Top rushing prevention limiter

Abstract

The utility model discloses an anti-collision stopper which comprises a U-shaped fixed back plate, a U-shaped mounting plate, a guide rod and a first spring. A U-shaped mounting plate matched with a U-shaped fixing back plate is movably arranged on the inner side of the U-shaped fixing back plate, a plurality of guide rods are fixedly connected to the inner side of the U-shaped fixing back plate, the guide rods penetrate through the U-shaped mounting plate in a sliding mode, round holes allowing the guide rods to penetrate through and slide are formed in the U-shaped mounting plate, and the outer side of each guide rod is sleeved with a first spring; the first spring is arranged between the top face of the U-shaped installation plate and the inner side of the top of the U-shaped fixing back plate, and elastic buffering is formed between the U-shaped installation plate and the U-shaped fixing back plate through the first spring. And when the delayed stop phenomenon occurs, the U-shaped mounting plate can compress the first spring to form buffering, and damage to parts caused by rigid extrusion is avoided.

Description

Technical Field

[0001] This utility model relates to the field of anti-collision technology, specifically an anti-collision limiter. Background Technology

[0002] To ensure the safe and long-term use of cranes and prevent electric hoists from overshooting, anti-overshoot limit switches are essential protective devices for electric hoists, effectively guaranteeing their long-term safe operation.

[0003] A search revealed a patent document with publication number CN208327224U, which discloses an anti-overrun limiter for an electric hoist, including a mounting plate, which is fixed to the static rope by a static rope clamping device.

[0004] In the aforementioned prior art, the limit switch is fixedly installed on the static rope of the electric hoist. When contact with the anti-collision limit switch occurs, there is a problem of stopping delay causing impact, which causes the limit switch part of the structure to be deformed by the impact. Therefore, a new anti-collision limit switch is proposed to optimize the aforementioned prior art. Utility Model Content

[0005] The purpose of this invention is to provide an anti-collision limiter to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An anti-collision limiter includes a U-shaped fixed back plate. A U-shaped mounting plate is movably disposed on the inner side of the U-shaped fixed back plate. Multiple guide rods are fixedly connected to the inner side of the U-shaped fixed back plate, and the guide rods slide through the U-shaped mounting plate. A circular hole is provided on the U-shaped mounting plate for the guide rods to pass through and slide. A first spring is sleeved on the outer side of each guide rod, and the first spring is located between the top surface of the U-shaped mounting plate and the top inner side of the U-shaped fixed back plate. A fixing mechanism for connecting to a static rope is symmetrically provided on the back of the U-shaped fixed back plate. A clamping plate is provided on the outer side of the U-shaped mounting plate, and a limit switch is clamped between the clamping plate and the U-shaped mounting plate. A corresponding trigger frame is provided below the limit switch, and the top of the trigger frame is hinged to the bottom of the U-shaped mounting plate. The trigger frame and the clamping plate are suspended by a connecting strap, with both ends of the connecting strap respectively attached to the connectors on the trigger frame and the clamping plate.

[0008] As a further embodiment of this utility model: the clamping plate and the U-shaped mounting plate are fixedly connected to the opposite sides of the positioning frame adapted to the limit switch. The clamping plate and the U-shaped mounting plate are fixedly installed by fixing bolts. The fixing bolts pass through the clamping plate and the U-shaped mounting plate and are threaded with nuts. The four corners of the clamping plate and the U-shaped mounting plate are provided with round holes for the fixing bolts to pass through and move.

[0009] As a further embodiment of this utility model: the fixing mechanism includes a hook seat, which is fixedly connected to a U-shaped fixing back plate. A fixing wedge is fixedly connected to the inner side of the hook seat corresponding to the U-shaped fixing back plate. A movable wedge is provided on the fixed wedge, which is adapted to it. A clamping cavity is provided between the movable wedge and the hook seat. The clamping cavity is used to clamp and fix the static rope.

[0010] As a further improvement of this utility model, the inner wall of the clamping cavity corresponding to the movable wedge block and the hook seat is fixedly connected with an anti-slip pad.

[0011] As a further embodiment of this utility model: the inclined edge of the fixed wedge is fixedly connected with a stop, the stop is blocked on the side wall of the movable wedge, the stop limits the movable wedge to the fixed wedge, and at the same time the movable wedge is partially inserted into the hook of the hook seat, thereby preventing the movable wedge from falling off.

[0012] As a further embodiment of this utility model: an extension plate is fixedly connected above the hook seat corresponding to the fixed wedge block, a clamping bolt is threadedly connected to the extension plate, and a threaded hole for threaded connection of the clamping bolt is opened on the extension plate. The clamping bolt abuts against the top surface of the movable wedge block, and a second spring is sleeved on the outside of the clamping bolt. The second spring is arranged between the extension plate and the movable wedge block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses a first spring to form an elastic buffer between the U-shaped mounting plate and the U-shaped fixed back plate. When the limit switch, which is clamped and fixed between the clamping plate and the U-shaped mounting plate, is triggered, the U-shaped mounting plate can compress the first spring to form a buffer when a delayed stop occurs, thus avoiding rigid compression that could damage the components.

