CLIAMS:1. A cutting tool mounting assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine and adapted for receiving a cutting tool, the cutting tool mounting assembly comprising:
a base configured for attachment to the surface of the rotatable driving member, the base comprising:
a bottom surface, a top portion, and a front portion that defines a receptacle;
a first inner support surface and a second inner support surface each contained in a plane that is angled relative to the bottom surface; and
a first outer support surface and a second outer support surface each contained in a plane that is parallel to the bottom surface; and
a tool holder configured for attachment to the base, the tool holder comprising:
a block member configured for receipt in the receptacle of the base;
a forward face defining an aperture for receiving the cutting tool;
a first rearward face configured for engaging the first inner support surface of the base and a second rearward face configured for engaging the second inner support surface of the base;
a first shoulder configured for engaging the first outer support surface of the base and a second shoulder configured for engaging the second outer support surface of the base; and
a first top flange and a second top flange configured for engaging the top portion of the base.
2. The cutting tool mounting assembly of claim 1, wherein the plane containing the first outer support surface and the second outer support surface is parallel to a plane containing the top portion of the base.
3. The cutting tool mounting assembly of claim 1, wherein the top portion includes a first top portion spaced apart from a second top portion.
4. The cutting tool mounting assembly of claim 2, wherein the first top flange is configured for engaging the first top portion of the base and the second top flange is configured for engaging the second top portion of the base.
5. The cutting tool mounting assembly of claim 2, wherein the base further includes a first outer support wall extending between the first outer support surface and the first top portion and a second outer support wall extending between the second outer support surface and the second top portion.
6. The cutting tool mounting assembly of claim 5, wherein the tool holder further includes a first outer bearing surface configured for engaging the first outer support wall of the base and a second outer bearing surface configured for engaging the second outer support wall of the base.
7. The cutting tool mounting assembly of claim 5, wherein the first outer support wall of the base and the second outer support wall of the base are each contained in a plane that is perpendicular to the bottom surface of the base.
8. The cutting tool mounting assembly of claim 5, the base further includes a first inner support wall extending between the first inner support surface and the first top portion and a second inner support wall extending between the second inner support surface and the second top portion.
9. The cutting tool mounting assembly of claim 8, wherein the tool holder further includes an inner bearing surface configured for engaging the first inner support wall and the second inner support wall of the base.
10. The cutting tool mounting assembly of claim 9, wherein the first inner support wall of the base and the second inner support wall of the base are each contained in a plane that is perpendicular to the bottom surface of the base.
11. The cutting tool mounting assembly of claim 1, wherein the base further includes an elongated support area extending between the receptacle and both the first inner support surface and the second inner support surface.
12. The cutting tool mounting assembly of claim 11, wherein the tool holder includes an elongated support surface configured for engaging the elongated support area of the base.
13. The cutting tool mounting assembly of claim 1, wherein the first rearward face and the second rearward face of the tool holder are spaced apart by the aperture that extends through the forward face.
14. The cutting tool mounting assembly of claim 13, wherein the base includes a rearward portion that defines a cavity that is in communication with the aperture that extends through the forward face and the first rearward face and the second rearward face of the tool holder.
15. The cutting tool mounting assembly of claim 13, wherein the first rearward face and the second rearward face of the tool holder are contained in a plane that is angled relative to the bottom surface of the base.
16. A cutting tool assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine, the cutting tool assembly comprising:
a base configured for attachment to the surface of the rotatable driving member, the base comprising:
a bottom surface, a top portion, and a front portion that defines a receptacle;
a first inner support surface and a second inner support surface each contained in a plane that is angled relative to the bottom surface; and
a first outer support surface and a second outer support surface each contained in a plane that is parallel to the bottom surface;
a tool holder configured for attachment to the base, the tool holder comprising:
a block member configured for receipt in the receptacle of the base;
a forward face defining an aperture;
a first rearward face configured for engaging the first inner support surface of the base and a second rearward face configured for engaging the second inner support surface of the base;
a first shoulder configured for engaging the first outer support surface of the base and a second shoulder configured for engaging the second outer support surface of the base; and
a first top flange and a second top flange configured for engaging the top portion of the base; and
a cutting tool configured for receipt in the aperture defined in the forward face of the tool holder.
17. The cutting tool assembly of claim 16, wherein the base includes a rearward portion that defines a cavity that is in communication with the aperture defined in the forward face of the tool holder such that an axial rearward end of the cutting tool extends into the cavity.
