Safety height limiting device for hoisting machinery

Abstract

The utility model relates to the technical field of hoisting machinery structures, in particular to a hoisting machinery safety height limiting device which is provided with a screwing mechanism driven by a motor for pin locking movement, is stable in operation and good in locking effect, and improves reliability. Comprising a limiting box, a pin movable sleeve, a lock pin, fixing frames, a connecting frame, a reciprocating motor, a threaded rod, a movable plate, a sliding sleeve, a restraining frame, a hinge, a box cover and a threaded pipe, the middle portions of the upper side and the lower side of the limiting box are each connected with one fixing frame, the front middle side of the interior of the limiting box is connected with the outer side of the reciprocating motor through the connecting frame, and the output end of the reciprocating motor is connected with the front side of the threaded rod; the rear side of the threaded pipe is connected with the middle of the front side of the movable plate, the inner middle side of the rear portion of the limiting box is connected with the outer side of the pin movable sleeve, the inner side of the pin movable sleeve is slidably connected with the outer side of the lock pin, the limiting box is open in the front side and the left side, and the rear side of the left end of the limiting box is movably connected with the front side of the right end of the box cover through a hinge.

Description

Technical Field

[0001] This utility model relates to the technical field of lifting machinery structures, specifically a safety height limiting device for lifting machinery. Background Technology

[0002] Lifting machinery refers to electromechanical equipment used for vertically lifting or vertically lifting and horizontally moving heavy objects. It primarily uses a lifting hook or other lifting device to lift or move heavy objects. The working process of lifting machinery generally includes steps such as lifting, moving, lowering, and returning to the original position. During the operation of lifting machinery, height limiters are often used to maintain the lifted goods at a certain height to meet the construction needs at different heights.

[0003] An existing easy-to-install lifting machinery height limiter, such as the one with patent publication number CN219174063U, is described. When in operation, the motor drives the sector wheel to rotate through the regulation of an external control switch group. When the distal arc surface of the sector wheel disengages from the T-shaped limit post, the T-shaped limit post extends from the inside of the housing due to the pushing action of the sector wheel and inserts into the corresponding limit hole on the winch main shaft of the external lifting machinery. By limiting the rotation of the traction machine, the hoisting rope maintains a suitable length for winding and unwinding, thereby achieving the height limit function of the lifting machinery. Subsequently, the electric push rod extends, causing the semi-circular brake pad on the left end of its telescopic end to make close contact with the output shaft of the motor, thereby locking the angle of the sector wheel. The limit rod and the limit slide cooperate to provide further guiding and limiting function for the T-shaped limit post, ensuring the stability of the T-shaped limit post during operation.

[0004] However, this device relies on a motor to drive the limit post and brake pads, which is costly but has unstable performance and poor reliability. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a lifting machinery safety height limiting device with a screw mechanism driven by a motor for locking pin movement, which is stable in operation, has a good locking effect, and improves reliability.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a safety height limiting device for lifting machinery, comprising a limiting box, a movable pin sleeve, a locking pin, a fixing frame, a connecting frame, a reciprocating motor, a threaded rod, a movable plate, a sliding sleeve, a constraint frame, a hinge, a box cover, and a threaded tube. A set of fixing frames is connected to the upper and lower middle sections of the limiting box. The front middle side of the inside of the limiting box is connected to the outside of the reciprocating motor via the connecting frame. The output end of the reciprocating motor is connected to the front side of the threaded rod. The outer wall of the threaded rod is screwed to the inner wall of the threaded tube. The threaded tube is connected to the middle of the front side of the movable plate. A set of sliding sleeves is provided on the inner side of the upper and lower parts of the movable plate. A set of constraint frames is connected to the upper and lower sides of the rear end of the limiting box. The outer wall of each set of constraint frames is slidably connected to the inner wall of a set of sliding sleeves. The middle of the rear side of the movable plate is connected to the front side of the locking pin. The inner side of the rear part of the limiting box is connected to the outer side of the movable pin sleeve. The inner side of the movable pin sleeve is slidably connected to the outer side of the locking pin. The limiting box is open on the front and left sides, and the rear side of the left end of the limiting box is movably connected to the front side of the right end of the box cover via a hinge.

