elevator

Abstract

The application relates to a lifting machine, which comprises a lifting mechanism, a trigger plate, a limit switch and a traction member, the lifting mechanism can stop moving in response to a trigger signal; the trigger plate is arranged on the lower side of the lifting mechanism; the limit switch is located between the lifting mechanism and the trigger plate and is connected to the lifting mechanism, and a gap is formed between the trigger head of the limit switch and the trigger plate; the trigger plate is connected to the lifting mechanism through the traction member, and the trigger plate can move upwards under the action of external force to contact the trigger head, so that the limit switch sends the trigger signal. When a person or an object appears below the lifting machine, the trigger plate will first contact the obstacle, the trigger plate is lifted, and then the limit switch installed on the lifting mechanism is triggered, the limit switch sends a signal immediately after being triggered, and then the lifting machine is rapidly controlled to stop running.

Description

Technical Field

[0001] This application relates to the field of solar cell manufacturing technology, and in particular to a hoisting machine. Background Technology

[0002] In the photovoltaic cell production process, many machines require hoisting devices. These hoists are responsible for transporting the cells through baskets and precisely inserting them into the baskets. With the rapid development of the photovoltaic industry, the automation level of photovoltaic cell equipment continues to increase, placing higher demands on the safety and stability of equipment operation. As a crucial component of the photovoltaic cell production line, the safety performance of the hoist is of paramount importance.

[0003] In practical applications, a lower limit sensor is typically used as the anti-pressure structure for the hoist. The hoist will only trigger an over-limit alarm and stop descending when it descends to the position set by the lower limit sensor.

[0004] Current anti-pinch structures based primarily on limit sensors have certain shortcomings: when someone is performing maintenance work below the hoist, if the maintenance worker's height is higher than the detection height of the lower limit sensor, the hoist will not be able to detect the person below in time during the downward movement and will continue to press down on the maintenance worker until a servo overload alarm is triggered or the emergency stop button is pressed by the worker. During this process, there is a high possibility of serious injury to the maintenance worker, posing a threat to their personal safety. Utility Model Content

[0005] Therefore, it is necessary to provide a hoist that addresses the problem of not being able to detect personnel in a timely manner when they are below the hoist.

[0006] A hoist, the hoist comprising:

[0007] The lifting mechanism can stop moving in response to a trigger signal;

[0008] A trigger plate is located on the lower side of the lifting mechanism;

[0009] A limit switch is located between the lifting mechanism and the trigger plate, and is connected to the lifting mechanism; a gap exists between the trigger head of the limit switch and the trigger plate; and...

[0010] The traction component connects the trigger plate to the lifting mechanism. The trigger plate can move upward under the action of external force to contact the trigger head, thereby triggering the limit switch to send the trigger signal.

[0011] In one embodiment, the traction element includes a chain.

[0012] In one embodiment, there are multiple chains, which are arranged at intervals around the direction of movement of the lifting mechanism.

[0013] In one embodiment, multiple sets of chains of the same length are used as a chain group, and multiple sets of chains of different lengths are provided.

[0014] In one embodiment, the limit switch is provided in multiple manner.

[0015] In one embodiment, the system further includes a slide rail and a slider, one of which is mounted on the lifting mechanism and the other is mounted on the mounting platform. The length direction of the slide rail is parallel to the movement direction of the lifting mechanism.

[0016] In one embodiment, the slide rail is disposed on the mounting platform;

[0017] It also includes a first sensor and a first sensing plate, the first sensor being disposed on the slide rail and the first sensing plate being disposed on the lifting mechanism.

[0018] In one embodiment, a second sensor is also included, which is disposed on the slide rail, and the first sensor and the second sensor are arranged at intervals along the direction of movement.

[0019] In one embodiment, a drive source is also included, the output of which is connected to the lifting mechanism.

[0020] In one embodiment, a controller is further included, which is communicatively connected to the limit switch and the drive source. The controller is used to receive electrical signals from the limit switch and control the drive source to stop moving.

[0021] The aforementioned hoist connects the hoisting mechanism and the trigger plate by setting a traction component. A limit switch is set between the trigger plate and the hoisting mechanism, and there is a gap between the trigger head of the limit switch and the trigger plate. When the hoisting mechanism drives the trigger plate to move, once the trigger plate approaches the trigger head of the limit switch and meets the triggering condition, the limit switch can respond quickly, thus creating a more sensitive triggering mechanism.

