Overload protection device for steel wire rope electric hoist

Abstract

The utility model discloses an overload protection device for a steel wire rope electric hoist, and relates to the technical field of overload protection. An overload protection device for a steel wire rope electric hoist comprises a mounting plate and further comprises a round rod rotationally mounted on the mounting plate, and a steel wire rope of the electric hoist is wound on the round rod; the groove is formed in the round rod; the special-shaped rod is rotationally mounted on the mounting plate, and the special-shaped rod is inserted into the groove; the trapezoid blocks are slidably mounted on the round rod, and the special-shaped rod rotates to drive the round rod to rotate synchronously through the trapezoid blocks; the motor is mounted on the mounting plate and is used for driving the special-shaped rod to rotate; the spring is mounted on the trapezoidal block; if overload occurs, the steel wire rope cannot hoist an object, the round rod does not rotate, the spring is pressed and deformed, the trapezoidal block stretches out and draws back to adapt to rotation of the special-shaped rod and the motor, the stress of the steel wire rope is always within the allowable range, the loss of the steel wire rope is reduced, and the service life of the steel wire rope is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to overload protection technical field, concretely is a kind of steel wire rope electric hoist overload protection device. BACKGROUND

[0002] Steel wire rope electric hoist is used for vertical or horizontal hoisting heavy small hoist, by winding and unwinding steel wire rope to reach the action of lifting and lowering heavy, thus when heavy exceeds the allowable hoisting weight of steel wire rope, there will be the problem of steel wire rope fracture, thus it needs to install overload protection device to prevent steel wire rope fracture.

[0003] A patent application with publication number CN118723814A discloses an overload protection device for electric hoist crane, comprising a power casing, a winding roller, a steel wire rope, a lifting hook and a driving mechanism, further comprising: an overload protection rope installed on both sides of the steel wire rope; an auxiliary protection mechanism comprising an installation cylinder sleeve and a rust removal ring installed on the power casing.

[0004] The above scheme triggers the overload protection mechanism after the steel wire rope lifts the overloading object, so the steel wire rope will be subjected to an impact force exceeding its bearing capacity in a short time. Although the steel wire rope will not immediately break, long-term use will accelerate the wear and tear of the steel wire rope, shorten its service life and increase maintenance costs. UTILITY MODEL CONTENTS

[0005] To overcome the shortcomings of the prior art, the utility model provides a steel wire rope electric hoist overload protection device, which solves the problem of short service life of steel wire rope.

[0006] To achieve the above purpose, the utility model is implemented by the following technical solutions: a steel wire rope electric hoist overload protection device, comprising a mounting plate, further comprising: a round rod rotatably mounted on the mounting plate, the round rod being wound with a steel wire rope of an electric hoist; a groove opened on the round rod; a special-shaped rod rotatably mounted on the mounting plate, the special-shaped rod being inserted into the groove; a plurality of trapezoidal blocks slidably mounted on the round rod, the special-shaped rod rotating to drive the round rod to rotate synchronously through the trapezoidal blocks; a motor mounted on the mounting plate, the motor being used to drive the special-shaped rod to rotate; a spring mounted on the trapezoidal block.

[0007] Preferably, it further comprises a plurality of push plates slidably mounted on the round rod, the push plates being used to push the trapezoidal blocks to slide.

[0008] Preferably, it further comprises: a circular ring rotatably mounted on the mounting plate; a plurality of arc-shaped rods used to drive the push plates to slide, both ends of the arc-shaped rods being rotatably connected with the circular ring and the push plates respectively.

[0009] Preferably, further comprising: a plurality of sensors mounted on the round rod, both ends of the spring are connected with the sensor and the trapezoidal block respectively; an alarm structure mounted on the surface of the mounting plate, the sensor is electrically connected with the alarm structure.

[0010] Preferably, further comprising: a connecting rod fixedly mounted on the sensor; a telescopic rod mounted between the connecting rod and the mounting plate, the sensor is slidingly connected with the round rod.

[0011] Preferably, further comprising a plurality of protective ropes wound on the round rod, the other end of the protective rope is connected with the hook of the electric hoist, when the steel wire rope of the hook is in a tight state, the protective rope is in a relaxed state.

[0012] The utility model provides a kind of steel wire rope electric hoist overload protection device.Compared with prior art, it has the following beneficial effects:

[0013] 1、The steel wire rope electric hoist overload protection device, by motor driving special-shaped rod rotation, trapezoidal block and round rod synchronous rotation are driven, round rod rotation makes that steel wire rope is wound on round rod, i.e.

