CN214422129U - Lifting limiting device for crane hook - Google Patents

Abstract

The utility model discloses a hoist lifting hook stop device that rises, including playing to rise the control box, play to rise the inner chamber middle part fixed mounting of control box and have the angle piece, the top that the inner chamber that plays to rise the control box is located the angle piece respectively fixed mounting have micro-gap switch and circuit breaker, and the inner chamber that plays to rise the control box is equipped with the main connecting rod that runs through the angle piece, and the top of main connecting rod is equipped with control mechanism, and the bottom of main connecting rod runs through to play to rise the control box and is equipped with trigger mechanism. Can drive the main connecting rod through trigger mechanism and move down, trigger micro-gap switch and circuit breaker respectively through control mechanism at the in-process that removes, accomplish to rise one-level protection and the second grade protection of overtravel, this device is at the in-process that uses, can avoid spacing part and wire rope friction, and is simple reasonable, spacing accurate, and the process of triggering is comparatively rapid, and the requirement to the mounting bracket is relatively lower simultaneously, and the installation controlling part that occupies is less, is applicable to the hoist of different tonnages.

Description

Lifting limiting device for crane hook

Technical Field

The utility model relates to a hoist technical field, concretely relates to hoist lifting hook stop device that rises.

Background

In the actual use process of the crane, the safety limit of the crane is always a serious problem for preventing the normal operation of the equipment. In recent years, due to the reasons of improper configuration, missing damage, failure of upper limit during lifting and the like of a height limiter in crane accidents, operators do not pay attention to the actual lifting height of a lifting hook in the operation process, so that a lifting mechanism is over-stroke and rushes to the top, and equipment damage and personnel injury are easily caused. At present common carry out spacing mode to the lifting hook and have respectively through formula stopper of breaking fire, weight formula stopper or clamp plate formula stopper, carry on spacingly through above several kinds of stoppers and can have following shortcoming:

disconnected fire formula stopper: the structure is relatively complex, the requirement on installation is relatively high, and the space is occupied;

heavy hammer type limiter: the steel wire rope penetrates through the closed steel ring on the heavy hammer, and the steel wire rope continuously rubs with the steel ring by moving up and down, left and right to lift, so that the steel wire rope and the steel ring are damaged; the steel wire rope needs to be separated when the steel ring is replaced subsequently, and the steel wire rope penetrates through the free end of the steel wire rope, so that time and labor are wasted, and especially, the clearance space can be reduced when the large-tonnage crane is used;

pressing plate type limiting stopper: the contact rocker arm between the pressure plate and the lifting hook is longer, the reaction speed is slower, and the clearance space can be reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hoist lifting hook stop device that rises to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a hoist lifting hook stop device that rises, is including playing to rise the control box, the inner chamber middle part fixed mounting who plays to rise the control box has the horn piece, the top that the inner chamber that plays to rise the control box is located the horn piece is fixed mounting respectively has micro-gap switch and circuit breaker, micro-gap switch is located the inner chamber back lateral wall that plays to rise the control box, the circuit breaker is located the inner chamber left side wall that plays to rise the control box, the inner chamber that plays to rise the control box is equipped with the main connecting rod that runs through the horn piece, the top of main connecting rod is equipped with control mechanism, and the bottom of main connecting rod runs through to play to rise the control box and is equipped with trigger mechanism.

Preferably, control mechanism includes fixed block, slope limit and horizontal plectrum, the top fixed connection that the fixed block is located the angle piece is at the lateral wall of main connecting rod, slope limit integrated into one piece is in the bottom of fixed block, horizontal plectrum fixed connection is at the lateral wall of circuit breaker top fixed block.

Preferably, trigger mechanism includes limit baffle, connecting plate, the board that resets, reset frame and reset spring, it is articulated mutually with the main connecting rod that last limit baffle passes through the connecting plate, be equipped with coupling assembling between connecting plate and the play to rise the control box, reset board fixed mounting is at the lateral wall of main connecting rod, reset the board and be located the inner chamber of reset frame, reset between board and the reset frame fixed mounting have reset spring.

Preferably, coupling assembling includes first connecting block and second connecting block, first connecting block fixed connection is at the lateral wall of connecting plate, second connecting block fixed connection is at the left side lower surface that plays to rise the control box, it is articulated each other between first connecting block and the second connecting block.