[0022] When a person or object appears below the hoist, the trigger plate will first come into contact with the obstacle, and the trigger plate will be lifted up, which will then trigger the limit switch installed on the hoisting mechanism. After the limit switch is triggered, it will immediately send a signal, which will then quickly control the hoist to stop running, thereby avoiding injury to the person or object below.

[0023] Compared to existing hoist anti-pinch structures that use lower limit sensors, this application can control the hoist to stop moving more promptly, reducing the risk of accidents. Furthermore, the trigger plate and limit switch are not limited by a specific height, overcoming the limitations of traditional lower limit sensors. Regardless of the height of maintenance personnel below the hoist, as long as the trigger plate approaches the limit switch during its movement, the limit switch will be triggered. This effectively avoids the detection blind spot problem caused by personnel being higher than the lower limit sensor's sensing height, comprehensively ensuring the safety of personnel working below the hoist.

[0024] In addition, this application integrates the limit switch and trigger plate into the lifting mechanism, which reduces the complex layout of the sensing system, lowers the equipment failure rate, and improves the reliability of the anti-pressure system, ensuring the stable operation of the photovoltaic cell production line while ensuring personnel safety. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the hoist provided in an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the structure of the lifting mechanism provided in the embodiment of this application, which has a trigger plate and a limit switch below it.

[0027] Figure label:

[0028] 100. Upgrade the organization;

[0029] 200. Trigger plate;

[0030] 300. Limit switch; 310. Trigger head;

[0031] 400. Chain;

[0032] 500, slide rail. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying 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. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] This application provides a hoist, such as Figure 1 and Figure 2 As shown, the hoist includes: a hoisting mechanism 100, a trigger plate 200, a limit switch 300, and a traction member. The hoisting mechanism 100 can stop moving in response to a trigger signal. The trigger plate 200 is located below the hoisting mechanism 100. The limit switch 300 is located between the hoisting mechanism 100 and the trigger plate 200 and is connected to the hoisting mechanism 100. There is a gap between the trigger head 310 of the limit switch 300 and the trigger plate 200. The trigger plate 200 is connected to the hoisting mechanism 100 through the traction member. The trigger plate 200 can move upward under the action of an external force to contact the trigger head 310, thereby triggering the limit switch 300 to send a trigger signal.

[0040] The aforementioned hoist connects the hoisting mechanism 100 and the trigger plate 200 via a traction component. A limit switch 300 is installed between the trigger plate 200 and the hoisting mechanism 100, with a gap between the trigger head 310 of the limit switch 300 and the trigger plate 200. When the hoisting mechanism 100 drives the trigger plate 200 to move, the limit switch 300 can respond quickly once the trigger plate 200 approaches the trigger head 310 of the limit switch 300 and meets the triggering conditions, thus creating a more sensitive triggering mechanism.

[0041] When a person or object appears below the hoist, the trigger plate 200 will first come into contact with the obstacle, and the trigger plate 200 will be lifted up, thereby triggering the limit switch 300 installed on the hoisting mechanism 100. After the limit switch 300 is triggered, it will immediately send a signal, thereby quickly controlling the hoist to stop running, thus avoiding injury to the person or object below.

[0042] Compared to existing hoist anti-pressure structures that use lower limit sensors, this application can control the hoist to stop moving more promptly, reducing the risk of accidents. Furthermore, the trigger plate 200 and limit switch 300 are not limited by a specific height, overcoming the limitations of traditional lower limit sensors. Regardless of the height of maintenance personnel below the hoist, as long as the trigger plate 200 approaches the limit switch 300 during its movement, the limit switch 300 will be triggered. This effectively avoids the detection blind spot problem caused by personnel being higher than the lower limit sensor's sensing height, comprehensively ensuring the safety of personnel working below the hoist.

[0043] In addition, this application integrates the limit switch 300 and the trigger plate 200 into the lifting mechanism 100, which reduces the complex arrangement of the sensing system, lowers the equipment failure rate, and improves the reliability of the anti-pressure system, ensuring the stable operation of the photovoltaic cell production line under the premise of ensuring personnel safety.

