WO2021120500A1

WO2021120500A1 - Cutting device provided with fastening component

Info

Publication number: WO2021120500A1
Application number: PCT/CN2020/088873
Authority: WO
Inventors: 苗祥; 秦鹏程
Original assignee: 苏州五元素机械制造有限公司
Priority date: 2019-12-17
Filing date: 2020-05-07
Publication date: 2021-06-24
Also published as: CN110983927A

Abstract

A cutting device (1) that is provided with a fastening component, the device comprising a cutter holder (2), a base body (3), at least one fastening component (5) and a locking component (4), wherein the fastening component (5) and the locking component (4) are used to fix the cutter holder (2) and the base body (3) together by means of cooperation of an internal thread (50) and external thread (41) that the fastening component (5) and the locking component (4) have. The cutting device (1) can quickly replace a fastening component (5) that has a damaged internal thread (50) without needing to replace the base body (3), which increases the reliability and service life of the cutting device (1), and saves on costs.

Description

Cutting device with fastening parts

Technical field

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

Background technique

Conventional quick-change tool holder systems are usually used in ground preparation equipment and road construction equipment. Generally, it relates to a machine with a driven roller that can rotate around a horizontal axis. A plurality of ground preparation tools are arranged on the driven roller, such as cutting tools including round handle picks. Such machines include, for example, stabilizers, recirculators and road milling machines, especially cold milling machines. During the operation, the cage used to hold the cutting tool or the round shank pick is subjected to high stress 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 rotating circle The reason for the handle pick. In addition, when the tool breaks, falls off, or is worn, the tool holder is worn or destroyed. In order to be able to easily and quickly replace the worn or damaged parts of the tool holder, a quick-change tool holder system is required.

The main components of the quick-change tool holder system are the base and the quick-change tool holder connected to the base member, and the quick-change tool holder is configured to accommodate ground preparation tools, such as cutting tools, especially round handle picks. The base member is firmly fastened to the cylindrical outer surface of the milling roller, which is usually installed horizontally and perpendicularly to the working direction of the corresponding construction machine, for example by firmly welding the base to the roller body . So the base forms an element for coupling the quick change tool holder system to the roller base body. The base is further used to install a quick-change tool holder system or is configured to install a quick-change tool holder system. To this end, a quick-change tool holder receptacle is provided on the base, which may include, for example, a suitable receiving hole 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 installed upside down on the base, and has, for example, corresponding threads, clamping pins, and/or screw holes. As a result, defective quick-change tool holders 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 for accommodating cutting tools, especially round handle picks, so it will also have corresponding tool insertion holes, for example, a cutting tool insertion hole arranged in the form of a cylindrical receiving channel for receiving and installing cutting tools. Round shank picks are usually mounted on a quick-change tool holder and can rotate around their cylindrical axis, and are fixed by a suitable clamping device, such as a clamping sleeve, without any axial displacement. The advantage of the quick-change tool holder system is that if the tool is defective, the tool and/or the quick-change tool holder can be selectively replaced without fixing the base to the roller body, and the fixed connection needs to be loosened first Rework is costly.

Although the conventional quick-change tool holder system has been proved to be successful in principle, it still needs to be improved. This especially involves the replacement of processing 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 cannot be used for fastening, that is, the entire base can no longer be used.

Summary of the invention

The object of the present invention is to provide a cutting device with a fastening component and a separation design of fastening components.

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

In order to solve the above-mentioned technical problems, the present invention discloses a cutting device 1 with fastening components, which is used in a ground processing machine. The cutting device 1 includes a tool holder 2 and a base 3. The cutting device 1 includes at least one fastening component 5 and a locking device. Component 4, the fastening component 5 and the locking component 4 are used in conjunction to fix the tool holder 2 and the base 3 together.

Further, the tool holder (2) includes a through hole (204), a tool mounting portion (22), and an elongated shank portion (202). The through hole (204) is opened on one side of the upper end surface of the tool holder. The mounting portion (22) is arranged on the other side of the upper end surface, and the elongated handle portion (202) is arranged on the side of the bottom of the tool holder away from the through hole (204);

The base body (3) includes a mounting hole (34), a horizontal mounting portion (33), and a receiving portion (30). The position of the mounting hole (34) corresponds to the through hole (204), and the horizontal mounting portion (33) is a blind hole that is machined transversely on a side wall of the base body (3) near the mounting hole (34), and the receiving portion (30) is a concave surface adapted to the shape of the elongated handle (202); A counterbore (205) with enlarged diameter is machined on the upper part of the through hole (204).

