AU2014100843A4

AU2014100843A4 - Mining Tool Seat Assembly with Double Cavities

Info

Publication number: AU2014100843A4
Application number: AU2014100843A
Authority: AU
Inventors: Yuhai Liu; Sijun Tian; Guocheng Yan; Xueqiang Zhang
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-07-24
Filing date: 2014-07-24
Publication date: 2014-08-28
Anticipated expiration: 2022-07-24

Abstract

Abstract A mining tool seat assembly with double cavities comprises a tool seat, a connecting seat, a base seat, dust-proof rubber stoppers, a welded panel and bolts; the tool seat is connected to the connecting seat by way of insertion under 5 rail guidance; the connecting seat is connected to the base seat also by way of insertion under rail guidance; a head of the tool seat is provided with a circular pick installation hole or a rectangular tool installation hole; a first oblique cone of the tool seat is provided with an open recess for installing a pick ejection device which is used for ejecting a pick during pick replacement; in general, only the tool seat is 10 required to be replaced; the connecting seat is only required to be replaced when it nearly comes to an end of its service life after repeated replacement of the tool seat; to replace the connecting seat, remove the normal hexagonal bolts and eject the connecting seat from the base seat by using the ejection device; the base seat is the lastly and least frequently replaced part and it is replaced only under special 15 circumstances. The miigtool sea,,t assembly has a scientific anld reason ble structure providing easy operatI.ion and great economic usefulniess. Wearing resistant layer Wading Welding Fig.1 _7 Wearing resistant layer a'-1 Fig.2

Description

1 Mining Tool Seat Assembly with Double Cavities FIELD OF INVENTION The present invention relates to a mining pick seat, and more specifically relates to a novel mining too seat assembly with double cavities. 5 BACKGROUND OF INVENTION Mining pick seat is a mechanical part of a mining machine. In particular, a mining pick seat is a supporting component for a pick which is used for cutting and drilling in mining. Mining pick seat is therefore an important part in a mining machine. A mining pick seat available nowadays is usually formed by assembling 10 two different parts; the pick is installed in a pick installation hole of the seat. This kind of mining pick seat is susceptible to wearing during use due to its exposure to a working surface. Therefore, this kind of mining pick seat requires frequent replacement which involves a high cost and consumes much time, thereby increasing the mining cost. 15 SUMMARY In view of the disadvantages now present in the prior art, the present invention provides a mining tool seat assembly with double cavities. In general, the present invention only requires replacement of the pick seat, thereby lowering the replacement frequency of the connecting seat. Also, replacement of the pick seat 20 according to the present invention is simple and convenient, thereby effectively increasing the performance of the mining pick seat and lowering the mining cost. An object of the present invention is to provide a mining tool seat assembly with double cavities for more convenient replacement of the pick seat during mining so as to reduce the mining cost.

