Dual-control triggered anti-falling safety device

Abstract

This invention discloses a dual-control triggered fall arrestor, relating to the field of elevator safety technology. It includes a housing, a brake drum, a gear shaft, a centrifugal seat, and a centrifugal block, as well as a push rod. A trigger rod one is embedded within the brake drum, and trigger rods two and three are embedded in the center and radially of the gear shaft, respectively. Trigger rod three is also equipped with an elastic reset element. The push rod, trigger rods one, two, and three, and the centrifugal block are sequentially connected end-to-end. The push rod is triggered electrically or manually to sequentially push trigger rods one, two, and three to the centrifugal block until the centrifugal block is pushed to the braking position, thus triggering the safety device's braking. After the safety device brakes, the elastic reset element resets trigger rods one, two, and three. This invention retains the condition of triggering braking under the action of rotational centrifugal force in existing safety devices, and also achieves electrically controlled braking through a multi-stage push mechanism that can be electrically or manually driven, achieving the effect of dual electromechanical control for braking.

Description

Technical Field

[0001] This invention relates to the field of elevator safety technology, and in particular to a dual-control triggered fall arrestor. Background Technology

[0002] Fall arrestors are the most important safety devices in construction hoists. With the development of construction machinery technology, users have put forward higher requirements for fall arrestors. For example, a Chinese utility model patent with patent authorization announcement number CN 205739867 U discloses a fall arrestor and its components, including: a housing, a brake drum housed in the housing, and an end cover engaged at one end of the housing. The fall arrestor also includes a coupling gear, which includes a main shaft and a gear. The first end of the main shaft is supported by the inner hole of the brake drum, and the second end of the main shaft is supported by the center hole of the end cover. The gear is located at the second end of the main shaft. A centrifugal seat and a centrifugal block are provided between the first and second ends of the main shaft. The end cover has an outer surface facing the gear and an inner surface facing the centrifugal seat. An outer annular countersunk hole is provided on the outer surface of the end cover, and an outer end face bearing is provided in the outer annular countersunk hole. This fall arrestor has a simple structure, good sealing, reliable positioning, and is easy to maintain.

[0003] However, the fall arrestor in this technical solution can only achieve mechanical braking, which has a narrow scope of application. Based on this, the present invention designs a fall arrestor with dual control triggering to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a simple, stable, and reliable dual-control trigger fall arrestor. While retaining the mechanical braking of existing safety devices, it actively triggers braking through external power electronic control. The external power can be electric, starting, spring force, or manual thrust.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dual-control trigger fall arrestor includes a housing, a brake drum, and a centrifugal block. It also includes a push rod located at the rear cover of the housing. A trigger rod one is embedded within the brake drum. A trigger rod two and a trigger rod three are embedded within the gear shaft along its vertical central axis and radially, respectively. The trigger rod three is also equipped with an elastic reset element. Wherein:

[0007] The push rod, trigger rod one, trigger rod two, trigger rod three, and centrifuge block are connected end to end in sequence. The push rod is triggered by electric or manual control to push trigger rod one, trigger rod two, trigger rod three in sequence and transmit to the centrifuge block until the centrifuge block is pushed to the braking position to trigger the safety device to brake.

[0008] After the safety device is braked, the elastic reset element resets trigger rod one, trigger rod two, and trigger rod three.

[0009] Furthermore, the push rod is electrically controlled using an electronic control device, and the push rod is connected to the drive end of the electronic control device.

[0010] Furthermore, the triggering and driving function of the electronic control device is implemented using an electromagnet.

[0011] Furthermore, the triggering and pushing function of the electronic control device is implemented using an electric cylinder.

[0012] Furthermore, the push rod's pushing function is also triggered by a spring.

[0013] Furthermore, the push rod pushing function is also triggered by a cylinder.

[0014] Furthermore, the push rod is manually controlled by setting a manual push switch at the end of the push rod away from the trigger rod, and the operating end of the manual push switch is located outside the rear cover of the housing.