[0015] 2. The clamping plate and the U-shaped mounting plate of this utility model are assembled by fixing bolts, and the limit switch is positioned by the positioning frame, which facilitates the installation and disassembly of the limit switch.

[0016] 3. This utility model uses a tightening bolt to compress a movable wedge. During the compression of the movable wedge, it is pushed into the clamping cavity by a fixed wedge, thereby clamping and fixing the static rope. Furthermore, an elastic warning force is applied by a second spring. When the static rope is taut and tension occurs, the movable wedge can be further compressed against the fixed wedge by friction, resulting in a tighter clamping and fixing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a type of anti-collision limiter.

[0018] Figure 2This is a schematic diagram of the fixing mechanism in an anti-collision limiter.

[0019] Figure 3 This is a diagram illustrating the clamping plate in an anti-collision limiter.

[0020] In the diagram: 1. U-shaped fixed back plate; 2. U-shaped mounting plate; 3. Guide rod; 4. First spring; 5. Clamping plate; 6. Limit switch; 7. Trigger frame; 8. Positioning frame; 9. Fixing bolt; 10. Hook seat; 11. Fixing wedge; 12. Clamping cavity; 13. Anti-slip pad; 14. Edge guard; 15. Extension plate; 16. Tightening bolt; 17. Second spring; 18. Movable wedge; 19. Connecting strap. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-3 In this embodiment of the present invention, an anti-collision limiter includes a U-shaped fixed back plate 1. A U-shaped mounting plate 2, adapted to the inner side of the U-shaped fixed back plate 1, is movably disposed thereon. Multiple guide rods 3 are fixedly connected to the inner side of the U-shaped fixed back plate 1. The guide rods 3 slide through the U-shaped mounting plate 2. A circular hole is provided on the U-shaped mounting plate 2 for the guide rods 3 to pass through and slide. A first spring 4 is sleeved on the outer side of each guide rod 3. The first spring 4 is disposed between the top surface of the U-shaped mounting plate 2 and the top inner side of the U-shaped fixed back plate 1. The back of the U-shaped fixed back plate 1... The U-shaped mounting plate 2 is equipped with a fixing mechanism for connecting to the static rope. A clamping plate 5 is provided on the outer side of the U-shaped mounting plate 2. A limit switch 6 is clamped between the clamping plate 5 and the U-shaped mounting plate 2. The limit switch 6 is electrically connected to the controller of the electric winch and can be connected by wire. A corresponding trigger frame 7 is provided below the limit switch 6. The top of the trigger frame 7 is hinged to the bottom of the U-shaped mounting plate 2. The trigger frame 7 and the clamping plate 5 are suspended by a connecting strap 19. The two ends of the connecting strap 19 are respectively tied to the connectors on the trigger frame 7 and the clamping plate 5.

[0023] The first spring 4 forms an elastic buffer between the U-shaped mounting plate 2 and the U-shaped fixed back plate 1. When the limit switch 6, which is clamped and fixed between the clamping plate 5 and the U-shaped mounting plate 2, is triggered, the U-shaped mounting plate 2 can compress the first spring 4 to form a buffer when a delayed stop occurs, thus avoiding rigid compression that could damage the components.

[0024] The clamping plate 5 and the U-shaped mounting plate 2 are fixedly connected to the opposite sides of the positioning frame 8 that is compatible with the limit switch 6. The clamping plate 5 and the U-shaped mounting plate 2 are fixedly installed by fixing bolts 9. The fixing bolts 9 pass through the clamping plate 5 and the U-shaped mounting plate 2 and are threaded with nuts. The four corners of the clamping plate 5 and the U-shaped mounting plate 2 are provided with round holes for the fixing bolts 9 to pass through and move.

[0025] The clamping plate 5 and the U-shaped mounting plate 2 are assembled by fixing bolts 9, and the limit switch 6 is positioned by the positioning frame 8, which facilitates the installation and disassembly of the limit switch 6.

[0026] The fixing mechanism includes a hook seat 10, which is fixedly connected to a U-shaped fixing back plate 1. A fixing wedge 11 is fixedly connected to the inner side of the U-shaped fixing back plate 1 corresponding to the hook seat 10. The fixing wedge 11 is provided with a movable wedge 18 that is adapted to it. A clamping cavity 12 is provided between the movable wedge 18 and the hook seat 10. The clamping cavity 12 is used to clamp and fix the static rope.

[0027] The movable wedge 18 and the hook seat 10 are fixedly connected to the inner wall of the corresponding clamping cavity 12 with anti-slip pads 13.

[0028] A retaining edge 14 is fixedly connected to the inclined edge of the fixed wedge 11. The retaining edge 14 blocks the side wall of the movable wedge 18, and the retaining edge 14 limits the movable wedge 18 to the fixed wedge 11. At the same time, part of the movable wedge 18 is inserted into the hook of the hook seat 10, thereby preventing the movable wedge 18 from falling off.