2 The present invention is achieved as follows: A mining tool seat assembly with double cavities mainly comprises a tool seat (1), a connecting seat (2), a base seat (3), dust-proof rubber stoppers (4), a welded panel (5) and bolts (6). The tool seat (1) is installed to the connecting seat (2) by way of insertion 5 under rail guidance to form an assembly A. The assembly A is installed to the base seat (3) by inserting the connecting seat (2) to the base seat (3) under rail guidance to form a double-cavity assembly B. After assembly of the double-cavity assembly B is completed, the double-cavity assembly B is welded onto a milling drum of a mining machine via a curved bottom surface (14). The present invention 10 is characterized in that, the tool seat (1) and the connecting seat (2) are further bolted and connected together by using normal hexagonal bolts (6-1), and the connecting seat (2) and the base seat (3) are also further bolted and connected together by using normal hexagonal bolts (6-2). The welded panel (5) is welded to a third back surface (10-5) of the connecting seat (2). An open recess (8-6) of the 15 tool seat (1) and the welded panel (5) form a semi-opening space. During removal of a pick, a pick ejection device is placed in the semi-opening space, and the welded panel (5) provides backing support for the pick ejection device to eject the pick in order to remove the pick. Counterbores of the bolt positioning holes (5-1) and the second bolt positioning holes (15-1) accommodating the normal 20 hexagonal bolts (6-1) and the normal hexagonal bolts (6-2) are filled with the dust proof rubber stoppers (4) to prevent coal ash and dust from getting inside during mining causing difficulties in disassembly. Replacement of the mining tool seat assembly with double cavities is described as follows: In general, only the tool seat (1) is required to be replaced; to 3 replace the tool seat (1), remove the normal hexagonal bolts (6-1) and eject the tool seat (1) from the connecting seat (2) by using the ejection device; the connecting seat (2) is only required to be replaced when it nearly comes to an end of its service life after repeated replacement of the tool seat (1); to replace the 5 connecting seat (2), remove the normal hexagonal bolts (6-2) and eject the connecting seat (2) from the base seat (3) by using the ejection device; the base seat (3) is the lastly and least frequently replaced part; to replace the base seat (3), directly remove it from the mining machine. The present invention has a scientific and reasonable structure 10 preventing replacement of the entire mining tool seat assembly. The present invention enables fast and simple replacement of the parts of the mining tool seat assembly, thereby reducing the mining cost and increasing the economic usefulness of the present invention. DESCRIPTION OF FIGURES 15 FIG. 1 is a front elevational view of the present invention, in which, reference sign 1 is a tool seat, reference sign 2 is a connecting seat, reference sign 3 is a base seat, reference sign 4 is dust-proof rubber stoppers, reference sign 5 is a welded panel, reference sign 6 is bolts. FIG. 2 is a front elevational view of the tool seat (1), in which, reference 20 sign 7 is a tool seat head, reference sign 8 is a first oblique cone, reference sign 7 1 is a cone surface, reference sign 7-2 is a column surface, reference sign a1 is an included angle. FIG. 3 is a left side view of the tool seat (1), in which, reference sign 8-1 is platform surfaces, reference sign 8-2 is assistant installation surfaces, reference 4 sign 8-3 is taper fitting surfaces, reference sign 8-4 is a bottom surface, reference sign 8-5 is a back surface. FIG. 4 is a perspective view of the tool seat (1), in which, reference sign 8-6 is an open recess, reference sign 9 is bolt tightening holes. 5 FIG. 5 shows a welded panel (5), in which, reference sign 5-1 is bolt positioning holes. FIG. 6 is a front elevational view of the connecting seat (2), in which, reference sign 10 is a first oblique conical cavity, reference sign 11 is a second oblique cone, reference sign 11 -5 is a second back surface. 10 FIG. 7 is a left side view of the connecting seat (2), in which, reference sign a2 is an included angle, reference sign 10-5 is a third back surface. FIG. 8 is a left side view of the connecting seat (2), in which, reference sign P1 is an included angle. FIG. 9 is a sectional view along direction A in FIG. 8, in which, reference 15 sign 10-1 is third platform surfaces, reference sign 10-2 is third assistant installation surfaces, reference sign 10-3 is third taper fitting surfaces, reference sign 10-4 is a third bottom surface, reference sign 11 -1 is second platform surfaces, reference sign 11 -2 is second assistant installation surfaces, reference sign 11 -3 is second taper fitting surfaces, reference sign 11 -4 is a second bottom 20 surface, reference sign 11 -6.is second bolt tightening holes. FIG. 10 is a perspective view of the base seat (3), in which, reference sign 13 is a second oblique conical cavity, reference sign 14 is a curved bottom surface.