Further, the locking component 4 is a bolt, the fastening component 5 is a cylinder, and the fastening component 5 includes a head 52, a threaded hole 50, a dismounting part 53, and a tail 54 arranged in sequence; the threaded hole 50 Matching with the locking component 4, the fastening component 5 is arranged in the horizontal mounting portion 33, and the locking component 4 is fixed to the fastening component 5 through the threaded hole 50.

Further, 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°, preferably 90°.

Further, the central axis L22 of the through hole 204 and the central axis L of the elongated handle 202 are in a parallel arrangement relationship.

Further, the tool mounting portion 22 includes a tool mounting surface 21 of the head and a plurality of wear indicating grooves 20 on the outer side wall.

Further, the tool mounting portion 22 is inclined to the side away from the through hole 204, and the angle between the central axis L0 of the tool mounting portion 22 and the central axis of the elongated shank 202 is 130°-140°.

Further, the elongated handle 202 has a semi-conical or parabolic shape with a diameter gradually decreasing from top to bottom.

Further, the dismounting part is a groove, and the groove is preferably ring-shaped.

Further, the base body 3 has a raised portion near one end of the receiving portion 30, and the raised portion includes a frontmost surface 301, a surface 300 and a surface 304 provided on both sides of the surface 301, and the surface 302 and the surface 303 are arranged at an angle;

The tool holder 2 has a working surface at one end corresponding to the raised part of the base 3. The working surface includes a discharge surface 25, a discharge surface 26, and a discharge surface 27. The discharge surface 25 is at the forefront. The discharge surface 26 and the discharge surface 27 are arranged on both sides of the discharge surface 25, the discharge surface 25 and the discharge surface 26 are arranged at an angle, and the discharge surface 25 and the discharge surface 27 are arranged at an angle.

The cutting device with fastening components of the present invention has at least the following advantages:

The cutting device with a fastening component of the present invention includes 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 body. Together, it can quickly replace the fastening components whose internal threads have been damaged, without having to replace the unusable base as a whole, which greatly increases the reliability and service life of the cutting device of the entire quick-change tool post, and saves production. cost.

Description of the drawings

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

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

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

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

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

Figure 6 is a bottom front view of the knife holder of the cutting device of the present invention;

FIG. 7 is a front side view of the knife holder of the cutting device of the present invention, which is cut according to the midpoint plane M of FIG. 6;

Figure 8 is a top front view of the base of the cutting device of the present invention;

Fig. 9 is a front side view of the base body of the cutting device of the present invention, cut along the midpoint plane M1 of Fig. 8;

Figure 10 is a front overall view of the cutting device of the present invention;

Figure 11 is a front side view of the cutting device of the present invention, cut along A-A in Figure 10;

Fig. 12 is a front side view of the cutting device of the present invention, cut according to A-A in Fig. 10 without

parts

4 and 5;

Figure 13 is a partial cross-sectional view and a front view of the fastening component of the cutting device of the present invention;

Detailed ways

Hereinafter, the present invention will be further described in detail through examples, so that those skilled in the art can implement it with reference to the text of the description.

It should be understood that terms such as "having", "including" and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

As shown in Figs. 1-13, Fig. 1 shows a cutting device 1 composed of a base 3, a knife holder 2, a locking member 4, and a fastening member 5. The knife holder 2 is replaceably connected with the base 3. There is a connecting surface 3.1 below the base body 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 body 3 can be mounted on the outer surface of the milling drum with the connecting surface 3.1 and fixedly welded to it.

As shown in Figures 2 to 4, the tool holder 2 is installed in the receiving portion 30 of the base body 3 by means of the elongated handle 202, the fastening component 5 is inserted into the blind hole 33 of the base body 3, and then the locking component 4 is inserted. It can be a screw, which passes through the through hole 204 of the tool holder 2 and the blind hole 34 of the base body 3. After the internal thread 50 of the fastening component 5 is aligned with the external thread 41 of the locking component 4, tools such as a wrench can be used Insert it into the fitting hole 40 of the locking component 4 and rotate it clockwise. The locking component 4 will gradually be screwed into the internal thread 50 of the fastening component 5. Under an appropriate torque, the final locking component 4 will be locked. The surface 42 will be closely attached to the counterbore surface 205.1 of the tool holder 2. At this time, the pressing surface 28 of the tool holder 2 and the force-receiving surface 37 of the base 3 are in contact with each other; the pressure surface 29 of the tool holder 2 and the base 3 The abutment surface 36 fits; the transition surface 200 of the tool holder 2 does not fit the auxiliary surface 38 of the base 3, and a reasonable gap is maintained.

