Agile elevator speed limiting protection device

Abstract

The utility model relates to elevator safety field, the utility model aims at providing a kind of agile elevator speed limiting protection device, solve the problem of not enough sensitive centrifuge braking, rope wheel subassembly includes pressure disc, rope wheel, central shaft, bearing wheel disc, first friction plate and second friction plate, first friction plate and second friction plate are respectively arranged in the two sides of rope wheel, pressure disc is connected with bearing wheel disc, for winding steel wire rope on the rope wheel, for winding pull rope on the rope wheel;The brake assembly includes brake drum and centrifuge, the centrifuge is arranged on the bearing wheel disc, the centrifuge is arranged around the brake drum;Such as sheet occupies small space, adjacent flail block is more compact, the distance of gyro wheel movement is short, gyro wheel is more easily with brake drum produce friction, and further gyro wheel can be quickly braked drum and limit block clamping, centrifuge can agile brake, safety tongs quick trigger, elevator car safe operation, thus solve the problem of not enough sensitive centrifuge braking.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety, and in particular to an agile elevator speed limiting protection device. Background Technology

[0002] Elevators are widely used in people's daily lives. During elevator installation, temporary speed governors are used to prevent the elevator from overspeeding during testing and causing injury to workers. Elevator speed governors are used as safety components to monitor for overspeeding. When the elevator overspeeds, the speed governor is triggered, which brakes the sheave. The rope then triggers the safety brake, which slows the car down until it comes to a complete stop.

[0003] Currently, the speed limiter contains too few swing blocks. Due to the excessively large moving distance of the connected blocks, the swing blocks require a long time to clamp the rollers together with the brake drum, resulting in a slow response. Consequently, the centrifugal braking is not sensitive enough, and there is spring resistance and system friction when the swing blocks open. Furthermore, the system friction is unstable when the rope pulley in the speed limiter rotates at low speeds, preventing the swing blocks from opening accurately at the set speed. Utility Model Content

[0004] The purpose of this invention is to provide an agile elevator speed limiting protection device, which solves the problem of insufficient sensitivity of centrifugal braking.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides an agile elevator speed limiting protection device, including a rope pulley assembly and a braking assembly, characterized in that...

[0007] The rope wheel assembly includes a pressure plate, a rope wheel, a central shaft, a bearing wheel, a first friction plate, and a second friction plate. The first friction plate and the second friction plate are respectively arranged on both sides of the rope wheel. The pressure plate is connected to the bearing wheel. The pressure plate is arranged to fit against the outer side of the first friction plate, and the bearing wheel is arranged to fit against the outer side of the second friction plate. The pressure plate, the rope wheel, and the bearing wheel are rotatably sleeved on the central shaft.

[0008] The braking assembly includes a brake drum and a centrifugal body, the centrifugal body being disposed on the bearing wheel disc;

[0009] The centrifugal body includes at least three sling shafts and at least three sling blocks. The sling shafts are mounted on the bearing wheel, and the sling blocks are rotatably mounted on the sling shafts. A connecting plate is bent between adjacent sling blocks, and a roller is rotatably mounted on the connecting plate. The brake drum is located on the movement path of the roller.

[0010] The centrifugal body also includes a limiting block, which is disposed on the bearing wheel. The swing block drives the connecting plate to move, and the connecting plate drives the roller to press against the brake drum. A limiting space is formed between the limiting block and the brake drum, and the limiting space is used to engage the roller.

[0011] Optionally, the connecting piece includes an integrally formed first curved piece and a second curved piece, and the roller is disposed at the connection between the first curved piece and the second curved piece.

[0012] Optionally, the inlet size of the limiting space is larger than the outlet size, and the limiting space extends in a contracted state.

[0013] Optionally, the brake drum is sleeved on the central shaft.

[0014] Optionally, the centrifuge body further includes an elastic mechanism, with its two ends respectively connected to two adjacent throwing blocks, and the elastic mechanism and the connecting plate located on both sides of the throwing blocks.

[0015] Furthermore, the elastic mechanism includes a limiting spring, a first rotating plate, a second rotating plate, and a connecting column. The first rotating plate and the second rotating plate are rotatably mounted on two adjacent swing blocks, the limiting spring is sleeved on the connecting column, the connecting column is connected to the first rotating plate, the second rotating plate has a lever, the connecting column is movably mounted on the lever, and a limiting piece is also provided on the connecting column. The two ends of the limiting spring abut against the limiting piece and the lever, respectively.