5 FIG. 11 is a front elevational view of the base seat (3), in which, reference sign 13-1 is fourth platform surfaces, reference sign 13-2 is fourth assistant installation surfaces, reference sign 13-3 is third taper fitting surfaces, reference sign 13-4 is a fourth bottom surface. 5 FIG. 12 is a left side view of the base seat (3), in which, reference sign P2 is an included angle, reference sign 13-5 is a fourth back surface. FIG. 13 is a front elevational view of the a bolt positioning back panel (15), in which, reference sign 15-1 is second bolt positioning holes. FIG. 14 is a front elevational view of assembly A. 10 FIG. 15 is a front elevational view of a double-cavity assembly B, in which, reference sign 1 is a tool seat, reference sign 2 is a connecting seat, reference sign 3 is a base seat, reference signs 4-1 and 4-2 are dust-proof rubber stoppers, reference sign 5 is a welded panel, reference signs 6-1 and 6-2 are normal hexagonal bolts. 15 FIG. 16 is a front elevational view showing multiple mining tool seat assembly with double cavities according to the present invention welded to a milling drum. EMBODIMENTS A description of the structure of the present invention is detailed below 20 with reference to the accompanying drawings. As shown in FIG. 1, a mining tool seat assembly with double cavities mainly comprises a tool seat (1), a connecting seat (2), a base seat (3), dust-proof rubber stoppers (4), a welded panel (5) and bolts (6). The tool seat (1) is a forged 6 and pressed product or a cast steel product. Quantity of the dust-proof rubber stoppers (4) is four, each having a shape of a cylinder or a hexagonal prism. As shown in FIG. 2, a head of the tool seat mainly comprises a tool seat head (7) and a first oblique cone (8). The tool seat head (7) is provided with a 5 circular pick installation hole or a rectangular tool installation hole for convenient installation of a common pick or other tool. The tool seat head (7) also comprises a cone surface (7-1) and a column surface (7-2). A connecting position between the cone surface (7-1) and the column surface (7-2) is a fillet or a chamfer. The cone surface (7-1) and the column surface (7-2) are provided with a wearing resistant 10 layer, brazing carbide or a cladding wearing resistant layer by surfacing welding to increase wearing resistance of the tool seat (1) and to prolong the service life of the tool seat (1). As shown in FIG. 3, the first oblique cone (8) comprises platform surfaces (8-1), assistant installation surfaces (8-2), taper fitting surfaces (8-3), a bottom surface (8-4) and a back surface (8-5). The platform surfaces (8-1) and the 15 taper fitting surfaces (8-3) form a steady first triangular force bearing surface to increase the stability of the tool seat (1) during mining and to prevent loosening of the tool seat (1). The platform surfaces (8-1) and the bottom surface (8-4) form an included angle a 1 to facilitate disassembly. As shown in FIG. 4, the two bolt tightening holes (9) are provided on the back surface (8-5) of the tool seat (1). One 20 side of a central axis of the first oblique cone (8) is provided with an open recess (8-6). The open recess (8-6) can be in a rectangular or a circular shape. The main purpose of the open recess (8-6) is to provide a space for installing a pick ejection device for removing a pick. As shown in FIG. 5, the welded panel (5) is a thin rectangular panel. Two bolt positioning holes (5-1) adjacent to each other are 7 arranged on the welded panel (5). The bolt positioning holes (5-1) are each formed by a counterbore and a through hole. FIG. 6 shows a front elevational view of the connecting seat (2) positioned between the tool seat (1) and the base seat (3). Reference sign 10 is a 5 first oblique conical cavity. An inner surface of the first oblique conical cavity (10) conforms to an outer shape of the first oblique cone (8) in FIG. 2. Reference sign 11 is a second oblique cone. Reference sign 11-5 is a second back surface of the second oblique cone (11). Reference sign 11-6 is two second bolt tightening holes adjacent to each other. As shown in FIG. 7, second platform surfaces (11 -1) and a 10 second bottom surface (11-4) of the second oblique cone (11) form an included angle a2. As shown in FIG. 8, a lateral central axis of the first oblique conical cavity (10) and a lateral central axis of the second oblique cone (11) form an included angle Pi. Reference sign 10-5 is a third back surface of the first oblique conical cavity (10). The purpose of forming the included angle P1 is to ensure an angle of 15 elevation of an assembly B as shown in FIG. 15 after assembly. As shown in FIG. 9, the first oblique conical cavity (10) comprises third platform surfaces (10-1), third assistant installation surfaces (10-2), third taper fitting surfaces (10-3) and a third bottom surface (10-4). The third platform surfaces (10-1) and the third taper fitting surfaces (10-3) form a steady first triangular supporting surface to provide 20 steady support for installation of the first oblique cone (8) of the tool seat (1) and increase the stability of the connection between the first oblique cone (8) and the first oblique conical cavity (10). The second oblique cone (11) mainly comprises the second platform surfaces (11 -1), second assistant installation surfaces (11-2), second taper fitting surfaces (11-3) and the second bottom surface (11-4). The 8 second platform surfaces (11 -1) and the second taper fitting surface (11-3) form a steady second triangular force bearing surface to increase the stability of the connecting seat (2) during mining and to prevent loosening of the connecting seat (2). The included angle a2 formed by the second platform surfaces (11-1) and the 5 second bottom surface (11-4) facilitates disassembly of the connecting seat (2). Grooves (12) exist symmetrically at a left side and at a right side of a contact portion between the first oblique conical cavity (10) and the second oblique cone (11). The grooves (12) have a trapezoid shape or a rectangular shape. The grooves (12) are provided mainly for locking during assembly of the connecting 10 seat (2) and the base seat (3). Wearing resistant layer is welded to a frontal oblique surface of the first oblique conical cavity (10) and a frontal oblique surface of the second oblique cone (11). As shown in FIG. 10, reference sign 13 is a second oblique conical cavity. An inner surface of the second oblique conical cavity (13) conforms to an 15 outer shape of the second oblique cone (11) of the connecting seat (2). Reference sign 14 is a curved bottom surface. Curvature of the curved bottom surface (14) is determined by an outer diameter of a milling drum used during mining. As shown in FIG. 11, the second oblique conical cavity (13) comprises fourth platform surfaces (13-1), fourth assistant installation surfaces (13-2), fourth taper fitting 20 surfaces (13-3) and a fourth bottom surface (13-4). The fourth platform surfaces (13-1) and the fourth taper fitting surfaces (13-3) form a steady second triangular supporting surface to provide steady support for installation of the second oblique cone (11) of the connecting seat (2) and increase the stability of the connection between the second oblique cone (11) and the second oblique conical cavity (13).

