|
(11) | EP 3 248 747 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||||||
| (54) | CUTTING TOOL HOLDING DEVICE |
| (57) A cutting tool holding device (100) for holding a cutting tool (B) is provided. The
cutting tool holding device (100) includes a base (110), a holder (120), and a fastening
member (150). The base (110) includes an embedding portion (113), an arc receiving
hole (115), and a positioning hole (116). The holder (120) includes a main body (130),
an arc receiving post (140), and a guiding block (131). The main body (130) includes
an embedding concave (135) which is detachably embedded with the embedding portion
(113). The arc receiving post (140) is correspondingly set into the arc receiving
hole (115) for stable assembly, and the scrap will be guided and discharged by the
guiding block (131).
|
BACKGROUND
Technical Field
[0001] The present disclosure relates to a holding device. More particularly, the present disclosure relates to a cutting tool holding device for a road planer.
Description of Related Art
[0002] 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.
[0003] 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 or 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.
[0004] 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.
[0005] 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 the 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.
[0006] Furthermore, the scrap of the road surface during the working process of the road planer will be accumulated in front of the cutting tool (e.g. the scrap is dirt, gravel, concrete or asphalt). Due to the cutting tool must be forced to continue working action against the road surface, but the accumulated scrap in front of the cutting tool will produce interference and resistance, and therefore the road planer will reduce the drilling efficiency and waste energy. In addition, the road planer must always be carried out each of the cutting tools cleaning and checking, and the work of the road planer must often wait to clean up not only wasting the human cost, also wasting of time. Therefore, the foregoing problems are the road planer industry's improvement goals.
SUMMARY
[0007] 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 has a front rake wall, a back rake wall, and a positioning hole. The front rake wall has an embedding portion, and the back rake wall is connected to the front rake wall. The back rake wall has an arc receiving hole and the positioning hole is communicated with the arc receiving hole. The holder is mounted on the base for receiving the cutting tool, and the holder has a main body, an arc receiving post, and a guiding block. The main body has a first abutting portion and a second abutting portion, and the first abutting portion has a first abutting surface and an embedding concave. The first abutting surface is abutted against the front rake wall, and the embedding portion is detachably embedded into the embedding concave. The second abutting portion has a second abutting surface, and the second abutting surface is abutted against the back rake wall. The arc receiving post is extending projecting from the main body, and the arc receiving post is correspondingly set into the arc receiving hole. A position limiting groove is formed on the arc receiving post corresponding to the positioning hole, and the guiding block is projected corresponding to the cutting tool. The fastening member is fastened in the positioning hole and pressed against the position limiting groove.
[0008] 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, and a fastening member. The base has a front rake wall, a back rake wall, and a positioning hole. The front rake wall has an embedding portion, and the back rake wall is connected to the front rake wall. The back rake wall has an arc receiving hole and the positioning hole is communicated with the arc receiving hole. The arc receiving hole has two abutted surfaces. The holder is mounted on the base for receiving the cutting tool, and the holder has a main body, an arc receiving post, and a guiding block. The main body has a first abutting portion and a second abutting portion. The first abutting portion has a first abutting surface and an embedding concave, and the first abutting surface is abutted against the front rake wall, and the embedding portion is detachably embedded into the embedding concave. The second abutting portion has a second abutting surface, and the second abutting surface is abutted against the back rake wall. The arc receiving post is extending projecting from the main body. The arc receiving post is correspondingly set into the arc receiving hole, and a position limiting groove is formed on the arc receiving post corresponding to the positioning hole. The arc receiving post has at least two side surfaces and the two side surfaces are abutted against the two abutted surfaces, and the guiding block is projected corresponding to the cutting tool. The fastening member is fastened in the positioning hole and pressed against the position limiting groove.
[0009] Wherein each of the arc receiving post and the arc receiving hole has a cross section shape being drop-shaped, and each of the arc receiving post and the arc receiving hole has a cross section shape being heart-shaped.
[0010] Wherein the arc receiving post has an arc lead angle of an end, and the guiding block has at least one guide slant surface, and the guide slant surface corresponding to the cutting tool. The guiding block has a plurality of guide slant surfaces, the guide slant surfaces are gradually reducing heights from an inside of the guiding block to an outside of the guiding block, and the guiding block is a triangular prism-shaped.
[0011] Wherein each of the embedding portion and the embedding concave is a triangular ingot-shaped.
[0012] Wherein the base has two centering inside surfaces, and that each is inward incline, and the holder has two centering outside surfaces that each is outward incline.
