A safety detection device for AGV fork tip

Abstract

A kind of safety detection device for AGV fork tip belongs to handling equipment technical field.The utility model discloses a fork includes first fork and second fork, safety detection device includes photoelectric detection mechanism and anti-collision mechanism, first fork and second fork front end are equipped with anti-collision mechanism, safety detection device still includes image detection mechanism, the front part of the anti-collision mechanism of first fork is equipped with photoelectric detection mechanism, the front part of the anti-collision mechanism of second fork is equipped with image detection mechanism.The utility model can effectively improve the detection range of barrier, to improve security.

Description

Technical Field

[0001] This utility model relates to the field of material handling equipment technology, and in particular to a safety detection device for the fork tips of AGVs. Background Technology

[0002] Currently, AGVs generally have anti-collision mechanisms installed at the front of their forks. For example, Chinese patent document CN221397181U discloses an anti-collision and obstacle avoidance device for the end of the fork arm of a forklift AGV, including a mounting base plate, a telescopic plate, a guide rail slider, a tension spring, a micro switch, and a sensor. One side of the guide rail slider is mounted on the mounting base plate, and the other side is mounted on the telescopic plate. One end of the tension spring is connected to the mounting base plate, and the other end is connected to the telescopic plate. The micro switch is located on the mounting base plate. The sensor includes a direct-type photoelectric sensor, which is connected to the telescopic plate. It uses the direct-type photoelectric sensor to detect obstacles in front and simultaneously uses a contact-type obstacle avoidance mechanism to promptly trigger an emergency stop signal for the AGV, ensuring forklift safety.

[0003] However, the above-mentioned device still has safety issues due to its small detection range, which can lead to missed or false detections. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide a safety detection device for the fork tip of an AGV, which can effectively improve the obstacle detection range and thus improve safety.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A safety detection device for the fork tips of an AGV is disclosed. The fork includes a first fork and a second fork. The safety detection device includes a photoelectric detection mechanism and an anti-collision mechanism. The front ends of both the first and second forks are provided with anti-collision mechanisms. The safety detection device also includes an image detection mechanism. The front part of the anti-collision mechanism of the first fork is provided with a photoelectric detection mechanism, and the front part of the anti-collision mechanism of the second fork is provided with an image detection mechanism.

[0007] Preferably, the anti-collision mechanism includes an anti-collision block, a proximity switch, a switch bracket, and a trigger. The anti-collision block is equipped with the photoelectric detection mechanism or the image detection mechanism. A telescopic component and a reset component are provided between the anti-collision block and the fork. The trigger is located on the inner bottom surface of the fork. The switch bracket connects the anti-collision block and the proximity switch. The proximity switch is located on the side of the trigger facing away from the anti-collision block.

[0008] Preferably, the trigger includes a mounting plate and a trigger plate perpendicular to the mounting plate, and the mounting plate is provided with a strip-shaped mounting hole along the moving direction of the proximity switch.

[0009] Preferably, the switch bracket includes a first connecting plate, a second connecting plate, and a clearance plate. The first connecting plate and the second connecting plate are respectively connected to the proximity switch and the anti-collision block. The clearance plate is connected between the first connecting plate and the second connecting plate and is located above the trigger.

[0010] Preferably, the telescopic assembly includes a guide rod, a guide sleeve, and a support block. The support block is located on the inner bottom surface of the fork, and the guide sleeve is located inside the support block. One end of the guide rod is connected to the anti-collision block, and the other end is slidably connected to the guide sleeve. The end of the guide rod away from the anti-collision block is provided with a limiting plate extending out of the guide sleeve.

[0011] Preferably, the guide sleeve is provided with two circumferential positioning grooves, and a positioning hoop is provided in the circumferential positioning groove, which is connected to the end face of the support block.

[0012] Preferably, the anti-collision block is provided with a mounting groove for the guide rod, one end of the guide rod inserted into the mounting groove is provided with a threaded hole, the bottom of the mounting groove is provided with a mounting hole, and a bolt is connected between the mounting hole and the threaded hole.

[0013] Preferably, the reset assembly includes a spring and an abutment. The abutment has a telescopic hole that cooperates with the guide rod. The abutment is located on the inner bottom surface of the fork, and the spring is sleeved on the guide rod at the part between the abutment and the anti-collision block.

[0014] Preferably, the abutting member comprises two upright plates at an angle to each other.

[0015] The advantages of this utility model are:

[0016] 1. Obstacle detection is achieved by combining photoelectric detection and image detection mechanisms, resulting in more comprehensive detection. Image detection has a wider range and distance, while photoelectric detection reacts faster at close range. The combined use of these two detection methods can effectively improve safety.