[0016] Furthermore, the elastic mechanism also includes a tension spring, with its two ends respectively connected to two adjacent throwing blocks.

[0017] Optionally, the pressure plate has a first boss, the rope wheel has a first recess, the first friction plate is sleeved on the first boss, and the first friction plate is located inside the first recess.

[0018] Furthermore, the bearing wheel has a second protrusion, the rope wheel has a second recessed platform, the second friction plate is sleeved on the second protrusion, the second friction plate is located inside the second recessed platform, and the first recessed platform and the second recessed platform are respectively located on both sides of the rope wheel.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] This utility model discloses an agile elevator speed limiting protection device. Due to the continuous bending design, the continuous pieces occupy less space, the adjacent swing blocks are more compact, the roller travels a shorter distance, and the roller is more likely to rub against the brake drum. As a result, the roller can be quickly engaged by the brake drum and the limit block, the centrifugal body can brake agilely, the safety clamp is quickly triggered, and the elevator car runs safely. Therefore, it solves the problem of insufficient sensitivity of centrifugal body braking. Attached Figure Description

[0021] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0022] Figure 1 This is a perspective view of an agile elevator speed limiting protection device according to a preferred embodiment of the present utility model;

[0023] Figure 2 yes Figure 1 Exploded view of the partial structure shown;

[0024] Figure 3 This is a three-dimensional view of the braking assembly;

[0025] Figure 4 yes Figure 3 The enlarged view of part A is shown below;

[0026] Figure 5 This is a separate view of the braking assembly and the load-bearing wheel disc;

[0027] Figure 6 yes Figure 5 The brake assembly is shown as a separate view from the load-bearing wheel disc from another perspective.

[0028] Figure 7 This is a three-dimensional view of the limit spring.

[0029] Figure 8 This is a separate view of the rope pulley, the second friction plate, and the load-bearing wheel.

[0030] Figure 9 It is a three-dimensional view of the rope pulley assembly and brake assembly being fixed.

[0031] Figure 10 This is a three-dimensional view of the pressure plate;

[0032] Figure 11 This is a front view of the limit spring directly connecting adjacent throwing blocks.

[0033] The reference numerals in the attached figures are explained as follows:

[0034] 1. Rope pulley assembly; 2. Braking assembly; 3. Bracket; 4. Baffle; 5. Cover; 6. Elastic mechanism; 11. Pressure plate; 12. Rope pulley; 13. Central shaft; 14. Bearing wheel disc; 15. First friction plate; 16. Second friction plate; 21. Brake drum; 22. Centrifugal body; 23. Sling shaft; 24. Sling; 25. Connecting plate; 26. Roller; 27. Limiting block; 28. Limiting space; 29. ​​Limiting spring; 60. Tension spring; 61. Bolt; 62. Disc spring; 63. Bolt head; 295. Limiting plate; 111. First boss; 121. First recessed platform; 122. Second recessed platform; 141. Second boss; 201. First column; 202. Second column; 251. First track; 252. Second track; 291. First rotating track; 292. Second rotating track; 293. Connecting post; 294. Pick; 295. Limiting track. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figure 1 and Figure 2 and Figure 3As shown, an agile elevator speed limiting protection device includes a rope pulley assembly 1 and a braking assembly 2. The rope pulley assembly 1 includes a pressure plate 11, a rope pulley 12, a central shaft 13, a bearing wheel 14, a first friction plate 15, and a second friction plate 16. The first friction plate 15 and the second friction plate 16 are respectively arranged on both sides of the rope pulley 12. The pressure plate 11 is connected to the bearing wheel 14. The pressure plate 11 is arranged to fit against the outer side of the first friction plate 15, and the bearing wheel 14 is arranged to fit against the outer side of the second friction plate 16. The pressure plate 11 and the bearing wheel 14 clamp the first friction plate 15 and the second friction plate 16 from both sides. The pressure plate 11, the rope pulley 12, and the bearing wheel 14 are rotatably sleeved on the central shaft 13. The rope pulley 12 is used to wind the pull rope. The rope pulley 12 rotates on the central shaft 13, and the rope pulley 12 drives the pressure plate 11 and the bearing wheel 14 to rotate together on the central shaft 13.

