Device for supplying rinsing medium in a hammer drill

Abstract

A device for supplying a rinsing medium to a tool of a hammer drill and a hammer drill. The device includes at least one of a rotatable and axially displaceable drilling tool holder having at least one supply channel for the rinsing medium, a transfer part interacting with the drilling tool holder, a housing, a feeder structured and shaped essentially in an axially symmetrical manner, and a holding part with a rinsing medium inlet. The feeder and the holding part are arranged as a connected component, and friction bearings are arranged on both sides of the feeder and arranged toward the drilling tool holder. The holding part is structured to be radially displaceable within limits via bending with respect to at least one of the housing and a fixing ring connected to the housing, but positively fixed tangentially.

Claims

1. A device for supplying a rinsing medium to a tool of a hammer drill, comprising: at least one of a rotatable and axially displaceable drilling tool holder having a tool seat and at least one supply channel for the rinsing medium; a transfer part coupled to drive the drilling tool holder; a housing surrounding at least part of the drilling tool holder and part of the transfer part; a feeder, surrounding the drilling tool holder, that is structured and shaped essentially in an axially symmetrical manner and in fluid communication with the at least one supply channel to supply the rinsing medium to the tool seat through the drilling tool holder; a holding part, surrounding the feeder, with a rinsing medium inlet; the feeder and the holding part being arranged as a connected component; and friction bearings being arranged on both axial sides of the feeder and arranged toward the drilling tool holder, wherein the holding part is structured to be radially displaceable within limits via bending with respect to at least one of the housing and a fixing ring connected to the housing, but rotationally fixed.

2. The device according to claim 1, wherein the hammer drill is a taphole power drill.

3. The device according to claim 1, wherein the feeder and the holding part form a permanently connected component.

4. The device according to claim 1, wherein the friction bearings comprise guide belts and seals.

5. The device according to claim 4, wherein at least one belt and at least one seal are located on each side of the feeder.

6. The device according to claim 1, wherein the feeder is structured with an axial extent that corresponds to an axial extent of movement for the drilling tool holder.

7. The device according to claim 6, wherein the drilling tool holder comprises a tool receiving region.

8. The device according to claim 7, wherein a feed channel is arranged to communicate the rinsing fluid from the feeder to the tool receiving region.

9. The device according to claim 1, wherein the feeder is radially displaceable with the holding part.

10. The device according to claim 9, further comprising a bearing bushing axially adjacent the feeder.

11. The device according to claim 10, further comprising a spacer element axially adjacent the bearing bushing.

12. The device according to claim 11, wherein the spacer element is arranged to surround at least a portion of the feeder.

13. The device according to claim 1, wherein the fixing ring is releasable from the housing to facilitate removal of the holding part and the feeder.

14. The device according to claim 13, wherein the friction bearings are removable with the feeder.

15. A hammer drill comprising: at least one of a rotatable and axially displaceable drilling tool holder having a tool receiving channel; a transfer part structured and arranged to at least one of rotate and axially displace the drilling tool holder; a feeder, having a feeder channel, surrounding the drilling tool holder and having an axial extent that corresponds to an axial displacement distance of the drilling tool holder; and a rinsing fluid channel formed in the drilling tool holder to convey rinsing fluid from the feeder to the tool receiving channel.

16. The hammer drill according to claim 15, further comprising friction bearings axially spaced to be arranged on opposite sides of the feeder channel to contact the drilling tool holder.

17. The hammer drill according to claim 15, further comprising a holding part having a rinsing medium inlet, and the holding part being arranged to surround the feeder and being structured to be radially adjustable.