[0015] Furthermore, the elastic reset component is connected to one end of the trigger rod three near the centrifugal block. The elastic reset component mainly consists of a lifting spring and a spring baffle. The lifting spring is used to position the trigger rod three and to allow the trigger rod one, trigger rod two, and trigger rod three to return to their original positions under the action of the lifting force after braking.

[0016] Furthermore, the number of centrifuge blocks is one, two, or more.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In this invention, a control mechanism formed by a multi-segment pusher is installed inside the fall arrestor, and electrically controlled by an electronic control device. When the elevator descends, triggering the electronic control device alone pushes out the centrifugal block to initiate braking. After braking, the multi-segment pusher is reset to its original position by an elastic reset component, ensuring that the electronic triggering system does not interfere with or affect the fall arrestor's braking during normal use. This ensures both the normal mechanical braking effect of the fall arrestor and electric control-triggered braking, thus achieving a dual electromechanical control fall arrestor. Furthermore, no additional electrical components are added inside the fall arrestor besides the electronic control device, achieving dual control braking through both electronic and mechanical means, facilitating maintenance and adjustment. Moreover, by connecting a switch external to the electronic control device, manual control can be used to actively trigger the fall arrestor's braking, making it suitable for emergency braking situations.

[0019] The entire fall arrestor in this invention can be triggered and braked through both electronic and mechanical principles, and can also be manually triggered, which can meet more usage needs and expand its applicability. The entire device has a simple structure and stable and reliable triggering operation. Attached Figure Description

[0020] Figure 1 This is a longitudinal sectional view of the dual-control triggered fall arrestor in this invention;

[0021] Figure 2 This is a cross-sectional view of the principle of the non-triggered braking state in this invention;

[0022] Figure 3 This is a cross-sectional diagram illustrating the principle of triggering the braking state in this invention.

[0023] In the diagram: 1. Rear cover; 2. Cable clamp; 3. Electrical control device; 4. Electrical control device mounting plate; 5. Shaft end retaining ring; 6. Switch cover; 7. Rotation stop ring; 8. Loading nut; 9. Brake drum; 10. Housing; 11. Disc spring; 12. Trigger rod one; 13. Trigger rod retaining ring; 14. Trigger rod positioning pin; 15. Gear shaft; 16. Trigger rod two; 17. Spring baffle; 18. Trigger rod three; 19. Centrifuge block; 20. Lifting spring; 21. Centrifuge seat; 22. End cover. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Given that current fall arrestors are purely mechanically triggered, resulting in a narrow range of applications, this application proposes a fall arrestor that can be triggered by both mechanical and electronic principles.

[0026] like Figure 1 As shown, a dual-control trigger fall arrestor includes a housing 10, a rear cover 1 fixed to the rear end of the housing 10 by bolts, an end cover 22 fixed to the front end of the housing 10, and the housing 10 and the rear cover 1 form an accommodating space. In the accommodating space, there are a brake drum 9, a loading nut 8, a disc spring 11, a gear shaft 15, a centrifugal seat 21, and a centrifugal block 19.

[0027] Specifically, in one possible embodiment, the housing 10 and the brake drum 9 include generally tapered proximity portions to provide braking force. The brake drum 9 is housed within the housing 10 and engaged with an end cap 22 at one end of the housing 10. A loading nut 8 is screwed onto the brake drum 9 and secured by bolts to a rotation-damping ring 7 to restrict its axial rotation. A disc spring 11 is sleeved below the loading nut 8. The gear shaft 15 includes a main shaft and a gear. One end of the main shaft is supported by the inner bore of the brake drum 9, and the other end is supported by the center bore of the end cap 22. The gear is located at the other end of the main shaft. A centrifugal seat 21 and a centrifugal block 19 are provided between the two ends of the main shaft 15. The centrifugal seat 21 may be mounted on the journal of the main shaft, for example, using a flat key, and its end is fixed by an axial retaining ring.

