A collision avoidance device for lifting machinery

Abstract

This utility model belongs to the field of lifting machinery technology, specifically disclosing a lifting machinery anti-collision device, including a base plate, a support plate fixedly installed on the upper end of the base plate, a support rib plate fixedly connected at the angle between the support plate and the base plate, two extension frames fixedly connected to one side of the support plate, a guide groove naturally formed between the two extension frames, a trigger component for buffering is provided on the support plate corresponding to the extension frames, and a mechanical sound-emitting component for warning is provided on one side of the trigger component. By setting up the mechanical sound-emitting component, buffer rod and buffer head, the device adopts the form of touch sound, so there is no need to worry about dust adhesion causing the warning signal to attenuate or be accidentally triggered. Even in dusty and impurity-filled working scenarios such as metal processing, it can still stably realize touch sound warning, and the touch sound dynamically changes with the contact depth of the buffer head. As the buffer head continues to touch and squeeze the obstacle, the sound frequency will gradually increase.

Description

Technical Field

[0001] This utility model belongs to the field of lifting machinery technology, and specifically relates to a collision prevention device for lifting machinery. Background Technology

[0002] In the field of lifting machinery, purely mechanical anti-collision devices are widely used in various types of lifting equipment due to their advantages of not requiring electric drive and strong resistance to harsh environments. Existing purely mechanical anti-collision devices usually have a buffer head to reduce impact damage when the lifting machinery comes into direct contact with obstacles. Some lifting machinery anti-collision solutions integrate sensor early warning modules into the purely mechanical structure. By detecting the distance between the lifting machinery and obstacles in real time, they issue audible and visual warning signals in advance before the device makes physical contact, giving operators more time to slow down or stop, thus improving the level of anti-collision protection.

[0003] However, in factory environments with large amounts of dust and iron powder, suspended dust and iron powder particles can easily adhere to the sensor's detection surface, causing signal attenuation and scattering, affecting the accuracy of distance detection, and potentially leading to delayed or false alarms. This is mainly because the sensor's detection function requires a certain level of environmental cleanliness, and production activities in metal processing plants generate dust and iron powder, making it difficult to completely avoid their impact on the sensor. Consequently, the stability of the sensor's early warning function in such environments is somewhat insufficient. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a collision avoidance device for lifting machinery.

[0005] To achieve the above objectives, this utility model provides a crane anti-collision device, including a base plate, a support plate fixedly installed on the upper end of the base plate, a support rib fixedly connected at the angle between the support plate and the base plate, two extension frames fixedly connected to one side of the support plate, a guide groove naturally formed between the two extension frames, a trigger component for buffering is provided on the support plate corresponding to the extension frames, and a mechanical sound-emitting component for warning is provided on one side of the trigger component.

[0006] In the above technical solution, the triggering component further includes a buffer rod slidably connected between the two extension frames, one end of the buffer rod movably passing through the support plate, two buffer rings sleeved on the outer wall of the buffer rod, and two guide blocks fixedly connected to the inner walls of the two buffer rings.

[0007] In the above technical solution, a return spring is fixedly connected between the buffer ring on the side closer to the extension frame and the support plate, and a buffer head is fixedly connected to the end of the buffer rod away from the support plate. The buffer ring on the side closer to the extension frame is slidably connected to the guide groove through the guide block, and the buffer ring on the side away from the extension frame is fixedly connected to the buffer rod through the guide block.

[0008] In the above technical solution, the mechanical sound-generating component further includes a spring steel sheet, which is movably inserted into the end of the buffer rod away from the buffer head.

[0009] In the above technical solution, the support plate is further provided with symmetrically arranged sliding grooves corresponding to the spring steel sheet, a slider is slidably connected in the sliding groove, and an end cap is fixedly connected to one side of the slider, the lower end of the end cap being concave.

[0010] In the above technical solution, a rectangular plate is fixedly installed on the base plate corresponding to the spring steel sheet. Three sets of limiting teeth are provided at the upper end of the rectangular plate. The three sets of limiting teeth are based on the spring steel sheet, and the tooth spacing of the limiting teeth decreases sequentially from near to far.

[0011] Compared with the prior art, this utility model has the following advantages: by setting up a mechanical sound-generating component, a buffer rod, and a buffer head, it adopts the form of touch-based sound generation. There is no need to worry about dust adhesion causing the warning signal to attenuate or be accidentally triggered. Even in dusty and impurity-filled work scenarios such as metal processing, it can still stably achieve touch-based sound warning. Moreover, the touch-based sound generation dynamically changes with the contact depth of the buffer head. As the buffer head continues to touch and squeeze the obstacle, the sound frequency will gradually increase, and then buffer it. This allows the operator to intuitively judge the collision risk level, which is more accurate than a single warning, allows for more reaction time, and reduces collision accidents caused by operational errors. Attached Figure Description

[0012] Figure 1 This is the main view of the structure proposed in this utility model; Figure 2 This is a side view of the structure proposed in this utility model; Figure 3 This is a schematic diagram of the spring steel sheet structure proposed in this utility model; Figure 4 This is a partial structural cross-sectional view of the present invention.