As also shown in Figure 2 and Figure 3, there is a working surface in front of the main body 210 of the tool holder 2, including discharge 5, discharge 6, and discharge 7. Discharge 5 is at the forefront, and discharge 5 and discharge 6 form a clamp Angle arrangement; the discharge 5 and the discharge 7 form an angular arrangement, 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 base 3 has a raised area, including the frontmost surface 301, the surfaces 300 on both sides, the

surfaces

302, 303, and 304, which are also arranged in an angled state. It can be better when multiple bases 3 are arranged in front and behind for welding. The space effect.

As shown in FIG. 4 and FIG. 6, 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 counterbore 205 passes through the transition surface 200 and partially intersects the pressure surface 29.

5 shows that the elongated handle 202 has a supporting surface 203 and a central axis L, the supporting surface 203 extends obliquely along the central axis L and away from the main body 210, and the surface element line 206 has an angle a around the central axis. Preferably, the range of the angle a is between 5°-15°. Obviously, the elongated handle 202 forms a cone shape, and it can be realized that its diameter gradually decreases along the V3 direction. In addition, it is connected to the pressing surface 28 through the reinforcing part 201.

As also shown in Fig. 5, the pressing surface 28 and the pressing surface 29 form an included angle e, and preferably, the angle e is set to 90°.

The pressure surface 29 and the transition surface 200 form an included angle f, and preferably, the angle f is set to 90°.

As shown in Figure 7, there is an included angle c between the central axis L0 of the tool mounting portion 22 and the central axis L of the elongated shank 202. Preferably, the range of the angle c is between 130° and 140°, and the main body 210 has The pressing surface 28 is arranged between the elongated shank 202 and the tool mounting portion 22, and there is an included angle d between the pressing surface 28 and the central axis L of the elongated shank 202, preferably, the angle d is set to 90°.

As shown in FIG. 6 and FIG. 7, the main body 210 includes a pressure surface 29, which is at least partially arranged behind the elongated handle 202 against the second working direction V2, and is transitionally connected with the pressing surface 28 through rounded corners 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 portion 202 against the second working direction V2, and The pressure surface 29 is transitionally connected by rounded corners 209. The pressure surface 29 is set as a circular arc surface with a radius of R1, and its center O1 is on the midpoint plane M of the tool holder 2 and coincides with the center axis L. Preferably, the size of R1 is in the range of 50mm-60mm. between.

As shown in FIG. 7, the main body 210 is provided with a through hole 204 which is arranged behind the elongated handle 202 and penetrates the main body 210 opposite to the second working direction V2. The main body 210 is provided with a counterbore 205, which is arranged behind the elongated handle 202 in a direction opposite to the second working direction V2. The through hole 204 and the counterbore 205 share a central axis L22, and the counterbore 205 is arranged above the through hole 204 against the third direction V3. In addition, the central axis L22 and the central axis L of the elongated handle 202 are in a parallel arrangement relationship.

As shown in FIG. 7, the entrance of the tool mounting portion 22 has a tool mounting surface 21, which is the termination and abutting surface after the tool is installed. Because of the high-speed rotation of the tool during operation, the tool mounting surface 21 will gradually be worn less as the tool is used. A number of wear indicating grooves 20 are provided on the outer circumferential surface of the tool mounting portion 22 to determine the tool mounting surface 21. When the wear indicator grooves 20 are worn out, a new tool holder 2 must be replaced and installed on the base 3 of the cutting device 1.

As shown in FIG. 8 and FIG. 9, the receiving portion 30 of the base body 3 has a central axis L1, and the surface element line 32 of the receiving surface 30.1 forms an included angle b around L1. It can be seen that the receiving portion 30 forms a conical hollow cavity. The chamber, in fact, its diameter gradually decreases against the direction of V3. Preferably, the range of the included angle b is between 5° and 15°. The receiving portion entrance 31 is between the force receiving surface 37 and the receiving portion 30, the force receiving surface 37 and the abutting surface 36 are connected by rounded corners 39, the abutting surface 36 and the auxiliary surface 38 are connected by rounded corners 39.1, and the blind hole 34 Containing a central axis L2, and passing through the auxiliary surface 38, the abutting surface 36, and the force-receiving surface 37, the countersunk hole 35 is coaxially arranged with the blind hole 34, and is arranged above the blind hole 34 against the direction V3. The blind hole 33 contains a central axis L3, which is arranged along the direction of V2. It is preferably provided that L2 and L3 are arranged in a vertical state. The abutment surface 36 is set as a circular arc surface with a radius of R2, and its center O2 is on the plane M1 of the base 3 and coincides with the central axis L1. Preferably, the size range of R2 is between 50mm and 60mm. .