Preferably, the outer side wall of the main connecting rod below the corner piece is fixedly provided with a mounting block, and the side wall of the mounting block is fixedly provided with a guide rod penetrating through the corner piece.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a hoist lifting hook stop device that rises, set up control mechanism and trigger mechanism respectively through the upper and lower both ends at the main connecting rod, at the in-process that the lifting hook rises, can drive the main connecting rod downstream through trigger mechanism, in-process that removes triggers micro-gap switch and circuit breaker respectively through control mechanism, accomplish to rise the one-level protection and the second grade protection of overtravel to rising, this device is at the in-process that uses, can avoid spacing part and wire rope friction, it is simple reasonable, spacing accurate, the process that triggers is comparatively rapid, simultaneously, relatively lower to the requirement of mounting bracket, the installation controlling part that occupies is less, be applicable to the hoist of different tonnages.

Drawings

Fig. 1 is a schematic structural view of the present invention assembled with a crane.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic mechanism diagram of the triggering mechanism of the present invention.

In the figure: 1. play to rise control box, 2, micro-gap switch, 3, circuit breaker, 4, mounting bracket, 5, angle piece, 6, main connecting rod, 7, trigger mechanism, 71, go up spacing baffle, 72, connecting plate, 73, the board that resets, 74, reset shelf, 75, reset spring, 8, coupling assembling, 81, first connecting block, 82, second connecting block, 9, control mechanism, 91, fixed block, 92, slope limit, 93, horizontal plectrum, 10, installation piece, 11, guide bar.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, fig. 2 and fig. 3, the present invention provides a technical solution: a lifting limiting device of a crane lifting hook comprises a lifting control box 1, wherein a microswitch 2 and a circuit breaker 3 are respectively and fixedly installed in an inner cavity of the lifting control box 1, the directions of 'up, down, left, right' and the like in the technical scheme are all based on the attached drawing 2 of the specification, the circuit breaker 3 is fixedly installed on the left side wall of the inner cavity of the lifting control box 1, the microswitch 2 is fixedly installed in the lifting control box 1 through an installation frame 4 and is specifically positioned on the rear side wall of the inner cavity of the control box 1, the installation frame 4 is fixedly installed on the surface of a corner piece 5, the corner piece 5 is welded in the middle of the inner cavity of the lifting control box 1, the microswitch 2 and the circuit breaker 3 are both positioned above the corner piece 5, the microswitch 2 is electrically connected with a lifting electric loop of a crane, and when the microswitch 2 is triggered, a control circuit of the lifting electric loop is cut off, so as to realize the primary protection of lifting overtravel, the circuit breaker 3 is connected with a power supply of the crane, and after the circuit breaker 3 is turned off, the power supply of the crane is cut off, so that the secondary protection of lifting and overtravel is realized, and the purpose of dual protection is realized.

A main connecting rod 6 penetrating through the corner piece 5 is assembled in the lifting control box 1, the bottom of the main connecting rod 6 penetrates through the lifting control box 1 and then is fixedly connected with a trigger mechanism 7, and the main connecting rod 6 can be driven to move downwards through the trigger mechanism 7.

The trigger mechanism 7 comprises an upper limit baffle 71, as shown in fig. 1, the upper limit baffle 71 is located above a crane hook, the side wall of the upper limit baffle 71 is hinged with the bottom of the main connecting rod 6 through a connecting plate 72, the number of the connecting plates 72 is two, in the view angle of fig. 2, the two connecting plates 72 are symmetrically distributed in the front-back direction, a certain space is formed between the connecting plates 72, a lifting rope for lifting the hook in the crane passes through the space between the connecting plates 72, a first connecting block 81 is welded on the side wall of the connecting plate 72, a second connecting block 82 is welded on the lower surface of the left side of the lifting control box 1, the first connecting block 81 is hinged with the second connecting block 82, the first connecting block 81 and the second connecting block 82 form a connecting component 8, a lever mechanism is formed between the upper limit baffle 71 and the connecting plate 72 as well as between the upper limit baffle 71 and the main connecting rod 6 through the connecting component 8, and when the upper limit baffle 71 is subjected to upward force, the upper limit baffle is transmitted to the main connecting rod 6, the main connecting rod 6 is enabled to move downwards, the reset plate 73 is integrally formed on the side wall of the main connecting rod 6, the reset frame 74 is integrally formed at the bottom of the lifting control box 1, the reset plate 73 is located in the inner cavity of the reset frame 74, the reset spring 75 is fixedly installed between the reset plate 73 and the reset frame 74, and the main connecting rod 6 can be reset through the reset spring 75.

