Lifting height limiting alarm device and lifting device with same

Abstract

The utility model discloses a lifting height limit alarm device and a lifting device with the same, the lifting height limit alarm device comprises a laser sensor, a rotating mechanism and a linear motion mechanism, the laser sensor is arranged on the rotating mechanism, the rotating mechanism is used for adjusting the laser emitting direction of the laser sensor, and the linear motion mechanism is used for adjusting the laser emitting direction of the laser sensor. The laser emitting direction of the laser sensor faces the first position where a steel wire rope in the lifting device is located, the steel wire rope is configured to lift goods under the driving of a winding drum, and the first position is the position where the steel wire rope is located when the goods are lifted to the target height; the rotating mechanism is arranged on the linear motion mechanism, the linear motion mechanism is configured to drive the rotating mechanism and the laser sensor to do linear motion in the first direction, and the first direction is parallel to the axis of the winding drum. The lifting height limiting alarm device is high in flexibility and reliable in detection result.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, in particular to a lifting height limit alarm device and a lifting device with the same. Background Art

[0002] In the field of industrial production, as an important material handling equipment, cranes are widely used in operation links such as process transfer equipment, lifting, handling, and landing of materials. However, there are many potential safety hazards in the existing crane operation methods. The cab of the crane is usually located at a relatively high position, and it is difficult for the driver in the cab to comprehensively understand the ground situation. This seriously obstructs the driver's line of sight when operating the goods to be lifted or lowered to a fixed position.

[0003] To make up for this deficiency, the current operation mode often requires the real-time instruction cooperation of ground signalmen, who remotely inform the driver of the lifting height and lowering height of the goods to complete precise hoisting, landing and other operations. However, in the industrial production site, the environment is noisy, and this noise interference factor will seriously affect the communication between the driver and the ground commanders. Once the communication information cannot be conveyed in a timely and accurate manner, production safety accidents may occur.

[0004] In view of the crane operation mode that relies on manual cooperation and is affected by the environment, its safety cannot be effectively guaranteed. Therefore, the detection, limit and alarm technologies for the lifting height of cranes have also been widely studied. For example, the Chinese patent application with the application number 2016103487418 proposes to detect the real-time height of the system through a height detector to determine the current height of the system. This technical solution requires installing a height detector on the lower side of the system, which not only has limited application scenarios, but also has complex signal conversion. For another example, the Chinese patent application with the application number 2022102813928 proposes to determine the height of the lifted object from the ground according to the load-bearing weight of the hook, which also requires complex calculation relationships and has the problem of insufficient real-time responsiveness.

[0005] There are also some methods that control the lifting height by taking shaft head limit or weight limit on the hoisting drum. However, after long-term use, such mechanical limit devices are prone to failure, resulting in the hook head rising beyond the safe distance and causing a piercing accident. In addition, if the requirement for the lifting height changes, it is necessary to re-manufacture or install the lifting height limit device, and the flexibility is insufficient.

[0006] The disclosure of the above background art content is only used to assist in understanding the concept and technical solution of the present utility model, and it does not necessarily belong to the prior art of this application, nor does it necessarily give technical guidance; without clear evidence that the above content was publicly available before the filing date of this application, the above background art should not be used to evaluate the novelty and creativity of this application. Summary of the Invention

[0007] The object of the present utility model is to provide a lifting height limit alarm device and a lifting device having the same, which have high flexibility and reliable detection results.

[0008] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0009] A lifting height limit alarm device includes a laser sensor, a rotating mechanism and a linear motion mechanism. The laser sensor is disposed on the rotating mechanism. The rotating mechanism is used to adjust the laser emission direction of the laser sensor. The laser emission direction of the laser sensor faces a first position where the steel wire rope in the lifting device is located. The steel wire rope is configured to lift goods under the drive of a hoisting drum. The first position is the position where the steel wire rope is located when the goods are lifted to the target height.

[0010] The rotating mechanism is disposed on the linear motion mechanism. The linear motion mechanism is configured to drive the rotating mechanism and the laser sensor to linearly move in a first direction. The first direction is parallel to the axis line of the hoisting drum.