[0014] 2、The steel wire rope electric hoist overload protection device, by setting push plate, after hoisting object, control push plate sliding, push plate sliding is contacted with trapezoidal block in the process and trapezoidal block is pushed and slides, until trapezoidal block and special-shaped rod are close, at this time spring is in relaxed state, to reduce the use time of spring, prolong the service life of spring.

[0015] 3、The steel wire rope electric hoist overload protection device, by setting induction, before hoisting, control telescopic rod to extend a distance, to make that sensor moves, spring is compressed, sensor can detect the force condition at this time, to judge whether the spring force is in normal range, if there is problem, alarm structure can be sent alarm, to notify operator to replace. ACCURACY OF DRAWINGS

[0016] Figure 1 A three-dimensional structure schematic diagram of the steel wire rope electric hoist overload protection device is provided for the utility model;

[0017] Figure 2 A cross-sectional three-dimensional structure schematic diagram of the mounting plate of the utility model is provided;

[0018] Figure 3 A structure schematic diagram of the push plate of the utility model is provided;

[0019] Figure 4 Figure is the separation structure diagram of the special-shaped rod of the utility model.

[0020] In the figure: 1, mounting plate; 2, round rod; 3, alarm structure; 5, motor; 6, special-shaped rod; 7, groove; 8, trapezoidal block; 9, spring; 10, circular ring; 11, arc-shaped rod; 12, push plate; 13, inductor; 14, connecting rod; 15, telescopic rod; 16, protective rope. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a steel wire rope electric hoist overload protection device, including mounting plate 1, further comprising: round rod 2 is rotationally installed on the mounting plate 1, the steel wire rope of electric hoist is wound on the round rod 2;Groove 7 is opened on the round rod 2;Special-shaped rod 6 is rotationally installed on the mounting plate 1, the special-shaped rod 6 is inserted into the groove 7;Several trapezoidal blocks 8 are slidably installed on the round rod 2, the special-shaped rod 6 rotates through the trapezoidal block 8 to drive the round rod 2 synchronous rotation;Motor 5 is installed on the mounting plate 1, and the motor 5 is used to drive the special-shaped rod 6 to rotate;Spring 9 is installed on the trapezoidal block 8.

[0023] In use, the special-shaped rod 6 is driven to rotate by motor 5, drives the trapezoidal block 8 and the round rod 2 synchronous rotation, and the round rod 2 rotates to make the steel wire rope wind on the round rod 2, i.e. the action of hoisting can be realized, if overload occurs, the steel wire rope cannot hoist object, and the round rod 2 does not rotate, at this time, spring 9 is deformed under pressure, and the trapezoidal block 8 is telescopic to adapt the rotation of special-shaped rod 6 and motor 5, so that the stress of steel wire rope is always within its allowable range, reduce the loss of steel wire rope, increase the service life of steel wire rope.

[0024] Please refer to Figures 3-4 Further comprising several push plates 12 slidably installed on the round rod 2, and the push plate 12 is used to push the trapezoidal block 8 to slide.

[0025] The scheme is used in the process, before the steel wire rope hoisting goods, sliding push plate 12, so that the push plate 12 and trapezoidal block 8 is not in contact, when hoisting object, control push plate 12 sliding, push plate 12 sliding in the process and trapezoidal block 8 contact and push trapezoidal block 8 sliding, until trapezoidal block 8 and special-shaped rod 6 close, at this time the spring 9 is in relaxed state, to reduce the use time of spring 9, prolong the service life of spring 9.

[0026] Please refer to Figures 3-4 , further comprising: rotatingly installed on the mounting plate 1 ring 10; a plurality of arc-shaped rod 11 for driving the push plate 12 sliding, the two ends of the arc-shaped rod 11 are respectively connected with the ring 10 and the push plate 12.

[0027] The scheme in the process of use, by rotating ring 10, drive arc-shaped rod 11 rotation, can drive all push plate 12 relative to the circular rod 2 sliding, convenient to use.

[0028] Please refer to Figures 1-4 , further comprising: a plurality of sensors 13 mounted on the circular rod 2, the two ends of the spring 9 are respectively connected with the sensor 13 and the trapezoidal block 8; alarm structure 3 installed on the surface of the mounting plate 1, the sensor 13 and the alarm structure 3 are electrically connected.

[0029] The scheme in the process of use, in the process of hoisting, trapezoidal block 8 relative to the circular rod 2 sliding, will extrude spring 9, so that the spring 9 tight, spring 9 force can be transmitted to the sensor 13, when the sensor 13 detects that the pressure is too large, then through the alarm structure 3 alarm, in order to operate personnel in time processing.

[0030] Please refer to Figures 3-4 , further comprising: fixedly installed on the sensor 13 connecting rod 14; telescopic rod 15 installed between the connecting rod 14 and the mounting plate 1, the sensor 13 and the circular rod 2 sliding connection.