The top of the main connecting rod 6 is provided with a control mechanism 9, the control mechanism 9 is driven to move downwards by the main connecting rod 6 to trigger the microswitch 2 and the breaker 3, the control mechanism 9 comprises a fixed block 91 sleeved on the outer side wall of the main connecting rod 6, the fixed block 91 is fixedly connected with the main connecting rod 6, the bottom of the fixed block 91 is integrally formed with an inclined edge 92, the inclined edge 92 is positioned above a trigger piece of the microswitch 2, the inclined edge 92 triggers the trigger piece of the microswitch 2 in the process that the main connecting rod 6 drives the fixed block 91 to move downwards, so that the microswitch 2 cuts off a control circuit of an ascending electrical loop, the side wall of the fixed block is welded with a transverse shifting piece 93, the transverse shifting piece 93 is positioned above the inclined edge 92, meanwhile, the transverse shifting piece 93 corresponds to the position of the control switch in the breaker 3 and is positioned right above the control switch in the breaker 3, when the transverse shifting piece 93 moves downwards, the control switch of the breaker 3 can be triggered, the circuit breaker 3 is used for cutting off a power supply, and the second-stage protection of lifting and overtravel is realized.

The welding of the lateral wall of main connecting rod 6 has installation piece 10, installation piece 10 is located the below of fillet 5, the welding of the lateral wall of installation piece 10 has guide bar 11, guide bar 11 is the L type, fillet 5 is run through on the top of guide bar 11, through setting up guide bar 11, make main connecting rod 6 descend or the in-process that rises keeps the linear movement of vertical direction, avoid main connecting rod 6 to take place the rotation to the position that leads to horizontal plectrum 93 changes.

The working principle is as follows: the utility model is shown in the attached figure 1 of the specification, when the lifting hook of the crane continuously rises, the top of the hook moves upwards to contact with the upper limit baffle 71, the upper limit baffle 71 moves upwards and then is connected with the connecting component 8 through the connecting plate 72, so that the main connecting rod 6 moves vertically downwards, in the process that the main connecting rod 6 moves downwards, firstly, the inclined edge 92 integrally formed on the side wall of the fixed block 91 is contacted with the trigger piece of the microswitch 2, so that the microswitch 2 cuts off the control circuit of an ascending electric loop to realize the primary protection of the ascending and the overtravel of the lifting, when the primary protection cannot be achieved, the lifting hook continues to move upwards, the main connecting rod 6 continuously moves downwards, in the process that the main connecting rod 6 moves downwards, the transverse shifting piece 93 triggers a control switch of the circuit breaker 3, the circuit breaker 3 cuts off a power supply, and the second-stage protection of lifting and over-travel is realized.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.

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

Claims (5)

1. The utility model provides a hoist lifting hook stop device that rises, is including playing to rise control box (1), its characterized in that: play to rise the inner chamber middle part fixed mounting of control box (1) has angle piece (5), the top that the inner chamber that plays to rise control box (1) is located angle piece (5) is fixed mounting respectively have micro-gap switch (2) and circuit breaker (3), micro-gap switch (2) are located and play to rise the inner chamber rear side wall of control box (1), circuit breaker (3) are located the inner chamber left side wall that plays to rise control box (1), the inner chamber that plays to rise control box (1) is equipped with main connecting rod (6) that run through angle piece (5), the top of main connecting rod (6) is equipped with control mechanism (9), and the bottom of main connecting rod (6) runs through to rise control box (1) and is equipped with trigger mechanism (7).

2. A crane hook lifting stop according to claim 1, characterised in that: control mechanism (9) are including fixed block (91), slope limit (92) and horizontal plectrum (93), top fixed connection that fixed block (91) are located angle piece (5) is at the lateral wall of main connecting rod (6), slope limit (92) integrated into one piece in the bottom of fixed block (91), lateral plectrum (93) fixed connection is at the lateral wall of circuit breaker (3) top fixed block (91).

3. A crane hook lifting stop according to claim 1, characterised in that: trigger mechanism (7) are including last spacing baffle (71), connecting plate (72), reset plate (73), reset frame (74) and reset spring (75), it is articulated mutually with main connecting rod (6) through connecting plate (72) to go up spacing baffle (71), be equipped with coupling assembling (8) between connecting plate (72) and the play to rise control box (1), reset plate (73) fixed mounting is at the lateral wall of main connecting rod (6), reset plate (73) are located the inner chamber of reset frame (74), fixed mounting has reset spring (75) between reset plate (73) and reset frame (74).

4. A crane hook lifting stop according to claim 3, wherein: coupling assembling (8) include first connecting block (81) and second connecting block (82), first connecting block (81) fixed connection is at the lateral wall of connecting plate (72), second connecting block (82) fixed connection is at the left side lower surface that plays to rise control box (1), it is articulated each other between first connecting block (81) and second connecting block (82).

5. A crane hook lifting stop according to claim 1, characterised in that: the outer side wall of the main connecting rod (6) below the corner piece (5) is fixedly provided with a mounting block (10), and the side wall of the mounting block (10) is fixedly provided with a guide rod (11) penetrating through the corner piece (5).

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