Double safety tong synchronous lifting mechanism

Abstract

The application discloses a double safety tongs synchronous lifting mechanism, which comprises two supports, two rotating shafts, a linkage rod, safety tongs and the like.

Description

Technical Field

[0001] This invention belongs to the field of elevator technology, specifically relating to a dual safety clamp synchronous lifting mechanism. Background Technology

[0002] Currently, elevators primarily use a speed limiter-safety clamp system for stall protection. This system continuously monitors and controls the car's speed. When overspeed occurs (i.e., 115% of the elevator's rated speed), it promptly sends a signal, triggering a mechanical action to cut off the power supply circuit and brake the traction mechanism. If the elevator still cannot brake, the safety clamp installed at the bottom of the car will activate and forcibly stop the car.

[0003] Existing elevators typically have only one safety clamp on one side, such as the safety clamp lifting mechanism and its safety clamp disclosed in patent publication number CN219489283U. However, the safety of having only one safety clamp on one side is relatively low. Summary of the Invention

[0004] The purpose of this invention is to provide a dual safety clamp synchronous lifting mechanism that can drive four safety clamps to work simultaneously, resulting in high safety.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dual safety clamp synchronous lifting mechanism, comprising: Two supports, which are arranged in parallel; Two rotating shafts are rotatably connected between two brackets. A trigger rod is fixed on one of the rotating shafts. The trigger rod and the trigger element are connected to the speed limiter wire rope. A fixing rod is fixed on each of the rotating shafts. A linkage rod, one end of which is hinged to one of the fixed linkage rods, and the other end of which is hinged to the other fixed linkage rod; The safety clamp includes four clamps, each mounted on one of the four ends of two supports. Each clamp includes a clamp body fixed to one end of the support. The clamp body has a lifting slide groove and two upward-facing vertical slide grooves located on opposite sides of the lifting slide groove. A vertical slide rod is inserted into each vertical slide groove. A lifting push rod and a side push rod are hinged to the upper end of each vertical slide rod. A lifting plate is hinged to the lifting push rod and fixed to the rotating shaft. Clamping slide grooves are provided on both the left and right sides of the lifting slide groove. Clamping blocks are installed within each clamping slide groove. A connecting groove is provided on the bottom surface of each clamping slide groove. An extension rod extending out of the connecting groove is fixed to each clamping block. A side vertical rod is fixed to one end of the extension rod extending out of the connecting groove, and the upper end of the side vertical rod is hinged to a corresponding side push rod.

[0006] Furthermore, the clamping block is provided with a plurality of blocking grooves with openings facing the lifting slide groove. The blocking grooves are arranged sequentially along the vertical direction of the clamping block. Each blocking groove is provided with a blocking component, which includes a blocking block and a blocking spring. The blocking block is installed in the blocking groove. The bottom surface of the blocking groove is provided with a blocking through hole. A blocking rod extending out of the blocking through hole is fixed on the blocking block. A blocking fixing plate is fixed to one end of the blocking rod extending out of the blocking through hole. The blocking spring is sleeved on the blocking rod. The blocking spring is located between the bottom surface of the blocking groove and the blocking block. The distances of the blocking blocks extending out of the blocking groove increase sequentially from top to bottom.

[0007] Furthermore, a rear slide groove is provided on the rear side of the lifting slide groove, an auxiliary block is inserted into the rear slide groove, two rear hinge rods are hinged to the rear end of the auxiliary block, and a rear connecting rod is hinged to the rear hinge rod. The two rear connecting rods are respectively fixedly connected to the two extension rods.

[0008] Furthermore, the linkage rod includes a linkage shaft, two linkage brackets, and four linkage nuts. Both ends of the linkage shaft are provided with linkage external threads, and the linkage brackets are provided with linkage through holes. Both ends of the linkage shaft pass through the linkage through holes of the two linkage brackets respectively. Each linkage external thread is threaded with two linkage nuts. The two corresponding linkage nuts are respectively arranged on both sides of the linkage bracket, and the two linkage brackets are respectively hinged to the fixed connecting rod.