As shown in FIG. 13, the fastening component 5 includes a head 52, a tail 54, an outer surface 51, a detachment part 53, and an internal thread 50. Also, the fastening member 5 has a central axis L5 and is formed around the outer surface. At the same time, the internal thread 50 of the fastening member 5 has a center axis L4. It can be specified that there is an included angle g between the central axis L4 of the internal thread 50 and the central axis L5 of the fastening component 5, and the size range of the included angle g is between 85° and 95°. It is particularly preferred to set at 90°. This has the advantage of making machining easier on the one hand, and making the included angle g = included angle e = included angle f = included angle d. According to the principles of engineering mechanics, the clamp obtained in this way The tightening force F1 is the maximum.

On the fastening component 5, the internal thread 50 is arranged on the head 52 of the fastening component 5. The detachment part 53 is located at the tail part 54 close to the fastening part. Also, the detachment portion 53 is formed by a concave recessed portion, such as an annular groove.

The assembled cutting device 1 is cut in the direction of A-A in FIG. 10 to obtain a full cross-sectional view 11 of the blade holder 2, the base 3, and the fastening member 5. The tool holder 2 is fixed in the accommodating portion 30 of the base body 3 by means of the elongated handle 202, and if the included angle a = the included angle b is set, then the central axis L1 of the accommodating portion 30 and the central axis L of the elongated handle 202 As mentioned above, the cylindrical fastening component 5 has an internal thread 50, which acts as a nut. When the locking component 4 is tightened, a clamping force F1 in the V3 direction is generated. Under the action, the locking surface 42 closely fits with the counterbore surface 205.1 of the tool holder 2, and at the same time, the outer circular surface 51 of the fastening component 5 tightly presses the inner surface of the blind hole 33 to form a surface and an inner surface. It can be seen that due to the clamping force F1, a force F is generated, which is generated along the central axis L of the elongated handle 202. The supporting surface 203 and the receiving surface 30.1 of the receiving portion 30 form a tapered shape. Cooperation relationship. The advantage of this is that under the action of the force in the F direction, the tapered fit forms an interference fit relationship, and the fastening between the supporting surface 203 and the receiving surface 30.1 of the receiving portion 30 increases with the force in the V3 direction. Big and increase. This makes the supporting surface 203 of the elongated handle 202 completely mesh with the receiving surface 30.1 of the receiving portion 30. At the same time, the pressing surface 28 and the force receiving surface 37; the pressing surface 29 and the abutting surface 36 are also closely attached to each other. The transition surface 200 and the auxiliary surface 38 are set to maintain a small gap, such as 0.5 mm. This is because there are processing tolerances. It is difficult to realize the pressing surface 28 and the force-receiving surface 37; the transition surface 200 and the auxiliary surface 38 are difficult to work together at the same time, so only the pressing surface 28 with a larger bonding area is used. It is attached to the force-bearing surface 37.

Also as shown in Figure 11, when the tool holder 2 is to be disassembled, the fastening component 4 should be screwed out counterclockwise. Considering that the cutting device 1 is actually working, there will be fine debris and residues from the road entering the fastening component 5 In the gap between the outer circular surface 51 and the inner surface of the blind hole 33, the fastening component 5 is blocked. Therefore, an annular groove 53 is provided on the tail 54 of the fastening component 5 to expose the base 3, so that a flat tool, such as A flat-blade screwdriver uses a flat opening to pry the annular groove 53, and the fastening component 5 can be easily taken out against the V2 direction.