[0039] The braking assembly 2 includes a brake drum 21 and a centrifugal body 22. The centrifugal body 22 is mounted on the support wheel 14 and surrounds the brake drum 21. The centrifugal body 22 includes a sling shaft 23 and sling blocks 24. The number of sling blocks 24 corresponds to the number of sling shafts 23. The sling shafts 23 are mounted on the support wheel 14, and the sling blocks 24 are rotatably mounted on the sling shafts 23. A curved connecting piece 25 is provided between adjacent sling blocks 24, and two sling blocks 24 are connected to each end of the connecting piece 25. In this example, there are bearings on the sling shafts 23, and the sling blocks 24 are sleeved on the bearings. The centrifugal body 22 includes at least three sling shafts 23 and at least three sling blocks 24.

[0040] A roller 26 is rotatably mounted on the connecting plate 25, and the brake drum 21 is located on the moving path of the roller 26. The centrifugal body 22 also includes a limiting block 27, which is mounted on the bearing wheel 14. When the speed of the rope wheel 12 gradually increases, the swing block 24 will rotate on the swing block shaft 23. The swing block 24 swings outward around the swing block shaft 23 and swings outward toward the bearing wheel 14. The swing block 24 drives the connecting plate 25 to move, and the connecting plate 25 drives the roller 26 to press against the brake drum 21. The roller 26 and the brake drum 21 roll and rub against each other, thus increasing the friction force when the roller 26 rotates.

[0041] like Figure 4 and Figure 5 and Figure 6As shown, a limiting space 28 is formed between the limiting block 27 and the brake drum 21. The limiting space 28 is used to engage the roller 26. The limiting block 27 and the brake drum 21 are used to jointly clamp the roller 26. The connecting piece 25 continues to drive the roller 26 to move. The roller 26 moves within the limiting space 28 until the roller 26 is clamped by the limiting block 27 and the brake drum 21. The roller 26 is engaged at the inlet end of the limiting space 28 to prevent the roller 26 from continuing to rotate. The roller 26 no longer rotates relative to the bearing wheel 14, but the roller 26 still rotates against the brake drum 21. Friction is generated between the roller 26 and the brake drum 21 to increase the friction between the brake drum 21 and the roller 26. As a result, the centrifugal body 22 and the bearing wheel 14 have resistance due to the increased friction. The corresponding rope pulley 12 decelerates, and the rope triggers the safety clamp, and the elevator car stops moving.

[0042] The connecting piece 25 includes an integrally formed first curved piece 251 and second curved piece 252. A roller 26 is disposed at the connection between the first curved piece 251 and the second curved piece 252. Both the first curved piece 251 and the second curved piece 252 are curved. A first positioning shaft 241 and a second positioning shaft 242 are disposed on the throwing block 24. The outer end of the first curved piece 251 is rotatably connected to the first positioning shaft 241, and the outer end of the second curved piece 252 is rotatably connected to the second positioning shaft 242. The first positioning shaft 241 is disposed on the throwing block shaft 23. The second positioning shaft 242 is set on the inner swing part of the swing block 24. The inner swing part is the part of the swing block 24 that rotates towards the central axis 13 when the swing block 24 rotates. The second positioning shaft 242 is away from the outer swing part of the swing block 24. The outer swing part is the part of the swing block 24 that rotates away from the central axis 13 under the action of centrifugal force when the swing block 24 rotates. The inner swing part and the outer swing part on the swing block 24 swing in opposite directions. The inner swing part and the outer swing part on the swing block 24 are located on both sides of the swing block shaft 23.

[0043] The inlet size of the limiting space 28 is larger than the outlet size, and the limiting space 28 extends in a contracted state. The entire roller 26 enters the limiting space 28 until the roller 26 is clamped by the limiting block 27 and the brake drum 21. The roller 26 no longer rotates and cannot be moved out of the limiting space 28.

[0044] like Figure 6 and Figure 7 As shown, the centrifuge body 22 also includes an elastic mechanism 6, with its two ends connected to two adjacent swing blocks 24 respectively. The elastic mechanism 6 and the connecting plate 25 are located on both sides of the swing blocks 24 respectively.

