Trigger structure of elevator speed governor

Abstract

The utility model discloses an elevator speed limiter trigger structure which comprises a centrifugal flail block type speed limiter and a wrench, the centrifugal flail block type speed limiter comprises a support, a rope wheel, a ratchet wheel, a connecting rod and a brake arm, the support is provided with a connecting shaft, the wrench comprises a long-strip-shaped wrench body, one end of the wrench body is provided with an inserting groove used for being located with the connecting shaft, and the other end of the wrench body is provided with a connecting rod. One end of the wrench body is provided with a connecting shaft, the other end of the wrench body is provided with a handle part, the bottom of the wrench body is provided with a positioning groove allowing the mounting bolt to be embedded, and the side face of the wrench body is provided with a trigger wheel device. The trigger wheel device makes contact with the connecting rod so that the pawl can be meshed with the ratchet. The speed limiter is suitable for speed limiters with different wheel diameter sizes, simple in structure, convenient to operate, shorter in response time, higher in reliability, more in accordance with the human ergonomics principle, wide in application range, capable of being used by passenger elevators, freight elevators and the like, and high in feasibility.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator speed limiters, in particular to a trigger structure of an elevator speed limiter. Background Art

[0002] According to A1.3.4 linkage test in TSG T7001-2023 "Rules for Elevator Supervision and Periodic Inspection": "During supervision and inspection, if a progressive safety clamp is used, the car is loaded with a load of 125% of the rated load, and the elevator is driven downward at the rated speed. The speed limiter-safety clamp linkage test is carried out to observe whether the speed limiter and safety clamp are reliable. After the test, no damage that has an adverse effect on the normal use of the elevator occurs". At present, there are mainly the following ways to manually trigger the speed limiter for linkage testing on the market:

[0003] 1. Foot trigger: as attached Figure 1 As shown, the operator steps on the box plate and holds it until the speed limiter rope wheel is stopped;

[0004] 2. Manual lever trigger: as shown in the attached Figure 2 As shown, the operator operates the lever to push down in the direction of the arrow and hold it until the rope wheel is stopped.

[0005] Whether the speed limiter is triggered by foot or manual lever, a large holding force is required. For example, when stepping on the box-type plate, the foot strength must be maintained until the speed limiter wire rope is stopped; when manually levering, the hand needs to keep pressing the lever until the rope wheel stops rotating. At present, there is a lack of a more convenient, more labor-saving, and more ergonomic way of triggering the speed limiter. Utility Model Content

[0006] In view of the above-mentioned technical problems, the purpose of the utility model is to provide an elevator speed limiter trigger structure, which has simple structure and manufacturing, wide application range, high reliability and convenient operation.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An elevator speed limiter triggering structure includes a centrifugal block speed limiter and a wrench, wherein the centrifugal block speed limiter includes a bracket, a rope wheel, a ratchet, a connecting rod and a brake arm, wherein the bracket is provided with a connecting shaft, the rope wheel and the ratchet are coaxially arranged on the connecting shaft and are rotatably connected to the bracket, a mounting bolt is arranged on the side of the bracket, a ratchet pawl for engaging with the ratchet is arranged on the rope wheel, the brake arm is rotatably connected to the bracket, a brake shoe is arranged on the brake arm, one end of the connecting rod is rotatably connected to the ratchet, and the other end of the connecting rod is rotatably connected to the ratchet. The end passes through the end of the brake arm away from the bracket; the wrench includes a long strip of wrench body, one end of the wrench body is provided with a slot for positioning with the connecting shaft, the other end is provided with a handle, the bottom of the wrench body is provided with a positioning slot for embedding a mounting bolt, and the side of the wrench body is provided with a trigger wheel device. When the wrench is brought close to the centrifugal block speed limiter so that the connecting shaft is in contact with the bottom of the slot and the mounting bolt is embedded in the positioning slot away from the end of the slot, the trigger wheel device contacts the connecting rod to enable the pawl to engage with the ratchet.

[0009] Preferably, the positioning groove is a long waist hole parallel to the slot.

[0010] Preferably, the positioning groove is an open groove.

[0011] Preferably, the trigger wheel device comprises a roller shaft connected to the wrench body, and a bearing is provided at the end of the roller shaft.

[0012] Preferably, a mounting hole is provided on the wrench body, a stud is provided at the end of the roller shaft away from the bearing, the stud passes through the mounting hole, hexagonal nuts are provided at the positions of the stud on both sides of the wrench body, and a spring washer and a flat washer are provided between the hexagonal nut and the wrench body.

