This application claims priority to China Application Serial Number 201520179252.5, filed Mar. 27, 2015, which is herein incorporated by reference.
1. Technical Field
The present disclosure relates to a holding device. More particularly, the present disclosure relates to a cutting tool holding device.
2. Description of Related Art
A cutting tool holding device is used to hold a cutting tool and configured to be attached to a road planer for cutting, mining, excavating the ground or applying a surface roughness treatment to a road.
Conventionally, the cutting tool holding device includes a base and a cutting tool holder for receiving a cutting, tool. The, base is fixed on a peripheral surface of a working member (such as a roller) of a machinery (such as a road planer), and the cutting tool holder is engaged with the base by some fastening members. The cutting tool received in the cutting tool holder is mounted along a tangent of the base for facilitating the excavating or cutting operations applied to the ground. In the working process of the aforementioned machinery, an excavating operation is first applied to a processed material (such as concrete asphalt over a road) by the cutting tool; as the roller rotates, a cutting operation is then applied to the ground by the cutting tool so as to destroy the processed material.
In general, the processed material is solid and stiff, and a reaction force generated from the processed material during the working process will exert on the cutting tool. Thus the cutting tool working on it only has a rather limited lifetime. Furthermore, when the base and the cutting tool holder are not firmly engaged, serious damages caused by the reaction force occur in the cutting tool holder and the base. As a result, the cutting tool holder and the base are also in need of the frequent replacement. Consequently, the maintenance cost of the cutting tool holding device is high in the art.
Therefore, it is important to reinforce the engagement between the base and the cutting tool holder and increase a load value of the base and the load value of t he cutting tool holder for the reaction force of the base and the cutting tool holder for prolonging the life span of the cutting tool holding device so as to reduce the maintenance cost thereof.
According to one aspect of the present disclosure, a cutting tool holding device for holding a cutting tool is provided. The cutting tool holding device includes a base, a holder, and a fastening member. The base includes a front rake wall, a back rake wall, and a positioning hole. The front rake wall has a rabbet, and the back rake wall connected to the front rake wall has an angular receiving hole. The positioning hole is penetrated one end of the base and communicated with the angular receiving hole. The holder is mounted on the base for receiving the cutting tool, wherein the holder includes a main body and a tool receiving corner post. The main body includes a first abutting portion and a second abutting portion. The first abutting portion has a first abutting surface and an engaging portion, wherein the first abutting surface is abutted against the front rake wall, and the engaging portion is detachably engaged into the rabbet. The second abutting portion has a second abutting surface abutted against the back rake wall. The tool receiving corner post extending projects from the main body and is correspondingly set into the angular receiving hole, wherein a position limiting groove is formed on the tool receiving corner post corresponded with the positioning hole. The fastening member is fastened in the positioning hole and pressed against the position limiting groove.
According to another aspect of the present disclosure, a cutting tool holding device for holding a cutting tool is provided. The cutting tool holding device includes a base, a holder, a fastening member, and a draw bolt member. The base includes a front rake wall, a back rake wall, and a positioning hole. The front rake wall has a rabbet; and the back rake wall connected to the front rake wall has an angular receiving hole. The positioning hole is penetrated one end of the base and communicated with the angular receiving hole. The holder is mounted on the base for receiving the cutting tool, wherein the holder includes a main body and a tool receiving corner post. The main body includes a first abutting portion and a second abutting portion. The first abutting portion has a first abutting surface and an engaging portion, wherein the first abutting surface is abutted against the front rake wall, and the engaging portion is detachably engaged into the rabbet. The second abutting portion has a second abutting, surface abutted against the back rake wall. The tool receiving corner post extending projects from the main body and is correspondingly set into the angular receiving hole, wherein a position limiting groove is formed on the tool receiving corner post corresponded with the positioning hole. The fastening member is movably disposed in the positioning hole and pressed against the position limiting groove, wherein a threaded hole is formed in one end of the fastening member, and a sectional area of the fastening member gradually changes along an extending direction of the fastening member. The draw bolt member is limitedly disposed in the positioning hole, wherein the draw bolt member has a threading portion for screwing into the threaded hole, whereby the draw bolt member draws the fastening member moving in the positioning hole to change a pressing extent between the fastening member and the position limiting groove.