Cut the assembled cutting device 1 in the direction of DD as shown in Figure 10 to obtain a full cross-sectional view 12 of the tool holder 2, the base 3, the locking component 4 and the fastening component 5. Set R1 = R2, then the center of the pressure surface 29 O1 coincides with the center O2 of the abutting surface 36, that is, the central axis L1 of the receiving portion 30 coincides with the central axis L of the elongated handle 202. Therefore, the tool holder 2 can freely rotate 360° around the center O1/O2. This is conducive to the precision control of machining, and at the same time, it is faster and more convenient to disassemble the tool holder 2. When disassembling the tool holder 2, if the pressing surface 28 and the force receiving surface 37; the pressure surface 29 and the abutting surface 36 are because of the cutting device 1 The reason why the cooling water is sprayed during work, which causes the surface to be rusted and tightly bonded together, you can use a hammer to strike the side rows of the tool holder 2 back and forth along the V direction and the V1 direction. The material surface 26.1 The material surface 27.1 causes the tool holder 2 to rotate, and the adhesive force of rust can be easily released.

It can be seen from Fig. 6 and Fig. 7 that three disassembly parts 23 are provided on the tool holder 2, which are respectively arranged on the pressing surface 28 and the discharge surface 26.1, the pressing surface 28 and the discharge surface 27.1, and the pressing surface 28 and the discharge surface. Between the surfaces 25 and recessed into the main body 210 against the direction of V3, the detachment part 23 is used as a spare part for detaching the tool holder 2. A crowbar, such as a flat-blade screwdriver, can be used to insert into the detachment part 23 and borrow the base body 3. The force-receiving surface 37 forms the principle of leverage to pry the three dismounting parts 23 in sequence. In this way, the purpose of disassembling the tool holder 2 is achieved.

Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

A cutting device (1) with fastening components, used in a ground processing machine, comprising a tool holder (2) and a base body (3), characterized in that: the cutting device (1) includes at least one fastening component (5) ) And a locking component (4), and the fastening component (5) and the locking component (4) are used together to fix the tool holder (2) and the base body (3) together.
The cutting device with fastening components according to claim 1, wherein the knife holder (2) includes a through hole (204), a tool mounting portion (22) and an elongated handle (202), and the through hole (204) The hole (204) is opened 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 shank portion (202) is provided at the bottom of the tool holder away from the through hole (204). side;

The base body (3) includes a mounting hole (34), a horizontal mounting portion (33), and a receiving portion (30). The position of the mounting hole (34) corresponds to the through hole (204), and the horizontal mounting portion (33) is a blind hole that is machined transversely on a side wall of the base body (3) near the mounting hole (34), and the receiving portion (30) is a concave surface adapted to the shape of the elongated handle (202); A counterbore (205) with enlarged diameter is machined on the upper part of the through hole (204).
The cutting device with a fastening component according to claim 2, wherein the locking component (4) is a bolt, the fastening component (5) is a cylinder, and the fastening component (5) It includes a head (52), a threaded hole (50), a dismounting part (53) and a tail (54) arranged in sequence; the threaded hole (50) matches the locking part (4), and the fastening part (5) is arranged at In the horizontal mounting portion (33), the locking component (4) passes through the threaded hole (50) and is fixed to the fastening component (5).
The cutting device with a fastening component according to claim 3, wherein 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°, preferably 90°.
The cutting device with fastening components according to claim 4, characterized in that the central axis (L22) of the through hole (204) and the central axis (L) of the elongated handle (202) are in a parallel arrangement relationship .
The cutting device with fastening components according to claim 2, characterized in that the tool mounting part (22) comprises a tool mounting surface (21) of the head and a plurality of wear indicating grooves (20) on the outer side wall.
The cutting device with fastening components according to claim 6, characterized in that the tool mounting portion (22) is inclined to the side away from the through hole (204), and the central axis (L0) of the tool mounting portion (22) The included angle with the central axis of the elongated handle (202) is 130°-140°.
The cutting device with fastening components according to claim 7, characterized in that the elongated handle (202) has a semi-conical or parabolic shape with a diameter gradually decreasing from top to bottom.
The cutting device with fastening components according to claim 3, wherein the detaching part is a groove, and the groove is preferably ring-shaped.
The cutting device with fastening components according to claim 2, characterized in that, the base body (3) has a protruding part at one end near the receiving part (30), and the protruding part includes the frontmost surface (301). The surfaces (300) and (304) on both sides of the surface (301), and the surfaces (302) and (303) are arranged at an angle;

The tool holder (2) is provided with a working surface at one end corresponding to the raised part of the base body (3), and the working surface includes a discharge surface (25), a discharge surface (26), and a discharge surface (27). The discharge surface (25) is at the forefront. The discharge surface (26) and the discharge surface (27) are arranged on both sides of the discharge surface (25). The discharge surface (25) and the discharge surface (26) are It is arranged at an angle, and the discharge surface (25) and the discharge surface (27) are arranged at an angle.