Cutting device with fastening member

Abstract

A cutting device with a fastening component is used in a ground processing machine, comprising a tool holder and a base, wherein the cutting device comprises at least one fastening component and a locking component, wherein the fastening component and the locking component are used in combination to fix the tool holder and the base together; the cutting device with a fastening component of the present invention comprises a fastening component with an internal thread and a locking component with an external thread, wherein the fastening component can be used in combination with the locking component to fix the tool holder and the base together, and the fastening component whose internal thread has been damaged can be quickly replaced without having to replace the base that has become unusable as a whole, thereby greatly increasing the reliability and service life of the cutting device of the entire quick-change tool holder and saving production costs.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting tools, and in particular relates to a cutting device with a fastening component. Background Art

[0002] The field of use of conventional quick-change tool holder systems is usually in ground preparation equipment and road construction equipment. Generally, they are machines with a driven roller that can rotate about a horizontal axis, on which a plurality of ground preparation tools, such as cutting tools including round-handled picks, are arranged. Such machines include, for example, stabilizers, recyclers and road milling machines, in particular cold milling machines. During working operations, the holders for accommodating cutting tools or round-handled picks are subject to high stresses and extremely high wear, on the one hand due to the broken material in the milling box, and on the other hand due to the high-speed rotation of the round-handled picks. In addition, when the tool breaks, falls off or wears out, the tool holder is worn or destroyed. In order to be able to easily and quickly replace worn or damaged parts of the tool holder, a quick-change tool holder system is required.

[0003] The main components of the quick-change tool holder system are a base and a quick-change tool holder connected to the base component, which is configured to accommodate a ground leveling tool, such as a cutting tool, in particular a round-handled pick. The base component is firmly fastened to the cylindrical outer surface of the milling roller, which is usually mounted horizontally and perpendicular to the working direction of the corresponding construction machine, for example by firmly welding the base to the roller body. The base thus forms an element for connecting the quick-change tool holder system to the roller base body. The base is further used to mount the quick-change tool holder system or is configured to mount the quick-change tool holder system. For this purpose, a quick-change tool holder receptacle is provided on the base, which may include, for example, a suitable receiving hole located on the base of a generally compact construction. The quick-change tool holder also includes relatively compact components. The quick-change tool holder can be mounted upside down on the base and has, for example, corresponding threads, clamping pins and / or screw holes, etc. As a result, a defective quick-change tool holder can be quickly replaced without the need to separate the base and the roller body for this purpose. The quick-change tool holder is also used to accommodate cutting tools, in particular round-handled picks, and therefore also has a corresponding tool receptacle, for example a cutting tool receptacle in the form of a cylindrical receiving channel for accommodating and mounting the cutting tool. The round-handled pick is usually mounted on the quick-change tool holder and can rotate about its cylindrical axis and is fixed without any axial displacement by a suitable clamping device, such as a clamping sleeve. The advantage of the quick-change tool holder system is that if a tool defect occurs, the tool and / or the quick-change tool holder can be selectively replaced without the need for a fixed connection of the base to the roller body, which needs to be loosened and then redone, which is costly.

[0004] Although conventional quick-change tool holder systems have long been proven to be successful in principle, there is still a need for improvement, especially in relation to the replacement of machining tools and / or quick-change tool holders and the reliability and service life of the entire quick-change tool holder system. For example, if the threads on the base are damaged after repeated use, the corresponding fastening bolts will not be able to play a fastening role, i.e. the entire base can no longer be used. Summary of the invention

[0005] The object of the present invention is to provide a cutting device having a fastening component and a fastening component separation design.

[0006] Another object of the present invention is to provide a cutting device with replaceable fastening components and greatly extended service life.

[0007] In order to solve the above technical problems, the present invention discloses a cutting device with a fastening component, which is used in a ground processing machine, including a tool holder and a base. The cutting device includes at least one fastening component and a locking component, and the fastening component and the locking component are used in combination to fix the tool holder and the base together.

