A high-reliability elevator speed limiter

Abstract

The present invention discloses a high-reliability elevator speed limiter, which relates to the technical field of elevator safety devices. The high-reliability elevator speed limiter comprises: a frame, which is used to provide a slewing support for the rope wheel, the rotating shaft of the rope wheel is slewingly supported on the frame, and the frame extends a plurality of speed-limiting teeth toward the rotating shaft; it also comprises: a limit block, which is arranged on the rotating shaft and rotates synchronously with the rope wheel; a speed-limiting claw, which is slidably connected to the limit block, slides along the limit block and is embedded between adjacent speed-limiting teeth to organize the rotation of the rotating shaft; a speed measuring component, which is used to determine the rotation speed of the rope wheel, and when the rotation speed of the rope wheel exceeds the preset speed, the speed-limiting component is controlled to push the speed-limiting claw to extend toward the speed-limiting tooth. This solution can react faster when the elevator is overspeeding and stop the elevator in time.

Description

Technical Field

[0001] The invention relates to the technical field of elevator safety devices, and in particular to a high-reliability elevator speed limiter. Background Art

[0002] The safe operation of the elevator is inseparable from the protection of the installation device. The existing elevator safety devices include the elevator speed limiter. When the elevator is running, the wire rope that lifts the elevator passenger car moves synchronously with the passenger car. The wire rope is wound on the sheave, and the sheave is fixed at the top of the passenger car's movement path, that is, the top of the building is equipped with a bracket for rotating the sheave. The passenger car is designed with a certain speed range. When the passenger car exceeds the speed, the safety factor of the elevator is reduced. Therefore, the speed limiter is used to stop the elevator in time when the elevator exceeds the speed to ensure the safety of the passengers in the passenger car. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the passenger compartment is designed with a certain speed range. When the passenger compartment exceeds the speed limit, the safety factor of the elevator is reduced. Therefore, the speed limiter is used to stop the elevator in time when the elevator exceeds the speed limit to ensure the safety of the passengers in the passenger compartment.

[0004] In order to solve the above technical problems, the present invention provides a high-reliability elevator speed limiter, comprising:

[0005] A frame, used to provide a slewing support for the rope wheel, the rotating shaft of the rope wheel is slewingly supported on the frame, and the frame has a plurality of speed-limiting teeth extending toward the rotating shaft;

[0006] Also includes:

[0007] A limit block, arranged on the rotating shaft and rotating synchronously with the rope wheel;

[0008] A speed limiting claw is slidably connected to the limit block, and is slidably embedded along the limit block and embedded between adjacent speed limiting teeth to prevent the rotation of the shaft;

[0009] The speed measuring component is used to determine the rotation speed of the rope wheel. When the rotation speed of the rope wheel exceeds a preset speed, the speed limiting component is controlled to push the speed limiting claw toward the speed limiting tooth.

[0010] The technical solution further defined in the present invention is: there are at least two limit blocks, a speed limiting channel for the speed limiting claw to slide is formed between the two limit blocks, one end of the speed limiting channel is open, and the opening faces the speed limiting tooth, and the speed limiting component is arranged in the speed limiting channel away from the bottom end of the opening.

[0011] Furthermore, the speed measurement component includes:

[0012] A stop plate is rotatably connected to the limit block, a torsion spring is provided at the connection between the stop plate and the limit block, the stop plate is located between the speed limiting claw and the speed limiting member, and the speed limiting member rotates with the rope wheel and is controlled by the centrifugal force to have a movement tendency to push the stop plate to open;

[0013] A travel switch is arranged on the opening path of the stop plate, and when the speed limiting member is separated from the stop plate and moves toward the speed limiting claw, the travel switch is triggered by the stop plate;

[0014] The lifting device is arranged at the bottom of the speed limiting channel and is controlled by the travel switch to push the speed limiting claw to extend.

[0015] The aforementioned high-reliability elevator speed limiter, the lifting device comprises:

[0016] The safety airbag is inflated under the control of the travel switch and extends along the speed limiting channel, and pushes out the speed limiting claw.

[0017] In the aforementioned high-reliability elevator speed limiter, a base is provided at the bottom of the speed limiting channel, an airbag placement groove for installing the safety airbag is provided in the base, and the speed limiting component is arranged on the opening of the airbag placement groove.

[0018] In the aforementioned high-reliability elevator speed limiter, an elastic support member is supported between the base and the speed limiter, and the elastic support member and the torsion spring at the rotating end of the stop plate are both in an elastic deformation state.

[0019] In the aforementioned high-reliability elevator speed limiter, the elastic support member is a conical spring.

[0020] The aforementioned high-reliability elevator speed limiter has a limiting protrusion extending from the speed limiting claw, the limiting block is provided with a limiting slide groove for cooperating with the limiting protrusion, the bottom of the limiting slide groove is provided with an electromagnet controlled by the travel switch, and the limiting protrusion is made of a material that can be adsorbed by the electromagnet when electricity is turned on.

[0021] The aforementioned high-reliability elevator speed limiter has two limiting protrusions, and the speed limiting claw is supported between the two limiting protrusions so that a certain gap is left between the speed limiting claw and the limiting block.