[0029] An extension plate 15 is fixedly connected above the hook seat 10 corresponding to the fixed wedge block 11. A tightening bolt 16 is threadedly connected to the extension plate 15. A threaded hole for threaded connection of the tightening bolt 16 is opened on the extension plate 15. The tightening bolt 16 abuts against the top surface of the movable wedge block 18. A second spring 17 is sleeved on the outside of the tightening bolt 16. The second spring 17 is located between the extension plate 15 and the movable wedge block 18.

[0030] The movable wedge 18 is squeezed by the tightening bolt 16, and during the squeezing process, the movable wedge 18 is pushed into the clamping cavity 12 by the fixed wedge 11, thereby clamping and fixing the static rope. Furthermore, the second spring 17 applies an elastic warning force. When the static rope is taut and tension occurs, the movable wedge 18 can be further squeezed against the fixed wedge 11 by friction, forming a tighter clamping and fixing effect.

[0031] The working principle of this utility model is as follows:

[0032] In use, place the limit switch 6 between the corresponding clamping plate 5 and the U-shaped mounting plate 2, so that the positioning frame 8 is fastened to the outside of the limit switch 6. At this time, the fixing bolt 9 is used to lock and fix it with the nut. Then, the static rope is put into the clamping cavity 12 through the gap between the head of the hook seat 10 and the fixed wedge 11. At this time, the movable wedge 18 is placed on the fixed wedge 11, and a spring is placed between the movable wedge 18 and the extension plate 15. The tightening bolt 16 is screwed in, and the tightening bolt 16 abuts against the movable wedge 18. Thus, the movable wedge 18 and the hook seat 10 together clamp the static rope, and the second spring 17 forms a warning force to complete the installation and fixing.

[0033] When the hoist reaches the top, the trigger frame 7 is impacted, triggering the limit switch 6, which controls the winch to stop working. If the stop is not timely or delayed, the trigger frame 7 will continue to be lifted. At this time, the U-shaped mounting plate 2 can compress the first spring 4 to form a buffer and avoid rigid collision damage.

[0034] When the hoisting rope is tensioned, the rope can use friction and the elastic force of the second spring 17 to move the movable wedge 18. The movable wedge 18 presses against the fixed wedge 11 to further maintain its proximity to the hook seat 10, thus making the clamping effect stronger.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An anti-collision limiter, comprising a U-shaped fixed back plate (1), characterized in that: The inner side of the U-shaped fixed back plate (1) is movably provided with a U-shaped mounting plate (2) that is adapted to it. Multiple guide rods (3) are fixedly connected to the inner side of the U-shaped fixed back plate (1). The guide rods (3) slide through the U-shaped mounting plate (2). A first spring (4) is sleeved on the outer side of each guide rod (3). The first spring (4) is located between the top surface of the U-shaped mounting plate (2) and the top inner side of the U-shaped fixed back plate (1). The back of the U-shaped fixed back plate (1) is symmetrically provided with a fixing mechanism for connecting with the static rope. A clamping plate (5) is provided on the outer side of the U-shaped mounting plate (2). A limit switch (6) is clamped between the clamping plate (5) and the U-shaped mounting plate (2). A corresponding trigger frame (7) is provided below the limit switch (6). The top of the trigger frame (7) is hinged to the bottom of the U-shaped mounting plate (2). The trigger frame (7) and the clamping plate (5) are suspended by a connecting strap (19).

2. The anti-impact limiter according to claim 1, characterized in that: The clamping plate (5) and the U-shaped mounting plate (2) are fixedly connected to the opposite sides of the positioning frame (8) that is compatible with the limit switch (6). The clamping plate (5) and the U-shaped mounting plate (2) are fixedly installed by fixing bolts (9). The fixing bolts (9) pass through the clamping plate (5) and the U-shaped mounting plate (2) and are threaded with nuts.

3. The anti-impact limiter according to claim 1, characterized in that: The fixing mechanism includes a hook seat (10), which is fixedly connected to a U-shaped fixing back plate (1). A fixing wedge (11) is fixedly connected to the inner side of the hook seat (10) on the U-shaped fixing back plate (1). A movable wedge (18) is provided on the fixed wedge (11) to match it. A clamping cavity (12) is provided between the movable wedge (18) and the hook seat (10).

4. The anti-impact limiter according to claim 3, characterized in that: The movable wedge (18) and the hook seat (10) are fixedly connected to the inner wall of the corresponding clamping cavity (12) with anti-slip pads (13).

5. The anti-impact limiter according to claim 3, characterized in that: The inclined edge of the fixed wedge (11) is fixedly connected to a retaining edge (14), which blocks the side wall of the movable wedge (18).

6. The anti-impact limiter according to claim 3, characterized in that: The hook seat (10) is fixedly connected to the upper part of the fixed wedge block (11) by an extension plate (15). The extension plate (15) is threaded with a clamping bolt (16). The clamping bolt (16) abuts against the top surface of the movable wedge block (18). A second spring (17) is sleeved on the outside of the clamping bolt (16). The second spring (17) is located between the extension plate (15) and the movable wedge block (18).

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