[0011] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the rotating mechanism includes an upper support and a lower support. The upper support is selectively rotatable relative to the lower support about a virtual axis. The virtual axis is parallel to the axis line of the hoisting drum.

[0012] The laser sensor is disposed on the upper support. The lower support is disposed on the linear motion mechanism.

[0013] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the upper support includes an upper support plate and a first side plate connected to each other. An arc-shaped hole is provided on the first side plate.

[0014] The lower support includes a lower support plate and a second side plate connected to each other. A first shaft member is provided on the second side plate.

[0015] The upper support plate and the lower support plate are rotatably connected by a second shaft member. The center of the arc-shaped hole is on the axis line of the second shaft member, and the first shaft member is disposed in the arc-shaped hole.

[0016] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the laser sensor includes a light-shielding and heat-dissipating structure disposed on its lens.

[0017] The light-shielding and heat-dissipating structure includes one or more light-shielding plates, which are arranged on the lens of the laser sensor through the first fasteners, and the light-shielding plates are provided with through holes for the laser to pass through.

[0018] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the number of the light-shielding plates is multiple, and there are gaps between the multiple light-shielding plates;

[0019] The size of the outermost light-shielding plate relative to the lens of the laser sensor is larger than that of other light-shielding plates.

[0020] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the linear motion mechanism includes a slider, a lead screw, a slide rail, a nut and a motor. The output shaft of the motor is connected to the lead screw to drive the lead screw to rotate, and the lead screw and the nut are in transmission connection;

[0021] The nut is fixedly connected to the slider, the slider is slidably connected to the slide rail, and the extending direction of the slide rail is parallel to the axis line of the hoisting drum.

[0022] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the rotating mechanism is arranged on the slider.

[0023] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the rotating mechanism includes a lower support, and a kidney-shaped hole is arranged on the lower support. The lower support is installed on the slider by passing the second fastener through the kidney-shaped hole.

[0024] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the laser sensor is arranged below the hoisting drum, and the distance between the height of the lens of the laser sensor and the height of the axis line of the hoisting drum is 0 cm to 50 cm.

[0025] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the hoisting drum is arranged on the mounting frame, and the linear motion mechanism is also arranged on the mounting frame; and / or,

[0026] It further includes a prompting device and a controller. The prompting device is electrically connected to the laser sensor. When the laser sensor detects the steel wire rope, it sends an electrical signal to the controller, and the controller controls the prompting device to send a prompting signal in response to receiving the electrical signal.

[0027] According to another aspect of the present utility model, there is provided a lifting device with a lifting height limit alarm device. The lifting device includes a winch drum, a steel wire rope wound around the winch drum, and the lifting height limit alarm device according to any one or a combination of the above technical solutions. The lifting height limit alarm device is configured to detect whether the position of the steel wire rope on the winch drum reaches a target position.

[0028] The beneficial effects brought by the technical solutions provided by the present utility model are as follows:

[0029] a. When the steel wire rope drives the goods to rise or fall to a certain height, the winding position of the steel wire rope on the winch drum is also unique and fixed, i.e., the first position. When the steel wire rope reaches the first position, the laser sensor can detect the steel wire rope; otherwise, the laser sensor cannot detect the steel wire rope. Based on this principle, it is possible to cleverly detect whether the height of the lifted goods reaches the target height to emit an alarm prompt signal. The lifting height limit alarm device has a simple structure and reliable detection results.

[0030] b. By adjusting the angle of the emitted laser of the laser sensor towards the steel wire rope through the rotating mechanism and adjusting the position of the laser sensor on the parallel line of the axis of the winch drum by the linear motion mechanism, when the target height of the lifted goods changes, it is only necessary to correspondingly adjust the position of the laser sensor, which is convenient, flexible and highly adaptable.

