This application claims priority to Taiwan Application Serial Number 106211075, filed Jul. 27, 2017, which is herein incorporated by reference.
The present disclosure relates to a cutting tool holding device. More particularly, the present disclosure relates to a cutting tool holding device for a road planer.
Milling drums of road planers are equipped with a plurality of cutting tools generally, and the cutting tools are arranged in spiral-shaped. When road planers are running, the cutting tools can mill by rotating milling drums, and the cutting tools are disposed on milling drums by cutting tool holding devices.
The conventional cutting tool holding device includes a base and a holder, the holder is disposed on the base and for the cutting tool to connect, wherein the holder is engaged with the base by a removable fastening member so as to repair or replace the cutting tool.
In use, the cutting tool for milling road would apply a high pressure on the road and may cause damage easily due to the reaction force. When the structure configuration of the cutting tool holding device is improper, more serious damages would cause by the reaction force easily due to infirm engagement between the holder and the base. As a result, service life of the cutting tools and the cutting tool holding device would be reduced cost of replacement and repair would be increased. Moreover, since the base and the holder are impacted strongly by the reaction force, the structural strength of the base and the holder also should be considered.
Therefore, it is important to reinforce the engagement between the base and the holder and increase the ease of detachment between the holder and the base.
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 limiting set. The base includes a body, a storage hole and a non-circular channel. The storage hole is disposed in the body, wherein the storage hole includes an inner wall and an opening hole. The opening hole is located on the inner wall. The non-circular channel is disposed in the body and communicated with the storage hole via the opening hole, and the non-circular channel has an axis. The holder is disposed on the base and includes a disposing portion and a connecting shaft portion. The disposing portion is for the cutting tool to connect. The connecting shaft portion is connected to the disposing portion. The connecting shaft portion is for inserting into the storage hole, wherein the connecting shaft portion includes a shaft body and at least one positioning portion. The shaft body is accommodated in the storage hole. The positioning portion is concave on the shaft body and relative to the opening hole. The limiting set is disposed in the non-circular channel and includes an abutting member and a bolt. The abutting member is accommodated in the non-circular channel, and a cross-sectional shape of the abutting member is relative to a cross-sectional shape of the non-circular channel. The bolt is passed through the abutting member, wherein the abutting member is moved to the opening hole along the axis by rotating the bolt so as to push the positioning portion and abut the shaft body.
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 is disposed on a milling drum of a road planer, wherein the cutting tool holding device includes a base, a holder and a limiting set. The base is disposed on a surface of the milling drum, wherein the base includes a body, a storage hole and a non-circular channel. The storage hole is disposed in the body and has a hole axis perpendicular to an axis of the milling drum, wherein the storage hole includes an inner wall and an opening hole. The opening hole is located on the inner wall. The non-circular channel is disposed in the body and communicated with the storage hole via the opening hole, wherein the non-circular channel has an axis perpendicular to the hole axis and the axis of the milling drum. The holder is disposed on the base and includes a disposing portion and a connecting shaft portion. The disposing portion is for the cutting tool to connect. The connecting shaft portion is connected to the disposing portion. The connecting shaft portion is for inserting into the storage hole, wherein the connecting shaft portion includes a shaft body and at least one positioning portion. The shaft body is accommodated in the storage hole. The positioning portion is concave on the shaft body and relative to the opening hole. The limiting set is disposed in the non-circular channel and includes an abutting member and a bolt. The abutting member is accommodated in the non-circular channel. The bolt is passed through the abutting member, wherein the abutting member is moved to the opening hole along the axis by rotating the bolt so as to push the positioning portion and abut the shaft body.
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:
Please refer to
The base 200 includes a body 210, a storage hole 220 and a non-circular channel 230. The storage hole 220 is disposed in the body 210, wherein the storage hole 220 includes an inner wall 221 and an opening hole 222. The opening hole 222 is located on the inner wall 221. The non-circular channel 230 is disposed in the body 210 and communicated with the storage hole 220 via the opening hole 222, and the non-circular channel 230 has an axis I1. The holder 300 is disposed on the base 200 and includes a disposing portion 310 and a connecting shaft portion 320. The disposing portion 310 is for the cutting tool to connect. The connecting shaft portion 320 is connected to the disposing portion 310. The connecting shaft portion 320 is for inserting into the storage hole 220, wherein the connecting shaft portion 320 includes a shaft body 322 and at least one positioning portion 321. The shaft body 322 is accommodated in the storage hole 220. The positioning portion 321 is concave on the shaft 322 and relative to the opening hole 222. The limiting set 400 is disposed in the non-circular channel 230 and includes an abutting member 420 and a bolt 410. The abutting member 420 is accommodated in the non-circular channel 230, and a cross-sectional shape of the abutting member 420 is relative to a cross-sectional shape of the non-circular channel 230. The bolt 410 is passed through the abutting member 420, wherein the abutting member 420 is moved to the opening hole 222 along the axis I1 by rotating the bolt 410 so as to push the positioning portion 321 and abut the shaft body 322.
