A safety lifting device automatic adjustment system

Abstract

The application discloses a kind of automatic adjustment systems of safety lifting device, including lifting mechanism and safety mechanism;The lifting mechanism includes lifting arm, hinge and lifting rod;The lifting arm is proportionally divided into long lifting arm and short lifting arm;The long lifting arm is linked between the short lifting arm by the hinge;The safety mechanism is connected with the short lifting arm by the lifting rod;When encountering interference resistance during lifting, the long lifting arm and the short lifting arm are automatically adjusted by the hinge between the required angle acting on the lifting rod to lift the safety mechanism to overcome resistance moment.The application optimizes the structure of lifting arm, avoids the interference caused by abnormal lifting during the action of safety tongs, promotes safe and stable lifting, ensures the safety brake and reset of safety tongs;The application has compact structure, high stability and is easy to install.

Description

Technical Field

[0001] This invention relates to the field of elevator equipment technology, and in particular to an automatic adjustment system for a safety lifting device. Background Technology

[0002] An automatic adjustment system for the safety lifting device of an elevator is primarily designed to ensure that during the lifting of the safety gear, misassembly or improper installation leading to issues with the lifting arm length prevents the safety gear from being lifted synchronously, safely, and effectively. It also prevents undue interference between the safety gear and other shaft components during the lifting process, ensuring the elevator's safe, reliable, and stable braking. (Refer to...) Figure 4 Currently, for heavy-duty safety clamps, the length of the lifting arm frequently causes abnormal interference between the pull rod and the mounting holes on the clamp seat plate during lifting. Abnormal interference during the lifting process can easily cause the lifting rod to jam momentarily, resulting in insufficient travel and failure to lift the safety clamp, thus preventing braking. Furthermore, due to the small amplitude and large instantaneous movement during the lifting action, abnormal interference can easily cause the safety clamp pull rod to bend, hindering installation and maintenance. Therefore, it is necessary to reduce the risks associated with lifting the safety clamp using the lifting arm, fully utilize its lifting characteristics, optimize the lifting arm structure, avoid jamming or insufficient travel during the lifting process, and ensure safe lifting.

[0003] Currently, the heavy-duty safety clamp is lifted using a broken-arm linkage lifting rod with an arc-shaped lifting motion. While this structure effectively saves shaft space and optimizes shaft configuration, limitations in the lifting rod length can lead to insufficient lifting stroke, abnormal interference during lifting causing uneven clamp lifting, or excessive lifting action resulting in deformation of related components. These issues can easily cause malfunctions in the field, impacting product reputation and brand image. Furthermore, this structure makes replacing the lifting arm more complex and difficult, and inconvenient to operate. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic adjustment system for a safety lifting device that is compact in structure, highly stable, and easy to install.

[0005] This invention is achieved through the following technical solution:

[0006] An automatic adjustment system for a safety lifting device includes a lifting mechanism and a safety mechanism; wherein: the lifting mechanism includes a lifting arm, a hinge, and a lifting rod; the lifting arm is proportionally divided into a long lifting arm and a short lifting arm; the long lifting arm and the short lifting arm are connected by the hinge; the safety mechanism is connected to the short lifting arm via the lifting rod; when interference resistance is encountered during the lifting process, the long lifting arm and the short lifting arm automatically adjust the required angle to act on the lifting rod to overcome the resistance torque, thereby lifting the safety mechanism.

[0007] Furthermore, the safety mechanism is a safety clamp.

[0008] Furthermore, the safety clamp is a single-lift double-wedge safety clamp.

[0009] Furthermore, the hinge is a torque hinge.

[0010] Furthermore, the arm length of the long lifting arm is greater than the arm length of the short lifting arm.

[0011] The beneficial effects of this invention are:

[0012] (1) This invention does not add connecting parts between the lifting mechanism and the safety clamp, which fully reduces the transmission resistance during the transmission process, optimizes the lifting arm structure, avoids interference and unsmooth lifting caused by abnormal lifting during the lifting of the safety clamp, promotes safe and stable lifting, and ensures the safe braking and reset of the safety clamp.

[0013] (2) To prevent the safety clamp lever from interfering with the lifting hole on the upper plate of the clamp seat during the lifting process due to the length of the lifting arm.

[0014] (3) Prevent the safety clamp from jamming during the lifting process, which would result in insufficient lifting stroke and failure to brake.

[0015] (4) Prevent irreversible deformation of the safety clamp lever during the lifting process caused by large lifting movements. Attached Figure Description

[0016] Figure 1 This is an installation diagram of the automatic adjustment system of the safety lifting device according to an embodiment of the present invention;

[0017] Figure 2 This is one of the schematic diagrams of the integrated lifting mechanism of this invention.

[0018] Figure 3 This is the second schematic diagram of the integrated lifting mechanism of this invention.

[0019] Figure 4 This is a schematic diagram of the transmission principle in existing technology.