[0009] Preferably, it also includes fixing plates, bolts and screw slots. The upper and lower sides of the left rear end of the box cover are respectively connected to the inner side of a set of fixing plates. Each set of fixing plates is movably provided with a set of bolts. The upper and lower sides of the right front end of the limiting box are respectively connected to a set of screw slots.

[0010] Preferably, it also includes an oil injection nozzle, wherein the left side of the outer end of the movable sleeve of the pin inside the limiting box is connected to the inner side of the oil injection nozzle.

[0011] Preferably, it also includes an oil filling cap, wherein the outer side of the oil filling nozzle and the inner side of the oil filling cap are detachably installed.

[0012] Preferably, it also includes a pull-wire encoder and a connecting wire, the lower rear end of the bolt is connected to the front end of the pull-wire encoder, the input end of the pull-wire encoder is movably connected to the front end of the connecting wire, the rear end of the connecting wire is connected to the lower front end of the movable plate, and the output end of the pull-wire encoder is communicatively connected to the control system.

[0013] Preferably, it also includes an information board, with the upper right side of the limiting box connected to the inner side of the information board.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a safety height limiting device for lifting machinery, which has the following beneficial effects:

[0016] The limit box is fixed to the corresponding position on the traction machine by a fixing frame. Inside the limit box, a connecting frame fixes the reciprocating motor. When the reciprocating motor runs, the threaded rod rotates. Under the sliding constraint of two sets of sliding sleeves and the constraint frame, the threaded tube of the movable plate is circumferentially fixed. The threaded rod is screwed into the threaded tube and can slide under the constraint of the movable plate connecting locking pin. When the locking pin slides outward, it can lock the traction machine. After it is in place, the reciprocating motor stops. The threaded rod and the threaded tube are self-locked by the thread. When the box cover is opened under the constraint of the hinge, the internal structure of the limit box can be exposed, which is convenient for internal inspection and maintenance. The motor-driven screw mechanism is set up for the locking pin movement. Its operation is stable, the locking effect is good, and the reliability is improved. Attached Figure Description

[0017] Figure 1 This is an axial view of the structural schematic diagram of this utility model;

[0018] Figure 2 This utility model Figure 1 The right view;

[0019] Figure 3 This utility model Figure 1 Front view;

[0020] Figure 4 This utility model Figure 1 The top view.

[0021] The following are labels in the attached diagram: 1. Limit box; 2. Pin movable sleeve; 3. Locking pin; 4. Fixing bracket; 5. Connecting bracket; 6. Reciprocating motor; 7. Threaded rod; 8. Movable plate; 9. Sliding sleeve; 10. Constraint bracket; 11. Hinge; 12. Box cover; 13. Threaded tube; 14. Fixing plate; 15. Bolt; 16. Threaded groove bracket; 17. Oil injection nozzle; 18. Oil injection cap; 19. Pull-wire encoder; 20. Connecting wire; 21. Information board. Detailed Implementation

[0022] 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.

[0023] Example

[0024] Please see Figure 1-4A safety height limiting device for lifting machinery includes a limiting box 1, a movable pin sleeve 2, a locking pin 3, a fixing frame 4, a connecting frame 5, a reciprocating motor 6, a threaded rod 7, a movable plate 8, a sliding sleeve 9, a constraint frame 10, a hinge 11, a box cover 12, and a threaded tube 13. A set of fixing frames 4 are connected to the upper and lower middle sections of the limiting box 1. The front middle section of the limiting box 1 is connected to the outer side of the reciprocating motor 6 via the connecting frame 5. The output end of the reciprocating motor 6 is connected to the front side of the threaded rod 7. The outer wall of the threaded rod 7 is screwed to the inner wall of the threaded tube 13. The rear side of the threaded tube 13 is connected to the front middle section of the movable plate 8. A set of sliding sleeves 9 are respectively provided on the upper and lower inner sides of the movable plate 8. A set of constraint frames 10 are respectively connected to the upper and lower rear sides of the limiting box 1. The outer wall of each constraint frame 10 is slidably connected to the inner wall of a set of sliding sleeves 9. The rear middle section of the movable plate 8 is connected to the front side of the locking pin 3. The rear middle inner side of the limiting box 1 is connected to the movable pin sleeve. 2. The outer side is connected, and the inner side of the movable sleeve 2 is slidably connected to the outer side of the locking pin 3. The limiting box 1 is open on the front and left sides, and the rear left side of the limiting box 1 is movably connected to the front right side of the box cover 12 via the hinge 11. The limiting box 1 is fixed in the corresponding position of the traction machine via the fixing frame 4. The reciprocating motor 6 is fixedly connected to the inside of the limiting box 1 via the connecting frame 5. When the reciprocating motor 6 runs, the threaded rod 7 rotates. Under the sliding constraint of the two sets of sliding sleeves 9 and the constraint frame 10, the threaded tube 13 of the movable plate 8 is circumferentially fixed. The threaded rod 7 is screwed into the threaded tube 13 and can slide under the constraint of the movable sleeve 2 via the locking pin 3 connected to the movable plate 8. When the locking pin 3 slides outward, it can lock the traction machine. After it is in place, the reciprocating motor 6 stops. The threaded rod 7 and the threaded tube 13 are self-locked by the thread. When the box cover 12 is opened under the constraint of the hinge 11, the internal structure of the limiting box 1 can be exposed, which is convenient for internal inspection and maintenance.