Therefore, the abutting member 420 is limited by the non-circular cross-sectional shape of the non-circular channel 230, and the abutting member 420 is moved along the axis I1 by rotating the bolt 410 so as to abut the connecting shaft portion 320. As a result, the purposes of the simple structure and easy assembling can be achieved. At the same time, the integrity of the entire cutting tool holding device 100 can be maintained by the simple structure of the base 200, and when the strength of the base 200 is increased, the reaction force can be resisted in use. The details of the structure of the cutting tool holding device 100 will be described as follows.
The storage hole 220 and the non-circular channel 230 are disposed in the body 210. The storage hole 220 and the non-circular channel 230 are staggered and communicated with each other. That is, the opening hole 222 of the inner wall 221 in the storage hole 220 can be deemed as the opening hole (not labeled) of the inner wall (not labeled) in the non-circular channel 230, so that the storage hole 220 and the non-circular channel 230 are communicated with each other.
The holder 300 is disposed on the base 200 via the connecting shaft portion 320 which is inserted into the storage hole 220. In order to assemble the holder 300 and the base 200 firmly, the disposing portion 310 of the holder 300 includes an embedding section 311, wherein the embedding section 311 is connected to the connecting shaft portion 320. The storage hole 220 includes a circular opening 223 is communicated with an external environment. The base 200 further includes a positioning concave 240. The positioning concave 240 is disposed in the body 210 and includes an embedding notch 241, wherein a shape of the embedding notch 241 is relative to the embedding section 311. The embedding notch 241 includes a bottom wall 2411, wherein the circular opening 223 is located on the bottom wall 2411. The shaft body 322 is inserted into the storage hole 220 through the circular opening 223, and the embedding section 311 is embedded in the embedding notch 241. Furthermore, the disposing portion 310 can further include a plurality of connecting surfaces 312 which are connected around the embedding section 311, and the positioning concave 240 further includes a plurality of positioning surfaces 242 which surround the embedding notch 241 and relative to the connecting surfaces 312.
More specifically, the embedding notch 241 is concave on the body 210, wherein the embedding notch 241 is a shallow trough structure as rectangular. The plurality of positioning surfaces 242 surround the embedding notch 241 so as to form the positioning concave 240 in the body 210 with the embedding notch 241. By the arrangement of the circular opening 223 located on the bottom wall 2411 of the embedding notch 241, when the shaft body 322 of the holder 300 is inserted into the storage hole 220 through the circular opening 223, the embedding section 311 of the disposing portion 310 can be accommodated in the embedding notch 241, at the same time, each of the connecting surfaces 312 and each of the positioning surfaces 242 can be abutted with each other.
In the embodiment of
The abutting member 420 includes a screw hole 425. The screw hole 425 is coupled with a screw thread of the bolt 410. The abutting member 420 is limited by the non-circular shape of the non-circular channel 230 such that the abutting member 420 cannot be rotated in the non-circular channel 230. Therefore, the abutting member 420 can be moved along the axis I1 but not rotated by rotating the bolt 410. When the connecting shaft portion 320 of the holder 300 is inserting into the storage hole 220, the positioning portion 321 is relative to the opening hole 222, and the abutting member 420 is moved to the opening hole 222 by rotating the bolt 410, so that the abutting member 420 can be inserted into the positioning portion 321, and the connecting shaft portion 320 cannot be pulled out from the storage hole 220.
The cross-sectional shape of the non-circular channel 230 can be ellipse, and the abutting member 420 is cylindroid. When the abutting member 420 is cylindroid, the smoothness of moving along the axis I1 can be increased, and at the same time, the stress concentration at any single position can be avoided so as to increase the service life. In other embodiments, the cross-sectional shape of the non-circular channel 230 can be any non-circular shape, such as triangular, square, rectangular or polygonal, and will not be limited thereto.
In the embodiment of
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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 |
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106211075 U | Jul 2017 | TW | national |
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Number | Date | Country | |
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20190030755 A1 | Jan 2019 | US |