trigger the speed limiting mechanism 3 to operate, thereby stopping the rotation of the rope wheel 2 to protect the passengers; the wire rope clamping wedge 3f is movably installed on the wedge mounting seat 3e through the wedge rotating shaft 3f1, which facilitates the replacement of the wire rope clamping wedge 3f on the one hand, and on the other hand, after the wire rope clamping wedge 3f is designed as a movable structure, the wire rope clamping wedge 3f can automatically adjust the matching position with the wire rope a, which is more conducive to the tightening of the wire rope a; the added ratchet limit lever 3a2 and ratchet limit groove 3a3 can limit the rotation of the ratchet 3a; when the elevator's accidental movement detection subsystem detects that the elevator car has moved unexpectedly, the accidental movement detection subsystem disconnects the power supply of the trigger electromagnetic switch 4c, and the movable end of the trigger electromagnetic switch 4c can move freely. At this time, the upper end of the collision bow 4b Under the elastic force of the striker tension spring 4d, the pawl striker 4a will move toward the center of the ratchet 3a with the pawl striker 4a until the pawl striker 4a hits the arc-shaped triggering surface 3b3 of the pawl 3b. At the same time, as the rope sheave 2 rotates, the pawl 3b can be driven to rotate, and the claw 3b1 on the pawl 3b is engaged with the slot 3a1 on the ratchet 3a. In this way, the rope sheave 2 will rotate with the ratchet 3a through the pawl 3b, and the ratchet 3a will drive the push-pull rod 3c to move, and the push-pull rod 3c will touch the elevator safety circuit switch 6 to disconnect the elevator safety circuit. At the same time, the push-pull rod 3c drives the upper part of the wedge block mounting seat 3e to flip toward the rope sheave 2 through the push-pull rod reset spring 3d, so that the wire rope clamping wedge 3f on the wedge block mounting seat 3e presses the wire rope a into the wire rope sheave groove 2a of the rope sheave 2, thereby stopping the rotation of the rope sheave 2 and pulling the safety clamp to prevent the elevator car from continuing to move.

[0072] At the same time, when the speed limiter is inspected, the bow hook plate 4b1 is first hooked by the inspection hook 7 to make the pawl striker 4a away from the pawl 3b. At this time, the pawl 3b will be reset under the action of the pawl reset spring 3b2, so that the pawl 3b1 of the pawl 3b will be disengaged from the slot 3a1 on the ratchet wheel 3a. At the same time, the wire rope clamping wedge 3f and the wedge mounting seat 3e will also be reset under the elastic force of the push-pull rod reset spring 3d to release the pressure on the wire rope, so that the rope wheel 2 can rotate freely, which is convenient for later maintenance.

[0073] Moreover, when the elevator car moves at an excessive speed, the overspeed trigger mechanism 5 will trigger the speed limiting mechanism 3 to operate, thereby stopping the rotation of the rope pulley 2 and achieving the purpose of protecting the passengers; by adopting an elastic connecting rod 5d to replace one of the connecting rods in the traditional quadrilateral connecting rod mechanism, the volume of the quadrilateral connecting rod mechanism can be reduced, making the structure more compact and easier to install; when the rotation speed of the rope pulley 2 exceeds the first warning rotation speed, due to the action of centrifugal force, the swinging ball 5a will drive the quadrilateral composed of two ball-swinging mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d to deform, thereby causing the switch striker 5e on the outer wall of the swinging ball 5a to move away from the center of the rope pulley 2 until it touches the elevator safety circuit switch 6, thereby disconnecting the elevator safety circuit; if the rope pulley 2 continues to accelerate and reaches the second warning rotation speed, then under the action of centrifugal force Under the condition that the ball 5a is in motion, the quadrilateral formed by two ball-swinging mounting plates 5b, a connecting rod 5c and an elastic connecting rod 5d is further deformed, so that the ball-swinging mounting plate 5b drives the pawl 3b to rotate through the pawl linkage adjusting screw 3b5 and the pawl linkage rod 3b4, and the claw 3b1 on the pawl 3b is connected with the groove 3a1 on the ratchet 3a, so that the rope wheel 2 can rotate with the ratchet 3a through the pawl 3b, and the ratchet 3a can drive the push-pull rod 3c to move, and the push-pull rod 3c drives the upper part of the wedge block mounting seat 3e to flip toward the rope wheel 2 through the push-pull rod reset spring 3d, so that the wire rope clamping wedge 3f on the wedge block mounting seat 3e presses the wire rope a into the wire rope wheel groove 2a of the rope wheel 2, thereby stopping the rotation of the rope wheel 2, and pulling the safety clamp to prevent the elevator car from continuing to move;