[0025] It also includes a fixing plate 14, bolts 15, and a screw groove bracket 16. The upper and lower sides of the left rear end of the box cover 12 are respectively connected to the inner side of a set of fixing plates 14. Each set of fixing plates 14 is movably provided with a set of bolts 15. The upper and lower sides of the right front end of the limiting box 1 are respectively connected to a set of screw groove brackets 16. When the box cover 12 is closed, the fixing plates 14 can be aligned with the screw groove brackets 16. By turning the bolts 15, they can pass through the fixing plates 14 and be screwed into the screw groove brackets 16 to close and fix the box cover 12, thereby improving reliability.

[0026] It also includes an oil nozzle 17, and the left side of the outer end of the movable pin sleeve 2 inside the limit box 1 is connected to the inner side of the oil nozzle 17; oil can be injected into the movable pin sleeve 2 through the oil nozzle 17 for convenient lubrication and maintenance.

[0027] It also includes an oil filling cap 18, and the outer side of the oil filling nozzle 17 and the inner side of the oil filling cap 18 can be detachably installed; after the oil filling cap 18 is installed on the outer side of the oil filling nozzle 17, the inside of the oil filling nozzle 17 can be sealed and protected, improving reliability.

[0028] It also includes a draw wire encoder 19 and a connecting wire 20. The lower rear end of the bolt 15 is connected to the front end of the draw wire encoder 19. The input end of the draw wire encoder 19 is movably connected to the front end of the connecting wire 20. The rear end of the connecting wire 20 is connected to the lower front end of the movable plate 8. The output end of the draw wire encoder 19 is communicatively connected to the control system. The draw wire encoder 19 is preferably a draw wire displacement sensor of the Is-xf reciprocating motor 6. When the movable plate 8 moves, it can pull the connecting wire 20 to move. The connecting wire 20 acts on the draw wire encoder 19 to output a signal for convenient and precise control.

[0029] It also includes an information board 21, with the upper right side of the limit box 1 connected to the inner side of the information board 21; the information board 21 can display information about the device, making it easier to read and use, and improving convenience.

[0030] In summary, when a lifting machinery safety height limiting device is in use, after the cover 12 is closed, the fixing plate 14 aligns with the screw groove frame 16. Tightening the bolt 15 allows it to pass through the fixing plate 14 and be screwed into the screw groove frame 16, thus closing and fixing the cover 12 and protecting the internal structure. The limiting box 1 is fixed to the corresponding position on the traction machine via the fixing frame 4. Inside the limiting box 1, the reciprocating motor 6 is fixedly connected via the connecting frame 5. When the reciprocating motor 6 runs, the threaded rod 7 rotates. Under the sliding constraint of the two sets of sliding sleeves 9 and the constraint frame 10, the threaded tube 13 connected to the movable plate 8 is circumferentially fixed. The threaded rod 7, through its screw engagement with the threaded tube 13, can slide under the constraint of the movable sleeve 2 via the locking pin 3 connected to the movable plate 8. The locking pin 3 can slide outward to lock the traction machine. When the movable plate 8 moves, it can pull the connecting line 20 to move. The connecting line 20 acts on the pull-wire encoder 19 to output a signal for convenient and precise control. After it is in place, the reciprocating motor 6 stops. It is fixed by the threaded rod 7 and the threaded tube 13. When the box cover 12 is opened under the constraint of the hinge 11, the internal structure of the limit box 1 can be exposed, which is convenient for internal inspection and maintenance. In addition, oil can be injected into the pin movable sleeve 2 through the oil injection nozzle 17 for convenient lubrication and maintenance. After the oil injection cap 18 is installed on the outside of the oil injection nozzle 17, the inside of the oil injection nozzle 17 can be sealed and protected. The information plate 21 can display the information of this device, which is convenient for reading and assisting in use, thus improving convenience.