[0044] In this embodiment, as Figure 1 and Figure 2 As shown, the trigger plate 200 and the limit switch 300 are located below the lifting mechanism 100 and connected to the bottom surface of the lifting mechanism 100.

[0045] In one embodiment, the hoist also includes a drive source, the output of which is connected to the hoisting mechanism 100. As the power core of the hoist, the drive source, connected to the hoisting mechanism 100, converts its own energy into the kinetic energy of the hoisting mechanism 100, driving it to perform lifting and other movements. This enables the hoist to complete tasks such as material conveying and equipment lifting, and is fundamental to its normal operation. The drive source allows for precise control of the hoisting mechanism 100's motion parameters, such as speed and stroke. For example, by adjusting the output power and speed of the drive source according to different usage scenarios and requirements, the lifting speed of the hoisting mechanism 100 can be adjusted to adapt to different work rhythms and load requirements, thereby improving the hoist's efficiency and adaptability.

[0046] In one embodiment, the hoist also includes a controller, which is communicatively connected to the limit switch 300 and the drive source. The controller receives electrical signals from the limit switch 300 and controls the drive source to stop moving. By configuring the controller and communicating it with the limit switch 300, the controller can receive trigger electrical signals sent by the limit switch 300 in real time and issue a stop command to the drive source in a very short time, thus preventing mechanical collisions, component damage, or safety accidents caused by the hoisting mechanism 100 operating beyond its travel range.

[0047] In one embodiment, such as Figure 1 and Figure 2As shown, the traction component includes a traction rope, and the trigger plate 200 is connected to the lifting mechanism 100 via the traction rope.

[0048] In one embodiment, such as Figure 1 and Figure 2 As shown, the traction component includes a chain 400, and the trigger plate 200 is connected to the lifting mechanism 100 via the chain 400. By setting the chain 400 to connect the lifting mechanism 100 and the trigger plate 200, the chain 400 structure allows the trigger plate 200 and the lifting mechanism 100 to maintain a relatively flexible connection during movement. Compared with a rigid connection, this effectively avoids connection failure or stress concentration problems of the trigger plate 200 caused by slight offsets, vibrations, or angle changes of the lifting mechanism 100, ensuring that the trigger plate 200 always moves stably and synchronously with the lifting mechanism 100, thus improving the reliability and stability of the entire hoist operation. Moreover, the chain 400 itself has a certain elastic deformation capacity, which can buffer the impact force when the lifting mechanism 100 moves at high speed or suddenly starts or stops, reducing the instantaneous impact on the trigger plate 200 and the limit switch 300, preventing the trigger head 310 from being accidentally triggered or the mechanical structure from being damaged due to severe vibration, extending the service life of key components such as the limit switch 300 and the trigger plate 200, and reducing equipment maintenance costs.

[0049] In addition, the flexible connection characteristics of the chain 400 give the lifting mechanism 100 and the trigger plate 200 greater freedom of movement, which can adapt to complex motion trajectories and spatial layout requirements, providing possibilities for the functional expansion of the hoist in different application scenarios, and enabling the equipment to meet diverse industrial production needs.

[0050] In one embodiment, such as Figure 1 and Figure 2 As shown, multiple chains 400 are provided, and these chains 400 are arranged at intervals around the direction of movement of the lifting mechanism 100. The multiple chains 400 disperse the connection load between the lifting mechanism 100 and the trigger plate 200, preventing the risk of breakage of a single chain 400 due to excessive stress. This significantly improves the overall strength and load-bearing capacity of the connection structure, effectively ensuring the safety of the hoist under long-term, high-frequency operation. Furthermore, the spaced distribution of multiple chains 400 forms a stable connection array, which significantly enhances the stability of the connection between the trigger plate 200 and the lifting mechanism 100, reducing loosening of the connection or offset of the trigger plate 200 caused by vibration and swaying during movement. This ensures that the trigger plate 200 can accurately trigger the limit switch 300, thereby improving the accuracy and reliability of the hoist's limit control.

[0051] In addition, the multi-chain 400 design also has a redundancy protection function. When a certain chain 400 is worn or damaged, the other chains 400 can still maintain an effective connection between the trigger plate 200 and the lifting mechanism 100, ensuring that the hoist will not stop due to the failure of a single chain 400. This improves the continuity of equipment operation and the convenience of maintenance, and reduces the overall maintenance cost and downtime loss.

