Elevator falling protection device

Abstract

The elevator falling protection device comprises an elevator pit, a base, a buffer plate and a buffer mechanism, the base is fixedly arranged at the bottom of the elevator pit, the buffer mechanism comprises a buffer, a push rod, a roller, a wedge-shaped block and a stop dog, the buffer is arranged on the base, one end of the push rod is connected with the buffer, and the other end of the push rod is connected with the wedge-shaped block. The other end of the push rod is fixedly connected with the bottom of the buffer plate, a sliding groove is formed in the upper surface of the base, the wedge-shaped block is arranged in the sliding groove, the rolling wheel is arranged on the push rod through a fixing rod, the check block is fixedly arranged on the base, and a first spring is arranged between the check block and the wedge-shaped block. Due to the arrangement of the buffer plate and the buffer mechanism, the elevator and passengers in the elevator can be buffered and protected when the elevator falls down due to faults, and damage to the elevator and the passengers in the elevator is reduced as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator equipment, in particular to an elevator fall protection device. Background Art

[0002] An elevator is a means of transportation used to transport people or objects vertically. In ancient times, people used hanging baskets or pulley systems for vertical transportation. However, these methods have safety hazards and low efficiency. With the advent of the Industrial Revolution, the urbanization process has accelerated, the construction of high-rise buildings has increased, and people's demand for vertical transportation has also increased. The earliest elevators used steam power and used ropes and pulley systems for vertical transportation. With the development of electric power technology, the design and use of elevators have gradually improved. In the early 20th century, elevators began to be driven by electric motors, and steel cables replaced ropes, making the operation of elevators safer and more efficient.

[0003] Once the elevator equipment fails, it will cause fatal danger to the elevator and the passengers in the elevator car. For example, the elevator cable may break due to aging, wear, rust and overload, or the elevator braking system may fail so that the car cannot stop, and the elevator power failure may cause the elevator to fall. The elevator fall is irreversible, so some measures can only be taken when the elevator falls to reduce the impact force when the elevator falls to the bottom pit, so as to reduce the damage to the passengers trapped in the elevator and the elevator. The prior art uses springs to reduce shock when the elevator falls, but the springs are prone to deformation after a long period of use, and the acceleration generated when the elevator falls is large. It is difficult to withstand the impact force generated by the elevator fall multiple times using only springs, and they need to be replaced frequently. Utility Model Content

[0004] The utility model provides an elevator fall protection device to solve the above-mentioned technical problems that the spring is prone to deformation after being used for too long and it is difficult to withstand multiple large impact forces using only the spring.

[0005] The technical solution of the utility model is achieved in this way:

[0006] An elevator fall protection device comprises an elevator pit, a base, a buffer plate and a buffer mechanism, wherein a mounting frame is provided on the side wall of the elevator pit, the base is fixedly arranged at the bottom of the elevator pit, the buffer plate is arranged above the base, the buffer mechanism comprises a buffer, a push rod, a wedge block, a stopper and a roller, the buffer is arranged on the upper surface of the base, one end of the push rod is connected to the buffer, and the other end of the push rod is fixedly connected to the buffer plate, a slide groove is provided on the upper surface of the base, the wedge block is arranged in the slide groove, the stopper is fixedly arranged on the upper surface of the base, a first spring is provided between the stopper and the wedge block, and the roller is arranged on the push rod through a fixing rod.

[0007] Preferably, a buffer pad is provided on the upper surface of the buffer plate.

[0008] Preferably, a deceleration mechanism is provided on the outside of the buffer mechanism, and the deceleration mechanism includes a support rod, a sleeve and a second spring. One side of the support rod is connected to the mounting frame through a tension spring, and the sleeve is arranged inside the base. The upper end of the support rod is fixedly arranged on the lower surface of the buffer plate, and the lower end of the support rod is arranged in the sleeve.

[0009] Preferably, a second spring is provided in the sleeve, and the lower end of the support rod is connected to the second spring.

[0010] Preferably, there are two support rods, which are symmetrically arranged on both sides of the buffer mechanism.

[0011] Preferably, a roller groove is provided on the surface of the wedge block in contact with the roller, and the roller is arranged in the roller groove.