18. A device for supplying a rinsing medium to a tool of a hammer drill, comprising: at least one of a rotatable and axially displaceable drilling tool holder having a tool seat and at least one supply channel for the rinsing medium; a transfer part coupled to a distal portion of the drilling tool holder; a housing surrounding the distal portion of the drilling tool holder; a feeder, surrounding the drilling tool holder, that is structured and shaped essentially in an axially symmetrical manner and in fluid communication with the at least one supply channel to supply the rinsing medium to the tool seat through the drilling tool holder; and a holding part, surrounding the drilling tool holder, with a rinsing medium inlet; the feeder and the holding part being arranged as a connected component; friction bearings being arranged on both axial sides of the feeder and arranged toward the drilling tool holder, wherein the holding part is structured to be radially displaceable with respect to at least one of the housing and a fixing ring connected to the housing, but rotationally fixed.

19. The device according to claim 1, wherein the at least one supply channel obliquely extends from a region of the tool seat to an exterior surface of the drilling tool holder.

20. The device according to claim 18, wherein the at least one supply channel obliquely extends from a region of the tool seat to an exterior surface of the drilling tool holder.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The present invention is further described in the detailed description which follows, in reference to the noted drawing by way of a non-limiting example of an exemplary embodiment of the present invention, wherein:

(2) The FIGURE illustrates an embodiment of a device for supplying for a rinsing medium to a hammer drill.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(3) The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show structural details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the present invention may be embodied in practice.

(4) FIG. 1 shows in section a device according to the invention. Above the centerline, a drilling tool holder 1 of, e.g., a tool of a hammer drill, and in particular a tool of a taphole power drill on a metallurgical vessel or at a blast furnace, is shown in an extended position and below the centerline is shown in a retracted position.

(5) Drilling tool holder 1 has a receiving region for a tool with a rinsing channel in a distal projecting region. A cavity is centrally located in a base region of a tool seat of drill tool holder 1, which forms a feed channel 11 for a rinsing medium by an oblique bore outwards.

(6) Drilling tool holder 1 is intermittently and optionally rotationally driven by a transfer part 2 into the extended and the retracted position, based on the work, with respect to a housing 3.

(7) In order to ensure an uninterrupted supply of a rinsing agent to the tool, a feeder 4 has an axially symmetrical radial recess with a length which corresponds at least to a distance between the extended and retracted position of drilling tool holder 1.

(8) Feeder 4 is firmly connected with a holding part 5 to form a component 4, 5, in which there is arranged a rinsing medium inlet 51 in holding part 5 with a connection to the radial recess in feeder 4.

(9) Friction bearings or guide belts 41, 41 directed distally inwards to the axis and seals 42, 42 arranged towards drilling tool holder 1 are arranged on both sides of the radial recess in feeder 4.

(10) A component composed of feeder 4 and holding part 5 bears against the outer surface of drilling tool holder 1 via bearings 41, 41 and seals 42, 42 on the one hand and the other hand is loosely guided by holding part 5 from housing 3 with fixing ring 31.

(11) A loose guidance is carried out such that component 4, 5 is displaceable in the radial direction, but tangentially a flat or the like stop prevents a rotation of the component, so that feeder 4, as it were floating on drilling tool holder 1, follows the radial displacement thereof.

(12) According to embodiments, bearing bushing 6 in housing 3 for drilling tool holder 1 can be fixed by axially adjacent spacer element 61 and feeder 4 for a rinsing medium, as illustrated in the FIGURE. After a release of a fixing ring 31 in a simple manner during a repair of the hammer drill and after removal of drilling tool holder 1, feeder 4 and bearing bushing 6 with spacer element 61 can be drawn off and serviced parts can be inserted into housing 3 again.

(13) It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present invention. While the present invention has been described with reference to an exemplary embodiment, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation. Changes may be made, within the purview of the appended claims, as presently stated and as amended, without departing from the scope and spirit of the present invention in its aspects. Although the present invention has been described herein with reference to particular means, materials and embodiments, the present invention is not intended to be limited to the particulars disclosed herein; rather, the present invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims.

LIST OF REFERENCE NUMERALS

(14) 1 Drilling tool holder 11 Supply channel for rinsing medium 2 Transfer part 3 Housing 31 Fixing ring 4 Feed means 41, 41 Friction bearing 42, 42 Seal 5 Holding part 51 Rinsing medium inlet 6 Bearing bushing 61 Spacer element