An automatic reset type elevator speed governor

Abstract

The application relates to an automatic reset type elevator speed limiter, which comprises a speed limiter box body, a brake mechanism arranged in the speed limiter box body, a connecting rod and a rope clamping part, the connecting rod is connected with the rope clamping part and triggers the rope clamping part to act, the rope clamping part comprises a fixed clamp head and a movable clamp head for clamping a steel wire rope, the connecting rod is connected with the movable clamp head, a reset top block is arranged in the fixed clamp head, a reset guide column and a blind hole are arranged in the reset top block, one end of the reset guide column extends into the movable clamp head and the other end penetrates through the fixed clamp head, a reset spring is arranged on the reset guide column, and the reset spring extends into the reset top block and the movable clamp head at two ends, the reset rod is inserted in a small range and a short distance, and the reset rod can be quickly reset after being inserted into the through hole; the reset rod is directly inserted into the reset top block to push, so that the reset guide column pushes the movable clamp head to realize reset, and when the reset rod is pulled out, the reset top block is automatically reset, and the time required for the rotating in and rotating out is reduced without the rotating in and rotating out actions of the reset rod.

Description

Technical Field

[0001] This invention relates to an elevator safety component, specifically to the field of elevator speed governors, and particularly to an automatic reset type elevator speed governor. Background Technology

[0002] Elevators are widely used in people's daily lives. To ensure safety and prevent injuries caused by elevator overspeed, elevator speed governors are used as safety components to monitor for overspeed. When an elevator experiences an overspeed malfunction or tests its linkage function, it promptly sends a signal, cutting off the elevator's safety circuit via an electrical switch, thereby cutting off the system power and braking the traction mechanism. Simultaneously, it triggers the rope clamping mechanism, clamping the steel wire rope and stopping the car and counterweight. If the car or counterweight stops mid-air and is not aligned with the elevator exit, a reset mechanism is needed to reset the rope clamping mechanism, causing the elevator to descend or ascend to the corresponding exit.

[0003] Existing reset structures are mostly reset mechanisms as shown in Chinese patents CN115448122A and CN115432536A. In this scheme, the reset rod is threaded into the fixed seat and then screwed into the threaded hole of the movable chuck. The movable chuck is then pulled out, causing the rope clamping component and the linkage rod to reset. In this scheme, the reset rod is inserted from the other end of the fixed seat, which requires a certain length of path to reach the movable chuck. During the extension process, problems often arise such as not being able to insert quickly, needing to try multiple times, and not being able to screw it in completely. At the same time, the movable chuck needs to be pulled back to reset before the reset rod is screwed out of the threaded hole. Due to the long distance, the screwing in and out wastes time. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic reset type elevator speed governor, which solves the problem of slow reset when the reset rod resets the movable clamp in existing speed governors.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention provides an automatic reset type elevator speed governor, comprising a speed governor housing, a braking mechanism, a connecting rod, and a rope clamping component disposed within the speed governor housing. The braking mechanism detects the speed of the elevator wire rope and triggers the connecting rod to actuate based on the speed. The connecting rod is connected to and triggers the rope clamping component to actuate. The rope clamping component includes a fixed clamp and a movable clamp. The opposite end faces of the fixed and movable clamps are each provided with a clamping groove for the elevator wire rope to pass through. The connecting rod is connected to and actuates with the movable clamp. The fixed clamp contains a movable clamping groove. A horizontally movable reset top block is provided, and a reset guide post is provided inside the reset top block. One end of the reset guide post extends into the movable chuck. Limiting holes are provided on the opposite end faces of the reset top block and the movable chuck. The limiting holes are provided corresponding to the reset guide post and have a diameter larger than the reset guide post. A reset spring is provided on the outer sleeve of the reset guide post. The two ends of the reset spring are respectively inserted into the limiting holes of the reset top block and the movable chuck. The reset top block and the fixed chuck are provided with reset holes for the reset rod to pass through. The limiting holes and the reset holes on the reset top block are blind holes.

[0007] The applicant has further optimization measures for the above technical solution.

[0008] Optionally, one end of the reset guide post inserted into the movable clamp is connected to the movable clamp.

[0009] Furthermore, at least two reset guide posts are provided. The reset guide posts pass through the fixing clamp and the speed limiter housing in sequence and extend out of the speed limiter housing. The end of the reset guide post extending out of the speed limiter housing is connected to the measuring plate. The measuring plate and the speed limiter housing are also provided with reset holes for the reset rod to pass through.