[0008] Furthermore, the tool holder includes a through hole, a tool mounting portion and an elongated handle portion, wherein the through hole is opened on one side of the upper end surface of the tool holder, the tool mounting portion is arranged on the other side of the upper end surface, and the elongated handle portion is arranged on the bottom of the tool holder away from the through hole;

[0009] The base includes a mounting hole, a transverse mounting portion and a receiving portion. The mounting hole is located corresponding to the through hole. The transverse mounting portion is a blind hole processed transversely on a side wall of the base near the mounting hole. The receiving portion is a concave surface adapted to the shape of the elongated handle. A countersunk hole with an enlarged diameter is processed on the upper portion of the through hole.

[0010] Furthermore, the locking component is a bolt, the fastening component is a cylinder, and the fastening component includes a head, a threaded hole, a disassembly portion and a tail portion arranged in sequence; the threaded hole and the locking component match, the fastening component is arranged in the horizontal mounting portion, and the locking component passes through the threaded hole and is fixed to the fastening component.

[0011] Furthermore, the angle between the axis of the threaded hole and the axis of the fastening component is 85°-95°, preferably 90°.

[0012] Furthermore, the central axis of the through hole is arranged in parallel with the central axis of the elongated handle.

[0013] Furthermore, the tool mounting portion includes a tool mounting surface of the head and a plurality of wear indicating grooves on the outer side wall.

[0014] Furthermore, the tool mounting portion is inclined toward a side away from the through hole, and an angle between a central axis of the tool mounting portion and a central axis of the extended handle is 130°-140°.

[0015] Furthermore, the elongated handle is in a semi-conical or parabolic shape with a diameter gradually decreasing from top to bottom.

[0016] Furthermore, the disassembly portion is a groove, and the groove is preferably annular.

[0017] Furthermore, the base body has a raised portion at one end near the accommodating portion, and the raised portion includes a frontmost surface 1, a surface 2 and a surface 3 arranged on both sides of the surface 1, and a surface 4 and a surface 5 arranged at an angle;

[0018] A working surface is provided at the end of the tool holder corresponding to the raised part of the base, and the working surface includes discharge surface one, discharge surface two, and discharge surface three. The discharge surface one is at the front, and the discharge surface two and discharge surface three are arranged on both sides of the discharge surface one. The discharge surface one is arranged at an angle to the discharge surface two, and the discharge surface one is arranged at an angle to the discharge surface three.

[0019] The cutting device with the fastening component of the present invention has at least the following advantages:

[0020] The cutting device with a fastening component of the present invention comprises a fastening component with an internal thread and a locking component with an external thread. The fastening component can be used in conjunction with the locking component to fix the tool holder and the base together. In addition, the fastening component whose internal thread has been damaged can be quickly replaced without having to replace the unusable base as a whole, thereby greatly increasing the reliability and service life of the cutting device of the entire quick-change tool holder and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an overall view of the left rear side of the cutting device of the present invention;

[0022] Figure 2 is a left rear exploded view of the cutting device of the present invention;

[0023] Figure 3 is a right front exploded view of the cutting device of the present invention;

[0024] Figure 4 is a left rear bottom perspective view of a knife holder of a cutting device of the present invention;

[0025] Figure 5 is a left side elevation view of a knife holder of a cutting device of the present invention;

[0026] Figure 6 is a bottom elevation view of a tool holder of a cutting device of the present invention;

[0027] Figure 7 The knife holder of the cutting device of the present invention is Figure 6 A front and side view of the body cut along the median plane M;

[0028] Figure 8 is a top elevation view of a base body of the cutting device of the present invention;

[0029] Fig. 9 The base of the cutting device of the present invention is Figure 8 A front and side view cut through the median plane M1;

[0030] Fig.10 is a front overall view of the cutting device of the present invention;

[0031] Fig.11 The cutting device of the present invention is Fig.10 Frontal and lateral view of the middle AA section;

[0032] Fig.12 The cutting device of the present invention is Fig.10 A front side view cut along AA without components 4 and 5;

[0033] Fig.13 It is a partial cross-sectional view and a front view of the fastening component of the cutting device of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below through examples so that those skilled in the art can implement the invention with reference to the description.