[0013] Wherein the guiding block has at least one guide slant surface corresponding to the cutting tool, and the guiding block has a plurality of guide slant surfaces, the guide slant surfaces are gradually reducing heights from an inside of the guiding block to an outside of the guiding block.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] 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:
Fig. 1 is a perspective combination view of a cutting tool holding device according to the first embodiment of the present disclosure;
Fig. 2 is a perspective exploded view of the cutting tool holding device shown in Fig. 1;
Fig. 3 is a side view of a holder shown in Fig. 1;
Fig. 4 is a front side view of the holder of Fig. 1;
Fig. 5 is a rear side view of the holder of Fig. 1;
Fig. 6 is a perspective combination view of the cutting tool holding device shown in Fig. 1;
Fig. 7 is an operating schematic view of a road planer; and
Fig. 8 is an operating schematic view of a guiding block of the road planer of Fig. 7.
DETAILED DESCRIPTION
[0015] Fig. 1 is a perspective combination view of a cutting tool holding device 100 according to the first embodiment of the present disclosure. Fig. 2 is a perspective exploded view of the cutting tool holding device 100 shown in Fig. 1. Fig. 3 is a side view of a holder 120 shown in Fig. 1, Fig. 4 is a front side view of the holder 120 of Fig. 1, and Fig. 5 is a rear side view of the holder 120 of Fig. 1. Fig. 6 is a perspective combination view of the cutting tool holding device 100 shown in Fig. 1. In Figs. 1, 2, and 3, the cutting tool holding device 100 is for holding a cutting tool B (as shown in Fig. 6). The cutting tool holding device 100 includes a base 110, a holder 120, and a fastening member 150. The holder 120 is mounted on the base 110, and the fastening member 150 is disposed in the base 110.
[0016] 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 an embedding portion 113 that is a triangular block, and the front rake wall 112 has an arc receiving hole 115. The arc receiving hole 115 has a cross section shape being heart-shaped, and the arc receiving hole 115 has two abutted surfaces 1151 in lower edge. The arc receiving hole 115 has a central axis (not shown), wherein the central axis of the arc receiving hole 115 is paralleled to an extending direction of the embedding portion 113. The positioning hole 116 is penetrated one end of the base 110 and communicated with the arc 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 arc receiving hole 115. The first pushing hole 118 is formed on the other side of the base 110 and communicated with the arc receiving hole 115. The base 110 has two centering inside surfaces 1101, and each of the two centering inside surfaces 1101 is inward incline.
[0017] 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 an arc receiving corner post 140.
[0018] The main body 130 includes a first abutting portion 132, a second abutting portion 136, and a guiding block 131. The first abutting portion 132 has a first abutting surface 133 and an embedding concave 135, wherein the first abutting surface 133 is abutted against the front rake wall 112, and the embedding portion 113 is detachably engaged into the embedding concave 135. 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 Fig. 6). Wherein, the holder 120 has two centering outside surfaces 1201 that each is outward incline, and the two centering outside surfaces 1201 are abutted against the two centering inside surfaces 1101 of the base 110. The two centering outside surfaces 1201 are fitting abutted against the two centering inside surfaces 1101 for a center correction effect. In addition, the guiding block 131 is projected corresponding to the cutting tool B. The guiding block 131 has a plurality of guide slant surfaces 1311, and the guide slant surfaces 1311 are gradually reducing heights from an inside of the guiding block 131 to an outside of the guiding block 131. The guiding block 131 is a triangular prism-shaped.
[0019] The arc receiving post 140 extending projects from the main body 130 and is correspondingly set into the arc receiving hole 115. Each of the arc receiving post 140 and the arc receiving hole 115 has a cross section shape being heart-shaped. The shape of the arc receiving hole 115 is complementary to the shape of the arc receiving corner post 140 so that the arc receiving post 140 does not move relative to the base 110 after setting into the arc receiving hole 115. A position limiting groove 142 is formed on the arc receiving post 140 corresponded with the positioning hole 116. The arc receiving post 140 has at least two side surfaces 1401 and the two side surfaces 1401 are abutted against the two abutted surfaces 1151. In addition, the arc receiving post 140 has an arc lead angle 1402 of an end, and an operator can conveniently and quickly make the arc receiving post 140 into the arc receiving hole 115.
[0020] The fastening member 150 is built up in combination with a latch 151 and a bolt 152. The fastening member 150 is fastened in the positioning hole 116 of the base 110 and pressed against the position limiting groove 142 of the arc receiving corner post 140.
