CN2111818U

CN2111818U - Taking-out apparatus for broken bolt

Info

Publication number: CN2111818U
Application number: CN 92201909
Authority: CN
Inventors: 苏博兴
Original assignee: Heilongjiang Agricultural Machinery Engineering Research Institute
Current assignee: Heilongjiang Agricultural Machinery Engineering Research Institute
Priority date: 1992-01-29
Filing date: 1992-01-29
Publication date: 1992-08-05

Abstract

The utility model relates to a taking-out apparatus for broken bolts, which belongs to special tools for taking out bolts broken in thread holes of the industry of machine manufacture and maintenance. The taking-out apparatus is composed of a screw tap body, a connecting cylinder and a driving square handle. The screw tap body is the main working part of the taking-out apparatus and adopts a thread teeth structure with left-hand turning direction, short size, high intensity and a shallow chip pocket. The utility model has the characteristics of simple structure, convenient use, low cost and high reliability. The utility model can screw out the broken bolts with various specifications and sizes from the thread holes without damaging original thread holes.

Description

Taking-out apparatus for broken bolt

The utility model belongs in machine-building and the maintenance industry and to take out the specific purpose tool that splits off bolt in screwed hole.

Disconnected the staying in the screwed hole of bolt is very common and common faults in the mechanical industry, for taking-up splits off bolt, the destructive way of many in the past employings, promptly the bolt that will split off in screwed hole with drill bit is drilled to powder, removing, then the original thread hole is become the new screw thread of amplifying specification and use, the disadvantage of this way is to have destroyed the primary standard design, so that influenced mechanical performance, do not allow to change mechanically intrinsic at some, taking-up is split off bolt brought difficulty.At present, also there is employing to bore an aperture in the section center that splits off bolt, in aperture, squeeze into an instrument that has rib body section shape then, utilize the rib body and split off the interference fit of bolt section center aperture and two counterparts between force the axial groove that forms frictional force, move the left-handed rotation of rib body instrument, will split off bolt and from screwed hole, screw out.In actual mechanical process, hammer force during driver size is wayward and grasp: light interference fit deficiency then, and the groove of generation is shallow, and frictional force is little, and easily slippage does not reach and takes out the purpose that splits off bolt; Heavy then damaged the screw thread of screwed hole, destroyed former design standard, cause the damage of parts when serious.If adopt in the way that splits off welded nut on the section of bolt or screw rod, the technical requirement the when complexity of its process and operation is also just higher.

The purpose of this utility model just provides a kind of bolt extractor that splits off, utilize the mandatory screw-in of ridge of the tap shank of this device left hand direction to split off in the suitable hole of size that the bolt section part gets out, rely on ridge to screw back and the relative fastening relation that splits off bolt, continue left-handed, after overcoming the static torsional forces that splits off bolt and screwed hole, will split off bolt and from screwed hole, reliably, successfully take out.

Basic design of the present utility model is, an end that splits off the bolt extractor is short structure, the tap main body of left hand direction, the other end is driving side's handle, the centre connects to form by connecting Cylinder, its tap main body is to be cone and Cylinder two by the integral body that is threaded tooth partly to slip over to cross and constitute in gardens, the axial length of tap main body is 0.8～1.5 times of Cylinder place ridge outside dimension, the ridge capacity chip slot depth is of a size of in 2.5 times of the high size of this screw thread sound of baby talk, the cutting basil is less than or equal to 0 °, connects the size of the outside dimension of Cylinder more than or equal to tap main body Cylinder place ridge external diameter.

The utility model is adapted to various conditions; specification splits off the taking-up of bolt; and in use; since only rely on left-handed to tap main body ridge excision split off the metal of bolt on a small quantity; tap main body ridge is embedded to split off in the bolt; no longer include until between the two and to relatively rotate; continue you take out the bolt that splits off from screwed hole; so; this utensil has simple in structure; reliable operation; easy to use; characteristics with low cost; simultaneously; do not destroy the standard design in former mechanical whorl hole, protection the intact of screwed hole is the most outstanding advantage of the utility model.

Fig. 1 splits off bolt extractor structural representation;

Fig. 2 is the A-A profile of Fig. 1.

Below in conjunction with accompanying drawing the utility model optimum implementation is described in detail.Splitting off the bolt extractor partly is made up of tap main body 1, connection Cylinder 2 and the side's of driving handle 3 three, the ridge hand of spiral of tap main body 1 be left-handed to, and the front end of tap main body 1 partly integral body is the cone shape, rear end partly integral body is the Cylinder shape, the garden slips over and crosses between two parts, tap main body 1 is of a size of 0.8～1.5 times of Cylinder shape part ridge outside dimension along the axis direction entire length, the capacity chip slot depth of left hand thread tooth is in 2.5 times of the high size of this screw thread sound of baby talk, cutting basil α≤0 °.The outside dimension that connects Cylinder 2 is more than or equal to tap main body 1 Cylinder shape ridge outside dimension partly.

Claims

1, a kind of be used for taking out splitting off split off the bolt extractor at the screwed hole bolt, this device is by tap main body 1, connect Cylinder 2 and driving side's handle 3 compositions, the ridge hand of spiral that it is characterized in that tap main body 1 be left-handed to, and the front end of tap main body 1 partly integral body is the cone shape, rear end partly integral body is the Cylinder shape, the garden slips over and crosses between two parts, tap main body 1 is of a size of 0.8～1.5 times of Cylinder shape part ridge outside dimension along the axis direction entire length, left-handed capacity chip slot depth to ridge is in 2.5 times of the high size of this screw thread sound of baby talk, smear metal basil α≤0 °.

2, the bolt extractor that splits off according to claim 1 is characterized in that connecting the outside dimension of Cylinder 2 more than or equal to tap main body 1 Cylinder shape ridge outside dimension partly.