Telescopic height position detection device

Abstract

The utility model discloses a telescopic height position detection device, which comprises a liftable moving platform and a fixed platform, the bottom of the moving platform is fixedly connected with a fixed plate, the fixed plate is provided with a trigger piece capable of moving up and down along the fixed plate, and a spring is connected between the upper end of the trigger piece and the lower end of the fixed plate. An induction piece is mounted on the fixed platform, and when the trigger piece ascends to the maximum height along with the moving platform, the lower end of the trigger piece triggers the induction piece to output a switching signal; when the trigger piece descends to the lowest position along with the moving platform, the lower end of the trigger piece abuts against the fixed platform, the trigger piece moves upwards along the fixed plate, and the spring is compressed. On one hand, the effective length of the triggering piece is increased, so that large-stroke height position detection can be provided, and the device can adapt to the working condition that the ascending stroke of a motion platform is large; and on the other hand, the triggering piece is prevented from being damaged by collision and extrusion, and the working condition that the space below the moving platform is limited after the moving platform descends can be adapted.

Description

Technical Field

[0001] This utility model relates to the field of height position detection technology, specifically a telescopic height position detection device that can provide a large stroke and is applicable to small spaces in AGVs. Background Technology

[0002] During the operation of AGVs, some motion platforms often perform lifting and lowering actions. For example, in forklift AGVs, the forks of the forklifts will lift and lower. When these motion platforms rise to their maximum height, in order to provide a feedback signal to the AGV's control system so that the control system can make logical judgments, this height often needs to be detected.

[0003] Currently, the common detection method is to install a contact detection switch, i.e. a limit switch, on a stationary frame, and install a support that rises and falls with it at the bottom of the moving platform. When the moving platform rises to its maximum height, the support touches the contact of the limit switch, and the limit switch then outputs a switching signal (voltage signal) to the AGV's control system.

[0004] However, the aforementioned detection methods have significant drawbacks. When the platform descends, the space beneath it is limited, while the upward stroke is substantial. Designing and arranging the support becomes problematic. This is because when the platform reaches its lowest point, the support inevitably interferes with the chassis floor, potentially causing damage. If the support is designed to be too short, effective detection is impossible; if it is mounted directly on the platform, extending upwards, it will inevitably interfere with the cargo carried on the platform. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects and deficiencies of the existing technology and provide a telescopic height position detection device. On the one hand, it can increase the effective length of the trigger to provide a large stroke height position detection, which can adapt to the working conditions where the moving platform has a large upward stroke; on the other hand, it can avoid the trigger being damaged by impact and compression, so as to adapt to the working conditions where the space below the moving platform is limited after it descends.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A telescopic height position detection device includes a liftable moving platform and a fixed platform. The device is characterized in that: a fixed plate is fixedly connected to the bottom of the moving platform; a trigger element that can move up and down along the fixed plate is mounted on the fixed plate; a spring connects the upper end of the trigger element to the lower end of the fixed plate; and a sensor element is mounted on the fixed platform. When the trigger element rises to its maximum height with the moving platform, the lower end of the trigger element triggers the sensor element to output a switch signal; when the trigger element descends to its lowest position with the moving platform, the lower end of the trigger element abuts against the fixed platform, the trigger element moves upward along the fixed plate, and the spring is compressed.

[0008] Furthermore, a vertical slide rail is fixedly installed on the fixed plate, and a slider is installed on the vertical slide rail through a sliding fit. A stop bolt is fixedly connected to the lower end of the fixed plate. When the slider moves downward to the bottom of the vertical slide rail, the slider abuts against the stop bolt.

[0009] Furthermore, the upper part of the trigger is fixedly mounted on the slider.

[0010] Furthermore, a hanging lug is integrally connected to one side of the upper end of the trigger, and a limit bolt is fixedly connected to one side of the lower end of the fixing plate. The two ends of the spring are respectively hung on the hanging lug and the limit bolt.

[0011] Furthermore, the sensing element includes a mounting base and a photoelectric switch, wherein the mounting base is fixedly mounted on the fixed platform, and the photoelectric switch is mounted on the mounting base.

[0012] Furthermore, the lower end of the trigger has an inwardly bent U-shaped portion. When the trigger rises to its maximum height with the motion platform, the outer arm of the U-shaped portion blocks the photoelectric switch, triggering the photoelectric switch to output a switch signal. When the trigger descends with the motion platform, the bottom surface of the U-shaped portion abuts against the fixed platform.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The trigger element of this invention can move up and down along the fixed plate, and a spring is connected between the trigger element and the fixed plate. When the motion platform rises to its maximum height, the trigger element can normally trigger the sensor to output a switch signal, increasing the effective length of the trigger element, thereby providing a large stroke height position detection, which can adapt to the working conditions where the motion platform has a large upward stroke. When the motion platform descends to its lowest position, the lower end of the trigger element abuts against the fixed platform. At this time, the trigger element moves upward along the fixed plate, and the spring is compressed, thereby avoiding damage to the trigger element due to impact and compression, and adapting to the working conditions where the space below the motion platform is limited after it descends. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention when the motion platform is raised.

[0016] Figure 2 This is a schematic diagram of the structure of the present invention when the motion platform is descending.

