Lifting mechanism for elevator and elevator

Abstract

The lifting mechanism comprises a limiting seat arranged on a cross beam of a lift car, a synchronous rod is arranged on the limiting seat, a trigger swing arm and a speed limiting connecting arm are arranged at the end of the synchronous rod, the trigger swing arm is connected with safety tongs, and the speed limiting connecting arm is connected with a speed limiting steel wire rope; the safety tongs are matched with the limiting sliding rail and comprise a tongs body, a fixed brake pad and a movable brake pad, the fixed brake pad and the movable brake pad are oppositely arranged in the tongs body, the movable brake pad is connected with the tongs body through a sliding seat, and a connecting pin is arranged at the bottom end of the movable brake pad; the trigger swing arm is provided with a sliding groove, and the connecting pin is arranged in the sliding groove and can slide relative to the sliding groove. Correspondingly, the invention further discloses an elevator. When the speed of the lift car exceeds the maximum preset value, the safety tongs can be quickly triggered, so that the lift car is gradually decelerated, and the safety of personnel in the lift car under extreme conditions is ensured.

Description

Technical Field

[0001] The invention relates to the field of elevator design, and in particular to a lifting mechanism for an elevator and an elevator. Background Art

[0002] As a special equipment, elevators are often equipped with different safety protection devices to maximize the safety of passengers in extreme situations. For elevators equipped with overspeed protection, when the elevator is overspeeding, the speed limiter detects the overspeed action and pulls the lifting mechanism through the wire rope. The lifting mechanism pulls the safety clamp to stop the car. The existing lifting mechanism is arranged at the top or bottom of the car, and the safety clamp is independently arranged at the bottom of the car. The lifting mechanism is connected to the safety clamp through a wire rope or a transmission mechanism. The safety clamp needs to occupy a large space, and the lifting mechanism needs to be connected to the safety clamp through a wire rope or multiple transmission parts of the transmission mechanism. The transmission resistance is large and the action is delayed. It cannot respond quickly when the elevator is overspeeding, and the braking action is often triggered only when the elevator reaches a higher speed. Summary of the invention

[0003] In order to solve the defects of the prior art, the present invention provides a lifting mechanism for an elevator and an elevator, which can quickly trigger the safety clamp when the speed of the car exceeds a maximum preset value, thereby gradually slowing down the car and ensuring the safety of people in the car under extreme conditions.

[0004] In order to solve the above technical problems, the present invention provides a lifting mechanism for an elevator, including a limit seat arranged on a crossbeam of a car, the limit seat is provided with a synchronization rod, the end of the synchronization rod is provided with a trigger swing arm and a speed limiting connecting arm, the trigger swing arm is connected to the safety clamp, and the speed limiting connecting arm is connected to the speed limiting wire rope; the safety clamp is arranged in cooperation with the limit slide rail, including a clamp body, a fixed brake pad and a movable brake pad, the fixed brake pad and the movable brake pad are arranged in the clamp body facing each other, the movable brake pad is connected to the clamp body through a sliding seat, and a connecting pin is provided at the bottom end; the trigger swing arm is provided with a sliding groove, the connecting pin is arranged in the sliding groove, and can slide relative to the sliding groove.

[0005] As an improvement of the above-mentioned scheme, the speed limiting connecting arm includes a first swing arm, an upper connecting plate and a lower connecting plate, one end of the first swing arm is fixedly connected to the synchronization rod, and the upper side of the other end is provided with an upper connecting plate, and the lower side is provided with a lower connecting plate; the upper connecting plate is connected to one end of the speed limiting steel wire rope, and the lower connecting plate is connected to the other end of the speed limiting steel wire rope.

[0006] As an improvement of the above scheme, it also includes a speed limiting wheel, a speed limiter and a tensioning wheel. The speed limiting steel wire rope can move in a circular motion, with the upper part bypassing the speed limiting wheel and the lower part bypassing the tensioning wheel. The speed limiter is connected to the speed limiting wheel to limit the maximum rotation speed of the speed limiting wheel.

[0007] As an improvement of the above solution, the car is also provided with a vertical beam, which is connected to the horizontal beam, and the two side edges of the vertical beam are bent outward to form a reinforced edge; a receiving groove is formed between the reinforced edges on both sides of the vertical beam; and the safety clamp is arranged in the receiving groove.

[0008] As an improvement of the above solution, the reinforced edge has a strip hole, and the trigger swing arm passes through the strip hole and is connected to the safety clamp.