[0035] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0036] like Figure 1-13 As shown, Figure 1 The cutting device 1 is shown, which is composed of a base 3, a tool holder 2, a locking component 4 and a fastening component 5. The tool holder 2 is replaceably connected to the base 3. A connecting surface 3.1 is provided below the base 3, and the connecting surface 3.1 is in a concave arched state, wherein the size of the arch is defined according to the outer diameter of the milling drum. Therefore, the base 3 can be mounted on the outer surface of the milling drum with the connecting surface 3.1 and fixedly welded thereto.

[0037] like Figures 2 to 4As shown, the tool holder 2 is installed in the receiving portion 30 of the base 3 by means of the extended handle 202, the fastening component 5 is inserted into the horizontal mounting portion 33 of the base 3, and then the locking component 4, which can be a screw, is passed through the through hole 204 of the tool holder 2 and the horizontal mounting portion 33 of the base 3. After the threaded hole 50 of the fastening component 5 is properly adjusted to be aligned with the external thread 41 of the locking component 4, a tool such as a wrench can be used to insert it into the adapter hole 40 of the locking component 4, and then the fastening component 5 is inserted into the horizontal mounting portion 33 of the base 3. As the needle rotates, the locking component 4 will gradually be screwed into the threaded hole 50 of the fastening component 5. Under appropriate torque, the locking surface 42 of the locking component 4 will eventually fit tightly with the countersunk surface 205.1 of the tool holder 2. At this time, the pressing surface 28 of the tool holder 2 and the force-bearing surface 37 of the base 3 fit together; the pressure surface 29 of the tool holder 2 fits with the abutment surface 36 of the base 3; the transition surface 200 of the tool holder 2 does not fit with the auxiliary surface 38 of the base 3, and a reasonable gap is maintained.

[0038] Also like Figure 2 Figure 3 As shown, there is a working surface in front of the main body 210 of the tool holder 2, including a discharge surface 1 25, a discharge surface 26, and a discharge surface 3 27. The discharge surface 1 25 is at the front, and the discharge surface 1 25 and the discharge surface 2 26 are arranged at an angle; the discharge surface 1 25 and the discharge surface 3 27 are arranged at an angle, and the three form an arrow-shaped geometric shape, which has the function of protecting the substrate 3 and can reduce the cutting resistance during work. The front of the substrate 3 has a raised part, including the frontmost surface 1 301, the surface 2 300 on both sides, the surface 4 302, the surface 5 303, and the surface 3 304, which are also arranged at an angle, so that when multiple substrates 3 are arranged in front and back for welding, there will be a better spatial effect.

[0039] like Figure 4 Figure 6 As shown, the through hole 204 of the tool holder 2 passes through the pressing surface 28, the pressure surface 29 and the transition surface 200; the countersunk hole 205 passes through the transition surface 200 and partially intersects with the pressure surface 29.

[0040] Figure 5 The elongated handle 202 is shown to have a support surface 203 and a central axis L. The support surface 203 extends along the central axis L and in a direction away from the main body 210, and its surface line 206 has an angle a around the central axis. Preferably, the angle a ranges from 5° to 15°. Obviously, the elongated handle 202 forms a cone shape, and it is achievable that its diameter gradually decreases along the V3 direction. In addition, it is connected to the pressing surface 28 through the reinforcement portion 201.

[0041] Also like Figure 5 As shown, the pressing surface 28 and the pressure surface 29 form an angle e. Preferably, the angle e is set to 90°.

[0042] The pressure surface 29 and the transition surface 200 form an angle f. Preferably, the angle f is set to 90°.

[0043] like Figure 7 As shown, there is an angle c between the central axis L0 of the tool mounting portion 22 and the central axis L of the extended shank 202. Preferably, the angle c is in the range of 130°-140°. The main body 210 has a clamping surface 28, which is arranged between the extended shank 202 and the tool mounting portion 22, and there is an angle d between the clamping surface 28 and the central axis L of the extended shank 202. Preferably, the angle d is set to 90°.