[0009] Furthermore, the bracket is fixed to the elevator car, and a photoelectric transmitter and a photoelectric receiver are fixed to the upper side of one of the clamp bodies. A light-transmitting hole is provided on one of the vertical slide rods on the clamp body. The photoelectric transmitter and the photoelectric receiver are respectively located on both sides of the light-transmitting hole. A detection bracket is fixed to the lower end of the inner wall of the elevator shaft, and a detection rod is fixed to the upper end of the vertical slide rod. The detection rod is located above the detection bracket. When the elevator car moves to the bottom of the shaft, the detection rod contacts the detection bracket, and the detection bracket drives the detection rod to move upward. The photoelectric receiver receives the signal emitted by the photoelectric transmitter.

[0010] Furthermore, three blocking grooves are provided.

[0011] Furthermore, it also includes a return spring, which is sleeved on the rotating shaft and fixed between the bracket and the lifting plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are: (1) After the trigger rod rotates, it can drive two rotating shafts to rotate at the same time, thereby realizing the simultaneous braking of four safety clamps, which has a good braking effect and high safety. (2) Before the clamping block brings the car to an emergency stop, each blocking block decelerates the car step by step, making the emergency stop process of the car smoother; (3) When the clamping block clamps the protrusion of the guide rail, the auxiliary block also contacts the protrusion of the guide rail, which can also play a clamping role, and the emergency stop effect is better. (4) The photoelectric transmitter and photoelectric receiver can detect whether the dual safety clamp synchronous lifting mechanism can operate normally, and avoid the situation where the dual safety clamp synchronous lifting mechanism cannot move normally due to parts jamming or rusting after a long period of non-use, which is not discovered by maintenance personnel. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the dual safety clamp synchronous lifting mechanism of the present invention; Figure 2 for Figure 1 A magnified view of a section at point I; Figure 3 for Figure 1 Top view; Figure 4 for Figure 3 Cross-sectional view at point AA; Figure 5 for Figure 4 Enlarged view of section II in the middle; Figure 6 for Figure 5 A magnified view of a section at point III; Figure 7 for Figure 2 Another structural diagram from another angle; Figure 8 This is a schematic diagram of the linkage mechanism; Figure 9 This is a schematic diagram showing the dual safety clamp synchronous lifting mechanism connected to the guide rail.

[0014] In the diagram: 1. Bracket; 2. Rotating shaft; 3. Trigger rod; 4. Fixed connecting rod; 5. Linkage rod; 6. Clamp body; 7. Lifting slide; 8. Vertical slide; 9. Vertical slide bar; 10. Lifting push rod; 11. Side push rod; 12. Lifting plate; 13. Clamping slide; 14. Clamping block; 15. Connecting groove; 16. Extension rod; 17. Side vertical rod; 18. Blocking slide; 19. Blocking block; 20. Blocking spring; 21. Blocking through hole; 22. Blocking through rod; 23. Blocking fixing plate; 24. Rear slide; 25. Auxiliary block; 26. Rear hinge rod; 27. Rear connecting rod; 28. Linkage shaft; 29. ​​Linkage bracket; 30. Linkage nut; 31. Photoelectric transmitter; 32. Photoelectric receiver; 33. Light-transmitting hole; 34. Detection bracket; 35. Detection rod; 36. Linkage external thread; 37. Return spring; 38. Guide rail. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0016] Please see Figures 1-9 This invention provides a technical solution for a dual safety clamp synchronous lifting mechanism.