[0028] Under normal mechanical braking, the working principle of the fall arrestor is as follows: when the cage stalls and falls to a certain extent, the speed of the gear shaft 15 increases, which drives the centrifugal seat 21 to rotate rapidly. This causes the centrifugal block 19 on the centrifugal seat 21 to engage with the brake drum 9 under the action of centrifugal force, and drive the brake drum 9 to rotate. This causes the loading nut 8 to move downward and apply downward pressure to the disc spring 11, so that the brake drum 9 overcomes the pressure of the disc spring 11 and approaches and contacts the housing 10, thereby producing a braking effect.

[0029] To achieve braking of the fall arrestor using both mechanical and electric principles, this application also provides the following structure: A control mechanism composed of multi-segmented pushers is provided within the accommodating space formed by the housing 10 and the rear cover 1, located between the tail of the rear cover 1 and the centrifugal block 19. This control mechanism is electrically or manually controlled. By operating the exposed control lever at the tail of the rear cover 1, the braking of the fall arrestor is triggered, while retaining the original triggering method of the centrifugal block 19 under the action of rotational centrifugal force. The control mechanism will be described in detail below:

[0030] The fall arrestor of this application also includes a push rod located at the rear cover 1, a trigger rod 12 embedded in the brake drum 9, and trigger rods 16 and 18 embedded in the gear shaft 15 along its vertical central axis and radial direction, respectively. The push rod, trigger rod 12, trigger rod 16, trigger rod 18 and centrifugal block 19 are connected end to end in sequence.

[0031] Specifically, a through hole is opened in the brake drum 9 along its central axis, and trigger rod 12 is located in the through hole. One end of trigger rod 12 is in contact with the push rod, and the other end of trigger rod 12 is connected to trigger rod 2 16 end to end. Trigger rod 12 is circumferentially positioned by trigger rod retaining ring 13, which is located at the connection between trigger rod 12 and trigger rod 2 16.

[0032] A blind hole is opened inside the gear shaft 15 along its central axis. The trigger rod 16 is located in the blind hole. Another blind hole is opened radially at the end of the blind hole along the axis of the gear shaft 15. The trigger rod 18 is located in the other blind hole. One end of the trigger rod 18 is in contact with the trigger rod 16, and the other end is in contact with the inner side of the centrifugal block 19.

[0033] The trigger lever 18 is also equipped with an elastic reset component. The elastic reset component is connected to the end of the trigger lever 18 near the centrifugal block 19. The elastic reset component is mainly composed of a lifting spring 20 and a spring baffle 17. The trigger lever 18 is positioned by the lifting spring 20 and the spring baffle 17. The lifting spring 20 continuously applies a lifting force to the trigger lever 18 to ensure that the fall arrestor will not affect the centrifugal block 19 during the operation of the elevator. At the same time, the lifting spring 20 also ensures that after braking, the trigger lever 12, the trigger lever 26, and the trigger lever 18 return to their original positions smoothly under the lifting force of the lifting spring 20.

[0034] The push rod can be pushed through either electronic or manual control.

[0035] The electric control of the push rod is achieved using an electric control device 3, with the push rod connected to the drive end of the electric control device 3. A power supply cable is connected to the electric control device 3, extending through the rear cover 1 to the outside of the rear cover 1 to connect to a power source. The rear cover 1 is equipped with a cable clamp 2 for securing the cable. Furthermore, an electric control device mounting plate 4 is bolted inside the rear cover 1, and the electric control device 3 is fixed to the electric control device mounting plate 4.

[0036] In a possible embodiment, the triggering and pushing function of the electronic control device 3 can be implemented using, for example, an electromagnet or an electric cylinder.