[0012] Preferably, there are two groups of the wedge blocks and the stop blocks, which are symmetrically arranged on both sides of the push rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides an elevator fall protection device. The device is provided with a base, a buffer mechanism, a buffer plate, a buffer pad and a speed reduction mechanism. The buffer, roller, wedge block, stopper and first spring in the buffer structure can play a preliminary buffering role on the elevator when the elevator fails and falls. The mounting frame and tension spring as well as the support rod, sleeve and second spring in the speed reduction mechanism can be used to reduce the speed of the elevator when the elevator fails and falls. The speed reduction can reduce the impact force of the elevator when it falls, and reduce the damage to the passengers trapped in the elevator. The buffer pad arranged on the buffer plate can also reduce the impact force generated by the elevator falling. At the same time, the buffer pad can also protect the outside of the elevator, so that the elevator will not be seriously damaged after falling, and the passengers trapped in the elevator will not be injured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural diagram of the elevator fall protection device of the utility model;

[0016] Figure 2 It is a partial enlarged view of the buffer mechanism of the elevator fall protection device of the utility model;

[0017] Figure 3 It is a partial enlarged view of the deceleration mechanism of the elevator fall protection device of the utility model;

[0018] Figure 4 It is a top view of the wedge block of the elevator fall protection device of the utility model.

[0019] 1- elevator pit; 11- mounting frame; 2- base; 21- slide groove; 3- buffer plate; 31- buffer pad; 4- buffer mechanism; 41- buffer; 42- push rod; 43- wedge block; 44- stop block; 45- roller; 46- fixing rod; 47- first spring; 48- roller groove; 5- deceleration mechanism; 51- support rod; 52- sleeve; 53- second spring; 6- tension spring; 7- elevator. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-4The utility model is an elevator fall protection device, including an elevator pit 1, a base 2, a buffer plate 3 and a buffer mechanism 4 and a speed reduction mechanism 5, the base 2 is fixedly arranged at the bottom of the elevator pit 1, the side wall of the elevator pit 1 is provided with a mounting frame 11, the buffer plate 3 is arranged above the elevator pit 1, and a buffer pad 31 is arranged on the buffer plate 3, and the buffer pad 31 is used to reduce the impact force of the elevator 7 falling and protect the bottom of the elevator 7; the buffer mechanism 4 includes a buffer 41, a push rod 42, a wedge block 43, a stopper 44 and a roller 45, the buffer 41 is arranged on the base 2, one end of the push rod 42 is connected to the buffer 41, and the other end of the push rod 42 is fixedly connected to the lower surface of the buffer plate 3, the roller 45 is arranged on the push rod 42 through a fixing rod 46, a slide groove 21 is opened on the upper surface of the base 2, the wedge block 43 is arranged in the slide groove 21, the wedge block 43 can slide left and right in the slide groove 21, and the stopper 44 is fixedly arranged On the upper surface of the base 2, a first spring 47 is provided between the stopper 44 and the wedge block 43, and the first spring 47 can reset the wedge block 43 after the wedge block 43 is pushed toward the stopper 44, and the wedge block 43 contacts the roller 45, and a roller groove begins to appear on the surface where the wedge block 43 contacts the roller 45, and the roller 45 rolls in the roller groove; the deceleration mechanism 5 includes a support rod 51, a sleeve 52 and a second spring 53, one side of the support rod 51 is connected to the mounting frame 11 through a tension spring 6, the sleeve 52 is arranged inside the base 2, the upper end of the support rod 51 is fixedly connected to the lower surface of the buffer plate 3, the lower end of the support rod 51 is arranged in the sleeve 52, and a second spring 53 is provided in the sleeve 52, and the second spring 53 is connected to the lower end of the support rod 51, and the tension spring 6 and the second spring 53 are used to decelerate the elevator 7, and can also enable the support rod 51 to return to the initial state after decelerating the elevator 7.

[0022] Furthermore, two slide grooves 21 are provided on the upper surface of the base 2, and the two slide grooves 21 are symmetrically arranged on both sides of the buffer 41. A wedge block 43 is correspondingly arranged in the slide groove 21, and a roller 45 is correspondingly arranged in the roller groove of the wedge block 43. When the elevator 7 falls onto the buffer pad 31, the impact force and gravity will press the buffer plate 3 downward. At this time, the roller 45 rolls downward on the wedge block 43, so that the wedge block 43 moves to the stop block 44. The stop block 44 limits the wedge block 43, and the shock absorber rebounds after absorbing the impact force, so that the elevator 7 can perform the first round of buffering.

[0023] Furthermore, there are two support rods 51 , which are symmetrically arranged on both sides of the buffer mechanism 4 .

[0024] Furthermore, the shock absorber uses a liquid shock absorber, which solves the problem that the spring is easily deformed after a long period of use, and the acceleration generated when the elevator 7 falls is large. It is difficult to withstand the impact force generated by the fall of the elevator 7 using only the spring, and frequent replacement is required.