[0010] Optionally, a switch mechanism for monitoring the mechanical action of the speed governor is provided above the measuring plate. The switch mechanism controls the opening and closing of the elevator safety circuit and is connected to the side wall of the speed governor housing.

[0011] Furthermore, the switching mechanism includes a switch body, a contact switch disposed on the end face of the switch body, and a roller. The roller is connected to the switch body via a rocker arm. One end of the rocker arm is hinged to the end face where the contact switch is located, and the other end rests on the end face of the measuring plate. The roller is located within the horizontal projection range of the through hole of the measuring plate.

[0012] Optionally, the reset top block is located in the groove on the side of the fixed clamp near the movable clamp, and the reset top block is provided with a clearance groove corresponding to the position of the elevator wire rope.

[0013] Furthermore, with the reset rod inserted into the reset top block, the outer peripheral surface of the rear end of the reset rod abuts against the roller. Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0014] The automatic reset type elevator speed governor of this invention has a horizontally movable reset top block set inside the fixed clamp. The reset top block has a reset guide post and a reset hole. One end of the reset guide post extends into the movable clamp. During reset, a reset rod is inserted into the reset hole and extends into the reset top block, pushing the reset top block. As the reset top block moves forward, the reset guide post inside pushes the movable clamp. As the movable clamp moves in the opposite direction, it no longer clamps the elevator wire rope, and the connecting rod and rope clamping components reset accordingly. Simultaneously, due to the presence of a reset spring, the reset top block automatically springs back when the reset rod is withdrawn, eliminating the need for manual reset and allowing for automatic reset before the next use. In this invention, the reset rod has a small insertion range and short distance. Inserting it into the through hole allows for quick alignment, pushing, and reset. The reset rod is directly inserted into the reset top block, causing the reset guide post to push the movable clamp to reset. When the reset rod is withdrawn, the reset top block automatically resets, eliminating the need for the reset rod to rotate in and out, thus reducing the time required for rotation. Attached Figure Description

[0015] The following sections will describe some specific embodiments of the invention in detail 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 portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0016] Figure 1 This is a front view of the overall structure of a fast-reset type elevator speed governor in its encapsulated state according to an embodiment of the present invention.

[0017] Figure 2 This is a side view of the overall structure of a fast-reset type elevator speed governor in its encapsulated state according to an embodiment of the present invention.

[0018] Figure 3 This is a structural schematic diagram of a quick-reset elevator speed governor in the state of removing the speed governor housing according to an embodiment of the present invention, used to show the internal main structure;

[0019] Figure 4 This is a schematic diagram of the connection between the linkage rod, the braking mechanism, and the hook plate;

[0020] Figure 5 This is a schematic diagram of the structure of the rope clamping component removing the front cover plate in an embodiment of the present invention when the rope is not clamped;

[0021] Figure 6 This is a structural diagram showing the assembly of the reset top block and the reset rod;

[0022] Figure 7 This is a schematic diagram of the reset top block;

[0023] Figure 8 yes Figure 2 Enlarged view of point A.

[0024] The reference numerals in the attached figures are explained as follows:

[0025] 1. Speed ​​limiter housing; 11. Braking mechanism; 12. Linkage rod; 13. Locking pin; 14. Support plate; 15. Return compression spring; 16. Top plate;

[0026] 2. Fixed base; 21. Fixed chuck; 22. Movable chuck; 23. Compression spring; 24. Clamping groove;

[0027] 31. Hook plate; 32. Limiting groove; 33. Limiting post; 34. Connecting plate; 341. U-shaped notch;

[0028] 41. Reset top block; 411. Clearance groove; 42. Reset guide post; 43. Reset hole; 44. Reset rod; 441. Limit head; 45. Measuring plate; 46. Reset spring; 47. Limit hole;

[0029] 51. Switch body; 52. Contact switch; 53. Roller;

[0030] 6. Steel wire rope; Detailed Implementation

[0031] The technical solution of the present invention 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 the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention 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 invention. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0033] like Figure 1 and Figure 3As shown, this embodiment provides an automatic reset type elevator speed governor, including a speed governor housing 1, a braking mechanism 11, a connecting rod 12, and a rope clamping component disposed in the speed governor housing 1. The braking mechanism 11 is used to detect the speed of the elevator wire rope 6 and trigger the connecting rod 12 to act according to the speed. At the same time, it actively touches the main brake switch mechanism according to the speed of the wire rope 6. The main brake switch mechanism is used to control the start and stop of the traction machine. The braking mechanism 11 touches the rope clamping component to act through the connecting rod 12, so that the rope clamping component can quickly clamp the wire rope 6 and prevent the car from falling rapidly.

