Automatic tightening device for safety sling

Abstract

The utility model discloses a safety sling automatic tightening device which comprises a motor, a tightening wheel, a tightening belt, a pull ring, a sensor and a safety pin, the motor drives the tightening wheel to rotate, one end of the tightening belt is fixed on the tightening wheel and arranged around the surface of the tightening wheel, and the other end of the tightening belt is connected with the pull ring; the safety pin is matched with a pin hole of the tightening wheel or the motor to form a mechanical locking structure; and the sensor is used for detecting the insertion state of the safety pin and is electrically connected with the motor to control alarming or shutdown. The automatic tightening device supports single / multi-machine collaborative operation, adapts to regular and irregular objects, and solves the problems of low efficiency and poor safety of traditional manual tightening. The core lies in motor-sensor closed-loop control, mechanical locking redundancy design and a modular structure, and the stability and reliability of hoisting operation are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting equipment safety technical field, especially a kind of safety sling automatic tightening device. BACKGROUND

[0002] In heavy lifting operation, in order to avoid the sudden drop of heavy in the process of lifting and transporting, for safety, generally must be twice tightening reinforcement to heavy using sling, traditional sling reinforcement relies on manual operation: workers need to repeatedly wrap sling and manually tighten, to reduce the risk of falling due to sling loosening in hoisting process. However, manual tightening has the following limitations:

[0003] Low efficiency: need more people to cooperate and time-consuming is longer;

[0004] Tightening force is unstable: due to the difference between manpower and fatigue level, each tightening effect is inconsistent;

[0005] Safety hazard: manual operation error or fatigue can cause incomplete locking, and cause safety accident. SUMMARY

[0006] In order to make up for the deficiencies of the prior art, the application provides a kind of safety sling automatic tightening device to solve the problems in the prior art.

[0007] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0008] A kind of safety sling automatic tightening device, including motor, tightening wheel, tightening band, pull ring, sensor and safety pin, the motor drives the rotation of tightening wheel, the tightening band one end is fixed to tightening wheel and is set around its surface, the other end is connected pull ring;The safety pin is matched with the pin hole of tightening wheel or motor, and forms mechanical locking structure;The sensor is used to detect the insertion state of safety pin, and is electrically connected with motor to control alarm or stop.

[0009] As a further technical scheme of the utility model: the sensor is proximity switch or microswitch, when safety pin is not inserted into pin hole, sensor triggers alarm signal.

[0010] As a further technical scheme of the utility model: the surface of the tightening wheel is provided with anti-skid lines, and the tightening band is fiber sling or steel wire rope.

[0011] As a further technical scheme of the utility model: the pull ring is annular metal structure, and is adapted to the pin shaft, hook or bolt of lifting equipment.

[0012] As a further technical scheme of the utility model: the motor is servo motor, and the output torque is adjusted by controller.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] Safety: The tightening device prevents accidental drops that could lead to quality and safety incidents;

[0015] Economic benefits: Saves over 80% of manual tightening time;

[0016] Adaptability: It can be used to tighten various items by combining one or more of these features;

[0017] Stability: The motor tightening force is stable and greater than the manual tightening force, and the tightening force is controllable each time. Attached Figure Description

[0018] Figure 1 This is an overall view of the present utility model.

[0019] Figure 2 This is a cross-sectional view of the present invention.

[0020] Figure 3 This is a schematic diagram of the lifting and tightening of this utility model.

[0021] Figure 4 This is a sectional view of the hoisting state of this utility model.

[0022] In the diagram: 1-motor, 2-tensioning wheel, 3-tensioning belt, 4-pull ring, 5-sensor, 6-safety pin. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figures 1-4 As shown, an automatic safety harness tightening device includes a motor 1, a tightening wheel 2, a tightening belt 3, a pull ring 4, a sensor 5, and a safety pin 6. The device is characterized in that the motor 1 drives the tightening wheel 2 to rotate; one end of the tightening belt 3 is fixed to the tightening wheel 2 and wrapped around its surface, while the other end is connected to the pull ring 4; the safety pin 6 engages with the pin hole of the tightening wheel 2 or the motor 1 to form a mechanical locking structure.