[0013] Preferably, the portion of the roller shaft located outside the bearing is provided with an open retaining ring.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] The utility model elevator speed limiter trigger structure comprises a centrifugal block speed limiter and a wrench. The centrifugal block speed limiter comprises a bracket, a rope wheel, a ratchet, a connecting rod and a brake arm. A connecting shaft is arranged on the bracket. The wrench comprises a long strip-shaped wrench body. A slot for positioning with the connecting shaft is arranged at one end of the wrench body, and a handle is arranged at the other end. A positioning slot for embedding mounting bolts is arranged at the bottom of the wrench body. A trigger wheel device is arranged on the side of the wrench body. When the wrench is brought close to the centrifugal block speed limiter so that the connecting shaft is in contact with the slot bottom and the mounting bolt is embedded in the positioning slot away from the end of the slot, the trigger wheel device contacts the connecting rod so that the pawl engages with the ratchet. The utility model is suitable for speed limiters of different wheel diameters, has a simple structure, is convenient for operation, has a shorter response time, has a higher reliability, is more in line with the principle of ergonomics, has a wide range of applications, can be used in passenger elevators, freight elevators, etc., is simple to manufacture, and has high feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0017] Attached Figure 1 It is a three-dimensional diagram of a foot-activated speed limiter;

[0018] Attached Figure 2 A perspective view of a manual lever-triggered speed limiter;

[0019] Attached Figure 3 It is a schematic diagram of a centrifugal block-type speed governor of an elevator speed governor triggering structure of the utility model;

[0020] Attached Figure 4 It is a three-dimensional diagram of the elevator speed limiter triggering structure of the utility model;

[0021] Attached Figure 5 A three-dimensional diagram of a wrench of the elevator speed limiter triggering structure of the utility model;

[0022] Attached Figure 6 It is a schematic diagram of the trigger wheel device of the elevator speed limiter trigger structure of the utility model;

[0023] Attached Figure 7 It is a front view of another embodiment of the elevator speed limiter triggering structure of the utility model;

[0024] Attached Figure 8 It is a three-dimensional diagram of another embodiment of the elevator speed limiter triggering structure of the utility model.

[0025] Among them: 1. wrench; 2. bracket; 3. rope pulley; 4. ratchet; 5. connecting rod; 6. brake arm; 7. connecting shaft; 8. mounting bolt; 9. pawl; 10. brake shoe; 11. wrench body; 12. slot; 13. handle; 14. positioning groove; 15. trigger wheel device; 16. roller shaft; 17. bearing; 18. stud; 19. hexagonal nut; 20. spring washer; 21. flat washer; 22. open retaining ring. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0027] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0028] Embodiment 1:

[0029] As attached Figure 4 The utility model is shown as the elevator speed limiter trigger structure, including a centrifugal block speed limiter and a wrench 1, as shown in the attached Figure 3 As shown, the centrifugal block speed limiter includes a bracket 2, a rope wheel 3, a ratchet 4, a connecting rod 5 and a brake arm 6. A connecting shaft 7 is installed on the bracket 2. The rope wheel 3 and the ratchet 4 are coaxially installed on the connecting shaft 7 and are rotatably connected with the bracket 2. The side of the bracket 2 has a mounting bolt 8. A ratchet 9 for engaging with the ratchet 4 is installed on the rope wheel 3. The brake arm 6 is rotatably connected with the bracket 2. The brake arm 6 is connected with a brake shoe 10. One end of the connecting rod 5 is rotatably connected with the ratchet 4, and the other end of the connecting rod 5 passes through an end of the brake arm 6 away from the bracket 2. When the rotation speed of the rope wheel 3 exceeds the limited speed, the ratchet 9 extends out to clamp the ratchet 4 so that the ratchet 4 rotates synchronously with the rope wheel 3, and the connecting rod 5 is pulled to drive the brake shoe 10 to press the rope wheel 3 to stop it. The structure of the speed limiter in this embodiment is similar to that of the conventional centrifugal block speed limiter and will not be repeated.

[0030] As attached Figure 5As shown, the wrench 1 includes a long strip of the wrench 1 body, one end of the wrench 1 body is processed with a slot 12 for positioning with the connecting shaft 7, and the other end is formed with a handle portion 13. The bottom of the wrench 1 body is processed with a positioning groove 14 for the mounting bolt 8 to be embedded. In this embodiment, the positioning groove 14 is a long waist hole parallel to the slot 12. When the wrench 1 is moved for positioning, the mounting bolt 8 slides in the positioning groove 14. The positioning groove 14 guides the moving direction of the wrench 1, which is convenient for quick positioning.

[0031] A trigger wheel device 15 is installed on the side of the wrench 1 body. When the wrench 1 is brought close to the centrifugal block speed limiter so that the connecting shaft 7 is in contact with the bottom of the slot 12 and the mounting bolt 8 is moved to the end of the positioning slot 14 away from the slot 12, the trigger wheel device 15 contacts the connecting rod 5 so that the pawl 9 engages with the ratchet 4, the ratchet 4 rotates synchronously with the rope wheel 3, and pulls the connecting rod 5 to drive the brake shoe 10 to press the rope wheel 3 to stop it.