[0009] As an improvement of the above solution, the fixed brake pad is vertically arranged, the sliding seat has an inclined sliding groove, the movable brake pad has a sliding connection portion matching the inclination of the sliding groove, and the surface of the movable brake pad facing the fixed brake pad is a vertically arranged friction surface.

[0010] As an improvement of the above solution, trigger swing arms are provided at both ends of the synchronization rod, safety clamps are provided in the vertical beams on both sides, and the trigger swing arms are connected to the safety clamps arranged on the same side.

[0011] As an improvement of the above solution, a torsion spring is provided on the synchronization rod.

[0012] As an improvement of the above scheme, the bottom end of the vertical beam is connected to the base plate, and a traction pulley is provided at the bottom of the base plate; in a normal state, the trigger swing arm is in a horizontal state, and the sliding groove is gradually tilted downward from the end close to the synchronization rod to the end away from the synchronization rod.

[0013] Correspondingly, the present invention also provides an elevator, which is provided with the lifting mechanism for the elevator as described above.

[0014] The implementation of the present invention has the following beneficial effects: With the above structure, the speed limiting steel wire rope is connected to the synchronization rod through the speed limiting connecting arm. When the rising speed of the car exceeds the maximum preset value, the speed limiting steel wire rope generates additional pulling force on the speed limiting connecting arm, driving the synchronization rod to rotate. The synchronization rod drives the movable brake pad to move toward the fixed brake pad by triggering the swing arm, clamping the limit slide rail, thereby gradually slowing down the car and ensuring the safety of people in the car under extreme conditions.

[0015] The safety clamp is arranged in the vertical beam, so that the car can be decelerated by using the limit slide rail for guiding the car, which simplifies the structure of the car and makes maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a lifting mechanism for an elevator according to an embodiment of the invention; Figure 2It is a schematic diagram of the assembly structure of a synchronization rod, a trigger swing arm, a speed limiting connecting arm and a safety clamp according to an embodiment of the invention; Figure 3 It is a schematic diagram of the assembly structure of the synchronization rod, the trigger swing arm, the speed limiting connecting arm and the safety gear from another perspective of an embodiment of the invention; Figure 4 It is a side view structural diagram of a lifting mechanism for an elevator according to an embodiment of the invention; DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0018] like Figure 1-Figure 4 As shown, the first embodiment of the present invention provides a lifting mechanism for an elevator, including a limit seat 2 arranged on a cross beam 1 of a car, a synchronization rod 3 is arranged on the limit seat 2, and a trigger swing arm 4 and a speed limiting connecting arm 5 are arranged at the end of the synchronization rod 3, the trigger swing arm 4 is connected to a safety clamp 6, and the speed limiting connecting arm 5 is connected to a speed limiting wire rope 7; the safety clamp 6 is arranged in cooperation with a limit slide rail 66, including a clamp body 61, a fixed brake pad 62 and a movable brake pad 63, the fixed brake pad 62 and the movable brake pad 63 are arranged in the clamp body 61 facing each other, the movable brake pad 63 is connected to the clamp body 61 through a sliding seat 64, and a connecting pin 65 is arranged at the bottom end; the trigger swing arm 4 is provided with a sliding groove 41, and the connecting pin 65 is arranged in the sliding groove 41 and can slide relative to the sliding groove 41.

[0019] With the above structure, the speed limiting steel wire rope 7 is connected to the synchronization rod 3 through the speed limiting connecting arm 5. When the rising speed of the car exceeds the maximum preset value, the speed limiting steel wire rope 7 generates additional pulling force on the speed limiting connecting arm 5, driving the synchronization rod 3 to rotate. The synchronization rod 3 drives the movable brake pad 63 to move toward the fixed brake pad 62 by triggering the swing arm 4, clamping the limiting slide rail 66, thereby gradually slowing down the car and ensuring the safety of people in the car under extreme conditions.

[0020] Preferably, the speed limiting connecting arm 5 comprises a first swing arm 51, an upper connecting plate 52 and a lower connecting plate 53, one end of the first swing arm 51 is fixedly connected to the synchronization rod 3, the upper side of the other end is provided with an upper connecting plate 52, and the lower side is provided with a lower connecting plate 53; the upper connecting plate 52 is connected to one end of the speed limiting steel wire rope 7, and the lower connecting plate 53 is connected to the other end of the speed limiting steel wire rope 7. With the above structure, when the speed limiting steel wire rope 7 generates additional tension, a large torque can be generated on the synchronization rod 3 through the first swing arm 51, causing the synchronization rod 3 to twist, thereby driving the safety clamp 6 to operate, simplifying the connection structure with the speed limiting steel wire rope 7, and being safe and reliable.

