Drilling machine shaft with inlet end discard part

Abstract

A drilling machine shaft with a water inlet discard component includes: a shaft unit comprising a shaft with a central water channel extending through its axis, and an internally threaded section at the front end of the shaft connecting to the central water channel; and a water inlet discard component comprising a body, a central water channel, an externally threaded shaft, and a seal; wherein the body is an axially extending solid structure, a recessed drive hole at the front end of the body, and the externally threaded shaft extending axially at the rear end of the body, and the central water channel passing through the body and the externally threaded shaft; the water inlet discard component is locked to the internally threaded section at the front end of the shaft by the externally threaded shaft, thereby connecting the central water channel with the central water channel; a transition portion is provided on the outside of the body, and the transition portion engages with the seal; thereby, when either the seal or the body is worn, the entire water inlet discard component can be replaced.

Claims

1. A drilling machine shaft with an inlet end discarding component, comprising: A rotating shaft unit includes a rotating shaft driven to rotate by a drive unit; the rotating shaft has a central water channel extending through its axis, and the front end of the rotating shaft has an internal threaded section connecting to the central water channel; and an inlet end discarding component includes a body, a central water channel, an external threaded shaft, and a seal; wherein the body is an axially extending structure, the rear end of the body has an axially extending external threaded shaft, and the central water channel passes through the body and the external threaded shaft; the inlet end discarding component is locked to the internal threaded section of the rotating shaft by the external threaded shaft, so that the central water channel is connected to the central water channel; the body has a transition portion on its exterior, and the transition portion engages with the seal; thereby, when either the seal or the body is worn, the entire inlet end discarding component can be replaced.

2. The drilling machine shaft with an inlet end discarding component as described in claim 1, wherein, The front and middle sections of the shaft are respectively fitted with at least one front bearing and one middle bearing.

3. A drilling machine shaft with an inlet end discarding component as described in claim 2, wherein, The shaft is equipped with a driven gear, which meshes with a transmission shaft of the drive unit; the driven gear is located between the front bearing and the middle bearing.

4. A drilling machine shaft with an inlet end discarding component as described in claim 1, wherein, The front end of the body has a recessed drive hole.

5. A drilling machine shaft with an inlet end discarding component as described in claim 4, wherein, The inner wall profile of the drive hole is polygonal.

6. A drilling machine shaft with an inlet end discarding component as described in claim 1, wherein, The outer diameter of the transition section is different from the diameter of the external threaded shaft.

7. A drilling machine shaft with an inlet end discarding component as described in claim 1, wherein, The outer diameter of the transition section is equal to the diameter of the external threaded shaft.

8. The drilling machine shaft with a water inlet end discarding component as described in claim 1, further comprising a base housing fixed to the end of a housing of the drive unit, the water inlet end discarding component being constrained and positioned inside the base housing; the base housing having a radially provided water injection hole correspondingly communicating with the central water channel of the water inlet end discarding component; the water injection hole being used to guide cooling water into the central water channel and the shaft water channel.

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