The present disclosure can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows:
The base 110 includes a front rake wall 112, a back rake wall 114, a positioning hole 116, and a first pushing hole 118. The front rake wall 112 is connected to the back rake wall 114, wherein the front rake wall 112 has a rabbet 113, and the front rake wall 112 has an angular receiving hole 115. The angular receiving hole 115 has a central axis (not shown), wherein the central axis of the angular receiving hole 115 is paralleled to an extending direction of the rabbet 113. The positioning hole 116 is penetrated one end of the base 110 and communicated with the angular receiving hole 115. The positioning hole 116 has the central axis (not shown), wherein the central axis of the positioning hole 116 is perpendicular to an extending direction of the angular receiving hole 115. The first pushing hole 118 is formed on the other side of the base 110 and communicated with the angular receiving hole 115.
The holder 120 is mounted on the base 110 for receiving the cutting tool B, wherein the holder 120 includes a main body 130 and a tool receiving corner post 140.
The main body 130 includes a first abutting portion 132 and a second abutting portion 136. The first abutting portion 132 has a first abutting surface 133 and an engaging portion 135, wherein the first abutting surface 133 is abutted against the front rake wall 112, and the engaging portion 135 is detachably engaged into the rabbet 113. The second abutting portion 136 has a second abutting surface 137 and a mounting surface 139. The second abutting surface 137 is a flat surface and is fitting abutted against the back rake wall 114. The mounting surface 139 is located on the other side of the second abutting surface 137, and the mounting surface 139 has a holding hole 139a for holding the cutting tool B (as shown in
The tool receiving corner post 140 extending projects from the main body 130 and is correspondingly set into the angular receiving hole 115. A shape of the angular receiving hole 115 is complementary to the shape of the tool receiving corner post 140 so that the tool receiving corner post 140 does not move relative to the base 110 after setting into the angular receiving hole 115. A position limiting groove 142 is formed on the tool receiving corner post 140 corresponded with the positioning hole 116. A second pushing hole 146 is formed on the tool receiving corner post 140 near the main body 130, wherein the second pushing hole 146 is communicated with the holding hole 139a and the first pushing hole 118 for removing the cutting tool B.
The fastening member 150 is a C-shaped elastic tube. The fastening member 150 is fastened in the positioning hole 116 of the base 110 by an expanding elasticity thereof and pressed against the position limiting groove 142 of the tool receiving corner post 140.
According to the foregoing embodiment of the disclosure, the cutting tool holding device 100 has advantages as follows. First, the shape complementation between the angular receiving hole 115 and the tool receiving corner post 140 can avoid a rotation of the holder 120. Second, the engagement between the engaging portion 135 and the rabbet 113, the design of the second abutting surface 137 of the main body 130 and the second side surface 145 of the tool receiving corner post 140, and the fix of the holder 120 on the base 110 by the fastening member 150 can enhance the stability of the engagement between the base 110 and the holder 120 and increase a load value of the base 110 and the load value of the holder 120 for the reaction force. Moreover, the reduced thickness of the main body 130 of the holder 120 can decrease the reaction force generated from a processed material acting on the cutting tool holding device 100. Therefore, the life span of the base 110 and the holder 120 can be prolonged, and the maintenance cost can be reduced.
