Tensioning structure of safety tongs lifting device

Abstract

The utility model discloses a tensioning structure of a safety gear lifting device, which comprises an elevator car running in an elevator shaft, a safety gear arranged at the bottom of the elevator car and a lifting steel wire rope matched with the safety gear, a speed limiting wheel is arranged at the upper part of the elevator shaft, a diversion sheave is arranged in a bottom pit of the elevator shaft, and the lifting steel wire rope is arranged in the elevator shaft. A first steering wheel, a second steering wheel and a third steering wheel are mounted on one side of an elevator car running route in an elevator shaft, and a tensioning wheel is mounted on the heavy hammer. By adopting the side tensioning structure, the pit of the elevator shaft only needs to meet the necessary height required by the safety tongs lifting device and the diversion sheave, other accessories for lifting the steel wire rope tensioning device do not occupy the space of the pit, and the problem that the safety tongs cannot be lifted easily when an elevator car runs is effectively solved. The safety tongs lifting device solves the problems of space conflict and interference between the safety tongs lifting device and the tensioning device for lifting the steel wire rope, and is simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator equipment, in particular to a tensioning structure of a safety clamp lifting device. Background Art

[0002] With the progress of society, people's living standards are constantly improving, and the number of elevators installed in old buildings is increasing. The location of the installed elevator is generally near the stairwell. The elevator shaft excavation pit is easy to touch the water pipes, wires, communications, natural gas pipelines, etc. Therefore, the elevator shaft pit for installing the elevator is shallow, and the car safety clamp is generally installed under the car, and the safety clamp lifting device is also located under the car. When the car is leveled on the ground floor, the lifting device is located in the pit, and the tensioning device of the lifting wire rope matched with the safety clamp lifting device also has a certain height, which is easy to interfere with the lifting device when the car is running, affecting the normal operation of the elevator. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a tensioning structure for a safety clamp lifting device to solve the problem of space conflict between the safety clamp lifting device and the lifting wire rope tensioning device caused by the shallow bottom pit of the elevator shaft in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a tensioning structure of a safety clamp lifting device, including an elevator car running in an elevator shaft, a safety clamp installed at the bottom of the elevator car, and a lifting wire rope matched with the safety clamp, a speed limiting wheel is installed on the upper part of the elevator shaft, a reverse rope pulley is installed in the bottom pit of the elevator shaft, a first steering wheel, a second steering wheel and a third steering wheel are installed on one side of the elevator shaft located on the running route of the elevator car, and also includes a weight, and a tensioning wheel is installed on the weight; the lifting wire rope extends downward from the safety clamp, bypasses the speed limiting wheel upward, then bypasses the first steering wheel and extends in a direction away from the elevator car, then bypasses the second steering wheel and extends downward, then bypasses the tensioning wheel and extends upward, then bypasses the third steering wheel and extends downward, and then bypasses the reverse rope pulley and extends upward to the safety clamp.

[0005] As an optimization, the first steering wheel and the third steering wheel are arranged opposite to each other up and down, the second steering wheel and the third steering wheel are arranged horizontally, and the second steering wheel is located on the side of the third steering wheel away from the running route of the elevator car.

[0006] As an optimization, a striker bow is installed on the weight, and an upper limit switch and a lower limit switch are installed in the elevator shaft. The upper limit switch and the lower limit switch are respectively connected in series to the operating circuit of the elevator car. When the weight moves up and down, the striker bow can contact the upper limit switch or the lower limit switch to disconnect the operating circuit of the elevator car.

[0007] Compared with the prior art, the utility model has the following advantages: by adopting a side-mounted tensioning structure, the pit of the elevator shaft only needs to meet the necessary height required by the safety clamp lifting device and the anti-rope pulley, and other accessories of the lifting wire rope tensioning device do not occupy the pit space, which effectively solves the spatial conflict and interference problem between the safety clamp lifting device and the lifting wire rope tensioning device when the elevator car is running, and has a simple structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 It is a partial schematic diagram of the utility model;

[0010] In the figure: 1 elevator car, 2 safety clamp, 3 pulling wire rope, 4 speed limiting wheel, 5 anti-rope wheel, 6 first steering wheel, 7 second steering wheel, 8 third steering wheel, 9 weight, 10 tensioning wheel, 11 striker, 12 upper limit switch, 13 lower limit switch. DETAILED DESCRIPTION