9 As shown in FIG. 12, a lateral central axis of the second oblique conical cavity (13) and a lateral central axis of the curved bottom surface (14) form an included angle P32. As shown in FIG. 13, reference sign 15 is a bolt positioning back panel 5 and is a component independent of the base seat (3). The bolt positioning back panel (15) is provided with two second bolt positioning holes (15-1) adjacent to each other. The second bolt positioning holes (15-1) are each formed by a counterbore and a through hole. An assembling method of the present invention is described below with 10 reference to FIGs. 1-15. As shown in FIG. 14, an assembly A has to be assembled when assembling the present invention. An assembling procedure of the assembly A is described as follows: install the tool seat (1) to the connecting seat (2) by way of insertion under rail guidance; in particular, the first oblique cone (8) of the tool seat 15 (1) is inserted to the first oblique conical cavity (10) under rail guidance to form clearance fit with the connecting seat (2); the angle a1 is provided to enable easy disassembly during insertion of the first oblique cone (8) to the first oblique conical cavity (10); a contact position between the steady first triangular force bearing surface of the first oblique cone (8) and the steady first triangular supporting 20 surface of the first oblique conical cavity (10) form a steady triangular assembly so that the tool seat (1) is installed steadily to prevent lateral loosening with respect to a central axis; the welded panel (5) is welded to the connecting seat (2) as a one whole piece by welding to the third back surface (10-5); after welding of the welded panel (5) is completed, normal hexagonal bolts (6-1) are placed inside the 10 bolt positioning holes (5-1) of the welded panel (5) and fixed into the bolt tightening holes (9) to prevent loosening of the tool seat (1) along a central axis; counterbores of the bolt positioning holes (5-1) are filled with the dust-proof rubber stoppers (4); the dust-proof rubber stoppers (4) are provided to prevent coal ash 5 and dust from getting inside and blocking the holes causing difficulties in disassembly. The assembly of assembly A is completed. After that, the open recess (8-6) of the first oblique cone (8) and the welded panel (5) form a semi opening space for accommodating the pick ejection device which is used for removing a pick. During removal of the pick, the pick ejection device is placed in 10 the semi-opening space, and the welded panel (5) provides backing support for the pick ejection device to eject the pick so that removal of the pick is easier. As shown in FIG. 15, a double-cavity assembly B will be assembled after assembly A is assembled. Assembly A and the base seat (3) form clearance fit by inserting the second oblique cone (11) into the second oblique conical cavity 15 (13) under rail guidance, and then form the double-cavity assembly B by using bolts. The double-cavity assembly B is assembled as follows: insert the second oblique cone (11) into the second oblique conical cavity (13) under rail guidance to form clearance fit with the base seat (3); the angle a2 is provided to enable easy disassembly during insertion of the second oblique cone (11) to the second 20 oblique conical cavity (13); the steady second triangular force bearing surface of the second oblique cone (11) and the steady second triangular supporting surface of the second oblique conical cavity (13) contact with each other and form a steady triangular assembly so that the assembly A is installed steadily to prevent lateral loosening with respect to a central axis; the bolt positioning back panel (15) 11 is welded to the base seat (3) as a one whole piece by welding to a fourth back surface (13-5) of the second oblique conical cavity (13); after welding of the bolt positioning back panel (15) is completed, normal hexagonal bolts (6-2) are placed inside the second bolt positioning holes (15-1) of the bolt positioning back panel 5 (15) and fixed into the second bolt tightening holes (11-6) to prevent loosening of the assembly A along a central axis; counterbores of the second bolt positioning holes (15-1) are filled with the dust-proof rubber stoppers (4); the dust-proof rubber stoppers (4) are provided to prevent coal ash and dust from getting inside and blocking the holes causing difficulties in disassembly. The assembly of the double 10 cavity assembly B is completed. Before assembly, the angles a1, a2, P1 and P2 can be adjusted. Curvature of the curved bottom surface (14) is determined by the outer diameter of the milling drum used during mining. As shown in FIG. 16, the entire double-cavity assembly B is welded onto 15 the milling drum via the curved bottom surface (14) after assembly, and a pick is installed into the tool seat head (7) of the tool seat (1).