[0031] c. By providing a plurality of light-shielding plates on the lens of the laser sensor, it has the functions of shielding strong light and heat dissipation, which can improve the reliability of detection and extend the service life of the laser sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 A three-dimensional schematic diagram of the lifting height limit alarm device for detecting the position of the steel wire rope on the winch drum provided for an exemplary embodiment of the present utility model;

[0034] Figure 2 A three-dimensional schematic diagram of the first angle of the lifting height limit alarm device provided for an exemplary embodiment of the present utility model;

[0035] Figure 3A three-dimensional schematic diagram of the second angle of the lifting height limit alarm device provided for an exemplary embodiment of the present utility model;

[0036] Figure 4 A top view schematic diagram of the lifting height limit alarm device provided for an exemplary embodiment of the present utility model;

[0037] Figure 5 A side view schematic diagram of the lifting height limit alarm device provided for an exemplary embodiment of the present utility model.

[0038] Description of the drawings: 1 - Laser sensor, 11 - Light-shielding plate, 12 - First fastener, 2 - Rotating mechanism, 21 - Upper support, 211 - Arc-shaped hole, 212 - Upper support plate, 213 - First side plate, 22 - Lower support, 221 - Lower support plate, 222 - Second side plate, 3 - Linear motion mechanism, 31 - Slide block, 32 - Lead screw, 33 - Slide rail, 34 - Nut, 4 - Hoisting drum, 41 - Steel wire rope, 5 - Mounting bracket. Detailed implementation manners

[0039] In order to enable those skilled in the art of the present technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0041] In an embodiment of the present utility model, a lifting height limit alarm device is provided, as Figures 1 to 5As shown in the figure, the lifting height limit alarm device includes a laser sensor 1, a rotating mechanism 2, and a linear motion mechanism 3. The laser sensor 1 is arranged on the rotating mechanism 2, and the rotating mechanism 2 is used to adjust the laser emission direction of the laser sensor 1. The laser emission direction of the laser sensor 1 faces the first position where the steel wire rope 41 in the hoisting device is located. The steel wire rope 41 is configured to lift goods under the drive of the hoisting drum 4. Among them, the first position is the position where the steel wire rope 41 is located when the target goods are lifted (raised or lowered) to the target height.

[0042] The rotating mechanism 2 is arranged on the linear motion mechanism 3, and the linear motion mechanism 3 is configured to drive the rotating mechanism 2 and the laser sensor 1 to move linearly in the first direction, and the first direction is parallel to the axis line of the hoisting drum 4.

[0043] Preferably, the hoisting drum 4 is arranged on the mounting frame 5, and the linear motion mechanism 3 is also arranged on the mounting frame 5. The laser sensor 1 is arranged below the hoisting drum 4, and the distance between the height where the lens of the laser sensor 1 is located and the height where the axis line of the hoisting drum 4 is located is 5 cm to 50 cm. Within this height range, when the steel wire rope 41 is wound around the hoisting drum 4 to the first position, even if the steel wire rope 41 has a certain rotation and vibration, the laser sensor 1 can still reliably detect the steel wire rope 41.

[0044] In this embodiment, the lifting height limit alarm device further includes a prompting device and a controller. The prompting device is electrically connected to the laser sensor 1. When the laser sensor detects the steel wire rope, it sends an electrical signal to the controller. The controller controls the prompting device to send a prompting signal in response to receiving the electrical signal, such as an audible prompting signal and / or a light prompting signal.

[0045] The utility model utilizes the fact that when the steel wire rope drives the goods to rise or fall to a certain height (target height), the winding position of the steel wire rope on the hoisting drum is also unique and fixed, that is, the steel wire rope will be in the first position. When the steel wire rope reaches the first position, the laser sensor can detect the steel wire rope. Otherwise, the laser sensor cannot detect the steel wire rope. Based on this principle, it can cleverly detect whether the height of the lifted goods reaches the target height to send an alarm prompting signal. The lifting height limit alarm device has a simple structure and reliable detection results.

[0046] In addition, the utility model adjusts the angle of the emitted laser of the laser sensor by the rotating mechanism and adjusts the position of the laser sensor on the parallel line of the axis line of the hoisting drum by the linear motion mechanism. When the target height of the lifted goods changes, only the position of the laser sensor needs to be adjusted accordingly, which is convenient, flexible, and highly adaptable.