[0025] The design is installed on one side of the hoisting device, and the other side of the hoisting device should be designed as a structure facilitating installation of the pull ring, for example, the pull ring is passed through the middle of the pin shaft, or the pull ring is hooked by a lifting hook, etc., first, the hoisting device hoists the object to be hoisted to a height away from the ground, the pull ring is manually passed through the lower part of the hoisted object, and then is fixed through the fixing structure on the other side, then the tightening device is manually operated to drive the motor to rotate, and the tightening belt is slowly tightened, after the tightening belt is manually recognized to be tightened with the hoisting device, the motor is stopped, then the safety pin is inserted into the pin hole, and the tightening device is mechanically locked, if the safety pin is not inserted back to the original position, the sensor does not recognize it, and an alarm model is issued, finally, the hoisting device can be used to deliver the hoisted object to a suitable position, the utility model can be used for regular objects such as a circular pipe and a flat plate by using one tightening device, and for irregular or gravity center deviated objects, multiple tightening devices can be used to cooperate with tightening.

[0026] The working principle is as follows:

[0027] The design is installed on one side of the hoisting device, and the other side of the hoisting device should be designed as a structure facilitating installation of the pull ring, for example, the pull ring is passed through the middle of the pin shaft, or the pull ring is hooked by a lifting hook, etc., first, the hoisting device hoists the object to be hoisted to a height away from the ground, the pull ring is manually passed through the lower part of the hoisted object, and then is fixed through the fixing structure on the other side, then the tightening device is manually operated to drive the motor to rotate, and the tightening belt is slowly tightened, after the tightening belt is manually recognized to be tightened with the hoisting device, the motor is stopped, then the safety pin is inserted into the pin hole, and the tightening device is mechanically locked, if the safety pin is not inserted back to the original position, the sensor does not recognize it, and an alarm model is issued, finally, the hoisting device can be used to deliver the hoisted object to a suitable position, the utility model can be used for regular objects such as a circular pipe and a flat plate by using one tightening device, and for irregular or gravity center deviated objects, multiple tightening devices can be used to cooperate with tightening.

[0028] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.

[0029] Furthermore, it should be understood that although the description is made according to the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and the person skilled in the art should understand the description as a whole, and the technical solutions in each embodiment have been properly combined to form other embodiments which are easily understood by the person skilled in the art.

Claims

1. An automatic safety sling tightening device, comprising a motor (1), a tightening wheel (2), a tightening belt (3), a pull ring (4), a sensor (5), and a safety pin (6), characterized in that, The motor (1) drives the tightening wheel (2) to rotate. One end of the tightening belt (3) is fixed to the tightening wheel (2) and is arranged around its surface. The other end is connected to the pull ring (4). The safety pin (6) cooperates with the pin hole of the tightening wheel (2) or the motor (1) to form a mechanical locking structure. The sensor (5) is used to detect the insertion state of the safety pin (6) and is electrically connected to the motor (1) to control the alarm or stop.

2. The automatic safety sling tightening device according to claim 1, characterized in that, The sensor (5) is a proximity switch or a micro switch. When the safety pin (6) is not inserted into the pin hole, the sensor (5) triggers an alarm signal.

3. The automatic safety sling tightening device according to claim 2, characterized in that, The surface of the tightening wheel (2) is provided with anti-slip texture, and the tightening belt (3) is a fiber sling or a steel wire rope.

4. The automatic safety sling tightening device according to claim 3, characterized in that, The pull ring (4) is a ring-shaped metal structure, which is adapted to the pin, hook or pin (7) of the lifting equipment for fixation.

5. The automatic safety sling tightening device according to claim 1, characterized in that, The motor (1) is a servo motor, and its output torque is adjusted by a controller.

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