[0011] The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0013] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] Example: See Figure 1-Figure 2, a tensioning structure of a safety clamp lifting device, comprising an elevator car 1 running in an elevator shaft, a safety clamp 2 installed at the bottom of the elevator car 1, and a lifting wire rope 3 matched with the safety clamp 2. Specifically, the elevator car 1 runs on the vertical elevator guide rails of the elevator shaft through components such as a traction machine, a traction wire rope, and a counterweight. Safety clamps 2 matched with the elevator guide rails are installed on both sides of its bottom. The safety clamp 2 can clamp the elevator guide rails under the action of a lifting device to achieve emergency braking of the elevator car 1. The lifting device is controlled by the lifting wire rope 3. The lifting wire rope 3 moves with the operation of the elevator car 1 through an independent tensioning device. When the speed of the speed limiting wheel 4 exceeds the set value, the speed limiting wheel 4 stops rotating, so that the lifting wire rope 3 pulls the lifting device to activate the safety clamp 2. In this embodiment, a speed limiting wheel 4 is installed on the upper part of the elevator shaft, a return rope pulley 5 is installed in the bottom pit of the elevator shaft, and a first steering wheel 6, a second steering wheel 7 and a third steering wheel 8 are installed on one side of the elevator shaft located on the running route of the elevator car 1, and also include a weight 9, and a tensioning wheel 10 is installed on the weight 9; the pulling wire rope 3 is passed upward by the safety clamp 2 around the speed limiting wheel 4 and then extends downward, then passes around the first steering wheel 6 and extends in the direction away from the elevator car 1, then passes around the second steering wheel 7 and then extends downward, then passes around the tensioning wheel 10 and then extends upward, then passes around the third steering wheel 8 and then extends downward, and then passes around the return rope pulley 5 and then extends upward to the safety clamp 2.

[0015] Among them, the first steering wheel 6 and the third steering wheel 8 are arranged opposite to each other up and down, the second steering wheel 7 and the third steering wheel 8 are arranged horizontally, and the second steering wheel 7 is located on the side of the third steering wheel 8 away from the running route of the elevator car 1. Specifically, the first steering wheel 6, the second steering wheel 7 and the third steering wheel 8 can be safely mounted on a fixed plate, and the fixed plate can be fixed in the pit through a support frame, or can be fixed on the wall of the elevator shaft, or can be directly connected to the elevator guide rail, or other installation methods are adopted. The tensioning wheel 10 is also installed on the fixed plate, and specifically adopts a sliding matching installation method so that it can move up and down as a movable pulley. It is connected to the heavy hammer 9. When the length of the pulling wire rope 3 changes under the influence of factors such as temperature and humidity, the pulling wire rope 3 is kept in a taut state under the action of the heavy hammer 9.

[0016] Furthermore, in order to prevent the lifting wire rope 3 from abnormally expanding and contracting beyond the safety limit, a striker bow 11 is installed on the weight 9, and an upper limit switch 12 and a lower limit switch 13 are installed in the elevator shaft. The upper limit switch 12 and the lower limit switch 13 are respectively connected in series in the operating circuit of the elevator car 1. When the weight 9 moves up and down, the striker bow 11 can contact the upper limit switch 12 or the lower limit switch 13 to disconnect the operating circuit of the elevator car 1, thereby ensuring safe use.

[0017] The utility model adopts a side-mounted tensioning structure, so that the bottom pit of the elevator shaft only needs to meet the necessary height required by the safety clamp lifting device and the anti-rope pulley, and other accessories of the lifting wire rope tensioning device do not occupy the bottom pit space, which effectively solves the spatial conflict and interference problem between the safety clamp lifting device and the tensioning device of the lifting wire rope when the elevator car is running. The utility model has a simple structure and is easy to install.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution should be included in the scope of the claims of the utility model.

Claims

1. A tensioning structure of a safety clamp lifting device, comprising an elevator car running in an elevator shaft, a safety clamp installed at the bottom of the elevator car, and a lifting wire rope matched with the safety clamp, characterized in that: A speed limiting wheel is installed at the upper part of the elevator shaft, a reverse rope wheel is installed in the bottom pit of the elevator shaft, a first steering wheel, a second steering wheel and a third steering wheel are installed on one side of the elevator shaft located on the running route of the elevator car, and also includes a weight, and a tensioning wheel is installed on the weight; the pulling wire rope passes upward from the safety clamp around the speed limiting wheel and then extends downward, then passes around the first steering wheel and then extends in the direction away from the elevator car, then passes around the second steering wheel and then extends downward, then passes around the tensioning wheel and then extends upward, then passes around the third steering wheel and then extends downward, then passes around the reverse rope wheel and then extends upward to the safety clamp.

2. A tensioning structure for a safety clamp lifting device according to claim 1, characterized in that: The first steering wheel and the third steering wheel are arranged opposite to each other up and down, the second steering wheel and the third steering wheel are arranged horizontally, and the second steering wheel is located on the side of the third steering wheel away from the running route of the elevator car.

3. A tensioning structure for a safety clamp lifting device according to claim 1, characterized in that: A striker bow is installed on the weight, and an upper limit switch and a lower limit switch are installed in the elevator shaft. The upper limit switch and the lower limit switch are respectively connected in series to the operating circuit of the elevator car. When the weight moves up and down, the striker bow can contact the upper limit switch or the lower limit switch to disconnect the operating circuit of the elevator car.

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