[0045] The elastic mechanism 6 includes a limiting spring 29, a first rotating plate 291, a second rotating plate 292, and a connecting column 293. The first rotating plate 291 and the second rotating plate 292 are rotatably mounted on two adjacent swing blocks 24, respectively. The limiting spring 29 is sleeved on the connecting column 293, and the connecting column 293 is connected to the first rotating plate 291. The second rotating plate 292 has a lever 294, and there is an angle between the lever 294 and the second rotating plate 292. The connecting column 293 is movably mounted on the lever 294. The connecting column 293 is also provided with a limiting piece 295, and the two ends of the limiting spring 29 abut against the limiting piece 295 and the lever 294, respectively.

[0046] When the swing block 24 swings outward, the first rotating plate 291 drives the connecting column 293 to move, the limiting plate 295 and the lever 294 approach each other, and the limiting spring 29 is compressed. After the rope wheel 12 reduces its speed, the limiting spring 29 helps the swing block 24 to quickly return to its original position.

[0047] like Figure 2 and Figure 8 and Figure 10 As shown, the pressure plate 11 has a first boss 111, the rope wheel 12 has a first sinker 121, the first friction plate 15 is sleeved on the first boss 111, and the first friction plate 15 is located inside the first sinker 121.

[0048] Furthermore, the bearing wheel 14 has a second boss 141, and the rope wheel 12 has a second sinker 122. The first sinker 121 and the second sinker 122 are located on the two sides of the rope wheel 12, respectively. The second friction plate 16 is sleeved on the second boss 141 and is located inside the second sinker 122. The pressure plate 11 and the bearing wheel 14 are connected by a bolt 61. A disc spring 62 is sleeved on the bolt 61. The bolt 61 has a bolt head 63. The disc spring 62 is pressed between the bolt head 63 and the pressure plate 11. The disc spring 62 is used to adjust the friction force of the first friction plate 15 and the second friction plate 16. The pressure plate 11 squeezes the first friction plate 15, and the bearing wheel 14 squeezes the second friction plate 16. In this way, the rope wheel 12 is squeezed by the first friction plate 15 and the second friction plate 16. The tightness of the first friction plate 15 and the second friction plate 16 can be adjusted by rotating the bolt 61.

[0049] When the roller 26 is clamped by the limiting block 27 and the brake drum 21 until the roller 26 stops rotating, a sufficiently large frictional force is generated. The movement of the swing block 24 and the connecting piece 25 is resisted, and the rotation of the bearing wheel 14 and the pressure plate 11 is also resisted. However, the first friction plate 15 and the second friction plate 16 continue to rotate under the drive of the rope wheel 12. Therefore, sliding friction occurs between the pressure plate 11 and the first friction plate 15, and between the bearing wheel 14 and the second friction plate 16. In turn, sliding friction occurs between the first friction plate 15 and the second friction plate 16 and both sides of the rope wheel 12, causing the rotation of the rope wheel 12 to be resisted. The rope on the rope wheel 12 is resisted, and the resistance to the rope triggers the safety clamp on the elevator car. The triggered safety clamp stops the elevator car.

[0050] like Figure 2 and Figure 9 As shown, the brake drum 21 is sleeved on the central shaft 13. The brake drum 21 is connected to the outer cover 5. The brake drum 21 and the centrifugal body 22 are covered by the cover 5. The cover 5 is connected to the support 3. The support 3 supports the cover 5. The support 3 is provided with a baffle 4. The baffle 4 is bent and set on the support 3. The two ends of the central shaft 13 are fixed to the baffle 4 and the brake drum 21 respectively.

[0051] like Figure 11 As shown, in other embodiments, the elastic mechanism 6 further includes a tension spring 60, with its two ends connected to two adjacent swing blocks 24 respectively. The two adjacent swing blocks 24 are respectively provided with a first column 201 and a second column 202, and the two ends of the limiting spring 29 are respectively connected to the first column 201 and the second column 202.

[0052] The principle behind this example is the use of three swing blocks 24 to ensure the accuracy of the action speed. How is this achieved? It is by increasing the weight of the centrifugal body 22 to increase the centrifugal force, thereby limiting the opening speed of the swing blocks 24. The force of the limit spring 29 must also be increased accordingly. As a result, when the speed limiter is running, the ratio of the frictional resistance between each moving pair to the spring force will decrease to a very low level, thereby improving the accuracy of the speed limiter's action speed.