[0017] 2. Based on photoelectric detection and image detection, each detection unit is equipped with a set of anti-collision mechanisms, which can not only realize the emergency stop of the AGV, but also prevent damage to the detection unit. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the first fork tip provided in the embodiments of this specification;

[0019] Figure 2 This is a schematic diagram of the structure of the second fork tip provided in the embodiments of this specification;

[0020] Figure 3 This is a schematic diagram of the switch bracket provided in the embodiments of this specification;

[0021] Figure 4This is a schematic diagram of the trigger element provided in the embodiments of this specification;

[0022] Figure 5 This is a schematic diagram of the assembly structure of the support block and guide sleeve provided in the embodiments of this specification;

[0023] Figure 6 This is a schematic diagram of the guide rod provided in the embodiments of this specification;

[0024] Figure 7 This is a schematic diagram of the anti-collision block provided in the embodiments of this specification;

[0025] Figure 8 This is a schematic diagram of the structure of the abutment provided in the embodiments of this specification;

[0026] In the diagram: 1-Photoelectric detection mechanism; 2-Image detection mechanism; 31-Anti-collision block; 311-Mounting groove; 312-Mounting hole; 32-Proximity switch; 33-Switch bracket; 331-First connecting plate; 332-Second connecting plate; 333-Allowing plate; 34-Trigger element; 341-Trigger plate; 342-Mounting plate; 3421-Strip mounting hole; 41-Guide rod; 411-Limiting plate; 412-Threaded hole; 42-Guide sleeve; 421-Positioning clamp; 43-Support block; 51-Spring; 52-Abutting element; 521-Upright plate. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] As mentioned in the background technology, the anti-collision and obstacle avoidance device only uses a direct-type photoelectric sensor to detect obstacles in front. However, the detection distance of the photoelectric sensor is relatively short, and its detection coverage will also decrease when detecting at close range. Therefore, it is easy to have blind spots, resulting in problems such as missed detection and false detection, which poses a safety hazard.

[0029] Therefore, such as Figure 1 and 2As shown, this embodiment provides a safety detection device for the fork tips of an AGV. The forks include a first fork and a second fork. The safety detection device includes a photoelectric detection mechanism 1, an image detection mechanism 2, and an anti-collision mechanism. Anti-collision mechanisms are provided at the front ends of both the first and second forks. The photoelectric detection mechanism 1 is located in front of the anti-collision mechanism of the first fork, and the image detection mechanism 2 is located in front of the anti-collision mechanism of the second fork. The photoelectric detection mechanism 1 can employ, for example, the photoelectric sensor commonly used in existing AGV forks mentioned in the background art. The image detection mechanism 2 can employ existing technology that acquires image information through a camera. Thus, when the AGV is far from the shelf, the image detection mechanism 2 can detect goods or obstacles on the shelf. The camera detection range of the image detection mechanism 2 is a wide-angle range, effectively covering the area in front of both forks. When the AGV moves near the shelf, the photoelectric detection mechanism 1 and the image detection mechanism 2 can be used simultaneously for detection. When the fork accidentally touches an obstacle, the anti-collision mechanism can trigger an emergency stop of the AGV, ensuring safety.

[0030] like Figure 1 As shown, the anti-collision mechanism includes an anti-collision block 31, a proximity switch 32, a switch bracket 33, and a trigger 34. The anti-collision block 31 houses a photoelectric detection mechanism 1 or an image detection mechanism 2. A telescopic assembly and a reset assembly are provided between the anti-collision block 31 and the fork. The trigger 34 is located on the inner bottom surface of the fork. The switch bracket 33 connects the anti-collision block 31 and the proximity switch 32, with the proximity switch 32 positioned on the side of the trigger 34 facing away from the anti-collision block 31. Thus, when the anti-collision block 31 touches an obstacle, it moves towards the fork, causing the proximity switch 32 to move away from the trigger 34. When the proximity switch exceeds its trigger range, it disconnects, and the AGV stops abruptly.

[0031] like Figure 4 As shown, the trigger 34 includes a mounting plate 341 and a trigger plate 342 perpendicular to the mounting plate 341. The mounting plate 342 has a strip-shaped mounting hole 3421 along the moving direction of the proximity switch 32 to facilitate adjustment of the installation position of the trigger, ensuring that the proximity switch can disconnect within a set safe moving distance and guaranteeing safety. In addition, the proximity switch 32 itself is fixed to the switch bracket 33 by two nuts on the left and right sides. Therefore, the distance between the proximity switch 32 and the trigger 34 can also be adjusted by adjusting the position of the two nuts. The combination of these two methods makes the adjustment range larger and more flexible.

[0032] like Figure 3As shown, the switch bracket 33 includes a first connecting plate 331, a second connecting plate 332, and a clearance plate 333. The first connecting plate 331 and the second connecting plate 332 are respectively connected to the proximity switch 32 and the anti-collision block 31. The clearance plate 333 is connected between the first connecting plate 331 and the second connecting plate 332 and is positioned above the trigger member 34. That is, the clearance plate passes over the trigger member from above, so that the anti-collision block can drive the proximity switch away from the trigger member.