[0031] The scheme in the process of use, before hoisting, control telescopic rod 15 stretch a distance, so that the sensor 13 moves, spring 9 is compressed, the sensor 13 can detect the force at this time, to determine whether the spring 9 elastic force is in the normal range, if there is a problem can be through the alarm structure 3 alarm, to inform the operator to replace.

[0032] Please refer to Figures 1-2 , further comprising a plurality of winding on the circular rod 2 protective rope 16, the other end of the protective rope 16 and electric hoist hook connection, the steel wire rope of hook is in tight state, the protective rope 16 is in relaxed state.

[0033] The present scheme protects the articles after the steel wire rope is broken during use through the protection rope 16, and avoids the problem of damage caused by falling to the ground.

[0034] In the utility model, when the device is used, first, the telescopic rod 15 is controlled to extend for a distance, so that the inductor 13 moves and the spring 9 is compressed, the inductor 13 can detect the stress at the moment, so as to determine whether the elasticity of the spring 9 is within the normal range, if there is a problem, the alarm structure 3 can send an alarm to notify the operator to replace, then the motor 5 is controlled to drive the special-shaped rod 6 to rotate, driving the trapezoidal block 8 and the round rod 2 to rotate synchronously, the round rod 2 rotates to make the steel wire rope wind on the round rod 2, so that the lifting action can be realized, if overload occurs, the steel wire rope cannot lift the object, the round rod 2 does not rotate, at this moment, the spring 9 is deformed under pressure, the trapezoidal block 8 is telescopic to adapt to the rotation of the special-shaped rod 6 and the motor 5, so that the stress of the steel wire rope is always within the allowable range, after the object is lifted, the circular ring 10 is controlled to rotate, the circular ring 10 pushes the push plate 12 to slide through the arc-shaped rod 11, the push plate 12 contacts and pushes the trapezoidal block 8 to slide in the process of sliding, until the trapezoidal block 8 is close to the special-shaped rod 6, at this moment, the spring 9 is in a relaxed state, so as to reduce the use time of the spring 9 and prolong the service life of the spring 9. The contents not described in detail in the specification all belong to the prior art known to those skilled in the art.

[0035] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, inclusion of an element in a list of elements does not exclude other identical elements not expressly listed.

[0036] Although embodiments of the present utility model have been shown and described, it will be understood by those having ordinary skill in the art that various changes, modifications, alternatives, and variations can be made to the embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An overload protection device for a steel wire rope electric hoist, comprising a mounting plate (1), characterized in that: Also include: The round rod (2) is rotatably installed on the mounting plate (1), and the steel wire rope of the electric hoist is wound on the round rod (2); The groove (7) is opened on the round rod (2); The special-shaped rod (6) is rotatably installed on the mounting plate (1), and the special-shaped rod (6) is inserted into the groove (7); A plurality of trapezoidal blocks (8) are slidably installed on the round rod (2), and the special-shaped rod (6) rotates through the trapezoidal blocks (8) to drive the round rod (2) to rotate synchronously; The motor (5) is installed on the mounting plate (1), and the motor (5) is used for driving the special-shaped rod (6) to rotate; The spring (9) is installed on the trapezoidal block (8).

2. A steel wire rope electric hoist overload protection device according to claim 1, characterized in that: Also include a plurality of push plates (12) slidably installed on the round rod (2), and the push plate (12) is used for pushing the trapezoidal block (8) to slide.

3. A steel wire rope electric hoist overload protection device according to claim 2, characterized in that: Also include: The round ring (10) is rotatably installed on the mounting plate (1); A plurality of arc-shaped rods (11) for driving the push plate (12) to slide, both ends of the arc-shaped rod (11) are rotatably connected with the round ring (10) and the push plate (12) respectively.

4. A steel wire rope electric hoist overload protection device according to claim 3, characterized in that: Also include: A plurality of inductors (13) are installed on the round rod (2), both ends of the spring (9) are connected with the inductor (13) and the trapezoidal block (8) respectively; The alarm structure (3) is installed on the surface of the mounting plate (1), and the inductor (13) is electrically connected with the alarm structure (3).

5. A steel wire rope electric hoist overload protection device according to claim 4, characterized in that: Also include: The connecting rod (14) is fixedly installed on the inductor (13); The telescopic rod (15) is installed between the connecting rod (14) and the mounting plate (1), and the inductor (13) is slidably connected with the round rod (2).

6. A steel wire rope electric hoist overload protection device according to claim 1, characterized in that: Also include a plurality of protective ropes (16) wound on the round rod (2), and the other end of the protective rope (16) is connected with the hook of the electric hoist, when the steel wire rope of the hook is in a tense state, the protective rope (16) is in a relaxed state.

Images