[0044] like Figure 6 Figure 7 As shown, the main body 210 includes a pressure surface 29, which is at least partially arranged behind the elongated shank 202 against the second working direction V2, and is transitionally connected to the pressing surface 28 through a fillet 208. In addition, the main body 210 includes a transition surface 200, which is at least partially arranged between the pressure surface 29 and the tool mounting portion 22, and is at least partially arranged behind the elongated shank 202 against the second working direction V2, and is transitionally connected to the pressure surface 29 through a fillet 209. The pressure surface 29 is configured as an arc surface with a radius of R1, and its center O1 is on the median plane M of the tool holder 2, and coincides with the central axis L. Preferably, the size range of R1 is between 50mm and 60mm.

[0045] like Figure 7 As shown, the main body 210 is provided with a through hole 204, which is arranged behind the elongated handle 202 in the direction opposite to the second working direction V2 and penetrates the main body 210. The main body 210 is provided with a countersunk hole 205, which is arranged behind the elongated handle 202 in the direction opposite to the second working direction V2. The through hole 204 and the countersunk hole 205 share a central axis L22, and the countersunk hole 205 is arranged above the through hole 204 in the direction opposite to the third direction V3. Moreover, the central axis L22 is arranged in parallel with the central axis L of the elongated handle 202.

[0046] Another example Figure 7 As shown, the entrance of the tool mounting portion 22 has a tool mounting surface 21, which is the end and abutment surface after the tool is installed. Because the tool rotates at high speed during operation, the tool mounting surface 21 will be gradually worn down as the tool is used. A plurality of wear indicator grooves 20 are provided on the outer circumferential surface of the tool mounting portion 22 to judge the use and wear of the tool mounting surface 21. When the wear indicator grooves 20 are all worn away, a new tool holder 2 must be replaced and installed on the base 3 of the cutting device 1.

[0047] like Figure 8 Fig. 9As shown, the receiving portion 30 of the base 3 has a central axis L1, and the surface element line 32 of the receiving surface 30.1 forms an angle b around L1. It can be seen that the receiving portion 30 forms a conical hollow chamber, and in fact, its diameter gradually decreases in the opposite direction of V3. Preferably, the range of angle b is between 5°-15°. The receiving portion entrance 31 is between the force-bearing surface 37 and the receiving portion 30, the force-bearing surface 37 is connected to the abutting surface 36 through the rounded corner 39, and the abutting surface 36 is connected to the auxiliary surface 38 through the rounded corner 4 39.1. The blind hole 34 contains the central axis L2 and passes through the auxiliary surface 38, the abutting surface 36, and the force-bearing surface 37. The second countersunk hole 35 is coaxially arranged with the blind hole 34 and is arranged above the blind hole 34 in the opposite direction of V3. The horizontal mounting portion 33 contains the central axis L3, which is arranged along the V2 direction. It is preferably provided that L2 and L3 are arranged in a vertical state. The abutment surface 36 is configured as an arc surface with a radius of R2, and its center O2 is on the median plane M1 of the base 3 and coincides with the central axis L1. Preferably, the size range of R2 is between 50 mm and 60 mm.

[0048] like Fig.13 As shown, the fastening component 5 includes a head 52, a tail 54, an outer surface 51, a disassembly portion 53, and a threaded hole 50. In addition, the fastening component 5 has a central axis L5 and is formed around the outer surface 51. At the same time, the threaded hole 50 of the fastening component 5 has a central axis L4. It can be stipulated that there is an angle g between the central axis L4 of the threaded hole 50 and the central axis L5 of the fastening component 5, and the size range of the angle g is between 85°-95°. It is particularly preferably set at 90°. The advantage of this is that on the one hand, it makes mechanical processing easier, and on the other hand, it makes the angle g = angle e = angle f = angle d. According to the principles of engineering mechanics, the clamping force F1 obtained in this way is the maximum.