[0017] Figure 3 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] See Figure 1-3 A telescopic height position detection device includes a liftable motion platform 1 and a fixed platform 2. A fixed plate 3 is fixedly connected to the bottom of the motion platform 1. A trigger 4 that can move up and down along the fixed plate 3 is installed on the fixed plate 3. A spring 5 is connected between the upper end of the trigger 4 and the lower end of the fixed plate 3. A sensor 6 is installed on the fixed platform 2. When the trigger 4 rises to the maximum height with the motion platform 1, the lower end of the trigger 4 triggers the sensor 6 to output a switch signal. When the trigger 4 falls to the lowest position with the motion platform 1, the lower end of the trigger 4 abuts against the fixed platform 2, and the trigger 4 moves upward along the fixed plate 3, compressing the spring 5.

[0020] In this utility model, a vertical slide rail 7 is fixedly installed on the fixed plate 3, and a slider 8 is installed on the vertical slide rail 7 through sliding cooperation. A stop bolt 9 is fixedly connected to the lower end of the fixed plate 3.

[0021] Therefore, when the slider 8 moves downward to the bottom of the vertical slide rail 7, the slider 8 abuts against the stop bolt 9 to prevent the slider 8 from disengaging from the vertical slide rail 7.

[0022] It should be noted that by using grooves on both sides of the vertical slide rail 7 to install the slider 8, the trigger 4 can always remain parallel to the sensing element 6 during the up and down movement.

[0023] In this invention, the upper part of the trigger 4 is fixedly installed on the slider 8, thereby enabling the trigger 4 to move up and down along the fixed plate 3.

[0024] In this utility model, a hanging ear 10 is integrally connected to one side of the upper end of the trigger 4, and a limiting bolt 11 is fixedly connected to one side of the lower end of the fixing plate 3. The two ends of the spring 5 are respectively hung on the hanging ear 10 and the limiting bolt 11, so as to connect the spring 5 between the upper end of the trigger 4 and the lower end of the fixing plate 3.

[0025] In this utility model, the sensing element 6 includes a mounting base 61 and a photoelectric switch 62. The mounting base 61 is fixedly mounted on the fixed platform 2, and the photoelectric switch 62 is mounted on the mounting base 61.

[0026] In this invention, the lower end of the trigger 4 has an inwardly bent U-shaped portion 41.

[0027] Therefore, when the trigger 4 rises to its maximum height with the motion platform 1, the outer arm of the U-shaped part 41 blocks the photoelectric switch 62, thereby triggering the photoelectric switch 62 to output a switch signal; when the trigger 4 falls with the motion platform 1, the bottom surface of the U-shaped part 41 abuts against the fixed platform 2.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] When the trigger 4 rises to its maximum height with the motion platform 1, the outer arm of the U-shaped part 41 blocks the photoelectric switch 62, triggering the photoelectric switch 62 to output a switch signal to the AGV's control system, that is, to give the control system a feedback signal so that the control system can make logical judgments.

[0030] This increases the effective length of the trigger 4, enabling it to provide large-stroke height position detection and adapt to working conditions where the motion platform 1 has a large upward stroke.

[0031] At this time, under the action of gravity, the slider 8 is located at the bottom of the vertical slide rail 7 and abuts against the stop bolt 9. Under the blocking of the stop bolt 9 and the pulling force of the spring 5, the slider 8 will not detach from the vertical slide rail 7.

[0032] When the trigger 4 descends to the lowest position with the motion platform 1, the bottom surface of the U-shaped part 41 abuts against the fixed platform 2, and the trigger 4 moves upward along the fixed plate 3, and the spring 5 is compressed until it is compressed to its shortest length.

[0033] This avoids damage to the trigger element 4 due to impact and compression, and can adapt to the limited space below the motion platform 1 after it descends.

[0034] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0035] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A telescopic height position detection device, comprising a liftable moving platform and a fixed platform, characterized in that: A fixed plate is fixedly connected to the bottom of the motion platform. A trigger element that can move up and down along the fixed plate is installed on the fixed plate. A spring is connected between the upper end of the trigger element and the lower end of the fixed plate. A sensor element is installed on the fixed platform. When the trigger element rises to its maximum height with the motion platform, the lower end of the trigger element triggers the sensor element to output a switch signal. When the trigger element falls to its lowest position with the motion platform, the lower end of the trigger element abuts against the fixed platform, the trigger element moves upward along the fixed plate, and the spring is compressed.

2. The telescopic height position detection device according to claim 1, characterized in that: A vertical slide rail is fixedly installed on the fixed plate, and a slider is installed on the vertical slide rail through a sliding fit. A stop bolt is fixedly connected to the lower end of the fixed plate. When the slider moves downward to the bottom of the vertical slide rail, the slider abuts against the stop bolt.

3. The telescopic height position detection device according to claim 2, characterized in that: The upper part of the trigger is fixedly mounted on the slider.

4. The telescopic height position detection device according to claim 2, characterized in that: The upper end of the trigger is integrally connected to a hanging ear, and the lower end of the fixing plate is fixedly connected to a limit bolt. The two ends of the spring are respectively hung on the hanging ear and the limit bolt.

5. The telescopic height position detection device according to claim 1, characterized in that: The sensing element includes a mounting base and a photoelectric switch. The mounting base is fixedly mounted on the fixed platform, and the photoelectric switch is mounted on the mounting base.

6. The telescopic height position detection device according to claim 5, characterized in that: The lower end of the trigger has an inwardly bent U-shaped portion. When the trigger rises to its maximum height with the motion platform, the outer arm of the U-shaped portion blocks the photoelectric switch, triggering the photoelectric switch to output a switch signal. When the trigger descends with the motion platform, the bottom surface of the U-shaped portion abuts against the fixed platform.

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