[0031] The reciprocating motor 6 and the wire encoder 19 are commercially available devices known to those skilled in the art. We are simply using them here without making any structural or functional improvements, and we will not elaborate further on them here.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety height limiting device for lifting machinery, characterized in that, The system includes a limiting box (1), a movable pin sleeve (2), a locking pin (3), a fixing frame (4), a connecting frame (5), a reciprocating motor (6), a threaded rod (7), a movable plate (8), a sliding sleeve (9), a constraint frame (10), a hinge (11), a box cover (12), and a threaded tube (13). A set of fixing frames (4) is connected to the middle of the upper and lower sides of the limiting box (1). The front middle side of the inside of the limiting box (1) is connected to the outside of the reciprocating motor (6) via the connecting frame (5). The output end of the reciprocating motor (6) is connected to the front side of the threaded rod (7). The outer wall of the threaded rod (7) is screwed to the inner wall of the threaded tube (13). The rear side of the threaded tube (13) is connected to the movable pin sleeve (2), a locking pin (3), a fixing frame (4), a connecting frame (5), a reciprocating motor (6), a threaded rod (7), a movable plate (8), a sliding sleeve (9), a constraint frame (10), a hinge (11), a box cover (12), and a threaded tube (13). The front middle of the plate (8) is connected, and a set of sliding sleeves (9) are respectively provided on the inner side of the upper and lower parts of the movable plate (8). A set of constraint frames (10) are respectively connected to the upper and lower sides of the inner rear end of the limiting box (1). The outer wall of each set of constraint frames (10) is slidably connected to the inner wall of a set of sliding sleeves (9). The rear middle of the movable plate (8) is connected to the front side of the locking pin (3). The inner side of the rear middle of the limiting box (1) is connected to the outer side of the pin movable sleeve (2). The inner side of the pin movable sleeve (2) is slidably connected to the outer side of the locking pin (3). The limiting box (1) is open on the front and left sides, and the rear side of the left end of the limiting box (1) is movably connected to the front side of the right end of the box cover (12) via a hinge (11).

2. The lifting machinery safety height limiting device according to claim 1, characterized in that: It also includes a fixing plate (14), a bolt (15) and a screw groove bracket (16). The upper and lower sides of the left rear end of the box cover (12) are respectively connected to the inner side of a set of fixing plates (14). Each set of fixing plates (14) is movably provided with a set of bolts (15). The upper and lower sides of the right front end of the limiting box (1) are respectively connected to a set of screw groove brackets (16).

3. The lifting machinery safety height limiting device according to claim 1, characterized in that: It also includes an oil nozzle (17), and the left side of the outer end of the movable sleeve (2) inside the limiting box (1) is connected to the inner side of the oil nozzle (17).

4. The lifting machinery safety height limiting device according to claim 3, characterized in that: It also includes an oil filling cap (18), the outer side of the oil filling nozzle (17) and the inner side of the oil filling cap (18) can be detachably installed.

5. A safety height limiting device for lifting machinery according to claim 2, characterized in that: It also includes a pull-wire encoder (19) and a connecting line (20). The lower rear end of the bolt (15) is connected to the front side of the pull-wire encoder (19). The input end of the pull-wire encoder (19) is movably connected to the front side of the connecting line (20). The rear side of the connecting line (20) is connected to the lower front end of the movable plate (8). The output end of the pull-wire encoder (19) is communicatively connected to the control system.

6. The lifting machinery safety height limiting device according to claim 1, characterized in that: It also includes an information board (21), the upper right side of the limiting box (1) is connected to the inner side of the information board (21).

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