Claims

1. A mining tool seat assembly with double cavities, comprising a tool seat (1), a connecting seat (2), a base seat (3), dust-proof rubber stoppers (4), a welded 5 panel (5) and bolts (6), wherein the tool seat (1) is connected to the connecting seat (2) by way of insertion under rail guidance; the connecting seat (2) is connected to the base seat (3) also by way of insertion under rail guidance.

2. The mining tool seat assembly with double cavities as claimed in Claim 1, wherein the tool seat (1) is a forged and pressed product or a cast steel 10 product; the tool seat (1) comprises a tool seat head (7) and a first oblique cone (8); the tool seat head (7) is provided with a circular pick installation hole or a rectangular tool installation hole; the connecting seat (2) comprises a first oblique conical cavity (10) and a second oblique cone (11); the first oblique conical cavity (10); grooves (12) exist sy etica a a kfit side and at a righ 15 side of a contact portion between the first oblique conical cavity (10) and the second oblique cone (11); the grooves (12) have a trapezoid shape or a rectangular shape; the base seat (3) comprises a second oblique conical cavity (13), a curved bottom surface (14) and a bolt positioning back panel (15); qu,,antity of the dust-proof rubbe--r stoppers (,4) is fueach having a shape of a 20 cylinder or a hexagonal prism; bolts (6) comprises first normal hexagonal bolts (6-1) and second normal hexagonal bolts (6-2) of two different specifications; the welded panel (5) is welded to a third back surface (10-5) of the connecting seat (2); two bolt positioning holes (5-1) adjacent to each other are arranged on the welded panel (5) 2