[0025] Furthermore, the tension spring 6 and the second spring 53 connected by the support rod 51 drive the support rod 51 to move downward when the elevator 7 falls. During the downward movement, the elastic force of the tension spring 6 and the second spring 53 hinders the descent of the elevator 7, so that the descent speed of the elevator 7 is further slowed down, realizing the second round of shock absorption. At this time, the elevator 7 can land on the buffer pad 31 more smoothly.

[0026] The working principle of the elevator fall protection device provided by the utility model is:

[0027] When the elevator 7 fails and falls, the bottom of the elevator 7 first contacts the buffer pad 31. Since the buffer pad 31 is soft in texture, the buffer pad 31 can provide preliminary buffering for the elevator 7. At the same time, the buffer pad 31 can provide certain protection for the elevator 7. Then, the impact force of the elevator 7 falling and its own gravity cause the buffer plate 3 to move downward, and the buffer plate 3 drives the push rod 42 to move downward. The push rod 42 drives the roller 45 to move downward through the fixed rod 46, pushing the wedge block 43 to move in the direction of the stop block 44. The stop block 44 limits the wedge block 43. At the same time, the buffer 41 rebounds after absorbing the impact force, and performs the first round of buffering for the elevator 7. The buffer plate 3 moves downward and drives the support rod 51 to move downward. The tension spring 6 connected to the support rod 51 is stretched, and the second spring 53 is compressed, which can further achieve the deceleration and buffering of the elevator 7, so that the elevator 7 can fall on the buffer pad 31 more smoothly, thereby ensuring the life safety of the passengers trapped in the elevator 7.

[0028] The utility model provides an elevator fall protection device, which is provided with a base 2, a buffer mechanism 4, a buffer plate 3, a buffer pad 31 and a deceleration mechanism 5. The buffer 41, the roller 45, the wedge block 43, the stopper 44 and the first spring 47 in the buffer structure can play a preliminary buffering role on the elevator 7 when the elevator 7 fails to fall. The mounting frame 11 and the tension spring 6 and the support rod 51, the sleeve 52 and the second spring 53 in the deceleration mechanism 5 can play a deceleration role on the elevator 7 when the elevator 7 fails to fall. The reduced speed can reduce the impact force of the elevator 7 when it falls, and reduce the damage to the passengers trapped in the elevator 7. The buffer pad 31 arranged on the buffer plate 3 can also reduce the impact force generated by the fall of the elevator 7. At the same time, the buffer pad 31 can also protect the outside of the elevator 7, so that the elevator 7 will not be seriously damaged after falling, and the passengers trapped in the elevator 7 will not be injured.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. Elevator fall protection device, Features: The invention comprises an elevator pit (1), a base (2), a buffer plate (3) and a buffer mechanism (4), wherein a mounting frame (11) is provided on a side wall of the elevator pit (1), the base (2) is fixedly arranged at the bottom of the elevator pit (1), the buffer plate (3) is arranged above the base (2), the buffer mechanism (4) comprises a buffer (41), a push rod (42), a wedge block (43), a stopper (44) and a roller (45), the buffer (41) is arranged on the upper surface of the base (2), one end of the push rod (42) is connected to the buffer (41), and the other end of the push rod (42) is fixedly connected to the buffer plate (3), a slide groove (21) is provided on the upper surface of the base (2), the wedge block (43) is arranged in the slide groove (21), and the stopper (44) is fixedly arranged on the base (2) upper surface, a first spring (47) is provided between the stopper (44) and the wedge block (43), and the roller (45) is provided on the push rod (42) through a fixing rod (46); a deceleration mechanism (5) is provided on the outer side of the buffer mechanism (4), and the deceleration mechanism (5) comprises a support rod (51), a sleeve (52) and a second spring (53), one side of the support rod (51) is connected to the mounting frame (11) through a tension spring (6), the sleeve (52) is provided inside the base (2), the upper end of the support rod (51) is fixedly provided on the lower surface of the buffer plate (3), and the lower end of the support rod (51) is provided in the sleeve (52); a second spring (53) is provided in the sleeve (52), and the lower end of the support rod (51) is connected to the second spring (53).

2. The elevator fall protection device according to claim 1, Features: A buffer pad (31) is provided on the upper surface of the buffer plate (3).

3. The elevator fall protection device according to claim 1, Features: There are two support rods (51), which are symmetrically arranged on both sides of the buffer mechanism (4).

4. The elevator fall protection device according to claim 1, Features: A roller groove is provided on the surface of the wedge block (43) that contacts the roller (45), and the roller (45) is arranged in the roller groove.

5. The elevator fall protection device according to claim 4, Features: There are two groups of the wedge blocks (43) and the stop blocks (44), which are symmetrically arranged on both sides of the push rod (42).

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