The chain extracting tool
Technical field
The utility model relates to a kind of chain extracting tool.
Background technology
The chain transmission is to connect main, passive chain gear transmission with chain, flexible element in the middle of the chain row culture.The chain transmission has many good qualities: can keep average ratios accurately; Compact conformation, can be at higher temperature, have under the severe environmental conditions such as greasy dirt and work.The chain transmission is used widely aborning.When the driving-chain wearing and tearing, need the brachymemma chain; Chain wear is serious, in the time of need more renewing chain.All need chain is split, commonly used is the chain punching pin.Usually cutter chain bar method is, chain is placed on the bench vice, aims at the chain straight pin with punching pin, impacts punching pin with hammer, and straight pin is separated with chain, intercepting suitable chain joint number, and the straight pin of packing into then, and riveting jail, straight pin two ends.This shortcoming towards chain is: punching pin (on straight pin) on a less and smooth plane is difficult to aim at, and can be moved, and hammer is also easily hindered hand in the process of dashing.
The utility model content
The utility model provides a kind of handling safety, chain extracting tool easily.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: the chain extracting tool, comprise dashing the body frame and being located in mandrel in the body frame of tubular, the mandrel front end is provided with drift, in the body frame, be provided with ring-shaped step, be positioned on the mandrel of body frame and be equipped with spring, the spring front end is corresponding with the step position in the body frame, and the raised position that is provided with on spring rear end and the mandrel is corresponding.
Described be divided into towards the body frame before, during and after three parts and being spirally connected successively form, all reserve the mandrel hole towards body frame front/rear end; The projection that is provided with on the mandrel is an annular protrusion, and the diameter in the mandrel hole of reserving on the body frame rear end face is greater than the diameter of mandrel and less than the diameter of bossing on the mandrel.
The rear end of described mandrel is provided with base.
When the utility model uses the head of chain extracting tool is aimed at chain hinge pin, the center line that makes the mandrel of chain extracting tool and chain hinge pin is roughly on same straight line, be easy to aim at chain hinge pin at the intercepting chain-type like this, phenomenon can not be moved, during intercepting, chain is placed on the parallels, the hole of the different-diameter and the degree of depth is arranged above the parallels, utilize this instrument to block driving chain rapidly, improved efficiency.
Technical difficulty when the utility model has reduced maintenance has reduced labour intensity, has improved efficiency; Improved the security when operating personnel keep in repair; And it is simple to operate.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of parallels.
The specific embodiment
Embodiment: as shown in Figure 1, the chain extracting tool, comprise dashing body frame 3 and being located in mandrel 4 in the body frame of tubular, mandrel 4 front ends are provided with drift 5, in body frame 3, be provided with ring-shaped step 6, be positioned on the mandrel 4 of body frame 3 and be equipped with spring 2, spring 2 front ends are corresponding with step 6 positions in body frame 3, and the raised position of setting is corresponding on spring 2 rear ends and the mandrel 4.Three parts and being spirally connected successively form before, during and after being divided into towards body frame 3, all reserve the mandrel hole towards body frame 3 front/rear ends; The projection that is provided with on the mandrel 4 is an annular protrusion 12, and the diameter in the mandrel hole of reserving on body frame 3 rear end faces is greater than the diameter of mandrel 4 and less than the diameter of protruding 12 parts on the mandrel.The rear end of mandrel 4 is provided with base 11.
During concrete enforcement, mandrel adopts the 70# Fine Steel Casting iron, and specially treateds such as process forges, quenching, make it have higher hardness, good toughness, not crooked during use, intensity is higher after Quenching Treatment, can bear repeatedly impacting of hand hammer, and spring is selected compression mean diameter of coil D=10mm for use, during spring length L=55mm, can eject smoothly towards core, At time of eject is steady, and the time spent does not rely on the elastic force of spring to make the mandrel withdrawal in body, the hammering mandrel makes every effort to overcome the clothes spring resistance during use, mandrel travels forward, and impacts chain hinge pin, thereby blocks chain.
Fig. 2 is a parallels 7, the hole 8,9,10 of boring different size respectively according to chain hinge pin diameter and length on the parallels 7, and hole 8 diameters are that 5.2mm, the degree of depth are 25mm, hole 9 diameters are that 6.5mm, the degree of depth are 30mm; Hole 10 diameters are that 5.2mm, the degree of depth are 35mm.
The shortcoming of tearing the cutter chain bar open at present utilization punching pin, designed novel chain extracting tool, during use the head of chain extracting tool is aimed at chain hinge pin, head has cylindrical hole, chain hinge pin just inserts in the cylindrical hole of head, the center line that makes the mandrel of chain extracting tool and chain hinge pin is roughly on same straight line, be easy to aim at chain hinge pin at the intercepting chain-type like this, phenomenon can not be moved, during intercepting, chain is placed on the parallels, the hole of the different-diameter and the degree of depth is arranged above the parallels, utilize this instrument to block driving chain rapidly, improved efficiency.