[0032] As attached Figure 6 As shown, the trigger wheel device 15 includes a roller shaft 16 connected to the wrench 1 body, and a bearing 17 is installed at the end of the roller shaft 16. A mounting hole is processed on the wrench 1 body, and a stud 18 is provided at the end of the roller shaft 16 away from the bearing 17. The stud 18 passes through the mounting hole, and the parts of the stud 18 located on both sides of the wrench 1 body are screwed with hexagonal nuts 19 respectively. A spring washer 20 and a flat washer 21 are installed between the hexagonal nut 19 and the wrench 1 body to prevent loosening and make the connection more reliable. The part of the roller shaft 16 located outside the bearing 17 is installed with an open retaining ring 22 to prevent the bearing 17 from coming out.

[0033] Embodiment 2:

[0034] As attached Figure 7 As shown, the difference between this embodiment and embodiment 1 is that the positioning groove 14 on the wrench body 11 in this embodiment is an open groove. Before testing, the wrench 1 is Figure 7 Place it in the position shown in the figure, close to the side plate of the bracket 2 of the speed governor. When the elevator car reaches the rated speed, the operator presses the wrench 1 to the Figure 7 Apply thrust in the direction of the arrow shown, and finally achieve the Figure 8 The effect of the position shown is that the trigger wheel device 15 on the wrench 1 is in contact with the connecting rod 5 of the speed limiter, triggering the pawl 9 of the speed limiter to engage with the ratchet 4, so that the brake shoe 10 presses the wire rope of the speed limiter into the wheel groove of the rope pulley 3. At this time, the wire rope of the speed limiter is lifted and the safety clamp is activated to stop the car.

[0035] The elevator speed limiter trigger structure of the utility model is suitable for speed limiters with different wheel diameters. The mechanical action of the speed limiter is triggered by manually operating a wrench 1, and the structure is simple and easy to operate. The speed limiter is triggered instantly and does not require a large operating force and a holding force, so the response time is shorter and the reliability is higher. The wrench 1 is operated by the slot 12 and the positioning slot 14, so the operation is more convenient, the practicality is high, the operating force is small, and it is more in line with the principle of ergonomics. The utility model has a wide range of applications, and this solution can be used in passenger elevators, freight elevators, etc., and the manufacturing is simple and the feasibility is high.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An elevator speed limiter triggering structure, characterized in that: The invention relates to a centrifugal block speed limiter and a wrench, wherein the centrifugal block speed limiter comprises a bracket, a rope wheel, a ratchet, a connecting rod and a brake arm, wherein the bracket is provided with a connecting shaft, the rope wheel and the ratchet are coaxially arranged on the connecting shaft and are rotatably connected to the bracket, a mounting bolt is arranged on the side of the bracket, a pawl for engaging with the ratchet is arranged on the rope wheel, the brake arm is rotatably connected to the bracket, a brake shoe is arranged on the brake arm, one end of the connecting rod is rotatably connected to the ratchet, and the other end of the connecting rod passes through an end of the brake arm away from the bracket; the wrench comprises a long strip of wrench body, one end of the wrench body is provided with a slot for positioning with the connecting shaft, and the other end is provided with a handle, the bottom of the wrench body is provided with a positioning slot for embedding the mounting bolt, and the side of the wrench body is provided with a trigger wheel device, when the wrench is brought close to the centrifugal block speed limiter so that the connecting shaft is in contact with the bottom of the slot and the mounting bolt is embedded in the positioning slot away from the end of the slot, the trigger wheel device contacts the connecting rod so that the pawl engages with the ratchet.

2. The elevator speed limiter triggering structure according to claim 1, characterized in that: The positioning groove is a long waist hole parallel to the slot.

3. The elevator speed limiter triggering structure according to claim 1, characterized in that: The positioning groove is an open groove.

4. The elevator speed limiter triggering structure according to claim 1, characterized in that: The trigger wheel device comprises a roller shaft connected to the wrench body, and a bearing is arranged at the end of the roller shaft.

5. The elevator speed limiter triggering structure according to claim 4, characterized in that: A mounting hole is provided on the wrench body, a stud is provided at one end of the roller shaft away from the bearing, the stud passes through the mounting hole, hexagonal nuts are provided at the positions of the stud on both sides of the wrench body, and a spring washer and a flat washer are provided between the hexagonal nut and the wrench body.

6. The elevator speed limiter triggering structure according to claim 4, characterized in that: The portion of the roller shaft located outside the bearing is provided with an open retaining ring.

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