[0022] The aforementioned high-reliability elevator speed limiter has a plurality of speed limiting claws which are evenly distributed on the rotating shaft in a circular shape, and a plurality of speed measuring components and limit blocks which are respectively adapted to different speed limiting claws.

[0023] The beneficial effects of the present invention are:

[0024] (1) In the present invention, the speed limiter has a certain gravity and has centrifugal force when rotating with the rope wheel. Within the set speed range, the centrifugal force on the speed limiter is not enough to break through the obstruction of the stop plate. When the speed limiter breaks through the brake member during overspeeding, due to the loss of the obstruction of the stop plate, the elastic support member first pops out the span of the speed limiter, and at the same time, the stop plate triggers the travel switch, causing the airbag to pop out and again support the speed limiter to push the speed limit claw out of the speed limit channel between the limit blocks. The speed limit claw and the speed limit tooth conflict with each other to prevent the shaft from continuing to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional diagram of the structure of the present invention;

[0026] Figure 2 A front view showing the structure of the present invention;

[0027] Figure 3 A front view showing the structure of the speed measuring assembly;

[0028] Figure 4 for Figure 2 The AA section view is shown in the middle;

[0029] Figure 5 for Figure 4 A magnified view of the mid-section view;

[0030] Figure 6 It is a cross-sectional view showing the coordination structure between the speed limiting claw and the limit block.

[0031] Among them: 1. frame; 11. speed limiting tooth; 2. rope pulley; 21. rotating shaft; 3. speed limiting claw; 31. limiting protrusion; 4. limiting block; 41. limiting slide groove; 42. electromagnet; 43. stop plate; 44. travel switch; 5. speed limiting part; 51. elastic support part; 52. base; 521. airbag placement device. DETAILED DESCRIPTION

[0032] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0033] Embodiment 1:

[0034] This embodiment provides a high-reliability elevator speed limiter, the structure of which is shown in the figure.

[0035] The high-reliability elevator speed governor comprises:

[0036] The frame 1 is used to provide a slewing support for the rope wheel 2. The rotating shaft 21 of the rope wheel 2 is slewingly supported on the frame 1. The frame 1 has a plurality of speed limiting teeth 11 extending toward the rotating shaft 21.

[0037] Also includes:

[0038] The limit block 4 is arranged on the rotating shaft 21 and rotates synchronously with the rope wheel 2;

[0039] The speed limiting claw 3 is slidably connected to the limit block 4, and is slidably embedded between adjacent speed limiting teeth 11 along the limit block 4 to prevent the rotation of the rotating shaft 21;

[0040] The speed measuring component is used to determine the rotation speed of the rope wheel 2. When the rotation speed of the rope wheel 2 exceeds the preset speed, the speed limiting component 5 is controlled to push the speed limiting claw 3 to extend toward the speed limiting tooth 11.

[0041] There are at least two limit blocks 4, and a speed limiting channel is formed between the two limit blocks 4 for the speed limiting claw 3 to slide. One end of the speed limiting channel is open, and the opening faces the speed limiting tooth 11. The speed limiting member 5 is arranged at the bottom end of the speed limiting channel away from the opening.

[0042] The speed measurement components include:

[0043] The stop plate 43 is rotatably connected to the limit block 4. A torsion spring is provided at the connection between the stop plate 43 and the limit block 4. The stop plate 43 is located between the speed limiting claw 3 and the speed limiting member 5. The speed limiting member 5 rotates with the rope wheel 2 and is controlled by the centrifugal force to have a movement tendency to push the stop plate 43 to open.

[0044] The travel switch 44 is arranged on the opening path of the stop plate 43. When the speed limiting member 5 is separated from the stop plate 43 and moves toward the speed limiting claw 3, the travel switch 44 is triggered by the stop plate 43;

[0045] The lifting device is arranged at the bottom of the speed limiting channel and is controlled by the travel switch 44 to push the speed limiting claw 3 to extend.

[0046] The lifting device includes:

[0047] The airbag is inflated and extended along the speed limiting passage under the control of the travel switch 44, and pushes out the speed limiting claw 3.

[0048] A base 52 is provided at the bottom of the speed limiting channel, an airbag placement groove for installing a safety airbag is provided in the base 52, and the speed limiting member 5 is provided on the opening of the airbag placement groove.

[0049] An elastic support member 51 is supported between the base 52 and the speed limiter 5 , and the elastic support member 51 and the torsion spring at the rotating end of the stop plate 43 are both in an elastically deformed state.

[0050] The elastic support member 51 is a conical spring.

[0051] A limiting protrusion 31 extends from the speed limiting claw 3, and a limiting groove 41 for cooperating with the limiting protrusion 31 is provided on the limiting block 4. An electromagnet 42 controlled by a travel switch 44 is provided at the bottom of the limiting groove 41, and the limiting protrusion 31 is made of a material that can be electrically adsorbed by the electromagnet 42.

[0052] There are two limiting protrusions 31 , and the speed limiting claw 3 is supported between the two limiting protrusions 31 so that a certain gap is left between the speed limiting claw 3 and the limiting block 4 .

