Self-balancing elevator safety tongs

Abstract

The utility model relates to the technical field of safety tongs, and particularly discloses a self-balancing type elevator safety tong which comprises a safety tong body, a penetrating-out groove is formed in the lower portion of the interior of the safety tong body, an installation shell is fixedly installed at the bottom end of the safety tong body, and a limiting mechanism is arranged in the installation shell. The limiting mechanism comprises a supporting rod, the supporting rod is fixedly mounted in the mounting shell, the outer wall of the supporting rod is sleeved with a fixing plate, a sleeve is rotationally connected to one side of the fixing plate on the outer wall of the supporting rod, and an abutting plate is rotationally connected to one side of the fixing plate; through cooperation of a supporting rod, a fixing plate, a sleeve, an abutting plate, a connecting rod, a ball bearing, a rotating rod and an abutting rod, a steel wire rope penetrating out of the safety tongs body can be limited, and the situation that the steel wire rope deflects due to components in the safety tongs body, and consequently the whole steel wire rope shakes is avoided; therefore, the balance of the steel wire rope is kept and an unbalance state is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of safety clamps, in particular to a self-balancing elevator safety clamp. Background Art

[0002] In elevator systems, the progressive safety clamp is an essential safety device. It is usually fixed to the elevator car. When the elevator is operating abnormally and the speed limiter is activated, the pulling mechanism will pull the wedge on the progressive safety clamp, causing it to clamp the elevator guide rails and brake the elevator car.

[0003] The braking effect of the elevator safety clamp in the existing technology is not ideal during operation, and it lacks certain safety performance. If an emergency occurs, such as an accidental breakage of the wire rope or a failure of the lifting mechanism of the cushion body, it will cause certain accidents and be very inconvenient to use.

[0004] The existing patent (publication number: CN211712388U) discloses a self-balancing progressive elevator safety clamp. When braking, the lifting mechanism on the elevator synchronously pulls the pull rope, causing the two wedge-shaped brake blocks distributed inside the body to slide upward (at this time, the slide plate slides in the slide groove on the wedge-shaped baffle), and the two electric telescopic rods located on the body synchronously push the two wedge-shaped spring pads and the wedge-shaped sliding blocks closer to each other. This synchronous operation can prevent the wedge-shaped brake block on one side from deforming when braking the guide rail, and when the wire rope breaks accidentally or the lifting mechanism of the elevator fails, the first block on the wedge-shaped sliding block and the second block on the slide plate form a blocking position, which can limit the descent of the body and prevent certain accidents caused by braking failure, thereby improving the braking effect and further improving the safety of the elevator.

[0005] In response to the above problems, the solution provided by the existing patent can limit the wire rope through the cooperation of components such as the electric telescopic rod. However, in actual use, the wedge-shaped spring pad is elastic, and the electric telescopic rod is divided into two groups. There may be certain errors in the telescopic process, which will cause the wire rope to be in a certain skewed state, which will have a certain impact on the stability of the elevator. Summary of the Invention

[0006] The purpose of the utility model is to provide a self-balancing elevator safety clamp, which can limit the steel wire rope passing through the safety clamp body, avoid the steel wire rope from being deflected due to the internal components of the safety clamp body, and cause the entire steel wire rope to shake, thereby maintaining the balance of the steel wire rope and avoiding an unbalanced state, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a self-balancing elevator safety clamp, comprising a safety clamp body, a through-groove being provided at the lower interior of the safety clamp body, a mounting shell being fixedly mounted at the bottom end of the safety clamp body, and a limit mechanism being provided inside the mounting shell;

[0008] The limiting mechanism includes a support rod, which is fixedly installed inside the mounting shell, and a fixing plate is sleeved on the outer wall of the support rod, a sleeve is rotatably connected to one side of the fixing plate on the outer wall of the support rod, and a resistance plate is rotatably connected to one side of the fixing plate, a connecting rod is fixedly installed on the outer wall of the resistance plate, and a ball bearing is embedded in the resistance plate, a rotating rod is passed through the interior of the ball bearing, and a resistance rod is fixed to one end of the rotating rod passing through the ball bearing.

[0009] Preferably, a rotating structure is formed between the sleeve and the support rod, and the support rod penetrates the inner wall of the fixing plate.

[0010] Preferably, the fixing plate and the contact plate are tightly fitted, and the contact plate forms a rotating structure with the rotating rod via a ball bearing.

[0011] Preferably, a resistance mechanism is provided on one side of the sleeve, and the resistance mechanism includes a sliding plate, which is slidably connected to the outer wall of the sleeve, and a through hole is opened on the inner wall of the sliding plate corresponding to the position of the sleeve, and the fixed plate is embedded with a fixed cylinder facing the outer wall of the sliding plate.