18. The cutting tool assembly of claim 16, further including means for securing the tool holder to the base.
19. The cutting tool assembly of claim 16, wherein the cutting tool includes a central longitudinal axis that is perpendicular to the plane containing the first inner support surface and the second inner support surface of the base.
20. The cutting tool assembly of claim 19, wherein the forward face of the tool holder is contained in a plane that is parallel to the plane containing the first inner support surface and the second inner support surface of the base.
,TagSPECI:TECHNICAL FIELD
The invention pertains generally to a cutting tool mounting assembly and/or a cutting tool assembly that is useful in association with machines for impinging a substrate or earth strata such as, for example, asphaltic roadway material, coal deposits, mineral formations and the like. More particularly, the invention pertains to a cutting tool mounting assembly and/or a cutting tool assembly, as well as the individual components of such assemblies.
BACKGROUND OF THE DISCLOSURE
One typically uses such assemblies in conjunction with a rotatable drum or driven member. The driven member rotates in such a fashion to drive the rotatable cutting bit or tool into earth strata to disintegrate the same into smaller pieces including fine particulates, i.e., cutting debris. The cutting bit or cutting tool, the cutting bit holder or cutting tool holder and the base or support block are each subjected to considerable stresses during mining operations, road milling operations or other like operations that can lead to wear and/or failure of one or more of the cutting tool assembly components. One source of wear occurs as a result of the mounting between the tool holder and the base and the contact therebetween. Accordingly, there is a desire to mount the tool holder in the base so as to minimize movement of the tool holder and reduce stress between the components in order to maximize the useful life of all the components of the cutting tool assembly. Nonetheless, due to operation of such cutting tool assemblies in severe operating conditions wear and/or failure will occur.
Thus, it can be appreciated that cutting tool assemblies can experience wear and/or failure in a number of ways due to the environment in which they operate and must be frequently replaced. It would thus be highly desirable to provide an improved cutting tool assembly and/or an improved cutting tool assembly that experiences an increase in useful tool life as compared to heretofore known such assemblies.
SUMMARY OF THE DISCLOSURE
In accordance with an aspect of the invention, a cutting tool mounting assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine and adapted for receiving a cutting tool includes a base configured for attachment to the surface of the rotatable driving member and a tool holder configured for attachment to the base. Also in accordance with an aspect of the invention, a cutting tool assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine includes a base configured for attachment to the surface of the rotatable driving member, a tool holder configured for attachment to the base and a cutting tool configured for receipt in the tool holder. The base and tool holder are configured to advantageously provide for decreased wear on the base and for a quick change relationship between the base and the tool holder.
In accordance with another aspect of the invention, a cutting tool mounting assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine and adapted for receiving a cutting tool includes a base configured for attachment to the surface of the rotatable driving member and a tool holder configured for attachment to the base. The base includes: a bottom surface, a top portion, and a front portion that defines a receptacle; a first inner support surface and a second inner support surface each contained in a plane that is angled relative to the bottom surface; and a first outer support surface and a second outer support surface each contained in a plane that is parallel to the bottom surface. The tool holder includes: a block member configured for receipt in the receptacle of the base; a forward face defining an aperture for receiving the cutting tool; a first rearward face configured for engaging the first inner support surface of the base and a second rearward face configured for engaging the second inner support surface of the base; a first shoulder configured for engaging the first outer support surface of the base and a second shoulder configured for engaging the second outer support surface of the base; and a first top flange and a second top flange configured for engaging the top portion of the base.
In accordance with another aspect of the invention, a cutting tool assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine includes a base configured for attachment to the surface of the rotatable driving member, a tool holder configured for attachment to the base and a cutting tool. The base includes: a bottom surface, a top portion, and a front portion that defines a receptacle; a first inner support surface and a second inner support surface each contained in a plane that is angled relative to the bottom surface; and a first outer support surface and a second outer support surface each contained in a plane that is parallel to the bottom surface. The tool holder includes: a block member configured for receipt in the receptacle of the base; a forward face defining an aperture for receiving the rotatable cutting tool; a first rearward face configured for engaging the first inner support surface of the base and a second rearward face configured for engaging the second inner support surface of the base; a first shoulder configured for engaging the first outer support surface of the base and a second shoulder configured for engaging the second outer support surface of the base; and a first top flange and a second top flange configured for engaging the top portion of the base. The cutting tool is configured for receipt in the aperture defined in the forward face of the tool holder.
These and other aspects of the present invention will be more fully understood following a review of this specification and drawings.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 is an isometric view of an assembly, in accordance with an aspect of the invention.
Figure 2 is an exploded isometric view of the assembly, in accordance with an aspect of the invention.