[0021] Specifically, in order to trigger the safety clamp 6 in time when the car is overspeeding, the lifting mechanism also includes a speed limiting wheel 71, a speed limiter 72 and a tensioning wheel 73. The speed limiting wire rope 7 can move cyclically, bypassing the speed limiting wheel 71 at the upper part and bypassing the tensioning wheel 73 at the lower part. The speed limiter 72 is connected to the speed limiting wheel 71 to limit the maximum rotation speed of the speed limiting wheel 71. The speed limiter 72 can adopt the bidirectional speed limiter 72 commonly used in the elevator industry. When the lifting speed of the car is too fast, the speed limiting wire rope 7 and the speed limiting wheel 71 are driven to move at the same speed. The speed limiter 72 will apply additional resistance to the speed limiting wheel 71, so that the speed of the speed limiting wheel 71 slows down, and the speed limiting wire rope 7 generates additional tension on the speed limiting connecting arm 5, thereby triggering the safety clamp 6.

[0022] In order to further simplify the structure of the lifting mechanism, the car is further provided with a vertical beam 8, the vertical beam 8 is connected to the horizontal beam 1, and the edges of the vertical beam 8 are bent outward to form a reinforcement edge 81; a receiving groove 82 is formed between the reinforcement edges 81 on both sides of the vertical beam 8; the safety clamp 6 is arranged in the receiving groove 82. The reinforcement edge 81 can increase the strength of the vertical beam 8, making the structure of the car more solid. The safety clamp 6 is arranged in the vertical beam 8, so that it can use the limit slide rail 66 for guiding the car to slow down the car, simplifying the structure of the car and making maintenance more convenient.

[0023] The trigger mechanism of the current lifting mechanism often transmits the driving force to the safety clamp 6 through a steel wire or multiple transmission parts, which is complex in structure and involves many parts. The reinforcing edge 81 of the lifting mechanism of the present application has a bar hole 83, and the trigger swing arm 4 passes through the bar hole 83 and is directly connected to the safety clamp 6. The bar hole 83 reserves enough space for the swing of the trigger swing arm 4.

[0024] In order to stop the car in time when the overspeed protection action is triggered, the fixed brake pad 62 is arranged vertically, the sliding seat 64 has an inclined slide groove 641, the movable brake pad 63 has a sliding connection part 631 matching the inclination of the slide groove 641, and the surface of the movable brake pad 63 facing the fixed brake pad 62 is a vertically arranged friction surface 632. It should be noted that the fixed brake pad 62 and the movable brake pad 63 of the above structure will move outward synchronously until they contact with the limit slide rail 66 when the movable brake pad 63 is driven by the trigger swing arm 4 to slide upward along the sliding seat 64, and the lifting force of the movable brake pad 63 is further increased under the friction force of the limit slide rail 66, so that the safety clamp 6 is self-locked under the condition of low trigger force, and the car gradually decelerates until it is completely stopped.

[0025] In order to provide sufficient and balanced resistance for the car when the safety clamp 6 is triggered, trigger swing arms 4 are provided at both ends of the synchronization rod 3, and safety clamps 6 are provided in the vertical beams 8 on both sides, and the trigger swing arms 4 are connected to the safety clamps 6 provided on the same side. The synchronization rod 3 is used to ensure that the safety clamps 6 on both sides act synchronously.

[0026] In order to ensure that the safety clamp 6 will not be accidentally triggered when the car does not exceed the maximum speed limit, a torsion spring 9 is provided on the synchronization rod 3. The torsion spring 9 provides a constant torque for the synchronization rod 3 to ensure that the synchronization rod 3 will not trigger the safety clamp 6 due to the normal resistance of the speed limiting wheel 71, the speed limiter 72 and the tensioning wheel 73 when the car is normally raised and lowered and the speed limiting wire rope 7 is driven.

[0027] In order to enable the trigger swing arm 4 to drive the safety clamp 6 in a more labor-saving manner in time when the speed limiter 72 is activated, the bottom end of the vertical beam 8 is connected to the bottom plate 10, and a traction pulley 11 is provided at the bottom of the bottom plate 10; in a normal state, the trigger swing arm 4 is in a horizontal state, and the sliding groove 41 is gradually tilted downward from the end close to the synchronization rod 3 to the end away from the synchronization rod 3. By keeping the trigger swing arm 4 in a horizontal state when the car is normally lifted and lowered, and making the sliding groove 41 gradually tilted downward from the end close to the synchronization rod 3 to the end away from the synchronization rod 3, when the speed limiter 72 causes the trigger swing arm 4 to swing upward through the synchronization rod 3, the downward tilted sliding groove 41 has the effect of labor-saving on the inclined surface, and uses the lever principle to drive the movable brake pad 63 that may have a large resistance due to long-term non-triggered, ensuring that the safety clamp 6 that has been on standby for many years can still be quickly started and work stably as expected in an emergency.