[0020] In the attached diagram: 1-Lifting mechanism; 2-Long lifting arm; 3-Short lifting arm; 4-Hinge; 5-Lifting rod; 6-Safety clamp. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] In this invention, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0025] Reference Figures 1 to 3 An automatic adjustment system for a safety lifting device includes a lifting mechanism 1 and a safety mechanism; wherein: the lifting mechanism 1 includes a lifting arm, a hinge 4, and a lifting rod 5; the lifting arm is proportionally divided into a long lifting arm 2 and a short lifting arm 3; the long lifting arm 2 and the short lifting arm 3 are connected by the hinge 4; the safety mechanism is connected to the short lifting arm 3 through the lifting rod 5; when interference resistance is encountered during the lifting process, the long lifting arm 2 and the short lifting arm 3 automatically adjust the required angle to the lifting rod 5 through the hinge 4 to overcome the resistance torque, thereby lifting the safety mechanism.

[0026] Specifically, in this embodiment, the safety mechanism is a safety clamp 6.

[0027] Specifically, in this embodiment, the safety clamp 6 is a single-lifting double-wedge safety clamp.

[0028] Specifically, in this embodiment, the hinge 4 is a torque hinge.

[0029] Specifically, in this embodiment, the arm length of the long lifting arm 2 is greater than the arm length of the short lifting arm 3.

[0030] It should be noted that during the lifting action of the counterweight safety clamp, the length of the existing lifting arm can cause abnormal interference between the pull rod and the mounting hole on the upper plate of the clamp seat when the safety clamp is lifted on the construction site. This can easily cause the safety clamp to move asynchronously or fail to lift.

[0031] Abnormal interference during the lifting process can easily cause the lifting rod to jam momentarily, resulting in insufficient travel of the safety clamp and failure to brake. Because the lifting action is small in amplitude but large in instantaneous movement, abnormal interference can easily cause the safety clamp rod to bend, which is detrimental to installation and maintenance.

[0032] Specifically, in one embodiment:

[0033] The automatic adjustment system of the safety lifting device includes a lifting arm, a hinge 4, a lifting rod 5, and a safety clamp 6. The lifting arm is divided into two sections (a long lifting arm 2 and a short lifting arm 3) in a certain proportion, connected in the middle by the hinge 4. The safety clamp 6 is connected to the lifting arm 3 via the lifting rod 5.

[0034] The safety clamp 6 is connected to and positioned below the lifting rod 5. As the angles of the long lifting arm 2 and the short lifting arm 3 are adjusted, the safety clamp 6 moves up and down vertically.

[0035] The lifting arm is divided into a long lifting arm 2 and a short lifting arm 3 in a certain proportion and connected by a torque hinge 4. During the lifting process, the lifting arm is adjusted to the required angle according to the force of overcoming the torque hinge 4 to avoid abnormal interference.

[0036] The lifting rod 5 is connected to the safety clamp 6, which plays a lifting role during the elevator's overspeed operation.

[0037] The hinge 4 connects the long lifting arm 2 and the short lifting arm 3, and also contains a torque setting.

[0038] The working process of the automatic adjustment system of the safety lifting device described in this embodiment is as follows:

[0039] The total length of the two lifting arms (long lifting arm 2 and short lifting arm 3) and the hinge 4 is slightly greater than that of a whole lifting arm (original design length). When interference resistance is encountered during the lifting process, the hinge 4 overcomes the resistance torque and automatically adjusts the length of the entire lifting arm to form the required angle to act on the lifting rod 5, thereby lifting the safety clamp 6.

[0040] The lifting arms (long lifting arm 2 and short lifting arm 3) automatically adjust their angles via the resistance torque of the hinge 4 to ensure vertical up-and-down movement during the lifting process, guaranteeing the safe braking and resetting of the safety clamp 6. Since the rotation of the automatic adjustment system 1 of the safety lifting device involves only the long lifting arm 2 and short lifting arm 3 overcoming the resistance torque of the hinge 4 to form the lifting angle, and no other components cause transmission losses, vertical lifting is achieved. This ensures safe and stable lifting while avoiding abnormal interference that could lead to malfunctions.

[0041] This invention eliminates the connecting components between the lifting mechanism and the safety clamp, significantly reducing transmission resistance during the transmission process. It optimizes the lifting arm structure, preventing interference and uneven lifting caused by abnormal lifting during the safety clamp's operation, thus promoting safe and stable lifting and ensuring the safety clamp's safe braking and reset. It also prevents interference between the safety clamp lever and the lifting hole on the upper plate of the clamp seat due to the length of the lifting arm. Furthermore, it prevents the safety clamp from jamming during the lifting process, which could result in insufficient lifting stroke and failure to brake. Finally, it prevents irreversible deformation of the safety clamp lever during the lifting process caused by excessive lifting action.

[0042] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An automatic adjustment system for a safety lifting device, comprising a lifting mechanism and a safety mechanism, characterized in that: The lifting mechanism includes a lifting arm, a hinge, and a lifting rod. The lifting arm is divided into a long lifting arm and a short lifting arm, with the length of the long lifting arm being greater than that of the short lifting arm. The long lifting arm and the short lifting arm are connected by the hinge, which is a torque hinge. The safety mechanism is a single-lifting double-wedge safety clamp, which is connected to the short lifting arm via the lifting rod. When interference resistance is encountered during the lifting process, the long lifting arm and the short lifting arm automatically adjust to the required angle by overcoming the resistance torque through the torque hinge, thereby acting on the lifting rod to lift the single-lifting double-wedge safety clamp.

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