[0012] Preferably, the interference mechanism further includes a damping spring, which is embedded in the interior of the fixed cylinder, and a rod is passed through the interior of the fixed cylinder, and the rod passes through the outer wall of one end of the fixed cylinder to fix a limit ring.

[0013] Preferably, the sleeve passes through the through hole to the interior of the sliding plate, and a sliding structure is formed between the sliding plate and the sleeve.

[0014] Preferably, a sliding structure is formed between the limiting ring and the fixing cylinder, and an elastic structure is formed between the fixing cylinder and the penetration rod via a damping spring.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The support rod, fixed plate, sleeve, contact plate, connecting rod, ball bearing, rotating rod and contact rod cooperate to limit the position of the wire rope passing through the safety gear body, preventing the wire rope from being deflected due to the internal components of the safety gear body, resulting in the overall shaking of the wire rope, thereby maintaining the balance of the wire rope and avoiding imbalance;

[0017] 2. Through the cooperation of the sliding plate, fixed tube, through hole, damping spring, penetration rod and limit ring, the wire rope can be elastically clamped to avoid excessive shaking. At the same time, the elastic clamping of the damping spring has a certain shock-absorbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is the overall structural view of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the support rod of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the sleeve of the utility model;

[0022] Figure 4 This is a schematic structural diagram of the ball bearing of the utility model;

[0023] Figure 5 This is a schematic structural diagram of the damping spring of the utility model.

[0024] Description of reference numerals:

[0025] 1. Safety clamp body; 2. Insertion groove; 3. Mounting shell; 4. Limiting mechanism; 401. Support rod; 402. Fixing plate; 403. Sleeve; 404. Interference plate; 405. Connecting rod; 406. Ball bearing; 407. Rotating rod; 408. Interference rod; 5. Interference mechanism; 501. Sliding plate; 502. Fixing cylinder; 503. Through hole; 504. Damping spring; 505. Insertion rod; 506. Limiting ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The utility model provides a technical solution:

[0028] See also Figures 1 to 4 A self-balancing elevator safety clamp includes a safety clamp body 1, a through-groove 2 is formed at the lower portion of the interior of the safety clamp body 1, a mounting shell 3 is fixedly mounted on the bottom end of the safety clamp body 1, and a limiting mechanism 4 is provided inside the mounting shell 3; the limiting mechanism 4 includes a support rod 401, the support rod 401 is fixedly mounted inside the mounting shell 3, a fixing plate 402 is sleeved on the outer wall of the support rod 401, a sleeve 403 is rotatably connected to one side of the fixing plate 402 on the outer wall of the support rod 401, and a contact plate 404 is rotatably connected to one side of the fixing plate 402. A connecting rod 405 is fixedly installed on the outer wall of the contact plate 404, and a ball bearing 406 is embedded in the interior of the contact plate 404. A rotating rod 407 passes through the interior of the ball bearing 406, and a contact rod 408 is fixed to one end of the rotating rod 407 passing through the ball bearing 406. A rotating structure is formed between the sleeve 403 and the support rod 401, and the support rod 401 passes through the inner wall of the fixed plate 402. The fixed plate 402 is tightly fitted with the contact plate 404, and the contact plate 404 forms a rotating structure through the ball bearing 406 and the rotating rod 407.

[0029] By adopting the above technical solution, when the wire rope passes through the safety clamp body 1 through the outlet groove 2 and enters the mounting shell 3, it is wrapped in an S shape around the outside of the sleeve 403 and the resistance rod 408. The sleeve 403 is supported by the support rod 401 and initially limits the wire rope under the limitation of the fixed plate 402 to avoid shaking and imbalance. At the same time, the fixed plate 402 limits the resistance plate 404. The distance between the two resistance plates 404 is consistent with the inner diameter of the wire rope, which further plays a limiting role to avoid excessive shaking and imbalance. In conjunction with the ball bearing 406 and the rotating rod 407, the resistance rod 408 can carry the wire rope to slide, avoiding excessive friction affecting the transportation stability and causing shaking and imbalance. The resistance plate 404 is fixed in the mounting shell 3 through the connecting rod 405.

[0030] Specifically, such as Figure 2 、 Figure 3 and Figure 5As shown, a resistance mechanism 5 is provided on one side of the sleeve 403, which includes a sliding plate 501, which is slidably connected to the outer wall of the sleeve 403, and a through hole 503 is opened on the inner wall of the sliding plate 501 at a position corresponding to the sleeve 403, and a fixed cylinder 502 is embedded in the outer wall of the fixed plate 402 facing the sliding plate 501. The resistance mechanism 5 also includes a damping spring 504, which is embedded in the interior of the fixed cylinder 502, and a penetration rod 505 is passed through the interior of the fixed cylinder 502. The penetration rod 505 penetrates the outer wall of one end of the fixed cylinder 502 and is fixedly installed with a limit ring 506. The sleeve 403 passes through the through hole 503 to the interior of the sliding plate 501, and a sliding structure is formed between the sliding plate 501 and the sleeve 403, and a sliding structure is formed between the limit ring 506 and the fixed cylinder 502. The fixed cylinder 502 forms an elastic structure through the damping spring 504 and the penetration rod 505.