The base 310 includes the front rake wall 312, the back rake wall 314, the positioning hole 316, and the first pushing hole 318. The front rake wall 312 is connected to the back rake wall 314, wherein the front rake wall 312 has the rabbet 313 and the back rake wall 314 has an angular receiving hole 315. The angular receiving hole 315 has a central axis (not shown), wherein the central axis of the angular receiving hole 315 is paralleled to an extending direction of the rabbet 313. The positioning hole 316 is penetrated one end of the base 310 and communicated with the angular receiving hole 315. The positioning hole 316 has the central axis (not shown), wherein the central axis of the positioning hole 316 is perpendicular to an extending direction of the angular receiving hole 315. The first pushing hole 318 is formed on the other side of the base 310 and communicated with the angular receiving hole 315.
The holder 320 is mounted on the base 310 for receiving the cutting tool B, wherein the holder 320 includes the main body 330 and the tool receiving corner post 340.
The main body 330 includes the first abutting portion 332 and the second abutting portion 336. The first abutting portion 332 has the first abutting surface 333 and the engaging portion 335, wherein the first abutting surface 333 is abutted against the front rake wall 312, and the engaging portion 335 is detachably engaged into the rabbet 313. The second abutting portion 336 has the second abutting surface 337 and the mounting surface 339. The second abutting surface 337 is the flat surface and is fitting abutted against the back rake wall 314. The mounting surface 339 is located on the other side of the second abutting surface 337, and the mounting surface 339 has a holding hole 339a for holding the cutting tool B (as shown in
The tool receiving corner post 340 extending projects from the main body 330 and is correspondingly set into the angular receiving hole 315. The shape of the angular receiving hole 315 is complementary to the shape of the tool receiving corner post 340, so that the tool receiving corner post 340 does not move relative to the base 310 after setting into the angular receiving hole 315. The position limiting groove 342 is formed on the tool receiving corner post 340 corresponded with the positioning hole 316. The second pushing hole 346 is formed on the tool receiving corner post 340 near the main body 330, wherein the second pushing hole 346 is communicated with the holding hole 339a and the first pushing hole 318 for removing the cutting tool B.
The fastening member 350 is movably disposed in the positioning hole 316 and pressed against the position limiting groove 342, wherein a threaded hole 354 is formed in one end of the fastening member 350. In this embodiment, the threaded hole 354 is penetrated the fastening member 350 to form a through hole structure. In other embodiment, the threaded hole 354 can be not penetrated the fastening member 350. The fastening member 350 has n outer surface with a first inclined surface 352, thus a sectional area of the fastening member 350 gradually changes along the extending direction of the fastening member 350. Furthermore, the first inclined surface 352 presses the position limiting groove 342 of the tool receiving corner post 340.
The draw bolt member 360 is limitedly disposed in the positioning hole 316, wherein the draw bolt member 360 has a threading portion 362 and a stair portion 364 connected to the threading portion 362. The threading portion 362 of the draw bolt member 360 is screwed into the threaded hole 354 of the fastening member 350, whereby the draw bolt member 360 draws the fastening member 350 moving in the positioning hole to change a pressing extent between the fastening member 350 and the position limiting groove 342.
According to the foregoing embodiment of the disclosure, the shape complementation between the angular receiving hole and the tool receiving corner post can avoid the rotation of the holder. The engagement between the engaging portion and the rabbet can fix the holder on the base. The draw bolt member draws the fastening member moving in the positioning hole to change the pressing extent between the base and the holder so that it can effectively avoid the engagement between the base and the holder being loose. Thus the present disclosure can enhance the stability of the engagement between the base and the holder and increase a load value of the base and the load value of the holder for the reaction force. The life span of the base and the holder can be prolonged, and the maintenance cost can be reduced. In addition, a user only need to spin the draw bolt member for precisely adjusting the pressing extent among the fastening member, the base, and the holder because the threading portion of the draw bolt member is screwed into the threaded hole of the fastening member. Therefore the present disclosure further has the advantages of easy operation and high accuracy of adjustment.
Although the present disclosure has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present disclosure without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the present disclosure cover modifications and variations of this disclosure provided they fall within the scope of the following claims.
Number | Date | Country | Kind |
---|---|---|---|
201520179252.5 | Mar 2015 | CN | national |