[0017] A dual-safety-clamp synchronous lifting mechanism, comprising: Two brackets 1 are set in parallel; Two rotating shafts 2 are rotatably connected between two brackets 1. One of the rotating shafts 2 is fixed with a trigger rod 3. The trigger rod 3 is connected to the trigger element and the speed limiter wire rope. Each rotating shaft 2 is fixed with a fixing rod 4. Linkage rod 5, one end of which is hinged to one of the fixed linkage rods 4, and the other end of which is hinged to another fixed linkage rod 4; The safety clamps consist of four clamps, each mounted at one end of one of the two supports 1. Each clamp is a double safety clamp on one side. The clamp body 6 is fixed to the end of the support 1. The clamp body 6 has a lifting slide groove 7 and two upward-facing vertical slide grooves 8 located on either side of the lifting slide groove 7. Vertical slide rods 9 are inserted into the vertical slide grooves 8, and a lifting push rod 10 and a side push rod 1 are hinged to the upper end of the vertical slide rods 9. 1. A lifting plate 12 is hinged to the lifting push rod 10. The lifting plate 12 is fixed on the rotating shaft 2. Clamping grooves 13 are provided on both the left and right sides of the lifting slide 7. Clamping blocks 14 are installed in the clamping grooves 13. A connecting groove 15 is provided on the bottom surface of the clamping groove 13. An extension rod 16 extending out of the connecting groove 15 is fixed on the clamping block 14. A side vertical rod 17 is fixed at one end of the extension rod 16 extending out of the connecting groove 15. The upper end of the side vertical rod 17 is hinged to the corresponding side push rod 11.

[0018] A dual safety clamp synchronous lifting mechanism is installed below the elevator car. The inner wall of the elevator shaft is fixed with a guide rail 38 corresponding to the safety clamp. The protrusion of the guide rail 38 is inserted into the lifting slide 7, thereby guiding the car to move up and down. When the speed of the car exceeds the set speed of the speed limiter, the trigger rod 3 drives the rotating shaft 2 connected to it to rotate. This rotating shaft 2 drives another rotating shaft 2 to rotate through the fixed connecting rod 4 and the linkage rod 5. The rotation of the rotating shaft 2 can drive the lifting plate 12 to rotate. The rotation of the lifting plate 12 can drive the vertical slide rod 9 to move upward through the lifting push rod 10. The upward movement of the vertical slide rod 9 can drive the clamping block 14 to move to the protrusion of the guide rail 38 through the side push rod 11, the side vertical rod 17 and the extension rod 16, thereby clamping the two clamping blocks 14 on the protrusion of the guide rail 38, realizing the emergency stop of the car and preventing the car from falling.

[0019] With the above structure, the trigger rod 3 can drive the two rotating shafts 2 to rotate at the same time after rotation, thereby realizing the simultaneous braking of the four safety clamps, which has a good braking effect and high safety.

[0020] like Figure 6 As shown, the clamping block 14 is provided with several blocking grooves 18 with openings facing the lifting slide groove 7. In this embodiment, there are three blocking grooves 18. The blocking grooves 18 are arranged sequentially along the vertical direction of the clamping block 14. Each blocking groove 18 is provided with a blocking component, including a blocking block 19 and a blocking spring 20. The blocking block 19 is installed in the blocking groove 18. The bottom surface of the blocking groove 18 is provided with a blocking through hole 21. A blocking rod 22 extending out of the blocking through hole 21 is fixed on the blocking block 19. A blocking fixing plate 23 is fixed at one end of the blocking rod 22 extending out of the blocking through hole 21. The blocking spring 20 is sleeved on the blocking rod 22. The blocking spring 20 is located between the bottom surface of the blocking groove 18 and the blocking block 19. The distance of the several blocking blocks 19 extending out of the blocking groove 18 increases sequentially from top to bottom.

[0021] When the car's speed exceeds the speed limiter's set speed, the clamping block 14 inside the safety clamp is triggered to move towards the protrusion of the guide rail 38. During this movement, the lowermost blocking block 19 first contacts the protrusion of the guide rail 38, compressing the blocking spring 20 connected to it. This blocking block 19 provides a certain degree of deceleration to the car. Then, the auxiliary block 25 continues to move towards the protrusion of the guide rail 38, and the second-to-last blocking block 19 also contacts the protrusion, continuing to decelerate the car. The elastic coefficient of the blocking spring 20 on this blocking block 19 is greater than that of the lower blocking spring 20, resulting in a greater deceleration effect. Similarly, the uppermost blocking block 19 also provides deceleration until the clamping block 14 clamps onto the protrusion of the guide rail 38. Therefore, before the clamping block 14 brings the car to an emergency stop, each blocking block 19 decelerates the car in stages, making the emergency stop process smoother.