[0074] Finally, the speed limiter is designed with the speed limiter seat 1 as a split structure, which facilitates the installation and disassembly of various components.

[0075] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention, and the contents not described in detail in this specification shall belong to the prior art known to professional and technical personnel in the field.

Claims

1. A speed governor with an anti-accidental movement function, comprising a speed governor seat (1) and a rope pulley (2), wherein the rope pulley (2) is rotatably mounted in the speed governor seat (1), characterized in that: The speed limiter seat (1) is provided with a speed limiting mechanism (3) for preventing the rope wheel (2) from rotating due to accidental movement of the elevator car, and the speed limiter seat (1) is also provided with an accidental movement triggering mechanism (4) for triggering the action of the speed limiting mechanism (3); The speed limiting mechanism (3) comprises a ratchet (3a), a pawl (3b), a push-pull rod (3c), a push-pull rod return spring (3d), a wedge mounting seat (3e) and a wire rope clamping wedge (3f); The ratchet (3a) is rotatably mounted in the speed limiter seat (1); the pawl (3b) is rotatably mounted on the side wall of the rope wheel (2) at a position corresponding to the ratchet (3a); one end of the pawl (3b) is a claw (3b1) that matches with a slot (3a1) on the ratchet (3a); a claw reset spring (3b2) for resetting the claw (3b1) is provided between the claw (3b1) and the rope wheel (2); One end of the push-pull rod (3c) is hinged to the side wall of the ratchet (3a), and the other end of the push-pull rod (3c) is provided with a push-pull rod reset spring mounting rod (3c1). The push-pull rod reset spring mounting rod (3c1) passes through the upper part of the wedge block mounting seat (3e). The push-pull rod reset spring (3d) is sleeved on the push-pull rod reset spring mounting rod (3c1). One end of the push-pull rod reset spring (3d) abuts against the wedge block mounting seat (3e). A push-pull rod reset spring adjusting nut (3c2) for adjusting the compression degree of the push-pull rod reset spring (3d) is provided at the position of the other end of the push-pull rod reset spring (3d); the lower part of the wedge block mounting seat (3e) is hinged on the speed limiter seat (1); the wire rope clamping wedge block (3f) is installed on the wedge block mounting seat (3e) at a position corresponding to the wire rope wheel groove (2a) of the rope wheel (2); the speed limiter seat (1) is assembled from a speed limiter seat body (1a) and a speed limiter seat vertical plate (1b).

2. A speed limiter with an anti-accidental movement function according to claim 1, characterized in that: The ratchet wheel (3a) is coaxially arranged with the rope wheel (2), and the wire rope clamping wedge block (3f) is movably mounted on the wedge block mounting seat (3e) via a wedge block rotating shaft (3f1).

3. A speed limiter with an anti-accidental movement function according to claim 1, characterized in that: A ratchet limiting lever (3a2) is provided on the speed limiter seat (1) at a position corresponding to the side wall of the ratchet (3a), a ratchet limiting groove (3a3) matching with the ratchet limiting lever (3a2) is provided on the side wall of the ratchet (3a), and the ratchet limiting lever (3a2) is located in the ratchet limiting groove (3a3).