Figure 3 is an exploded isometric view of the assembly, in accordance with an aspect of the invention.
Figure 4 is a top view of the assembly, in accordance with an aspect of the invention.
Figure 4A is a sectional view along line 4A-4A of Figure 4, in accordance with an aspect of the invention.
Figure 5 is an exploded isometric sectional view of the assembly, in accordance with another aspect of the invention.
Figure 6 is a front view of the assembly, in accordance with an aspect of the invention.
Figure 6A is a sectional view along line 6A-6A of Figure 6, in accordance with an aspect of the invention.
Figure 6B is a sectional view along line 6B-6B of Figure 6, in accordance with an aspect of the invention.
DETAILED DESCRIPTION OF DISCLOSURE
The following description is for purposes of illustrating various aspects of the invention only and not for purposes of limiting the scope of the invention.
Referring to the Figures, there is illustrated a cutting tool assembly or cutting tool mounting assembly, generally designated as reference number 10, in accordance with various aspects of the invention. As will be apparent following a description of the invention herein, when referring generally to a “cutting tool assembly” adapted for attachment to a surface of a rotatable driving member of a cutting tool machine the invention generally includes a base configured for attachment to the surface of the rotatable driving member, a tool holder configured for attachment to the base and a cutting tool configured for receipt in the tool holder. When referring generally to “a cutting tool mounting assembly” adapted for attachment to a surface of a rotatable driving member of a cutting tool machine and adapted for receiving a cutting tool the invention generally includes a base configured for attachment to the surface of the rotatable driving member and a tool holder configured for attachment to the base. For simplification of description of the invention herein, these aspects of the invention will be generally referred to as an “assembly.”
It will be appreciated that the invention has application to various kinds of cutting tools useful in various kinds of cutting operations. Exemplary operations include, without limitation, road planing (or milling), coal mining, concrete cutting, and other kinds of cutting operations wherein a cutting tool with a hard cutting member impinges against a substrate (e.g., earth strata, pavement, asphaltic highway material, concrete, minerals and the like) breaking the substrate into pieces of a variety of sizes including larger-size pieces or chunks and smaller-sized pieces including dust-like particles. In addition, it will be appreciated that the cutting tool assembly 10 of the invention may be manufactured in various sizes and dimensions depending upon the desired application of the assembly.
Referring to Figures 1-6B, there is illustrated in detail the assembly 10 of the invention. The assembly 10 is adapted for attachment to a surface of a rotatable driving member of a cutting machine (not shown) such as, for example, a mining machine. The assembly 10 is attached or connected to the rotatable driving member such as, for example, a rotating drum by methods well known in the art such as, for example, welding. The assembly 10 is configured for mounting or receiving a cutting tool 12 with a hard cutting member 14 for impinging against a substrate, e.g., earth strata, pavement, asphaltic highway material, concrete, minerals and the like as is well known in the art.
The assembly 10 includes a base 16. The base 16 includes a bottom surface 18, a top portion 20, and a front portion 22 that defines a receptacle 24, and a rearward portion 26. The base 16 also includes a first inner support surface 28 and a second inner support surface 30 each contained in a plane that is angled relative to the bottom surface 18 of the base 16. The base 16 further includes a first outer support surface 32 and a second outer support surface 34 each contained in a plane that is parallel to the bottom surface 18. In one aspect of the invention, the top portion 20 includes a first top portion 36 spaced apart from a second top portion 38 contained in a plane that is parallel to the bottom surface 18 of base 16. The base 16 also includes a first side 17 and an opposing second side 19.
The assembly 10 also includes a tool holder 40 configured to be releasably attached to the base 16. The tool holder 40 includes a block member 42 configured for receipt in the receptacle 24 of the base 16. In another aspect of the invention, the block 42 engages with the receptacle 24 of the base 16.
The tool holder 40 further includes a forward face 44 defining an aperture 46 for receiving the cutting tool 12. The tool holder 40 also includes a first rearward face 48 configured for engaging the first inner support surface 28 of the base 16 and a second rearward face 50 configured for engaging the second inner support surface 30 of the base 16. In one aspect, the first rearward face 48 and the second rearward face 50 of the tool holder 40 are spaced apart by the aperture 46 that extends through the forward face 44 and are contained in a plane that is angled relative to the bottom surface 18 of the base 16.
In addition, the tool holder 40 includes a first shoulder 52 configured for engaging the first outer support surface 32 of the base 16 and a second shoulder 54 configured for engaging the second outer support surface 34 of the base 16. The first shoulder 52 and the second shoulder 54 are both parallel to the bottom surface 18 of base 16.