[0022] In addition, such as Figure 2 and Figure 7 As shown, to enhance the emergency stop effect, a rear slide 24 is provided on the rear side of the lifting slide 7. An auxiliary block 25 is inserted into the rear slide 24. Two rear hinge rods 26 are hinged to the rear end of the auxiliary block 25. A rear connecting rod 27 is hinged to the rear hinge rod 26. The two rear connecting rods 27 are fixedly connected to the two extension rods 16 respectively. During the upward movement of the vertical slide rod 9, the auxiliary block 25 moves to the side of the guide rail 38 through the side push rod 11, the side vertical rod 17, the rear connecting rod 27, and the rear hinge rod 26. When the clamping block 14 clamps the protrusion of the guide rail 38, the auxiliary block 25 also contacts the protrusion of the guide rail 38, which can also play a clamping role, resulting in a better emergency stop effect.

[0023] like Figure 8 As shown, the linkage 5 includes a linkage shaft 28, two linkage brackets 29, and four linkage nuts 30. Both ends of the linkage shaft 28 are provided with external linkage threads 36. The linkage brackets 29 are provided with linkage through holes, and both ends of the linkage shaft 28 pass through the linkage through holes of the two linkage brackets 29 respectively. Each external linkage thread 36 is threaded with two linkage nuts 30, and the two corresponding linkage nuts 30 are respectively located on both sides of the linkage bracket 29. The two linkage brackets 29 are hinged to the fixed linkage 4. The position of the linkage bracket 29 can be adjusted by rotating the linkage nuts 30, thus facilitating the installation of the linkage 5.

[0024] like Figure 2 and Figure 5As shown, bracket 1 is fixed to the elevator car. A photoelectric transmitter 31 and a photoelectric receiver 32 are fixed on the upper side of one of the clamp bodies 6. A light-transmitting hole 33 is provided on one of the vertical slide rods 9 on the clamp body 6. The photoelectric transmitter 31 and the photoelectric receiver 32 are located on both sides of the light-transmitting hole 33. A detection bracket 34 is fixed to the lower end of the inner wall of the elevator shaft. A detection rod 35 is fixed to the upper end of the vertical slide rod 9. The detection rod 35 is located above the detection bracket 34. When the elevator car moves to the bottom of the shaft, the detection rod 35 contacts the detection bracket 34. The detection bracket 34 drives the detection rod 35 to move upward. The photoelectric receiver 32 receives the signal emitted by the photoelectric transmitter 31.

[0025] To ensure the proper functioning of the dual safety clamp synchronous lifting mechanism and prevent unnoticed malfunctions such as component jamming or other issues, the elevator car periodically travels to the bottom of the shaft. During this process, the detection rod 35 contacts the detection bracket 34, which in turn moves the vertical slide rod 9 upwards until the light-transmitting hole 33 is in the light-transmitting position. At this point, the signal emitted by the photoelectric transmitter 31 is received by the photoelectric receiver 32. Simultaneously, the clamping block 14 does not clamp the protrusion of the guide rail 38. The photoelectric receiver 32 receiving the signal indicates that the vertical slide rod 9 can move normally, and the dual safety clamp synchronous lifting mechanism is functioning correctly. This allows for periodic checks to ensure the dual safety clamp synchronous lifting mechanism is operating normally, preventing situations where components become jammed or rusted due to prolonged disuse, which may go unnoticed by maintenance personnel.