[0034] like Figure 5 As shown, the rope clamping component includes a fixed base 2, a fixed clamp 21 and a movable clamp 22 disposed on the fixed base 2. The fixed base 2 is connected within the frame. The fixed clamp 21 is connected to and fixed at one end within the fixed base 2. The movable clamp 22 is slidably disposed within the fixed base 2. The opposite end faces of the fixed clamp 21 and the movable clamp 22 are provided with clamping grooves 24 for the elevator wire rope 6 to pass through. The wire rope 6 passes through the clamping groove 24 between the fixed clamp 21 and the movable clamp 22. The cross-section of the clamping groove 24 is a triangular structure. A compression spring 23 is provided between one side of the movable clamp 22 facing the fixed clamp 21 and the opposite side and the other end of the fixed base 2. The compression spring 23 is used to push the movable clamp 22 towards the fixed clamp 21.

[0035] A hook plate 31 is also provided on the outer side of the fixed base 2. A guide groove is opened on the front or rear side plate of the fixed base 2. One end of the hook plate 31 is fixedly connected to the movable clamp 22 through the guide groove by a connecting pin. The other end of the hook plate 31 is slidably connected to the bottom end of the linkage rod 12. A limit post 33 is provided on the outer side of the fixed base 2. A limit groove 32 is provided on the lower edge of the hook plate 31. The limit groove 32 is engaged in the limit post 33. Under normal circumstances, due to the cooperation of the limit post 33 and the limit groove 32, the hook plate 31 is limited and pulls the movable clamp 22 away from the fixed clamp 21. As the linkage rod 12 drives the front hook plate 31 to move, the hook plate 31 loses its limitation on the movable clamp 22. The movable clamp 22 then approaches the fixed clamp 21 under the action of the compression spring 23 and clamps the wire rope 6.

[0036] like Figure 4As shown, a locking pin 13 is fixedly connected to the bottom of the connecting rod 12. A support bending plate 14 is also sleeved on the connecting rod 12. Both ends of the support bending plate 14 are sleeved on the connecting rod 12. A return compression spring 15 and a top plate 16 are also sleeved on the outside of the connecting rod 12. The top plate 16 is fixed on the connecting rod 12. The return compression spring 15 is located between the top plate 16 and the upper end of the support bending plate 14. A connecting plate 34 is provided at the other end of the hook plate 31 connected to the connecting rod 12. A U-shaped notch 341 is provided on the connecting plate 34. The U-shaped notch is locked in the position of the connecting rod 12 between the locking pin 13 and the support bending plate 14, close to the locking pin 13. In this way, when the connecting rod 12 moves upward, the hook plate 31 can be driven upward through the locking pin 13. At the same time, the existence of the U-shaped notch 341 allows the hook plate 31 to slide left and right on the connecting rod 12. When the movable clamp 22 moves towards the fixed clamp 21, it will not hinder the connection between the front hook plate 31 and the connecting rod 12.

[0037] The fixed clamp 21 has a groove on the side facing the movable clamp 22. A reset top block 41 is provided in the groove. The shape of the reset top block 41 matches the shape of the groove. The reset top block 41 has a vertical clearance groove 411 corresponding to the position of the elevator wire rope 6. In this way, when the reset top block 41 is pushed to move towards the movable clamp 22, the reset top block 41 will not affect the elevator wire rope 6.

[0038] like Figure 6 and Figure 7 As shown, the reset top block 41 is provided with a reset hole 43, which is located between the reset guide posts 42. The fixed clamp 21 is also provided with a reset hole 43 for the reset rod 44 to pass through. It also includes a reset rod 44 for resetting the movable clamp 22. The diameter of the reset rod 44 is not greater than the diameter of the reset hole 43. In this way, the reset rod 44 can be inserted into the reset hole 43 and extend into the reset top block 41, which can push the reset top block 41 to move in the horizontal direction. When moving in the horizontal direction, it drives the reset guide post 42 to push the movable clamp 22 in the horizontal direction, pushing the movable clamp 22 to the other end of the fixed seat 2, releasing the elevator wire rope 6. At the same time, the movable clamp 22 drives the hook plate 31 to reset. After the hook plate 31 is reset, it will transmit the motion state to the braking mechanism 11. The braking mechanism 11 simultaneously controls the traction machine to continue to move, helping the elevator to move and realizing the reset of the elevator.