[0021] Fig. 7 is an operating schematic view of a road planer A, and Fig. 8 is an operating schematic view of a guiding block of the road planer A of Fig. 7. In Figs. 7 and 8, the center of gravity of the cutting tool holding device 100 can move back to near the base 110, because of each of the arc receiving post 140 and the arc receiving hole 115 has a cross section shape being heart-shaped, and the two side surfaces 1401 of the arc receiving post 140 are abutted against the two abutted surfaces 1151 of the arc receiving hole 115. In addition, the two side surfaces 1401 and the two abutted surfaces 1151 can increase the contact area, avoid the leverage effect, and reduce reaction force thereof.
[0022] Therefore, the arc receiving post 140 cooperates with the arc receiving hole 115 for avoiding the holder 120 turned. The base 110, the holder 120, and the fastening member 150 are stably assembled, because of the embedding concave 135 is assembled together with the embedding portion 113 and the two centering outside surfaces 1201 are abutted against the two centering inside surfaces 1101. The base 110 and the holder 120 have a higher loading capacity, longer using life, and less maintenance costs.
[0023] According to Fig. 8, the guiding block 131 is projected corresponding to the cutting tool B. The guiding block 131 has a plurality of guide slant surfaces 1311, and the guide slant surfaces 1311 are gradually reducing heights from an inside of the guiding block 131 to an outside of the guiding block 131. The guiding block 131 is a triangular prism-shaped. When a plurality of the cutting tool holding devices 100 are installed on the road planer A, the scrap C of the road surface will be accumulated in front of the cutting tool B (e.g. the scrap is dirt, gravel, concrete or asphalt). Therefore, the scrap C will be guided and discharged through the guide slant surfaces 1311 of the guiding block 131, and the cutting tool B will not reduce the drilling efficiency and waste energy. In addition, the less maintenance costs can be reduced by the guiding block 131 of the holder 120.
a base (110) having a front rake wall(112), a back rake wall(114), and a positioning hole(116), the front rake wall(112) having an embedding portion (113), and the back rake wall(114) connected to the front rake wall(112), wherein the back rake wall(114) has an arc receiving hole(115) and the positioning hole(116) is communicated with the arc receiving hole(115);
a holder(120) mounted on the base (110) for receiving the cutting tool(B), the holder(120) having a main body (130), an arc receiving post (140), and a guiding block (131), the main body (130) having a first abutting portion (132) and a second abutting portion (136), the first abutting portion (132) having a first abutting surface(133) and an embedding concave (135), the first abutting surface(133) abutted against the front rake wall(112), and the embedding portion (113) detachably embedded into the embedding concave (135), the second abutting portion (136) having a second abutting surface(137), and the second abutting surface(137) abutted against the back rake wall(114), the arc receiving post (140) extending projecting from the main body (130), wherein the arc receiving post (140) is correspondingly set into the arc receiving hole(115), and a position limiting groove (142) is formed on the arc receiving post (140) corresponding to the positioning hole(116), and the guiding block (131) is projected corresponding to the cutting tool(B); and
a fastening member(150) fastened in the positioning hole(116) and pressed against the position limiting groove (142).
a base (110) having a front rake wall(112), a back rake wall(114), and a positioning hole(116), the front rake wall(112) having an embedding portion (113), and the back rake wall(114) connected to the front rake wall(112), wherein the back rake wall(114) has an arc receiving hole(115) and the positioning hole(116) is communicated with the arc receiving hole(115), and the arc receiving hole(115) has two abutted surfaces(1151);
a holder(120) mounted on the base (110) for receiving the cutting tool(B), the holder(120) having a main body (130), an arc receiving post (140), and a guiding block (131), the main body (130) having a first abutting portion (132) and a second abutting portion (136), the first abutting portion (132) having a first abutting surface(133) and an embedding concave (135), the first abutting surface(133) abutted against the front rake wall(112), and the embedding portion (113) detachably embedded into the embedding concave (135), the second abutting portion (136) having a second abutting surface(137), and the second abutting surface(137) abutted against the back rake wall(114), the arc receiving post (140) extending projecting from the main body (130), wherein the arc receiving post (140) is correspondingly set into the arc receiving hole(115), and a position limiting groove (142) is formed on the arc receiving post (140) corresponding to the positioning hole(116), and the arc receiving post (140) has at least two side surfaces(1401) and the two side surfaces(1401) are abutted against the two abutted surfaces(1151), and the guiding block (131) is projected corresponding to the cutting tool(B); and
a fastening member(150) fastened in the positioning hole(116) and pressed against the position limiting groove (142).