A kind of for the drilling rod on the roof-bolter
Technical field
The utility model relates to a kind of for the drilling rod on the roof-bolter.
Background technology
The exploitation colliery all needs to use roof-bolter, in the prior art because the frequent bore operation of drilling rod on the roof-bolter causes often damaged or fracture of rod member, need to change and maintenance, thereby bring very burden to the operative employee, when the drill bit damage of drilling rod need be changed whole drilling rod, therefore waste material causes the increase of cost.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of simple in structure, and the low and easy accessibility of cost is located accurate drilling rod.
The utility model is achieved through the following technical solutions:
A kind of for the drilling rod on the roof-bolter, comprise drilling rod, and the connecting rod that is connected with drilling rod, and the drill bit that is connected with connecting rod, described drilling rod one end is provided with groove, and described groove is symmetrical arranged with the drilling rod axle center, one end of described connecting rod is provided with the projection with groove fit, the described connecting rod other end is provided with external screw thread, is provided with blind hole in the described drill bit, and described blind hole inwall is provided with the internal thread that cooperates with external screw thread.
As optimized technical scheme, the described drilling rod other end is provided with the hole that is connected with motor output end.
As optimized technical scheme, described drill pipe diameter is greater than the connecting rod diameter, and described bit diameter is greater than the diameter of drilling rod.
As optimized technical scheme, the tapered shape of described drill bit head.
The beneficial effect that the utility model is used for the drilling rod on the roof-bolter is: by set groove and the projection of groove fit, thereby quick and easy for installation, and the location is accurately, by screw thread set on connecting rod, make drill bit and connecting rod conveniently be connected, it is simple in structure, the efficient height, cost is low.
Description of drawings
In order to be easy to explanation, the utility model is done to describe in detail by following specific embodiment and accompanying drawing.
Fig. 1 is a kind of structural representation for the drilling rod on the roof-bolter of the present utility model;
Fig. 2 is a kind of full sectional view for the drilling rod drill bit on the roof-bolter of the present utility model.
The specific embodiment
As depicted in figs. 1 and 2, of the present utility model a kind of for the drilling rod on the roof-bolter, comprise drilling rod 1, and the connecting rod 2 that is connected with drilling rod 1, and the drill bit 3 that is connected with connecting rod 2, described drilling rod 1 one ends are provided with groove 4, described groove 4 is symmetrical arranged with drilling rod 1 axle center, and an end of described connecting rod 2 is provided with the projection 5 that cooperates with groove 4, and described connecting rod 2 other ends are provided with external screw thread 6, be provided with blind hole 8 in the described drill bit 3, described blind hole 8 inwalls are provided with the internal thread 7 that cooperates with external screw thread 6.
Wherein, described drilling rod 1 other end is provided with the hole 9 that is connected with motor output end.
Described drilling rod 1 diameter is greater than connecting rod 2 diameters, and described drill bit 3 diameters are greater than the diameter of drilling rod 1.
The tapered shape of described drill bit 3 heads.
The beneficial effect that the utility model is used for the drilling rod on the roof-bolter is: by set groove and the projection of groove fit, thereby quick and easy for installation, and the location is accurately, by screw thread set on connecting rod, make drill bit and connecting rod conveniently be connected, it is simple in structure, the efficient height, cost is low.
The above only is the specific embodiment of the present utility model, but protection domain of the present utility model is not limited thereto, and any variation or replacement of expecting without creative work all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claims were limited.