CN202116227U

CN202116227U - Luffing drum stop device

Info

Publication number: CN202116227U
Application number: CN2011202299880U
Authority: CN
Inventors: 郝建光; 申昌宏; 丁兆义
Original assignee: Taiyuan Heavy Industry Co Ltd
Current assignee: Taiyuan Heavy Industry Co Ltd
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2012-01-18
Anticipated expiration: 2021-06-28

Abstract

A luffing drum stop device relates to a luffing mechanism of a jib crane and solves the problem that a conventional drum stop system in a luffing mechanism of a jib crane is poor in safety and low in efficiency. The luffing drum stop device is characterized in that a pawl consists of a pawl head, a pawl tail and a pawl shank, the middle of the pawl is hinged in the middle of a support through a shaft, the pawl tail is connected with one end of a spring, the other end of the spring is connected with a hook, the hook is fixed on the support through double nuts, the pawl shank is hinged with a piston rod of a cylinder through a pin, and the cylinder is mounted on the support through a trunnion of the cylinder. The luffing drum stop device is applicable to different types of jib cranes and has the advantages of simple structure, convenience in operation, safety and reliability.

Description

A kind of amplitude-changing drum stop motion mechanism

Technical field

The utility model belongs to handling machinery, specially refers to the reel stop motion mechanism that uses in the arm derrick crane luffing mechanism.

Background technology

The arm derrick crane luffing mechanism is that the weight through jib deadweight and lift heavy realizes descending.Runabout crane particularly, the space is limited, all adopts built-in actuating device, plate disc brake, planetary reduction gear version.Owing to adopt engine drive, therefore must in drive system, add automatic speed limit device, in the time of can not working by damped condition to satisfy driving engine, eliminate the unreliable factor that jib descends.Because adopt planetary structure, the safety factor of drg is also not too large, also can't realize the redundancy of drg, the hoisting crane high to security requirement, reliability is affected.If direct motor drive, adopt the turbine and worm retarder of self-locking can improve safety, but that shortcoming is an efficient is low.If adopt conventional gear reducer also to have the problem of poor stability.

Summary of the invention

The purpose of the utility model is to overcome the shortcoming of prior art, and a kind of amplitude-changing drum stop motion mechanism is provided, and solves in the arm derrick crane luffing mechanism conventional reel stop system poor stability, inefficient problem.

The utility model is realized its goal of the invention through following technical scheme.

A kind of amplitude-changing drum stop motion mechanism is made up of roll device and stop motion mechanism two parts, has the reel of ratchet in the said roll device; Be installed on the supporting base; Drive reel by driver train and rotate, the ratchet of said stop motion mechanism and ratchet engaged is characterized in that: said ratchet is made up of ratchet head, ratchet afterbody, pawl bar portion; The middle part of said ratchet is hinged on the centre of support through axle; Said ratchet afterbody is connected with an end of spring, and the other end of said spring is connected with hook, and said hook is fixed on the support through double nuts; The piston rod of said pawl bar portion and oil cylinder is hinged through bearing pin, and said oil cylinder is installed on the said support through its gudgeon.

Be provided with self lubrication bearing between said ratchet and the said axle; Said axle is fixed on the said support by the axle head baffle plate; Said gudgeon is fixed through axle sleeve, half snap ring and baffle plate and said support.

The utility model as long as framing member has enough intensity, just can be realized stop owing to adopt the version of click to realize stop.Because the utility model is positioned at the end of luffing mechanism messenger chain, can directly realize the stop of reel, the hidden danger that causes in the time of can overcoming other element fault of messenger chain can satisfy the safe and reliable operating needs of arm derrick crane luffing mechanism.The utility model can be used for multi-form arm derrick crane, and has advantage simple in structure, easy to operate, safe and reliable.

Description of drawings

Fig. 1 is the structural representation (front view) of the utility model;

Fig. 2 is the A-A section-drawing of Fig. 1;

Fig. 3 is that the D of Fig. 2 is to view;

Fig. 4 is the B-B section-drawing of Fig. 3;

Fig. 5 is the C-C section-drawing of Fig. 4.

The utility model is further described through preferred embodiment below in conjunction with accompanying drawing.

