Novel elevator two-way speed limiter

Abstract

The utility model discloses a novel elevator two-way speed limiter, which belongs to the field of elevator safety and comprises a support frame, a rope wheel, a two-way ratchet wheel, a two-way pawl, a safety switch and an electromagnet, wherein the rope wheel and the two-way ratchet wheel are rotationally installed in the supporting frame, and the two-way pawl is movably installed in the supporting frame and used for triggering to be matched with the two-way ratchet wheel to lock the rope wheel; the electromagnet is fixedly installed at the position, corresponding to one end of the two-way pawl, in the supporting frame and used for driving the two-way pawl to rotate so that the two-way pawl can be matched with the two-way ratchet wheel to lock the rope wheel. The safety switch is fixedly installed in the supporting frame corresponding to the end, away from the electromagnet, of the two-way pawl and used for making contact with the end, away from the electromagnet, of the two-way pawl. The bidirectional speed limiter for the elevator is simple in structure and convenient to use, the safety switch and the electromagnet are arranged in the supporting frame, and the risk that the safety switch and the electromagnet are collided and damaged can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of elevator safety, and in particular to a novel elevator bidirectional speed limiter. Background Art

[0002] The bidirectional speed limiter for machine room-less elevator is generally of cam pendulum type, which is usually composed of a frame, a rope wheel, a ratchet, a pawl, an electric switch, an actuating electromagnet, etc. When the car moves, the wire rope bypassing the speed limiter rope wheel will drive the rope wheel to rotate, and the rope wheel drives the cam fixed with it to rotate together, and the rubber wheel at one end of the pawl swings back and forth on the cam. When the movement speed of the car exceeds the preset range, the swing amplitude of the pawl becomes larger and larger. On the one hand, the switch contact rod on the pawl swings with the pawl. As the swing amplitude increases, it will trigger the electric switch and cut off the power supply of the traction machine; on the other hand, when the swing amplitude of the pawl increases and reaches a resonance with the cam, the claw at the other end of the pawl will collide and get stuck with the ratchet claw, thereby stopping the speed limiter rope wheel. The speed limiter wire rope and the rope wheel generate enough friction to make the wire rope pull the safety clamp mechanism, thereby stopping the safety clamp.

[0003] The Chinese utility model patent with publication number CN218453875U discloses an improved elevator speed limiter, which triggers a pawl by pushing a touch rod through an electromagnet installed on the outside of the support frame, and monitors the state of the pawl through a full switch setting outside the support frame. Although the triggering and state monitoring of the pawl can be achieved, the safety switch and the electromagnet are set outside the support frame and are easily damaged by collision, which affects the service life of the elevator speed limiter.

[0004] Therefore, the present application provides an elevator bidirectional speed limiter with a safety switch and an electromagnet built in to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The present application provides a novel elevator bidirectional speed limiter, which aims to solve the problem in the background technology that the existing elevator speed limiter safety switch and electromagnet are located outside the support frame and are easily damaged by collision.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a new type of elevator bidirectional speed limiter, comprising a support frame, a rope pulley, a bidirectional ratchet, a bidirectional pawl, a safety switch and an electromagnet; wherein the rope pulley and the bidirectional ratchet are rotatably installed inside the support frame, and the bidirectional pawl is movably installed inside the support frame to trigger and cooperate with the bidirectional ratchet to lock the rope pulley.

[0009] Among them, in order to reduce the risk of the safety switch and the electromagnet being damaged by collision and to increase the service life of the elevator's two-way speed limiter; the electromagnet is fixedly installed inside the support frame at a position corresponding to one end of the two-way pawl, and is used to drive the two-way pawl to rotate so that the two-way pawl cooperates with the two-way ratchet to lock the rope wheel; the safety switch is fixedly installed inside the support frame at a position corresponding to one end of the two-way pawl away from the electromagnet, and is used to contact the end of the two-way pawl away from the electromagnet; when the two-way pawl contacts the two-way ratchet, the end of the two-way pawl away from the electromagnet contacts the safety switch. In this way, placing the safety switch and the electromagnet inside the support frame can effectively trigger the two-way pawl to cooperate with the two-way ratchet to brake the rope wheel and monitor the action state of the two-way pawl, while reducing the risk of the safety switch and the electromagnet being damaged by external collision, thereby increasing the service life of the elevator speed limiter.

[0010] Preferably, a signal disk rotating with the rope wheel is fixedly mounted on the rope wheel, and two sensors corresponding to the signal disk are fixedly mounted on the support frame.

[0011] Preferably, the signal disk is provided with a plurality of through holes distributed in a ring array.

[0012] Preferably, the sensor is a photoelectric sensor.

[0013] Preferably, a connecting plate for supporting the safety switch and the electromagnet is fixedly installed inside the supporting frame.

[0014] Preferably, the connecting plate is located at a middle position inside one end of the supporting frame close to the bidirectional pawl, and a supporting column fixedly connected to the connecting plate is fixedly mounted on the supporting frame.

[0015] Preferably, the elevator bidirectional speed limiter also includes a protective cover symmetrically installed on the support frame corresponding to the outer side of the rope wheel.