4. A speed limiter with an anti-accidental movement function according to claim 1, characterized in that: The accidental movement trigger mechanism (4) comprises a ratchet striker (4a), a striker bow (4b), a trigger electromagnetic switch (4c) and a striker tension spring (4d); The middle part of the striking bow (4b) is rotatably mounted on the speed limiter seat (1); the ratchet striker (4a) is mounted at a position on the upper end of the striking bow (4b) corresponding to the ratchet (3b); a side wall of the ratchet (3b) is provided with an arc-shaped triggering surface (3b3) matching with the ratchet striker (4a); a striker tension spring (4d) is provided between the upper end of the striking bow (4b) or the ratchet striker (4a) and the speed limiter seat (1) for placing the ratchet striker (4a) in a state of striking the arc-shaped triggering surface (3b3); when the ratchet striker (4a) strikes the arc-shaped triggering surface (3b3), the ratchet (3b) is driven to rotate, and the claw (3b1) on the ratchet (3b) can be engaged with the slot (3a1) on the ratchet wheel (3a); The trigger electromagnetic switch (4c) is mounted on the speed limiter seat (1) at a position corresponding to the lower end of the striking bow (4b), and the movable end of the trigger electromagnetic switch (4c) is hinged to the lower end of the striking bow (4b).

5. A speed limiter with an anti-accidental movement function according to claim 4, characterized in that: A maintenance hook (7) is movably mounted on the speed limiter seat (1) at a position corresponding to the upper end of the striker bow (4b), and a striker bow hook plate (4b1) matching the maintenance hook (7) is provided at the upper end of the striker bow (4b).

6. A speed limiter with an anti-accidental movement function according to claim 1, characterized in that: An overspeed trigger mechanism (5) for triggering the speed limiting mechanism (3) to operate is also provided on the side wall of the rope wheel (2); The number of the ratchet pawls (3b) is two, and the two ratchet pawls (3b) are respectively arranged on both sides of the center of the rope wheel (2); the overspeed trigger mechanism (5) comprises two swinging balls (5a), two swinging ball mounting plates (5b), a connecting rod (5c) and an elastic connecting rod (5d); the middle parts of the two swinging ball mounting plates (5b) are respectively rotatably mounted on the side wall of the rope wheel (2) at positions corresponding to the ratchet pawls (3b); a ratchet linkage rod (3b4) is provided at one end of the ratchet pawl (3b1) opposite to the clamping claw (3b1); the ratchet linkage rod (3b4) is The rod (3b4) is abutted against the corresponding ball-swinging mounting plate (5b) through a ratchet linkage adjusting screw (3b5); the two ball-swinging mounting plates (5b) are arranged in parallel; the two ends of the connecting rod (5c) are movably connected to one end of the two ball-swinging mounting plates (5b), one end of the elastic connecting rod (5d) is mounted on the side wall of the rope pulley (2), the other end of the elastic connecting rod (5d) is movably connected to the other end of one of the two ball-swinging mounting plates (5b), and the two balls (5a) are respectively mounted on the two ball-swinging mounting plates (5b).

7. A speed limiter with an anti-accidental movement function according to claim 6, characterized in that: The elastic connecting rod (5d) comprises a connecting screw (5d1), a connecting rod spring (5d2), a connecting rod spring adjusting nut (5d3) and a connecting rod mounting block (5d4); the connecting screw (5d1) is movably inserted into the mounting portion (2b) on the side wall of the rope wheel (2); the connecting rod spring (5d2) is sleeved on the screw portion of the connecting screw (5d1); the connecting rod spring adjusting nut (5d3) is also sleeved on the screw portion of the connecting screw (5d1) and presses the connecting rod spring (5d2) onto the mounting portion on the side wall of the rope wheel (2); the end of the screw portion of the connecting screw (5d1) is movably mounted on the corresponding ball-swinging mounting plate (5b) through the connecting rod mounting block (5d4).

8. A speed limiter with an anti-accidental movement function according to claim 6, characterized in that: An elevator safety circuit switch (6) is installed on the speed limiter seat (1), and a switch striker (5e) is provided on the outer side wall of the swinging ball (5a).

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