[0037] When the triggering and pushing function of the electronic control device 3 is implemented by using an electromagnet: by energizing the electromagnet, the electromagnet becomes magnetic, and under the action of the magnetic force, it pushes the push rod and sequentially pushes the trigger rod 12, trigger rod 2 16, trigger rod 3 18 until it pushes the centrifugal block 19 to the braking position, thereby achieving the braking effect.

[0038] When the triggering and pushing function of the electronic control device 3 is implemented by an electric cylinder: by energizing the electric cylinder, the electric cylinder pushes the push rod, and in turn pushes the trigger rod 12, trigger rod 2 16, trigger rod 3 18 in sequence until the centrifugal block 19 is pushed to the braking position, thereby achieving the braking effect.

[0039] When the triggering and pushing function of the electronic control device 3 is implemented by a spring or a cylinder: the cylinder is controlled by a solenoid valve. When the solenoid valve is energized, the cylinder works and pushes the push rod, or pushes the push rod with the help of spring force. Similarly, the trigger rod 12, trigger rod 2 16, trigger rod 3 18 are pushed in sequence until the centrifugal block 19 is pushed to the braking position to achieve the braking effect.

[0040] The manual control of the push rod is achieved by setting a manual push switch at the end of the push rod away from the trigger rod 12, and the operating end of the manual push switch is located outside the rear cover 1 of the housing 10. The housing 10 is provided with a switch cover 6. The manual push switch can be externally connected to the electronic control device 3, and in an emergency, the safety device can be actively triggered by manual control.

[0041] In addition, the triggering mechanism for the push rod can also be achieved using a spring or cylinder. The push rod is pushed using spring force or pneumatic force from a cylinder, thus achieving braking.

[0042] Based on the above structure, during braking, generally speaking, the push rods are triggered by electronic or manual control to sequentially push the first trigger rod 12, the second trigger rod 16, and the third trigger rod 18 and transmit the power to the centrifugal block 19 until the centrifugal block 19 is pushed to the braking position to trigger the braking of the safety device; at the same time, after the safety device brakes, the elastic reset member resets the first trigger rod 12, the second trigger rod 16, and the third trigger rod 18.

[0043] like Figure 2-3 As shown, the detailed braking process of the electrically controlled fall arrestor is as follows: During the descent of the elevator, the electrical control device 3 is triggered, and the push rod is pushed towards the interior of the safety device. The thrust is simultaneously pushed by the trigger rod 12 and the trigger rod 26 towards the tooth surface. The trigger rod 26 pushes the trigger rod 38 towards the centrifugal block 19. The centrifugal block 19 is lifted to the braking position, and the centrifugal block 19 abuts against the brake drum 9 and rotates synchronously. The torque of the brake drum 9 is transmitted to the loading nut 8, and the loading nut 8 presses down on the disc spring 11. The deformation pressure of the disc spring 11 is transmitted to the side of the brake drum 9 and reacts on the brake drum 9, causing the brake drum 9 to exert force on the friction plate of the housing 10 and rub against the friction plate on the housing 10, generating a braking torque, and the safety device brakes.

[0044] After the safety device brakes, the power to the electronic control device 3 is cut off, the thrust disappears, and the trigger lever 18 is pushed back to its original position under the action of the lifting spring 20 and the trigger lever 16. The lifting spring 20 can continuously apply a lifting force to the trigger lever 16, ensuring that the trigger lever 16 will not affect the centrifugal block 19 during the operation of the elevator. In other words, based on the electronic control method, when the elevator is descending, only the electronic control device 3 needs to be triggered to push out the centrifugal block 19 and brake it. Furthermore, apart from the electronic control device 3, no electrical components are added inside the safety device, and the device's triggering operation is stable and reliable. Moreover, the electronically controlled braking triggering mechanism will not affect the safety device during normal use.

[0045] Furthermore, in an emergency, the external switch of the electronic control device 3 can be manually operated to push the push rod into the interior of the safety device, thereby pushing the trigger rod 12, trigger rod 26, trigger rod 38 and centrifugal block 19 in sequence until the centrifugal block 19 is in the braking position, which can also achieve the braking effect.