[0013] In the diagram: 1. Base plate, 2. Support plate, 3. Support rib, 4. Extension frame, 5. Guide groove, 6. Buffer rod, 7. Buffer ring, 8. Guide block, 9. Return spring, 10. Buffer head, 11. Spring steel sheet, 12. Slide groove, 13. Slider, 14. End cap, 15. Rectangular plate, 16. Limiting tooth. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] like Figures 1-4 The crane anti-collision device shown includes a base plate 1, a support plate 2 fixedly installed on the upper end of the base plate 1, and a support rib 3 fixedly connected at the angle between the support plate 2 and the base plate 1. The device is characterized in that two extension frames 4 are fixedly connected to one side of the support plate 2, and a guide groove 5 is naturally formed between the two extension frames 4. The support plate 2 is provided with a trigger component for buffering corresponding to the extension frames 4, and a mechanical sound-emitting component for warning is provided on one side of the trigger component. The triggering component includes a buffer rod 6 slidably connected between two extension frames 4. One end of the buffer rod 6 movably passes through the support plate 2. Two buffer rings 7 are sleeved on the outer wall of the buffer rod 6. Two guide blocks 8 are fixedly connected to the inner wall of each of the two buffer rings 7. A return spring 9 is fixedly connected between the buffer ring 7 on the side closer to the extension frame 4 and the support plate 2. A buffer head 10 is fixedly connected to the end of the buffer rod 6 away from the support plate 2. The buffer ring 7 on the side closer to the extension frame 4 is slidably connected to the guide groove 5 through the guide block 8. The buffer ring 7 on the side away from the extension frame 4 is fixedly connected to the buffer rod 6 through the guide block 8. The mechanical sound-generating component includes a spring steel sheet 11, which is movably inserted into the end of the buffer rod 6 away from the buffer head 10. The support plate 2 has symmetrically arranged sliding grooves 12 corresponding to the spring steel sheet 11. A slider 13 is slidably connected in the sliding groove 12. An end cap 14 is fixedly connected to one side of the slider 13. The lower end of the end cap 14 is concave. A rectangular plate 15 is fixedly installed on the base plate 1 corresponding to the spring steel sheet 11. Three sets of limiting teeth 16 are provided on the upper end of the rectangular plate 15. The three sets of limiting teeth 16 are based on the spring steel sheet 11, and the tooth pitch of the limiting teeth 16 decreases sequentially from near to far.

[0016] Working principle: First, the base plate 1 is fixedly installed on the crossbeam of the crane frame. When the crane moves close to the obstacle, the obstacle first contacts the buffer head 10 and applies a pushing force to the buffer head 10 in the direction of the support plate 2. The buffer head 10 under force drives the buffer rod 6 fixedly connected to it to move synchronously. The buffer rod 6 slides along the gap between the two extension frames 4. At this time, the end of the buffer rod 6 away from the buffer head 10 extends outward to the outside of the support plate 2, preparing for the subsequent movement of the mechanical sound-generating component.

[0017] During the movement of the buffer rod 6, it drives the "buffer ring 7 on the side away from the extension frame 4" which is fixedly connected to it through the guide block 8 to move synchronously. The buffer ring 7 applies a pushing force to the "buffer ring 7 on the side closer to the extension frame 4". The buffer ring 7 on the side closer to the extension frame 4 slides in the guide groove 5 naturally formed between the two extension frames 4 through the guide block 8 on its inner wall. As the two buffer rings 7 approach each other, the buffer ring 7 on the side closer to the extension frame 4 presses the return spring 9 towards the support plate 2. The return spring 9 is compressed and generates elastic potential energy. By absorbing the impact force when the crane collides with itself through its own deformation, it avoids the crane frame from deforming or the load from shaking violently due to hard contact, and plays the role of core buffer energy absorption.