[0049] On the fastening component 5, the threaded hole 50 is arranged near the head 52 of the fastening component 5. The disassembly portion 53 is located near the tail 54 of the fastening component. And, the disassembly portion 53 is formed by a concave depression, such as an annular groove.

[0050] like Fig.10 The assembled cutting device 1 is cut in the direction of AA to obtain a full cross-sectional view of the tool holder 2, the base 3, and the fastening component 5. Fig.11The tool holder 2 is fixed in the receiving portion 30 of the base 3 by means of the elongated shank 202, and if the angle a=angle b is set, then the central axis L1 of the receiving portion 30 coincides with the central axis L of the elongated shank 202. As mentioned above, the cylindrical fastening component 5 has a threaded hole 50, which acts as a nut. When the locking component 4 is tightened, a clamping force F1 in the direction of V3 is generated. Under the action of the clamping force F1, its locking surface 42 is tightly fitted with the countersunk surface 205.1 of the tool holder 2. At the same time, the outer surface 51 of the fastening component 5 tightly presses the inner surface of the horizontal mounting portion 33 to form a surface-to-surface tangent structure. It can be seen that due to the action of the clamping force F1, a force F is generated, which is generated along the central axis L of the elongated shank 202, and the support surface 203 and the receiving surface 30.1 of the receiving portion 30 form a conical matching relationship. The advantage of this is that under the action of the force in the F direction, the conical fit forms an interference fit relationship, and the tightness between the support surface 203 and the receiving surface 30.1 of the receiving portion 30 increases as the force in the V3 direction increases. This allows the support surface 203 of the extended handle 202 to fully mesh with the receiving surface 30.1 of the receiving portion 30. At the same time, the pressing surface 28 and the force-bearing surface 37; the pressure surface 29 and the abutment surface 36 are also tightly fitted, and the transition surface 200 and the auxiliary surface 38 are set to maintain a small gap, such as 0.5mm. This is because there is a processing tolerance, and it is difficult to achieve the simultaneous contact between the pressing surface 28 and the force-bearing surface 37; the transition surface 200 and the auxiliary surface 38, so only the pressing surface 28 with a larger contact area and the force-bearing surface 37 are allowed to contact together.

[0051] Also like Fig.11 As shown, when the tool holder 2 is to be disassembled, the fastening component 5 is first unscrewed counterclockwise. Considering that when the cutting device 1 is actually working, fine debris and residues on the road surface will enter the gap between the outer surface 51 of the fastening component 5 and the inner surface of the horizontal mounting portion 33, blocking the fastening component 5, an annular groove is provided on the tail 54 of the fastening component 5 exposed from the base 3 to form a disassembly portion 53. In this way, the disassembly portion 53 can be pried with the flat mouth of a flat tool, such as a flat-bladed screwdriver, so that the fastening component 5 can be easily taken out against the direction V2.

[0052] like Fig.10 The assembled cutting device 1 is cut in the direction of DD to obtain a full cross-sectional view of the tool holder 2, the base 3, the locking component 4 and the fastening component 5. Fig.12, set R1=R2, then the center O1 of the pressure surface 29 coincides with the center O2 of the abutment surface 36, that is, the central axis L1 of the accommodating portion 30 coincides with the central axis L of the extended handle 202, so the tool holder 2 can freely rotate around the center O1 / O2 360°. This is conducive to the precision control of machining, and it is also faster and more convenient to disassemble the tool holder 2. When disassembling the tool holder 2, if the pressing surface 28 and the force surface 37; the pressure surface 29 and the abutment surface 36 are tightly bonded together due to rust caused by the spraying of cooling water when the cutting device 1 is working, you can use a hammer to knock the side discharge surface 4 26.1 and the discharge surface 5 27.1 of the tool holder 2 back and forth along the V direction and the V1 direction to rotate the tool holder 2, and you can easily release the rust adhesion.