3. The mining tool seat assembly with double cavities as claimed in Claim 1, wherein the first oblique cone (8) of the tool seat (1) is inserted to the first oblique conical cavity (10) under rail guidance to form an assembly A with the connecting seat (2); the second oblique cone (11) of the assembly A is inserted 5 into the second oblique conical cavity (13) under rail guidance to form a double-cavity assembly B with the base seat (3).

4. The mining tool seat assembly with double cavities as claimed in Claim 2, wherein the tool seat head (7) comprises a cone surface (7-1) and a column surface (7-2); the cone surface (7-1) is provided with a wearing resistant layer, 10 brazing carbide or a cladding wearing resistant layer by surfacing welding; the column surface (7-2) is provided with a wearing resistant layer, brazing carbide or a cladding wearing resistant layer by surfacing welding; the first oblique cone (8) comprises multiple surfaces which comprise platform surfaces (8-1), assistant installation surfaces (8-2), taper fitting surfaces (8-3), a bottom 15 surface (8-4) and a back surface (8-5); one side of a central axis of the first oblique cone (8) is provided with an open recess (8-6); the platform surfaces (8-1) and the taper fitting surfaces (8-3) form a steady first triangular force bearing surface; the platform surfaces (8-1) and the bottom surface (8-4) form an included angle a,; two bolt tightening holes (9) are provided on the back 20 surface (8-5); the first oblique conical cavity (10) comprises third platform surfaces (10-1), third assistant installation surfaces (10-2), third taper fitting surfaces (10-3), a third bottom surface (10-4) and the third back surface (10-5); the third platform surfaces (10-1) and the third taper fitting surfaces (10-3) form a steady first triangular supporting surface; the second oblique cone (11) 3 comprises multiple surfaces which comprise second platform surfaces (11-1), second assistant installation surfaces (11 -2), second taper fitting surfaces (11 3), a second bottom surface (11-4) and a second back surface (11-5); the second platform surfaces (11 -1) and the second taper fitting surface (11 -3) form 5 a steady second triangular force bearing surface; the second platform surfaces (11-1) and the second bottom surface (11-4) form an included angle a2; two second bolt tightening holes (11 -6) is arranged on the second back surface (11 5); a lateral central axis of the first oblique conical cavity (10) and a lateral central axis of the second oblique cone (11) form an included angle p1; wearing 10 r t laye is welded to a frontal obliques e of the first oblique conical cavity (1O) and a frontal oblique surface of the second oblique cone (11); the second oblique conical cavity (13) comprises fourth platform surfaces (13-1), fourth assistant installation surfaces (13-2), fourth taper fitting surfaces (13-3) and a fourth bottom surface (13-4); the fourth platform surfaces (13-1) and the 15 fourth taper fitting surfaces (13-3) form a steady second triangular supporting surface; a lateral central axis of the second oblique conical cavity (13) and a lateral central axis of the curved bottom surface (14) form an included angle P2; the bolt positioning back panel (15) is a component independent of the base seat (3); the bolt positioning back panel (15) is provided with two second bolt 20 positioning holes (15-1) adjacent to each other.

5. The mining tool seat assembly with double cavities as claimed in Claim 4, wherein counterbores of the bolt positioning holes (5-1) and the second bolt positioning holes (15-1) of the assembly A and the double-cavity assembly B are filled with the dust-proof rubber stoppers (4); the welded panel (5) of the 4 assembly A is welded to the connecting seat (2) as a one whole piece; the bolt positioning back panel (15) of the double-cavity assembly B is welded to the base seat (3) as a one whole piece; in the double-cavity assembly B, the tool seat forms an angle of elevation with respect to the base seat (3).