[0028] Correspondingly, the second embodiment of the present invention further provides an elevator, which is provided with the lifting mechanism for the elevator as described above.

[0029] In the elevator adopting the above structure, the speed limiting wire rope 7 is connected to the synchronization rod 3 through the speed limiting connecting arm 5. When the rising speed of the car exceeds the maximum preset value, the speed limiting wire rope 7 generates additional pulling force on the speed limiting connecting arm 5, driving the synchronization rod 3 to rotate. The synchronization rod 3 drives the movable brake pad 63 to move toward the fixed brake pad 62 by triggering the swing arm 4, clamping the limiting slide rail 66, thereby gradually slowing down the car to ensure the safety of people in the car under extreme conditions.

[0030] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A lifting mechanism for an elevator, characterized in that: It comprises a limit seat arranged on the cross beam of the car, the limit seat is provided with a synchronization rod, the end of the synchronization rod is provided with a trigger swing arm and a speed limiting connecting arm, the trigger swing arm is connected to the safety clamp, and the speed limiting connecting arm is connected to the speed limiting wire rope; The safety clamp is arranged in cooperation with the limit slide rail, and comprises a clamp body, a fixed brake pad and a movable brake pad, wherein the fixed brake pad and the movable brake pad are arranged in the clamp body facing each other, and the movable brake pad is connected to the clamp body through a sliding seat, and a connecting pin is arranged at the bottom end; The trigger swing arm is provided with a sliding groove, and the connecting pin is arranged in the sliding groove and can slide relative to the sliding groove.

2. The lifting mechanism for an elevator according to claim 1, characterized in that: The speed limiting connecting arm includes a first swing arm, an upper connecting plate and a lower connecting plate. One end of the first swing arm is fixedly connected to the synchronization rod, and the other end is provided with an upper connecting plate on the upper side and a lower connecting plate on the lower side; the upper connecting plate is connected to one end of the speed limiting steel wire rope, and the lower connecting plate is connected to the other end of the speed limiting steel wire rope.

3. The lifting mechanism for an elevator according to claim 2, characterized in that: It also includes a speed limiting wheel, a speed limiter and a tensioning wheel. The speed limiting steel wire rope can move cyclically, with the upper part bypassing the speed limiting wheel and the lower part bypassing the tensioning wheel. The speed limiter is connected to the speed limiting wheel to limit the maximum rotation speed of the speed limiting wheel.

4. The lifting mechanism for an elevator according to claim 1, characterized in that: The car is also provided with a vertical beam, which is connected to the horizontal beam. The edges of both sides of the vertical beam are bent outward to form a reinforced edge. A receiving groove is formed between the reinforced edges on both sides of the vertical beam. The safety clamp is arranged in the receiving groove.

5. The lifting mechanism for an elevator according to claim 4, characterized in that: The reinforced edge has a strip hole, and the trigger swing arm passes through the strip hole and is connected to the safety clamp.

6. The lifting mechanism for an elevator according to claim 5, characterized in that: The fixed brake pad is vertically arranged, the sliding seat has an inclined sliding groove, the movable brake pad has a sliding connection portion matching the inclination of the sliding groove, and the surface of the movable brake pad facing the fixed brake pad is a vertically arranged friction surface.

7. The lifting mechanism for an elevator according to claim 4, characterized in that: Both ends of the synchronization rod are provided with trigger swing arms, and safety clamps are provided in the vertical beams on both sides. The trigger swing arms are connected to the safety clamps arranged on the same side.

8. The lifting mechanism for an elevator according to claim 1, characterized in that: A torsion spring is arranged on the synchronization rod.

9. The lifting mechanism for an elevator according to claim 6, characterized in that: The bottom end of the vertical beam is connected to the bottom plate, and a traction pulley is provided at the bottom of the bottom plate; in a normal state, the trigger swing arm is in a horizontal state, and the sliding groove is gradually tilted downward from an end close to the synchronization rod to an end away from the synchronization rod.

10. An elevator, characterized in that: A lifting mechanism for an elevator as described in any one of claims 1 to 9 is provided.

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