[0053] from Figure 6 Figure 7 It can be seen that three auxiliary disassembly parts 23 are provided on the tool holder 2, which are arranged respectively between the pressing surface 28 and the discharging surface 26.1, the pressing surface 28 and the discharging surface 27.1, and the pressing surface 28 and the discharging surface 25, and are recessed into the main body 210 in the opposite direction of V3. The auxiliary disassembly parts 23 are used as spare parts for disassembling the tool holder 2. A pry bar, such as a flat-blade screwdriver, can be used to insert into the auxiliary disassembly parts 23, and the force-bearing surface 37 of the base body 3 is used to form a lever principle to pry the three auxiliary disassembly parts 23 in sequence. Thus, the purpose of disassembling the tool holder 2 is achieved.

[0054] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A cutting device (1) with a fastening component, used for a floor processing machine, comprising a tool holder (2) and a base (3), characterized in that: The cutting device (1) comprises at least one fastening component (5) and a locking component (4), wherein the fastening component (5) and the locking component (4) are used in cooperation with each other to fix the tool holder (2) and the base body (3) together; The tool holder (2) comprises a through hole (204), a tool mounting portion (22) and an elongated handle portion (202), wherein the through hole (204) is provided on one side of the upper end surface of the tool holder, the tool mounting portion (22) is provided on the other side of the upper end surface, and the elongated handle portion (202) is provided on a side of the bottom of the tool holder away from the through hole (204); The base (3) comprises a mounting hole (34), a transverse mounting portion (33) and a receiving portion (30); the mounting hole (34) is located corresponding to the through hole (204); the transverse mounting portion (33) is a blind hole processed transversely on a side wall of the base (3) near the mounting hole (34); the receiving portion (30) is a concave surface adapted to the shape of the elongated handle (202); a countersunk hole (205) with an enlarged diameter is processed on the upper portion of the through hole (204); The locking component (4) is a bolt, the fastening component (5) is a cylinder, and the fastening component (5) comprises a head (52), a threaded hole (50), a disassembly portion (53) and a tail (54) which are arranged in sequence; the threaded hole (50) and the locking component (4) match each other, the fastening component (5) is arranged in the transverse mounting portion (33), and the locking component (4) passes through the threaded hole (50) and is fixed to the fastening component (5); The disassembly portion is a groove, and the groove is annular; When the tool holder (2) is disassembled, the tool holder (2) is rotated by means of the extended handle (202).

2. The cutting device with a fastening member according to claim 1, characterized in that The included angle (g) between the axis (L4) of the threaded hole (50) and the axis (L5) of the fastening component (5) is 85°-95°.

3. The cutting device with a fastening member according to claim 2, characterized in that The central axis (L22) of the through hole (204) and the central axis (L) of the elongated handle (202) are arranged in parallel.

4. The cutting device with a fastening member according to claim 1, characterized in that The tool mounting portion (22) comprises a tool mounting surface (21) on the head portion and a plurality of wear indicating grooves (20) on the outer side wall.

5. The cutting device with a fastening member according to claim 4, characterized in that The tool mounting portion (22) is inclined towards a side away from the through hole (204), and an angle between a central axis (L0) of the tool mounting portion (22) and a central axis of the elongated handle (202) is 130°-140°.

6. The cutting device with a fastening member according to claim 5, characterized in that The elongated handle (202) is in a semi-conical or parabolic shape with a diameter that gradually decreases from top to bottom.

7. The cutting device with a fastening member according to claim 1, characterized in that The base body (3) has a raised portion at one end near the receiving portion (30), the raised portion comprising a frontmost surface 1 (301), a surface 2 (300) and a surface 3 (304) arranged on both sides of the surface 1 (301), and a surface 4 (302) and a surface 5 (303) arranged at an angle; A working surface is provided at one end of the tool holder (2) corresponding to the raised portion of the base (3), and the working surface comprises a first discharge surface (25), a second discharge surface (26), and a third discharge surface (27). The first discharge surface (25) is at the front, and the second discharge surface (26) and the third discharge surface (27) are arranged on both sides of the first discharge surface (25). The first discharge surface (25) and the second discharge surface (26) are arranged at an angle, and the first discharge surface (25) and the third discharge surface (27) are arranged at an angle.

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