[0039] The reset guide post 42 is connected to the reset top block 41. There are at least two reset guide posts 42, but there can be four or six, arranged symmetrically. This is mainly to ensure greater stability when pushing the movable clamping block. One end of the reset guide post 42 extends into the movable clamping head 22, and the other end passes through the reset top block 41 and the fixed clamping head 21 in sequence. Limiting holes 47 are provided on opposite end faces of the reset top block 41 and the movable clamping head 22, corresponding to the reset guide post 42. The two ends of the reset guide post 42... The reset guide post 42 is inserted into the reset top block 41 and the limiting hole 47 of the limiting hole 47, respectively. The diameter of the limiting hole 47 is larger than that of the reset guide post 42. The reset guide post 42 is fitted with a reset spring 46, and the two ends of the reset spring 46 are inserted into the limiting holes 47 of the reset top block 41 and the movable chuck 22, respectively. In this way, when the reset top block 41 moves toward the movable chuck 22, the spring on the reset guide post 42 is compressed. When the reset rod 44 is pulled out, the reset top block 41 automatically resets due to the spring's rebound. The limiting hole 47 and the reset hole 43 on the reset top block 41 are blind holes.

[0040] In this example, the end of the reset guide post 42 inserted into the limiting hole 47 of the movable chuck 22 is connected to the movable chuck 22, so that the reset guide post 42 and the movable chuck 22 can be linked. When the reset rod 44 pushes the reset top block 41, the reset guide post 42 will push the movable chuck 22 forward.

[0041] like Figure 2 As shown, the reset guide post 42 also penetrates through the speed limiter housing 1 and extends out of the speed limiter housing 1. The end of the reset guide post 42 extending out of the speed limiter housing 1 is connected to the measuring plate 45. The measuring plate 45 and the speed limiter housing 1 are also provided with reset holes 43 for the reset rod 44 to pass through. The reset rod 44 passes through the reset hole 43 and the through hole and extends into the blind hole, pushing the reset top block 41 forward to the other end of the fixed seat 2. The measuring plate 45 can help limit the reset rod 44. The rear end of the reset rod 44 is provided with a limiting head 441. The diameter of the limiting head 441 is larger than the diameter of the reset hole 43. Thus, when the reset rod 44 is inserted into the reset hole 43, due to the presence of the limiting head 441, it can only push the reset top block 41 within a limited distance, thereby pushing the movable clamp 22. The measuring plate 45 is beneficial to limit the extension of the reset rod 44.

[0042] like Figure 8As shown, a switch mechanism for monitoring the mechanical action of the speed governor is installed above the measuring plate 45. The switch mechanism is used to control the opening and closing of the elevator safety circuit. After the wire rope overspeeds, not only does the movable clamp clamp the wire rope, but the switch mechanism also disconnects the entire elevator safety circuit to ensure that the car or counterweight will not continue to descend and will stop moving. In this example, the switch mechanism includes a switch body 51, a contact switch 52, and a rotatably connected roller 53. One end of the swing arm is hinged to the bottom surface of the roller switch body 51, and the other end is hinged to the roller 53. The contact switch 52 is also located on the bottom surface of the switch body 51. The roller 53 is mounted on the upper end of the measuring plate 45 and extends to one side of the through hole. The contact switch 52 is located in the rotation path of the roller 53. Thus, when the movable clamp 22 moves towards the fixed clamp 21 to clamp the wire rope 6 under the push of the hook plate 31, the movable clamp 22 will be pushed by the linkage between the reset guide post 42 and the movable clamp 22. When the reset guide post 42 and the measuring plate 45 move to the left, the measuring plate 45 will simultaneously push the roller 53 mounted on it upwards. During the upward movement, it will touch the contact switch 52, temporarily breaking the safety circuit. When a reset is required, the reset rod 44 is inserted into the reset hole 43, pushing the movable clamp 22 to the right to release the wire rope 6. At this time, due to the insertion of the reset rod 44, the reset top block 41 at the top of the reset rod 44 moves to the other end of the fixed seat 2, while the upper end of the limit head 441 still abuts against the roller 53, and the safety circuit remains in the open state. Only when the reset rod 44 is removed will the roller 53 reset and continue to be mounted on the measuring plate 45. This can effectively prevent the user from forgetting to reset the reset rod 44, and also has a certain safety function. The reset rod 44 is only pulled out when the movable clamp 22 and the braking mechanism 11 are successfully reset. After the contact switch is not in contact with any structure, the safety circuit is restored.