[0026] like Figure 2 As shown, the dual safety clamp synchronous lifting mechanism also includes a return spring 37, which is sleeved on the rotating shaft 2 and fixed between the bracket 1 and the lifting plate 12. During normal operation of the car, the return spring 37 is in a state free from external force, at which time the clamping block 14 is completely located within the clamping groove 13. When the clamping block 14 is clamped onto the guide rail 38, the return spring 37 is in a torsional state. When the speed limiter wire rope is released, the return spring 37 drives the clamping block 14 to return to its original position.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-safety-clamp synchronous lifting mechanism, characterized in that, include: Two supports, which are arranged in parallel; Two rotating shafts are rotatably connected between two brackets. A trigger rod is fixed on one of the rotating shafts. The trigger rod and the trigger element are connected to the speed limiter wire rope. A fixing rod is fixed on each of the rotating shafts. A linkage rod, one end of which is hinged to one of the fixed linkage rods, and the other end of which is hinged to the other fixed linkage rod; The safety clamp includes four clamps, each mounted at one of the four ends of two brackets. Each safety clamp comprises a clamp body fixed to one end of the bracket. The clamp body has a lifting slide groove and two upward-facing vertical slide grooves located on either side of the lifting slide groove. A vertical slide rod is inserted into the vertical slide groove. A lifting push rod and a side push rod are hinged to the upper end of the vertical slide rod. A lifting plate is hinged to the lifting push rod and the lifting plate is fixed on the rotating shaft. Clamping slide grooves are provided on both the left and right sides of the lifting slide groove. Clamping blocks are installed in the clamping slide grooves. A connecting groove is provided on the bottom surface of the clamping slide groove. An extension rod extending out of the connecting groove is fixed on the clamping block. A side vertical rod is fixed to one end of the extension rod extending out of the connecting groove. The upper end of the side vertical rod is hinged to the corresponding side push rod. The clamping block is provided with several blocking grooves with openings facing the lifting slide groove. The blocking grooves are arranged sequentially along the vertical direction of the clamping block. Each blocking groove is provided with a blocking component, which includes a blocking block and a blocking spring. The blocking block is installed in the blocking groove. The bottom surface of the blocking groove is provided with a blocking through hole. A blocking rod extending out of the blocking through hole is fixed on the blocking block. A blocking fixing plate is fixed to one end of the blocking rod extending out of the blocking through hole. The blocking spring is sleeved on the blocking rod and is located between the bottom surface of the blocking groove and the blocking block. The distances of the blocking blocks extending out of the blocking grooves increase sequentially from top to bottom.

2. The dual safety clamp synchronous lifting mechanism according to claim 1, characterized in that, The rear side of the lifting slide is provided with a rear slide groove, and an auxiliary block is inserted into the rear slide groove. Two rear hinge rods are hinged to the rear end of the auxiliary block, and a rear connecting rod is hinged to the rear hinge rod. The two rear connecting rods are respectively fixedly connected to the two extension rods.

3. The dual safety clamp synchronous lifting mechanism according to claim 1, characterized in that, The linkage rod includes a linkage shaft, two linkage brackets, and four linkage nuts. Both ends of the linkage shaft are provided with linkage external threads. The linkage brackets are provided with linkage through holes. Both ends of the linkage shaft pass through the linkage through holes of the two linkage brackets respectively. Each linkage external thread is threaded with two linkage nuts. The two corresponding linkage nuts are respectively located on both sides of the linkage bracket. The two linkage brackets are respectively hinged to the fixed linkage rod.

4. The dual safety clamp synchronous lifting mechanism according to claim 1, characterized in that, The bracket is fixed to the elevator car. A photoelectric transmitter and a photoelectric receiver are fixed to the upper side of one of the clamp bodies. A light-transmitting hole is provided on one of the vertical slide rods on the clamp body. The photoelectric transmitter and the photoelectric receiver are respectively located on both sides of the light-transmitting hole. A detection bracket is fixed to the lower end of the inner wall of the elevator shaft. A detection rod is fixed to the upper end of the vertical slide rod. The detection rod is located above the detection bracket. When the elevator car moves to the bottom of the shaft, the detection rod contacts the detection bracket. The detection bracket drives the detection rod to move upward. The photoelectric receiver receives the signal emitted by the photoelectric transmitter.

5. The dual safety clamp synchronous lifting mechanism according to claim 1, characterized in that, There are three blocking grooves.

6. The dual safety clamp synchronous lifting mechanism according to claim 1, characterized in that, It also includes a return spring, which is sleeved on the rotating shaft and fixed between the bracket and the lifting plate.

Images