[0016] Preferably, the protective cover has at least one first opening communicating with the interior of the support frame and a second opening for the pull rope to pass through.

[0017] Preferably, positioning holes for passing a locking member to fix the protective cover on the support frame are provided at positions at both ends of the support frame corresponding to the protective cover.

[0018] (III) Beneficial effects

[0019] The elevator bidirectional speed limiter places the safety switch and the electromagnet inside the support frame, which can effectively trigger and monitor the action of the bidirectional pawl, and at the same time effectively reduce the risk of the safety switch and the electromagnet being exposed to the outside and being easily damaged by collision, thereby increasing the service life of the speed limiter.

[0020] The elevator bidirectional speed limiter uses a photoelectric sensor instead of an existing Hall sensor, which can effectively improve the accuracy of rope wheel speed measurement and can meet the needs of high-speed rotation of the rope wheel.

[0021] The elevator bidirectional speed limiter can effectively protect the rope pulley and the signal disk by providing a protective cover, and can effectively reduce the risk of collision damage to the rope pulley and the signal disk during installation and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the elevator bidirectional speed limiter in Example 1;

[0023] Figure 2 Schematic diagram of the main structure of the elevator bidirectional speed limiter in Example 1;

[0024] Figure 3 This is a schematic diagram of the structure of the elevator bidirectional speed limiter in Example 2.

[0025] In the figure:

[0026] 1. Support frame;

[0027] 2. Rope pulley;

[0028] 3. Bidirectional ratchet;

[0029] 4. Two-way pawl;

[0030] 5. Safety switch;

[0031] 6. Electromagnet;

[0032] 7. Signal panel;

[0033] 8. Sensor;

[0034] 9. Perforation;

[0035] 10. Connecting plate;

[0036] 11. Support column;

[0037] 12. Protective cover;

[0038] 13. Positioning hole. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Example 1

[0041] This embodiment provides a new type of elevator bidirectional speed limiter, such as Figure 1 and Figure 2 As shown, the elevator bidirectional speed limiter includes a support frame 1, a rope wheel 2, a bidirectional ratchet 3, a bidirectional pawl 4, a safety switch 5 and an electromagnet 6; wherein the rope wheel 2 and the bidirectional ratchet 3 are rotatably installed inside the support frame 1, and the bidirectional pawl 4 is movably installed inside the support frame 1 for triggering and cooperating with the bidirectional ratchet 3 to lock the rope wheel 2.

[0042] During braking, the electromagnet 6 channel pushes the two-way pawl 4 to rotate, so that the claw of the two-way pawl 4 moves close to the two-way ratchet 3, and cooperates with the two-way ratchet 3 to lock the rope wheel 2; when the two-way pawl 4 is triggered and cooperates with the two-way ratchet 3 to lock the rope wheel 2, the end of the two-way pawl 4 away from the two-way ratchet 3 contacts the safety switch 5; at this time, the safety switch 5 feeds back the trigger signal to the control system.

[0043] Different from the existing elevator bidirectional speed limiter, the electromagnet 6 is fixedly installed inside the support frame 1 at a position corresponding to one end of the bidirectional pawl 4, and is used to drive the bidirectional pawl 4 to rotate so that the bidirectional pawl 4 cooperates with the bidirectional ratchet 3 to lock the rope pulley 2; the safety switch 5 is fixedly installed inside the support frame 1 at a position corresponding to one end of the bidirectional pawl 4 away from the electromagnet 6, and is used to contact the end of the bidirectional pawl 4 away from the electromagnet 6; when the bidirectional pawl 4 contacts the bidirectional ratchet 3, the end of the bidirectional pawl 4 away from the electromagnet 6 contacts the safety switch 5.

[0044] It can be understood that the elevator bidirectional speed limiter places the safety switch 5 and the electromagnet 6 inside the support frame 1, and can trigger the bidirectional pawl 4 through the electromagnet 6. While monitoring whether the bidirectional pawl 4 is triggered by the safety switch 5, the risk of the safety switch 5 and the electromagnet 6 being exposed to the outside and susceptible to damage by collision can be effectively reduced, thereby increasing the service life of the speed limiter.

[0045] Among them, in order to install the safety switch 5 and the electromagnet 6 inside the support frame 1, the electromagnet 6 and the safety switch 5 can be used to trigger the two-way pawl 4 and monitor the action status of the two-way pawl 4 respectively; a connecting plate 10 for supporting the safety switch 5 and the electromagnet 6 is fixedly installed inside the support frame 1; the connecting plate 10 is located at the middle position inside one end of the support frame 1 close to the two-way pawl 4, and a support column 11 fixedly connected to the connecting plate 10 is fixedly installed on the support frame 1.