[0043] Compared to the original mechanism, this example has the following advantages: First, it eliminates the need for additional structures to control the switch. The movement of the movable clamp 22 pushes the measuring plate 45 to open the contact switch 52, thus disconnecting the circuit. Second, it provides double protection: after the movable clamp 22 and hook plate 31 have reset and it is confirmed that there are no problems, the reset rod 44 can be pulled out without the situation where the movable clamp 22 and hook plate 31 have not fully reset, but the safety circuit remains open. Third, it helps workers remove the reset rod 44 without it falling into the limit hole 47, thus preventing any impact on subsequent work.

[0044] The switching mechanism is mounted on the side wall of the speed governor housing 1 via the switch body 51. The reset lever 44 is also mounted on the outside of the speed governor housing 1.

[0045] A thrust bearing is provided inside the reset top block 41; it is used to limit the movement of the reset rod 44 and avoid friction between the surface of the reset rod 44 and the reset top block 41.

[0046] In summary, the automatic reset type elevator speed governor of this application resets the top block 41 in the fixed clamp 21. When the reset top block 41 is pushed, the reset guide post 42 on it pushes the movable clamp 22 to reset. At the same time, the reset rod 44 touches the contact switch 52, realizing the disconnection state of the safety circuit and achieving double protection. In addition, the reset top block 41 can also be quickly reset under the action of the spring, waiting for the next use.

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic reset type elevator speed governor, comprising a speed governor housing, a braking mechanism disposed within the speed governor housing, a connecting rod, and a rope clamping component, wherein the braking mechanism detects the speed state of the elevator wire rope and triggers the connecting rod to actuate according to the speed, the connecting rod is connected to and triggers the rope clamping component to actuate, the rope clamping component includes a fixed clamp and a movable clamp, the opposite end faces of the fixed clamp and the movable clamp are each provided with a clamping groove for the elevator wire rope to pass through, and the connecting rod is connected to and linked with the movable clamp, characterized in that... The fixed chuck is equipped with a horizontally movable reset top block. The reset top block contains a reset guide post, one end of which extends into the movable chuck. The end of the reset guide post that inserts into the movable chuck's limiting hole is connected to the movable chuck. Limiting holes are formed on opposite end faces of both the reset top block and the movable chuck, corresponding to the reset guide post. A reset spring is sleeved on the reset guide post, with both ends inserted into the limiting holes of the reset top block and the movable chuck, respectively. The reset top block and the fixed chuck are provided with reset holes for a reset rod to pass through. The limiting holes and the reset holes on the reset top block are blind holes. A reset rod for resetting the movable chuck is also included. When the reset top block moves towards the movable chuck, the reset spring on the reset guide post... When the reset rod is pulled out, the reset spring returns, and the reset top block automatically resets. The end of the reset guide post extending out of the speed governor housing is connected to the measuring plate. The measuring plate and the speed governor housing are also provided with through holes for the reset rod to pass through. A switch mechanism for monitoring the mechanical action of the speed governor is provided above the measuring plate. The switch mechanism controls the opening and closing of the elevator safety circuit. The switch mechanism is connected to the side wall of the speed governor housing. The switch mechanism includes a switch body, a contact switch and a roller provided on the end face of the switch body. The roller is connected to the switch body through a swing arm. One end of the swing arm is hinged to the end face where the contact switch is located, and the other end rests on the upper face of the measuring plate. The roller is located within the horizontal projection range of the through hole of the measuring plate.

2. The automatic reset type elevator speed governor according to claim 1, characterized in that, One end of the reset guide post is inserted into the movable clamp and connected to the movable clamp.

3. The automatic reset type elevator speed governor according to claim 1, characterized in that, At least two reset guide posts are provided, which pass through the fixing clamp and the speed limiter housing in sequence and extend out of the speed limiter housing.

4. The automatic reset type elevator speed governor according to claim 1, characterized in that, The reset top block is located in the groove on the side of the fixed clamp near the movable clamp, and the reset top block is provided with a clearance groove corresponding to the position of the elevator wire rope.

5. The automatic reset type elevator speed governor according to claim 1, characterized in that, With the reset rod inserted into the reset top block, the outer peripheral surface of the rear end of the reset rod abuts against the roller.

Images