[0046] In summary, the fall arrestor of this application can achieve rotation triggered by both electrical and mechanical principles. It can not only realize the mechanical braking function of existing fall arrestors, but also realize electrical braking without affecting mechanical braking. In addition, it can also achieve braking by manual control in emergency situations, which can meet more usage needs and expand its applicability.

[0047] Furthermore, it should be noted that the fall arrestor structure based on the aforementioned mechanical and electronic control dual-principle braking can have one, two, or more centrifugal blocks 19. In other words, this application is applicable not only to fall arrestors with one centrifugal block 19, but also to fall arrestors with two or more centrifugal blocks 19. Moreover, the fall arrestor structure disclosed in this embodiment is also applicable to other types of safety devices, such as self-resetting safety devices.

[0048] The embodiments described above are merely examples for illustrating the present invention and are not intended to limit the present invention. The scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dual-control triggered fall arrestor, comprising a housing (10), a gear shaft (15), a brake drum (9), and a centrifugal block (19), characterized in that, When the elevator equipped with the fall arrestor stalls and falls to a certain extent, the rotational speed of the gear shaft (15) increases, causing the centrifugal block (19) to engage with the brake drum (9) under the action of centrifugal force and drive the brake drum (9) to rotate, so that the brake drum (9) approaches and contacts the housing (10) to produce a braking effect. The fall arrestor also includes a push rod located at the rear cover (1) of the housing (10), a trigger rod one (12) is embedded in the brake drum (9), and trigger rod two (16) and trigger rod three (18) are embedded in the gear shaft (15) along its vertical central axis and radially, respectively. The trigger rod three (18) is also provided with an elastic reset element, wherein: The push rod, trigger rod one (12), trigger rod two (16), trigger rod three (18) and centrifugal block (19) are connected end to end in sequence. The push rod is triggered by electric or manual control to push trigger rod one (12), trigger rod two (16), trigger rod three (18) in sequence and transmit to centrifugal block (19) until centrifugal block (19) is pushed to the braking position to trigger the braking of the safety device. After the safety device is braked, the elastic reset member resets trigger rod one (12), trigger rod two (16), and trigger rod three (18).

2. The dual-control triggered fall arrestor according to claim 1, characterized in that, The push rod is electrically controlled by an electronic control device (3), and the push rod is connected to the drive end of the electronic control device (3).

3. A dual-control triggered fall arrestor according to claim 2, characterized in that, The triggering and driving function of the electronic control device (3) is achieved by using an electromagnet.

4. A dual-control triggered fall arrestor according to claim 2, characterized in that, The triggering and pushing function of the electronic control device (3) is achieved by using an electric cylinder.

5. A dual-control triggered fall arrestor according to claim 1, characterized in that, The push rod's pushing function is also triggered by a spring.

6. A dual-control triggered fall arrestor according to claim 1, characterized in that, The push rod pushing function is also triggered by a cylinder.

7. A dual-control triggered fall arrestor according to claim 1, characterized in that, The push rod is manually controlled by setting a manual push switch at the end of the push rod away from the trigger rod (12), and the operating end of the manual push switch is located outside the rear cover (1) of the housing (10).

8. A dual-control triggered fall arrestor according to claim 2 or 3, characterized in that, The elastic reset component is connected to one end of the trigger rod three (18) near the centrifugal block (19). The elastic reset component is mainly composed of a lifting spring (20) and a spring baffle (17). The lifting spring (20) is used to position the trigger rod three (18) and to make the trigger rod one (12), trigger rod two (16) and trigger rod three (18) return to their original positions under the action of the lifting force after braking.

9. A dual-control triggered fall arrestor according to claim 8, characterized in that, The number of centrifuge blocks (19) is one, two or more.

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