The specific embodiment

Like Fig. 1,2,3,4, shown in 5, a kind of amplitude-changing drum stop motion mechanism is made up of roll device and stop motion mechanism two parts; The reel 1 that has ratchet 1-1 in the said roll device is installed on the supporting base 2, drives reel by driver train 3 and rotates; The ratchet 4 of said stop motion mechanism and ratchet 1-1 engagement, said ratchet 4 is made up of ratchet head 4-1, ratchet afterbody 4-2, the 4-3 of pawl bar portion, and the middle part of said ratchet 4 is hinged on the centre of support 7 through axle 11; Said ratchet afterbody 4-2 is connected with an end of spring 12; The other end of said spring 12 is connected with hook 13, and said hook 13 is fixed on the support 7 through double nuts 14, and with spring 12 tensions; Guarantee that ratchet 4 and ratchet 1-1 combine closely; Prevent the reel reversing, the piston rod of said pawl bar 4-3 of portion and oil cylinder 6 is hinged through bearing pin 16, and said oil cylinder 6 is installed on the said support 7 through its gudgeon 6-1.

Be provided with self lubrication bearing 10 between said ratchet 4 and the said axle 11; Said axle 11 is fixed on the said support 7 by axle head baffle plate 15; Said gudgeon 6-1 fixes through axle sleeve 8, half snap ring 5 and baffle plate 9 and said support 7.

Principle of work of the utility model and working process:

Fixed pulley group on the arm derrick crane vehicle frame and the running block on the jib, being involved in and discharging, the luffing motion of realization jib through steel rope on the reel.Ratchet 4 is through the action of oil cylinder 6, realize with the combination of ratchet 1-1 with separate, realize the stop of reel making jib rest on the relevant position through the combination of click, avoid occurring jib and glide or other safety hazard.

When reel 1 together with ratchet 1-1 left-hand revolution; The ratchet 1-1 that contacts with ratchet 4 gives 4 one clws rotational forcees of ratchet, and spring 12 is stretched, and the convergent force of spring 12 forces ratchet 4 left-hand revolutions; Like this; Ratchet 4 can automatically reset through spring 12, all the time with ratchet 1-1 engagement, stops reel 1 reversing.When ratchet 4 need withdraw from ratchet 1-1; Control desk provides instruction, and the piston rod of oil cylinder 6 is released, and makes ratchet 4 clickwises (at this moment; The thrust of piston rod should be greater than the convergent force of spring 12); Ratchet 4 is thrown off with ratchet 1-1, and driver train 3 can drive reel 1 and rotate, and realizes the lifting and the decline of crane arm support.The state of oil cylinder 6 can detect through pressure sensor.

Claims

1. amplitude-changing drum stop motion mechanism; Form by roll device and stop motion mechanism two parts; The reel (1) that has ratchet (1-1) in the said roll device is installed on the supporting base (2), drives reel (1) by driver train (3) and rotates; Ratchet of said stop motion mechanism (4) and ratchet (1-1) engagement; It is characterized in that: said ratchet (4) is made up of ratchet head (4-1), ratchet afterbody (4-2), pawl bar portion (4-3), and the middle part of said ratchet (4) is hinged on the centre of support (7) through spool (11), and said ratchet afterbody (4-2) is connected with an end of spring (12); The other end of said spring (12) is connected with hook (13); Said hook (13) is fixed on the said support (7) through double nuts (14), and said pawl bar portion (4-3) is hinged through bearing pin (16) with the piston rod of oil cylinder (6), and said oil cylinder (6) is installed on the said support (7) through its gudgeon (6-1).

2. according to the described amplitude-changing drum stop motion mechanism of claim 1, it is characterized in that: be provided with self lubrication bearing (10) between said ratchet (4) and the said axle (11).

3. according to the described amplitude-changing drum stop motion mechanism of claim 1, it is characterized in that: said axle (11) is fixed on the said support (7) by axle head baffle plate (15).

4. according to the described amplitude-changing drum stop motion mechanism of claim 1, it is characterized in that: said gudgeon (6-1) is fixing through axle sleeve (8), half snap ring (5) and baffle plate (9) and said support (7).