[0052] In one embodiment, multiple sets of chains 400 of the same length are used as a chain group, while multiple sets of chains of different lengths are also provided. Different usage scenarios and working requirements may require the hoist to have different strokes or trigger positions. Multiple sets of chains of different lengths enable the hoist to adapt to diverse working environments and application needs. By setting multiple sets of chains of different lengths, the relative positional relationship between the trigger plate 200 and the trigger head 310 of the limit switch 300 can be adjusted more flexibly. During the commissioning and operation of the hoist, chain groups of appropriate lengths can be selected and combined according to actual needs, thereby precisely controlling the timing of the trigger plate 200 triggering the limit switch 300, achieving precise control of the stroke of the hoisting mechanism 100, and meeting the high-precision operation requirements under different working conditions.

[0053] In one embodiment, such as Figure 1 and Figure 2 As shown, multiple limit switches 300 are provided. The multiple limit switches 300 form a redundant protection mechanism. When one limit switch 300 fails due to mechanical failure, electrical abnormality, or external interference, the other limit switches 300 can still function normally, triggering the limit action in a timely manner to prevent the lifting mechanism 100 from exceeding the safe travel range. This avoids equipment damage, material falling, or even safety accidents caused by the lack of limit function, significantly improving the safety and reliability of the hoist operation. Furthermore, the multiple limit switches 300 can achieve fault monitoring through mutual verification. When abnormal differences occur in the triggering states of different limit switches 300, the controller can quickly identify potential limit switch 300 faults and issue timely warning signals. This facilitates maintenance personnel in quickly locating the fault point and carrying out targeted repairs, reducing equipment downtime and improving equipment maintainability and operating efficiency.

[0054] In addition, different limit switches 300 can correspond to different key positions of the lifting mechanism 100, such as the extreme position, the intermediate position, and the deceleration position, so as to achieve segmented and precise control of the stroke of the lifting mechanism 100.

[0055] In this embodiment, two limit switches 300 are provided. In other embodiments, the number of limit switches 300 is set according to actual operational needs.

[0056] It should be noted that multiple limit switches 300 are set, and the positions of the multiple limit switches 300 on the lifting mechanism 100 are adjusted according to actual operational needs.

[0057] In one embodiment, the hoist also includes a slide rail 500 and a slider. One slider is mounted on the lifting mechanism 100, and the other is mounted on the mounting platform. The length direction of the slide rail 500 is parallel to the movement direction of the lifting mechanism 100. By aligning the length direction of the slide rail 500 with the movement direction of the lifting mechanism 100, the cooperation between the slider and the slide rail 500 forms a rigid guiding structure, forcing the lifting mechanism 100 to move along a preset straight trajectory. This prevents deviation, swaying, or rotation caused by uneven force or external interference, ensuring the hoist maintains high movement accuracy during lifting or translation. Furthermore, the contact surface between the slider and the slide rail 500 can withstand the weight of the lifting mechanism 100 and the dynamic load during operation. By increasing the contact area, stress is dispersed, reducing the risk of deformation caused by single-point force on the lifting mechanism 100. The cooperation between the slide rail 500 and the slider forms a "track-guide" constraint system, which can suppress the tilting or overturning of the lifting mechanism 100 in a plane perpendicular to the movement direction, improving the overall structure's anti-overturning stability.

[0058] In one embodiment, the slide rail 500 is mounted on the installation platform; the hoist also includes a first sensor and a first sensing plate, the first sensor being mounted on the slide rail 500 and the first sensing plate being mounted on the hoisting mechanism 100. Through the cooperation of the first sensor and the first sensing plate, the specific position of the hoisting mechanism 100 on the slide rail 500 can be detected in real time via sensing signals (such as photoelectric or electromagnetic induction). Compared to traditional mechanical limiting methods, non-contact sensing avoids positioning errors caused by mechanical wear, improves the accuracy and reliability of position detection, and ensures more precise position control of the hoisting mechanism 100 during hoist operation. Furthermore, through real-time position feedback, early warnings or adjustments to the operating speed can be made when the hoisting mechanism 100 approaches a preset limit position (such as before the limit switch 300 is triggered), preventing equipment damage or safety accidents caused by inertia exceeding the limit, forming a dual protection mechanism of "sensor pre-alarm + limit switch 300 hard limit". If the lifting mechanism 100 experiences abnormal displacement (such as jamming or slippage), the sensor can immediately trigger a shutdown when it detects an abnormal position signal, thus preventing the fault from escalating and enhancing the safety of equipment operation.