[0047] In an embodiment of the present utility model, the rotating mechanism 2 includes an upper support 21 and a lower support 22. The upper support 21 is selectively rotatable relative to the lower support 22 about a virtual axis, and the virtual axis is parallel to the axis line of the hoisting drum 4. The laser sensor 1 is disposed on the upper support 21, and the lower support 22 is disposed on the linear motion mechanism 3.

[0048] Wherein, the upper support 21 includes an upper support plate 212 and a first side plate 213 which are connected to each other. An arc-shaped hole 211 is formed on the first side plate 213, and the center of the arc-shaped hole 211 is on the virtual axis. The lower support 22 includes a lower support plate 221 and a second side plate 222 which are connected to each other. A first shaft member is disposed on the second side plate 222. The upper support plate 212 and the lower support plate 221 are rotationally connected through a second shaft member, and the axis line of the second shaft member coincides with the virtual axis. Specifically, hole structures for mating connection with the second shaft member are correspondingly formed on the first side plate 213 and the second side plate 222. The center of the arc-shaped hole 211 is on the axis line of the second shaft member, and the first shaft member is disposed in the arc-shaped hole 211. A fastener can be used to fix the first shaft member at any position in the arc-shaped hole 211, thereby realizing the adjustment of the laser emission direction of the laser sensor. It should be noted that the advantage of the rotation connection structure of the upper support 21 and the lower support 22 around a virtual axis provided in this embodiment lies in its simple structure and low manufacturing cost. In other embodiments, the upper support 21 and the lower support 22 can also be rotationally connected around a virtual axis through mechanisms such as gears or ratchet teeth.

[0049] In an embodiment of the present utility model, the linear motion mechanism 3 includes a slider 31, a lead screw 32, a slide rail 33, a nut 34 and a motor. The output shaft of the motor is connected to the lead screw 32 to drive the lead screw 32 to rotate, and the lead screw 32 is in transmission connection with the nut 34. The nut 34 is fixedly connected to the slider 31, the slider 31 is slidably connected to the slide rail 33, and the extending direction of the slide rail 33 is parallel to the axis line of the hoisting drum 4. The rotating mechanism 2 is disposed on the slider 31. The rotating mechanism 2 includes a lower support 22, and a kidney-shaped hole is formed on the lower support 22. The lower support 22 is mounted on the slider 31 by passing a second fastener through the kidney-shaped hole.

[0050] In an embodiment of the present utility model, the laser sensor 1 includes a light-shielding and heat-dissipating structure provided on its lens; the light-shielding and heat-dissipating structure includes one or more light-shielding plates 11, the light-shielding plates 11 are arranged on the lens of the laser sensor 1 through first fasteners 12, and the light-shielding plates 11 are provided with through holes for the laser to pass through. The number of the light-shielding plates 11 is multiple, and gaps are provided between the multiple light-shielding plates 11; the size of the outermost light-shielding plate 11 relative to the lens of the laser sensor 1 is larger than that of the other light-shielding plates 11. Given that the scenario of lifting goods is generally outdoors where there is sufficient sunlight, high temperature in summer, and strong light may be reflected onto the laser sensor when sunlight shines on products such as glass and steel plates, affecting the detection results. Therefore, the present utility model has a light-shielding and heat-dissipating function by arranging multiple light-shielding plates on the lens of the laser sensor, which can improve the detection reliability and extend the service life of the laser sensor.

[0051] In an embodiment of the present utility model, a lifting device with a lifting height limit alarm device is provided, as Figure 1 shown. The lifting device includes a hoisting drum 4, a steel wire rope 41 wound around the hoisting drum 4, and the lifting height limit alarm device as described in any one of the above embodiments. The lifting height limit alarm device is configured to detect whether the position of the steel wire rope 41 on the hoisting drum 4 reaches the target position.

[0052] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0053] The above are only specific embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A lifting height limit alarm device, characterized in that: The invention comprises a laser sensor (1), a rotating mechanism (2) and a linear motion mechanism (3), wherein the laser sensor (1) is arranged on the rotating mechanism (2), and the rotating mechanism (2) is used to adjust the laser emission direction of the laser sensor (1), wherein the laser emission direction of the laser sensor (1) is directed toward a first position where a steel wire rope (41) in the lifting device is located, wherein the steel wire rope (41) is configured to lift goods under the drive of a winch drum (4), and the first position is the position where the steel wire rope (41) is located when the goods are lifted to a target height; The rotating mechanism (2) is arranged on the linear motion mechanism (3), and the linear motion mechanism (3) is configured to drive the rotating mechanism (2) and the laser sensor (1) to move linearly in a first direction, wherein the first direction is parallel to the axis of the hoisting drum (4).