[0046] Furthermore, in order to effectively monitor the rotation speed and direction of the rope wheel 2; Figure 1 and Figure 2 As shown, a signal disk 7 that rotates with the rope wheel 2 is fixedly installed on the rope wheel 2, and two sensors 8 corresponding to the signal disk 7 are fixedly installed on the support frame 1. Among them, the signal disk 7 is provided with a plurality of perforations 9 distributed in a circular array; the sensor 8 is a photoelectric sensor. In this way, when the signal disk 7 rotates with the rope wheel 2, the perforations 9 correspond to the position of the photoelectric sensor, and the photoelectric sensor senses the light source; when the part without perforations 9 on the signal disk 7 corresponds to the position of the photoelectric sensor, the photoelectric sensor is blocked; the rotation speed of the signal disk 7 is determined by obtaining the induction frequency of the sensor 8, thereby obtaining the rotation speed of the rope wheel. At the same time, two sensors 8 are used, and one of the sensors 8 can be used as a control sensing area to cooperate with the other sensor 8. By comparing the timing of the two sensors 8, the rotation direction of the signal disk 7 can be determined, and then the rotation direction of the rope wheel 2 can be determined; in this way, the rotation speed and direction of the rope wheel 2 can be monitored.

[0047] Example 2

[0048] Different from the first embodiment, in order to reduce the risk of collision and damage between the rope wheel 2 and the signal disk 7; Figure 1 and Figure 3 As shown, the elevator bidirectional speed limiter also includes a protective cover 12 symmetrically installed on the support frame 1 corresponding to the outer side of the rope wheel 2.

[0049] It can be further understood that by providing a protective cover 12 at the outer position of the support frame 1 corresponding to the rope pulley 2 and the signal disk 7, the possibility of the rope pulley 2 and the signal disk 7 contacting with external hard objects is reduced during installation or transportation, thereby protecting the rope pulley 2 and the signal disk 7 and reducing the risk of collision damage to the rope pulley 2 and the signal disk 7.

[0050] In order to protect the rope wheel 2 and the signal disk 7 while avoiding the protective cover 12 from restricting the rope bypassing the rope wheel, so that both ends of the rope bypassing the rope wheel 2 can be extended from the support frame 1, the protective cover 12 has at least a first opening connected to the inside of the support frame 1 and a second opening for the rope to pass through. In order to fix the protective cover 12 to the support frame 1, the support frame 1 is provided with positioning holes 13 at the positions corresponding to the two ends of the protective cover 12, which are used to pass through the locking member to fix the protective cover 12 on the support frame 1. The locking member can be a screw or a bolt.

[0051] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A novel elevator bidirectional speed limiter, comprising a support frame (1), a rope wheel (2), a bidirectional ratchet (3), a bidirectional pawl (4), a safety switch (5) and an electromagnet (6); wherein: The rope wheel (2) and the bidirectional ratchet (3) are rotatably mounted inside the support frame (1), and the bidirectional pawl (4) is movably mounted inside the support frame (1) and is used to trigger and cooperate with the bidirectional ratchet (3) to lock the rope wheel (2); The invention is characterized in that: the electromagnet (6) is fixedly mounted inside the support frame (1) at a position corresponding to one end of the bidirectional pawl (4), and is used to drive the bidirectional pawl (4) to rotate so that the bidirectional pawl (4) cooperates with the bidirectional ratchet (3) to lock the rope wheel (2); The safety switch (5) is fixedly mounted inside the support frame (1) at a position corresponding to the end of the bidirectional pawl (4) away from the electromagnet (6), and is used to contact the end of the bidirectional pawl (4) away from the electromagnet (6); When the bidirectional pawl (4) contacts the bidirectional ratchet (3), the end of the bidirectional pawl (4) away from the electromagnet (6) contacts the safety switch (5).

2. The novel elevator bidirectional speed limiter according to claim 1 is characterized in that: A signal disk (7) that rotates with the rope wheel (2) is fixedly mounted on the rope wheel (2), and two sensors (8) corresponding to the signal disk (7) are fixedly mounted on the support frame (1).

3. The novel elevator bidirectional speed limiter according to claim 2 is characterized in that: The signal disk (7) is provided with a plurality of through holes (9) distributed in a ring array.

4. The novel elevator bidirectional speed limiter according to claim 2 is characterized in that: The sensor (8) is a photoelectric sensor.

5. The novel elevator bidirectional speed governor according to claim 1 is characterized in that: A connecting plate (10) for supporting the safety switch (5) and the electromagnet (6) is fixedly installed inside the support frame (1).

6. The novel elevator bidirectional speed governor according to claim 5 is characterized in that: The connecting plate (10) is located at a middle position inside one end of the support frame (1) close to the bidirectional pawl (4), and a supporting column (11) fixedly connected to the connecting plate (10) is fixedly mounted on the support frame (1).

7. The novel elevator bidirectional speed governor according to claim 1 is characterized in that: The elevator bidirectional speed limiter also includes a protective cover (12) symmetrically mounted on the support frame (1) corresponding to the outer side of the rope wheel (2).

8. The novel elevator bidirectional speed governor according to claim 7 is characterized in that: The protective cover (12) has at least a first opening communicating with the interior of the support frame (1) and a second opening for the pull rope to pass through.

9. The novel elevator bidirectional speed governor according to claim 7 is characterized in that: Positioning holes (13) for passing locking members through to fix the protective cover (12) on the support frame (1) are provided at positions at both ends of the support frame (1) corresponding to the protective cover (12).

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