In another aspect, the tool holder 40 also includes a first top flange 56 and a second top flange 58 configured for engaging the top portion 20 of the base 16 and, more specifically, for engaging the first top portion 36 and the second top portion 38, respectively, of the top portion 20. In addition, the plane containing the first outer support surface 32 and the second outer support surface 34 is parallel to a plane containing the top portion 20 of the base and, more specifically, is parallel to a plane containing the first top portion 36 and the second top portion 38.
In another aspect of the invention, the base 16 further includes a first outer support wall 60 extending between the first outer support surface 32 and the first top portion 36 and a second outer support wall 62 extending between the second outer support surface 34 and the second top portion 38. The first outer support wall 60 of the base 16 and the second outer support wall 62 of the base 16 are each contained in a plane that is perpendicular to the bottom surface 18 of the base 16.
In addition, the tool holder 40 further includes a first outer bearing surface 64 configured for engaging the first outer support wall 60 of the base 16 and a second outer bearing surface 66 configured for engaging the second outer support wall 62 of the base 16.
In another aspect of the invention, the block member 42 of the tool holder 40 has a first side face 91 and a second side face 92 parallel to each other and each contained in a plane that is perpendicular to the bottom surface 18 of base 16.
In addition, the block member 42 of the tool holder 40 contains a front face 93 and rear face 94 parallel to each other and perpendicular to the bottom surface 18 of base 16. In one aspect, the width of the block 42 (from side face 91 to side face 92) is greater than the depth of the block (from front face 93 to rear face 94) which advantageously is a technical advantage in terms of load bearing capacity of the tool holder 40.
In another aspect of the invention, the base 16 further includes a first inner support wall 68 extending between the first inner support surface 28 and the first top portion 36 and a second inner support wall 70 extending between the second inner support surface 30 and the second top portion 38. The first inner support wall 68 of the base 16 and the second inner support wall 70 of the base 16 are each contained in a plane that is perpendicular to the bottom surface 18 of the base 16.
In addition, the tool holder 40 further includes an inner bearing surface 72 configured for engaging the first inner support wall 68 and the second inner support wall 70 of the base 16.
In another aspect of the invention, the base 16 further includes an elongated support area 74 between the receptacle 24 and both the first inner support surface 28 and the second inner support surface 30. In addition, the tool holder 40 includes an elongated support surface 76 configured for engaging the elongated support area 74 of the base 16.
In another aspect of the invention, the rearward portion 26 of the base 16 defines a cavity 78 that is in communication with the aperture 46 that extends through the forward face 44 and the first rearward face 48 and the second rearward face 50 of the tool holder 16. When assembled, an axial rearward end 80 of the cutting tool 12 extends into the cavity 78.
In accordance with another aspect of the invention, the assembly can include means for releasably securing the tool holder 40 to the base 16. In one example, a retaining bolt 82 is accessible in the cavity 78 and is inserted in a first threaded bore 84 formed in the base 16 which is aligned with a second threaded bore 86 formed in the block member 42 of the tool holder 40 (see, for example, Figures 4A and 5). It will be appreciated that other means may be provided that operate in a similar or like manner for releasably securing the tool holder 40 to the base 16.
In accordance with another aspect of the invention, the cutting tool 12 includes a central longitudinal axis A-A that is perpendicular to the plane containing the first inner support surface 28 and the second inner support surface 30 of the base 16. In addition, the forward face of the tool holder 44 is contained in a plane that is parallel to the plane containing the first inner support surface 28 and the second inner support surface 30 of the base 16.
In accordance with another aspect of the invention, the base 16 can also include a force absorption element 88 positioned in the receptacle 24 adjacent the bottom surface 18. The force absorption element 88 can be formed of, for example, neoprene, rubber or like materials having sufficient compressibility such that the block member 42 contacts the force absorption element 88 and absorbs the forces acting on the tool holder 40 during a cutting operation.
Accordingly, it will be appreciated that the assembly 10 described herein and, more specifically, the base 16 and tool holder 40 are advantageously configured to provide for decreased wear on the base 16 due to the tool holder 40 substantially covering the base 16 and for a quick change relationship between the base 16 and the tool holder 40. Thus, the position of the support faces described herein for both the base 16 and the tool holder 40 gives a unique advantage in increasing the overall load bearing capacity of the assembly 10.
Whereas particular aspects of this invention have been described above for purposes of illustration, it will be evident to those skilled in the art that numerous variations of the details of the present invention may be made without departing from the invention as defined in the appended claims.