[0053] There are multiple speed limiting claws 3 which are evenly distributed on the rotating shaft 21 in a circular shape. There are multiple speed measuring components and limit blocks 4 which are respectively adapted to different speed limiting claws 3 .

[0054] The speed limiter 5 has a certain gravity and has centrifugal force when rotating with the rope wheel 2. Within the set speed range, the centrifugal force on the speed limiter 5 is not enough to break through the obstruction of the stop plate 43. When overspeeding, after the speed limiter 5 breaks through the brake, due to the loss of the obstruction of the stop plate 43, the elastic support member 51 first pops out the speed limiter 5, and at the same time, the stop plate 43 triggers the travel switch 44, so that the airbag pops out and pushes the speed limiter 5 again to push the speed limiter claw 3 out of the speed limit channel between the limit blocks 4, and the speed limiter claw 3 and the speed limiter tooth 11 conflict with each other to prevent the shaft 21 from continuing to rotate.

[0055] As an alternative embodiment, the number of speed limiting channels is one or more. The speed limiting member 5 is spherical, and the elastic support member 51 is a spring with a taper. The airbag can be replaced by a cylinder or other lifting mechanism controlled by the travel switch 44.

[0056] In addition to the above embodiments, the present invention may also have other implementation modes; any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A high-reliability elevator speed limiter, comprising: A frame (1) is used to provide a slewing support for the rope wheel (2), wherein the rotating shaft (21) of the rope wheel (2) is slewingly supported on the frame (1), and the frame (1) has a plurality of speed limiting teeth (11) extending toward the rotating shaft (21); It is characterized by: also including: A limit block (4) is arranged on the rotating shaft (21) and rotates synchronously with the rope wheel (2); A speed limiting claw (3) is slidably connected to the limit block (4) and is slidably embedded along the limit block (4) between adjacent speed limiting teeth (11) to prevent the rotating shaft (21) from rotating; A speed measuring component, used for determining the rotation speed of the rope wheel (2), and when the rotation speed of the rope wheel (2) exceeds a preset speed, controlling the speed limiting member (5) to push the speed limiting claw (3) toward the speed limiting tooth (11); There are at least two limit blocks (4), a speed limiting channel for the speed limiting claw (3) to slide is formed between the two limit blocks (4), one end of the speed limiting channel is open, and the opening faces the speed limiting tooth (11), and the speed limiting member (5) is arranged at the bottom end of the speed limiting channel away from the opening; The speed measurement components include: a stop plate (43) rotatably connected to the limit block (4); a torsion spring is provided at the connection between the stop plate (43) and the limit block (4); the stop plate (43) is located between the speed limiting claw (3) and the speed limiting member (5); the speed limiting member (5) rotates with the rope wheel (2) and is controlled by centrifugal force to have a movement tendency to push the stop plate (43) to open; A travel switch (44) is arranged on the opening path of the stop plate (43), and when the speed limiting member (5) is separated from the stop plate (43) and moves toward the speed limiting claw (3), the travel switch (44) is triggered by the stop plate (43); A lifting device is arranged at the bottom of the speed limiting channel and is controlled by the travel switch to push the speed limiting claw (3) to extend.

2. A high-reliability elevator speed governor according to claim 1, characterized in that: The lifting device comprises: The safety airbag is inflated and extended along the speed limiting passage under the control of the travel switch (44), and pushes out the speed limiting claw (3).

3. A high-reliability elevator speed governor according to claim 2, characterized in that: A base (52) is provided at the bottom of the speed limiting channel, an airbag placement groove (521) for installing the safety airbag is provided in the base (52), and the speed limiting component (5) is arranged on the opening of the airbag placement groove (521).

4. A high-reliability elevator speed governor according to claim 3, characterized in that: An elastic support member (51) is supported between the base (52) and the speed limiting member (5), and the elastic support member (51) and the torsion spring at the rotating end of the stop plate (43) are both in an elastically deformed state.

5. A high-reliability elevator speed governor according to claim 4, characterized in that: The elastic support member (51) is a conical spring.

6. A high-reliability elevator speed governor according to claim 5, characterized in that: A limiting protrusion (31) extends from the speed limiting claw (3), a limiting slide groove (41) for cooperating with the limiting protrusion (31) is provided on the limiting block (4), an electromagnet (42) controlled by the travel switch (44) is provided at the bottom of the limiting slide groove (41), and the limiting protrusion (31) is made of a material that can be adsorbed by the electromagnet (42) when electricity is supplied.

7. A high-reliability elevator speed governor according to claim 6, characterized in that: There are two limit protrusions (31), and the speed limiting claw (3) is supported between the two limit protrusions (31), so that a certain gap is left between the speed limiting claw (3) and the limit block (4).

8. A high-reliability elevator speed governor according to any one of claims 1 to 7, characterized in that: There are a plurality of speed limiting claws (3) which are evenly distributed on the rotating shaft (21) in a circumferential manner, and there are a plurality of speed measuring components and limit blocks (4) which are respectively adapted to different speed limiting claws (3).

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