2. The lifting height limit alarm device according to claim 1 is characterized in that: The rotating mechanism (2) comprises an upper support (21) and a lower support (22), wherein the upper support (21) can selectively rotate relative to the lower support (22) around a virtual axis, wherein the virtual axis is parallel to the axis center line of the hoist drum (4); The laser sensor (1) is arranged on the upper support (21), and the lower support (22) is arranged on the linear motion mechanism (3).

3. The lifting height limit alarm device according to claim 2 is characterized in that: The upper support (21) comprises an upper support plate (212) and a first side plate (213) which are connected to each other, and the first side plate (213) is provided with an arc-shaped hole (211); The lower support (22) comprises a lower support plate (221) and a second side plate (222) which are connected to each other, and the second side plate (222) is provided with a first shaft member; The upper support plate (212) and the lower support plate (221) are rotatably connected via a second shaft member, the center of the arc-shaped hole (211) is on the axis of the second shaft member, and the first shaft member is arranged in the arc-shaped hole (211).

4. The lifting height limit alarm device according to claim 1 is characterized in that: The laser sensor (1) comprises a light shielding and heat dissipation structure arranged on its lens; The light shielding and heat dissipation structure comprises one or more light shielding plates (11), wherein the light shielding plates (11) are arranged on the lens of the laser sensor (1) via a first fastener (12), and the light shielding plates (11) are provided with through holes for laser to pass through.

5. The lifting height limit alarm device according to claim 4 is characterized in that: The number of the shading plates (11) is multiple, and gaps are provided between the multiple shading plates (11); The size of the shading plate (11) at the outermost side relative to the lens of the laser sensor (1) is larger than the size of the other shading plates (11).

6. The lifting height limit alarm device according to claim 1 is characterized in that: The linear motion mechanism (3) comprises a slider (31), a screw rod (32), a slide rail (33), a nut (34) and a motor, wherein the output shaft of the motor is connected to the screw rod (32) to drive the screw rod (32) to rotate, and the screw rod (32) and the nut (34) are in driving connection; The nut (34) is fixedly connected to the slider (31), the slider (31) is slidably connected to the slide rail (33), and the extension direction of the slide rail (33) is parallel to the axis of the hoist drum (4).

7. The lifting height limit alarm device according to claim 6 is characterized in that: The rotating mechanism (2) is arranged on the sliding block (31).

8. The lifting height limit alarm device according to claim 7 is characterized in that: The rotating mechanism (2) comprises a lower support (22), the lower support (22) being provided with a waist-shaped hole, and the lower support (22) is mounted on the sliding block (31) by passing a second fastener through the waist-shaped hole.

9. The lifting height limit alarm device according to claim 1, characterized in that: The laser sensor (1) is arranged below the hoisting drum (4), and the distance between the height of the lens of the laser sensor (1) and the height of the axis of the hoisting drum (4) is 0 cm to 50 cm.

10. The lifting height limit alarm device according to claim 1, characterized in that: The hoist drum (4) is arranged on a mounting frame (5), and the linear motion mechanism (3) is also arranged on the mounting frame (5); and / or, It also includes a prompting device and a controller, wherein the prompting device is electrically connected to the laser sensor (1), and the laser sensor responds to detecting the steel wire rope by sending an electrical signal to the controller, and the controller responds to receiving the electrical signal by controlling the prompting device to send a prompting signal.

11. A lifting device with a lifting height limit alarm device, characterized in that: The lifting device comprises a winch drum (4), a steel wire rope (41) wound around the winch drum (4), and a lifting height limit alarm device according to any one of claims 1 to 10, wherein the lifting height limit alarm device is configured to detect whether the position of the steel wire rope (41) on the winch drum (4) is at a target position.

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