[0018] As the buffer rod 6 continues to move toward the support plate 2, the end of it away from the buffer head 10 drives the movable spring steel sheet 11 to move synchronously. During the movement, the lower end of the spring steel sheet 11 is in continuous contact with the three sets of limiting teeth 16 at the upper end of the rectangular plate 15. Since the three sets of limiting teeth 16 are based on the spring steel sheet 11 and the "tooth pitch decreases from near to far", the contact frequency between the spring steel sheet 11 and the limiting teeth 16 changes with the moving distance, thus achieving graded warning: when the spring steel sheet 11 is outside the rectangular plate 15, it contacts the limiting tooth 16 with the widest gap. The frequency of the spring steel sheet 11 being flicked by the limiting tooth 16 is low, producing a slow warning sound, indicating to the operator that they have entered the safety warning range and need to reduce the operating speed. If the operator does not slow down, the buffer rod 6 continues to push the spring steel plate 11 toward the center of the rectangular plate 15. The spring steel plate 11 contacts the limit tooth 16 with a medium gap, the frequency of being tugged increases, the warning sound changes to a medium frequency sound, and it forcibly reminds that the distance to the obstacle is close and the stop must be made immediately. If the vehicle still does not stop, the spring steel sheet 11 moves with the buffer rod 6 to the inside of the rectangular plate 15 and contacts the limit tooth 16 with the closest gap. The frequency of being tugged reaches its maximum, emitting a high-frequency rapid sound to inform the operator that a collision is imminent and emergency handling is required. The three-level warning is achieved through a purely mechanical structure, which can transmit the risk level without the need for electronic components.

[0019] During the movement of the spring steel sheet 11, it can move through the concave area at the lower end of the end cover 14 to avoid motion interference. At the same time, the end cover 14 covers the upper part of the spring steel sheet 11 to prevent dust and oil from adhering to the surface of the spring steel sheet 11 and affecting the vibration and sound generation effect.

[0020] When the lifting machinery reverses and moves away from the obstacle, the thrust on the buffer head 10 disappears, and the return spring 9 releases the stored elastic potential energy, applying a reverse thrust to the buffer ring 7 on the side closer to the extension frame 4. The buffer ring 7 slides in the reverse direction in the guide groove 5 through the guide block 8, pushing the buffer ring 7 on the side away from the extension frame 4 to move, thereby driving the buffer rod 6 and the buffer head 10 to return to the initial extended position. At the same time, the buffer rod 6 drives the spring steel plate 11 to move in the reverse direction, returning to the standby position outside the rectangular plate 15. The return spring 9 returns to its natural extended state, the device completes the reset, and waits for the next trigger to achieve cyclic use.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A collision avoidance device for lifting machinery, comprising a base plate (1), wherein a support plate (2) is fixedly installed on the upper end of the base plate (1), and a support rib plate (3) is fixedly connected at the angle between the support plate (2) and the base plate (1), characterized in that, Two extension frames (4) are fixedly connected to one side of the support plate (2), and a guide groove (5) is naturally formed between the two extension frames (4). The support plate (2) is provided with a trigger component for buffering corresponding to the extension frame (4), and a mechanical sound-generating component for warning is provided on one side of the trigger component.

2. A crane anti-collision device according to claim 1, characterized in that The triggering component includes a buffer rod (6) that is slidably connected between the two extension frames (4). One end of the buffer rod (6) extends through the support plate (2). Two buffer rings (7) are sleeved on the outer wall of the buffer rod (6). Two guide blocks (8) are fixedly connected to the inner walls of the two buffer rings (7).

3. A crane anti-collision device according to claim 2, characterised in that, A return spring (9) is fixedly connected between the buffer ring (7) on the side closer to the extension frame (4) and the support plate (2). A buffer head (10) is fixedly connected to the end of the buffer rod (6) away from the support plate (2). The buffer ring (7) on the side closer to the extension frame (4) is slidably connected to the guide groove (5) through the guide block (8). The buffer ring (7) on the side away from the extension frame (4) is fixedly connected to the buffer rod (6) through the guide block (8).

4. A crane anti-collision device according to claim 2, characterised in that, The mechanical sound-generating component includes a spring steel sheet (11), which is movably inserted into the end of the buffer rod (6) away from the buffer head (10).

5. A crane anti-collision device according to claim 4, characterised in that, The support plate (2) has symmetrically arranged sliding grooves (12) corresponding to the spring steel sheet (11). A slider (13) is slidably connected in the sliding groove (12). An end cap (14) is fixedly connected to one side of the slider (13). The lower end of the end cap (14) is concave.

6. A crane anti-collision device according to claim 4, characterized in that, The base plate (1) is fixedly installed with a rectangular plate (15) corresponding to the spring steel sheet (11). The upper end of the rectangular plate (15) is provided with three sets of limiting teeth (16). The three sets of limiting teeth (16) are based on the spring steel sheet (11), and the tooth pitch of the limiting teeth (16) decreases from near to far.

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