[0033] like Figure 1 , 5 As shown in Figure 7, the telescopic assembly includes a guide rod 41, a guide sleeve 42, and a support block 43. The support block 43 is located on the inner bottom surface of the fork, and the guide sleeve 42 is located inside the support block 43. One end of the guide rod 41 is connected to the anti-collision block 31, and the other end is slidably connected to the guide sleeve 42. The end of the guide rod 41 away from the anti-collision block 31 is provided with a limiting plate 411 extending out of the guide sleeve 42 to prevent the guide rod from sliding out of the guide sleeve. The telescopic assembly has two sets to ensure structural stability. To ensure stable installation of the guide sleeve, the guide sleeve 42 is provided with two circumferential positioning grooves, and a positioning clamp 421 is provided in each circumferential positioning groove. The positioning clamp 421 is connected to the end face of the support block 43 by bolts. To ensure stable installation of the guide rod, the anti-collision block 31 is provided with an installation groove 311 adapted to the guide rod 41. The end of the guide rod 41 inserted into the installation groove is provided with a threaded hole 412, and the bottom of the installation groove 311 is provided with an installation hole 312. A bolt connects the installation hole 312 and the threaded hole 412.

[0034] like Figure 1 and 8 As shown, the reset assembly includes a spring 51 and an abutment 52. The abutment 52 has a telescopic hole 522 that engages with the guide rod 41. The abutment 52 is located on the inner bottom surface of the fork, and the spring 51 is sleeved on the guide rod 41 at the portion between the abutment 52 and the anti-collision block 31. Thus, when the anti-collision block moves to one side of the fork, it compresses the spring. When the contact between the anti-collision block and the obstacle is released, the anti-collision block will reset under the action of the spring, thereby resetting the proximity switch and restoring the conductive state. The abutment 52 can be welded to the inner bottom surface of the fork. The abutment 52 includes two mutually perpendicular upright plates 521, which increases the welding range between it and the inner bottom surface of the fork and ensures the vertical state of the abutment, ensuring its stable engagement with the spring.

[0035] The above are merely preferred embodiments of this utility model, and are implementations based on the overall concept of this utility model. Furthermore, the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A safety detection device for the tips of AGV forks, the forks including a first fork and a second fork, the safety detection device including a photoelectric detection mechanism and an anti-collision mechanism, wherein the front ends of both the first fork and the second fork are provided with anti-collision mechanisms, characterized in that, The safety detection device also includes an image detection mechanism. The anti-collision mechanism of the first fork is equipped with a photoelectric detection mechanism at the front, and the anti-collision mechanism of the second fork is equipped with an image detection mechanism at the front.

2. The safety detection device for AGV fork tips according to claim 1, characterized in that, The anti-collision mechanism includes an anti-collision block, a proximity switch, a switch bracket, and a trigger. The anti-collision block is equipped with the photoelectric detection mechanism or the image detection mechanism. A telescopic component and a reset component are provided between the anti-collision block and the fork. The trigger is located on the inner bottom surface of the fork. The switch bracket connects the anti-collision block and the proximity switch. The proximity switch is located on the side of the trigger facing away from the anti-collision block.

3. A safety detection device for AGV fork tips according to claim 2, characterized in that, The trigger includes a mounting plate and a trigger plate perpendicular to the mounting plate. The mounting plate is provided with strip-shaped mounting holes along the moving direction of the proximity switch.

4. A safety detection device for AGV fork tips according to claim 2, characterized in that, The switch bracket includes a first connecting plate, a second connecting plate, and a clearance plate. The first connecting plate and the second connecting plate are respectively connected to the proximity switch and the anti-collision block. The clearance plate is connected between the first connecting plate and the second connecting plate and is located above the trigger.

5. A safety detection device for AGV fork tips according to claim 2, characterized in that, The telescopic assembly includes a guide rod, a guide sleeve, and a support block. The support block is located on the inner bottom surface of the fork, and the guide sleeve is located inside the support block. One end of the guide rod is connected to the anti-collision block, and the other end is slidably connected to the guide sleeve. The end of the guide rod away from the anti-collision block is provided with a limiting plate that extends out of the guide sleeve.

6. A safety detection device for AGV fork tips according to claim 5, characterized in that, The guide sleeve is provided with two circumferential positioning grooves, and a positioning hoop is provided in the circumferential positioning groove. The positioning hoop is connected to the end face of the support block.

7. A safety detection device for AGV fork tips according to claim 5, characterized in that, The anti-collision block is provided with a mounting groove for the guide rod. One end of the guide rod inserted into the mounting groove is provided with a threaded hole. The bottom of the mounting groove is provided with a mounting hole, and a bolt is connected between the mounting hole and the threaded hole.

8. A safety detection device for AGV fork tips according to claim 5, characterized in that, The reset assembly includes a spring and an abutment. The abutment has a telescopic hole that cooperates with the guide rod. The abutment is located on the inner bottom surface of the fork, and the spring is sleeved on the guide rod at the part between the abutment and the anti-collision block.

9. A safety detection device for AGV fork tips according to claim 8, characterized in that, The abutting component comprises two upright plates at an angle to each other.

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