[0059] In one embodiment, the hoist further includes a second sensor mounted on the slide rail 500, with the first and second sensors arranged at intervals along the direction of movement. By adding a second sensor to the slide rail 500, and with the first and second sensors spaced apart along the direction of movement, they can correspond to different position nodes (such as the upper limit position, lower limit position, or intermediate safety monitoring point) during the hoist's movement stroke. When the hoisting mechanism 100 moves the first sensing plate, the first and second sensors are triggered sequentially, or only specific sensors are triggered, thereby determining whether the mechanism has reached the preset position through dual sensing signals. This avoids misjudgment of position or over-limit operation due to a single sensor malfunction, reducing safety risks such as equipment impact and overload.

[0060] In practical applications, the first and second sensors can divide the stroke of the lifting mechanism 100 into multiple controllable ranges, for example:

[0061] Low-speed operating range: Located between the first and second sensors, the mechanism operates at a lower speed within this range, which facilitates precise positioning;

[0062] High-speed operating zone: Located outside the first and second sensors, the mechanism can move quickly within this zone to improve efficiency.

[0063] By dividing the machine into intervals, the operating logic of the hoist can be optimized, balancing efficiency and safety.

[0064] The first and second sensors can be associated with different control commands, for example:

[0065] When the first sensor triggers the first sensor, the lifting mechanism 100 switches from high-speed operation to low-speed operation;

[0066] When the second sensor is triggered, the mechanism stops moving or reverses direction.

[0067] This tiered control mode can prevent the mechanism from being impacted by a direct emergency stop.

[0068] In addition, dual sensors can form a redundant monitoring system: when one sensor fails (such as signal failure or false triggering), the other sensor can still work independently to maintain the basic operating functions of the equipment. At the same time, the system will alarm to indicate the fault, which will help maintenance personnel to quickly locate and replace the damaged parts and reduce downtime.

[0069] In this embodiment, the first sensor and the second sensor are photoelectric sensors.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A hoist, characterized in that, The hoist includes: The lifting mechanism (100) is able to stop moving in response to a trigger signal; A trigger plate (200) is located on the lower side of the lifting mechanism (100); A limit switch (300) is located between the lifting mechanism (100) and the trigger plate (200), and is connected to the lifting mechanism (100). A gap exists between the trigger head (310) of the limit switch (300) and the trigger plate (200). The traction member, the trigger plate (200) is connected to the lifting mechanism (100) through the traction member, the trigger plate (200) can move upward under the action of external force to contact the trigger head (310) to trigger the limit switch (300) to send the trigger signal.

2. The hoist according to claim 1, characterized in that, The traction component includes a chain (400).

3. The hoist according to claim 2, characterized in that, The chain (400) is provided in multiple ways, and the multiple chains (400) are arranged at intervals around the movement direction of the lifting mechanism (100).

4. The hoist according to claim 3, characterized in that, A chain group is formed by multiple chains of the same length (400), and multiple chain groups of different lengths are provided.

5. The hoist according to claim 1, characterized in that, The limit switch (300) is provided in multiple units.

6. The hoist according to claim 1, characterized in that, It also includes a slide rail (500) and a slider, one of which is disposed on the lifting mechanism (100) and the other is disposed on the mounting platform. The length direction of the slide rail (500) is parallel to the movement direction of the lifting mechanism (100).

7. The hoist according to claim 6, characterized in that, The slide rail (500) is mounted on the mounting platform; It also includes a first sensor and a first sensing plate, the first sensor being disposed on the slide rail (500) and the first sensing plate being disposed on the lifting mechanism (100).

8. The hoist according to claim 7, characterized in that, It also includes a second sensor, which is disposed on the slide rail (500), and the first sensor and the second sensor are arranged at intervals along the direction of movement.

9. The hoist according to claim 1, characterized in that, It also includes a drive source, the output of which is connected to the lifting mechanism (100).

10. The hoist according to claim 9, characterized in that, It also includes a controller, which is communicatively connected to the limit switch (300) and the drive source. The controller is used to receive the electrical signal from the limit switch (300) and control the drive source to stop moving.

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