[0053] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A speed-limiting protection device for an elevator, comprising a pulley assembly (1) and a braking assembly (2), characterized in that, The rope wheel assembly (1) includes a pressure plate (11), a rope wheel (12), a central shaft (13), a bearing wheel (14), a first friction plate (15), and a second friction plate (16). The first friction plate (15) and the second friction plate (16) are respectively arranged on both sides of the rope wheel (12). The pressure plate (11) is connected to the bearing wheel (14). The pressure plate (11) is arranged to fit against the outer side of the first friction plate (15), and the bearing wheel (14) is arranged to fit against the outer side of the second friction plate (16). The pressure plate (11), the rope wheel (12), and the bearing wheel (14) are rotatably sleeved on the central shaft (13). The braking assembly (2) includes a brake drum (21) and a centrifugal body (22), the centrifugal body (22) being disposed on the bearing wheel disc (14); The centrifugal body (22) includes at least three sling shafts (23) and at least three sling blocks (24). The sling shafts (23) are mounted on the bearing wheel (14). The sling blocks (24) are rotatably mounted on the sling shafts (23). A connecting piece (25) is bent between adjacent sling blocks (24). A roller (26) is rotatably mounted on the connecting piece (25). The brake drum (21) is located on the movement path of the roller (26). The centrifugal body (22) also includes a limiting block (27), which is disposed on the bearing wheel (14). The swing block (24) drives the connecting piece (25) to move, and the connecting piece (25) drives the roller (26) to press against the brake drum (21). A limiting space (28) is formed between the limiting block (27) and the brake drum (21). The limiting space (28) is used to engage the roller (26).

2. Agile elevator overspeed protection device according to claim 1, characterized in that The connecting piece (25) includes an integrally formed first curved piece (251) and a second curved piece (252), and the roller (26) is disposed at the connection between the first curved piece (251) and the second curved piece (252).

3. The agile elevator overspeed protection device of claim 1, wherein, The inlet size of the limiting space (28) is larger than the outlet size, and the limiting space (28) extends in a contracted state.

4. The agile elevator speed limiting protection device according to claim 1, characterized in that, The brake drum (21) is fitted onto the central shaft (13).

5. The agile elevator speed limiting protection device according to claim 1, characterized in that, The centrifuge body (22) also includes an elastic mechanism (6), with the two ends of the elastic mechanism (6) respectively connected to two adjacent throwing blocks (24), and the elastic mechanism (6) and the connecting piece (25) are located on both sides of the throwing block (24).

6. The agile elevator speed limiting protection device according to claim 5, characterized in that, The elastic mechanism (6) includes a limiting spring (29), a first rotating plate (291), a second rotating plate (292), and a connecting column (293). The first rotating plate (291) and the second rotating plate (292) are rotatably mounted on two adjacent swing blocks (24). The limiting spring (29) is sleeved on the connecting column (293). The connecting column (293) is connected to the first rotating plate (291). The second rotating plate (292) has a lever (294). The connecting column (293) is movably mounted on the lever (294). The connecting column (293) is also provided with a limiting piece (295). The two ends of the limiting spring (29) abut against the limiting piece (295) and the lever (294), respectively.

7. The agile elevator speed limiting protection device according to claim 5, characterized in that, The elastic mechanism (6) also includes a tension spring (60), the two ends of which are respectively connected to two adjacent throwing blocks (24).

8. The agile elevator speed limiting protection device according to claim 1, characterized in that, The pressure plate (11) has a first boss (111), the rope wheel (12) has a first sinker (121), the first friction plate (15) is sleeved on the first boss (111), and the first friction plate (15) is located inside the first sinker (121).

9. The agile elevator speed limiting protection device according to claim 8, characterized in that, The bearing wheel (14) has a second boss (141), the rope wheel (12) is provided with a second sinker (122), the second friction plate (16) is sleeved on the second boss (141), the second friction plate (16) is located inside the second sinker (122), and the first sinker (121) and the second sinker (122) are respectively located on the two sides of the rope wheel (12).

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