[0031] By adopting the above technical solution, the damping spring 504 inside the fixed tube 502 elastically pushes the penetration rod 505, allowing the penetration rod 505 to resist the sliding plate 501 and slide along the sleeve 403 through the through hole 503, elastically clamping the wire rope from both sides, thereby achieving a limiting effect to avoid excessive shaking and deviation, thereby avoiding imbalance. At the same time, the penetration rod 505 is prevented from detaching from the fixed tube 502 by the limiting ring 506.

[0032] Working principle: The wire rope passes through the safety gear body 1 and then enters the installation shell 3 through the groove 2. It is then wrapped around the sleeve 403 and the outside of the resistance rod 408 in an S shape. The sleeve 403 is rotatably connected to the outside of the support rod 401. The support rod 401 is fixed inside the installation shell 3. At the same time, the fixed plate 402 is used to initially limit the wire rope to avoid deviation and cause the elevator to be unbalanced. The resistance rod 408 is rotatably connected to the resistance plate 404 through the rotating rod 407 and the ball bearing 406. The resistance plate 404 is fixed by the connecting rod 405. Inside the mounting shell 3, the fixed plate 402 limits the contact plate 404, further improving the stability of the wire rope and preventing deflection that causes the elevator to become unbalanced. The damping spring 504 inside the fixed cylinder 502 elastically pushes the exit rod 505, and the limiting ring 506 prevents the exit rod 505 from separating from the fixed cylinder 502, so that the exit rod 505 pushes the sliding plate 501 to slide along the sleeve 403 through the through hole 503, thereby elastically clamping the wire rope to prevent excessive shaking, and achieving a certain shock-absorbing effect through the damping spring 504.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-balancing elevator safety clamp, comprising a safety clamp body (1), characterized in that: A through slot (2) is provided at the lower interior of the safety clamp body (1), and a mounting shell (3) is fixedly mounted at the bottom end of the safety clamp body (1), wherein a limiting mechanism (4) is provided inside the mounting shell (3); The limiting mechanism (4) comprises a support rod (401), the support rod (401) being fixedly mounted inside the mounting shell (3), and the outer wall of the support rod (401) being sleeved with a fixing plate (402), a sleeve (403) being rotatably connected to one side of the fixing plate (402) on the outer wall of the support rod (401), and a resistance plate (404) being rotatably connected to one side of the fixing plate (402), a connecting rod (405) being fixedly mounted on the outer wall of the resistance plate (404), and a ball bearing (406) being embedded inside the resistance plate (404), a rotating rod (407) passing through the interior of the ball bearing (406), and a resistance rod (408) being fixed to one end of the rotating rod (407) passing through the ball bearing (406).

2. A self-balancing elevator safety clamp according to claim 1, characterized in that: A rotating structure is formed between the sleeve (403) and the support rod (401), and the support rod (401) penetrates the inner wall of the fixed plate (402).

3. The self-balancing elevator safety clamp according to claim 1, characterized in that: The fixed plate (402) and the contact plate (404) are tightly fitted, and the contact plate (404) forms a rotating structure with the rotating rod (407) via the ball bearing (406).

4. The self-balancing elevator safety clamp according to claim 1, characterized in that: A resistance mechanism (5) is provided on one side of the sleeve (403), and the resistance mechanism (5) includes a sliding plate (501), the sliding plate (501) is slidably connected to the outer wall of the sleeve (403), and a through hole (503) is opened on the inner wall of the sliding plate (501) at a position corresponding to the sleeve (403), and the fixing plate (402) is embedded with a fixing cylinder (502) facing the outer wall of the sliding plate (501).

5. A self-balancing elevator safety clamp according to claim 4, characterized in that: The interference mechanism (5) further comprises a damping spring (504), the damping spring (504) being embedded in the interior of the fixed cylinder (502), and a protruding rod (505) passing through the interior of the fixed cylinder (502), the protruding rod (505) passing through the outer wall of one end of the fixed cylinder (502) and fixedly mounted with a limiting ring (506).

6. The self-balancing elevator safety clamp according to claim 4, characterized in that: The sleeve (403) passes through the through hole (503) to the interior of the sliding plate (501), and a sliding structure is formed between the sliding plate (501) and the sleeve (403).

7. The self-balancing elevator safety clamp according to claim 5, characterized in that: A sliding structure is formed between the limiting ring (506) and the fixed cylinder (502), and an elastic structure is formed between the fixed cylinder (502) and the penetration rod (505) via the damping spring (504).

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