CN110983927A

CN110983927A - Cutting device with fastening means

Info

Publication number: CN110983927A
Application number: CN201911301334.1A
Authority: CN
Inventors: 苗祥; 秦鹏程
Original assignee: Suzhou Wuyuansu Machinery Manufacturing Co ltd
Current assignee: Suzhou Wuyuansu Machinery Manufacturing Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-04-10
Also published as: WO2021120500A1

Abstract

A cutting device with a fastening means for a ground working machine, comprising a tool holder and a base body, the cutting device comprising at least one fastening means and a locking means, the fastening means and the locking means cooperating to secure the tool holder and the base body together; the cutting device with the fastening part comprises the fastening part with the internal thread and the locking part with the external thread, the fastening part can be matched with the locking part for use, the tool rest and the base body are fixed together, in addition, the fastening part with the damaged internal thread can be quickly replaced without integrally replacing the base body which cannot be used, the reliability and the service life of the cutting device with the quick-change tool rest are greatly improved, and the production cost is saved.

Description

Cutting device with fastening means

Technical Field

The invention belongs to the technical field of cutting tools, and particularly relates to a cutting device with a fastening part.

Background

The field of use of conventional quick-change tool holder systems is generally in land preparation installations and road construction installations. It relates generally to machines having a driven roller rotatable about a horizontal axis, on which a plurality of soil preparation tools, such as cutting tools including round-shank picks, are arranged. Such machines include, for example, stabilizers, recyclers, and road milling machines, particularly cold milling machines. During the working operation, the holders for accommodating the cutting tools or the round shank picks are subjected 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 round shank picks rotating at high speed. Furthermore, when the tool breaks, falls off or wears, 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.

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 for accommodating a soil preparation tool, such as a cutting tool, in particular a round-shank pick. The base part is firmly fastened to the cylindrical outer surface of the milling roller, which is usually mounted horizontally and perpendicularly to the working direction of the respective construction machine, for example by firmly welding the base to the roller body. The base forms an element for coupling the quick-change tool holder system to the roller base body. The base is further used or configured for mounting a quick-change tool holder system. For this purpose, a quick-change tool holder receptacle is provided on the base, which may comprise, for example, a suitable receiving bore in a generally compactly constructed base. The quick-change tool holder also comprises relatively compact elements. The quick-change tool holder can be mounted upside down on the base and has, for example, corresponding threads, clamping pins and/or threaded holes or the like. It is thus possible to quickly replace a defective quick-change tool holder without the need to separate the base and the roller body for this purpose. The quick-change tool holder is also intended to receive a cutting tool, in particular a round-shank pick, and may therefore also have a corresponding tool receptacle, for example in the form of a cylindrical receiving channel provided for receiving and mounting a cutting tool. The round-shank pick is usually mounted on a quick-change tool holder and is rotatable about its cylindrical axis and is secured against any axial displacement by suitable clamping means, for example a clamping sleeve. The advantage of the quick-change tool holder system is that if a tool becomes defective, the tool and/or the quick-change tool holder can be selectively replaced without the base being fixedly connected to the roll body, which fixed connection needs to be loosened and then reworked, which is costly.

Although conventional quick-change tool holder systems have proven successful in principle, there is still a need for improvements, which relate in particular to the replacement of the machining tools and/or quick-change tool holders and to the reliability and service life of the entire quick-change tool holder system. For example, if the thread on the base is broken after repeated use, the corresponding fastening bolt cannot perform the fastening function, i.e., the entire base cannot be used any more.

Disclosure of Invention

The invention aims to provide a cutting device with a fastening part and a fastening part separation design.

Another object of the invention is to provide a cutting device with replaceable fastening parts and a substantially prolonged service life.

In order to solve the technical problem, the invention discloses a cutting device 1 with a fastening component, which is used for a ground processing machine and comprises a tool rest 2 and a base body 3, wherein the cutting device 1 comprises at least one fastening component 5 and a locking component 4, and the fastening component 5 and the locking component 4 are matched to be used for fixing the tool rest 2 and the base body 3 together.

Further, the tool rest (2) comprises a through hole (204), a tool mounting part (22) and an elongated handle part (202), the through hole (204) is formed in one side of the upper end face of the tool rest, the tool mounting part (22) is formed in the other side of the upper end face, and the elongated handle part (202) is formed in one side, far away from the through hole (204), of the bottom of the tool rest;

the base body (3) comprises a mounting hole (34), a transverse mounting portion (33) and an accommodating portion (30), the position of the mounting hole (34) corresponds to the through hole (204), the transverse mounting portion (33) is a blind hole which is transversely machined in one side wall of the base body (3) close to the mounting hole (34), and the accommodating portion (30) is a concave surface which is matched with the shape of the elongated handle portion (202); the upper part of the through hole (204) is provided with a counter bore (205) with an enlarged diameter.

Further, 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 detaching part 53 and a tail 54 which are arranged in sequence; the screw hole 50 is matched with the locking component 4, the fastening component 5 is arranged in the transverse mounting part 33, and the locking component 4 passes through the screw hole 50 and is fixed with the fastening component 5.

Furthermore, the axis L4 of the threaded hole 50 is at an angle g of 85 ° to 95 °, preferably 90 °, to the axis L5 of the tightening unit 5.

Further, the central axis L22 of the through hole 204 is in parallel disposed relationship with the central axis L of the elongated handle 202.

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

Further, the tool mounting portion 22 is angled away from the through bore 204 such that the central axis L0 of the tool mounting portion 22 is at an angle of 130-140 degrees to the central axis of the elongated shank 202.

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

Further, the detaching part is a groove, and the groove is preferably annular.

Furthermore, one end of the base body 3 close to the accommodating part 30 is provided with a raised part, the raised part comprises a frontmost surface 301,

surfaces

300 and 304 arranged on two sides of the surface 301, and the

surfaces

302 and 303 are arranged at an included angle;

the corresponding one end in

knife rest

2 and 3 uplift positions of base member is equipped with the working face, the working face is including arranging charge level 25, row charge level 26, row charge level 27, it is at forefront to arrange charge level 25, arrange charge level 26, row charge level 27 and locate row charge level 25 both sides, arrange that charge level 25 is the contained angle with row charge level 26 and arrange, arrange that charge level 25 is the contained angle with row charge level 27 and arrange.

The cutting device with the fastening component has at least the following advantages:

the cutting device with the fastening part comprises the fastening part with the internal thread and the locking part with the external thread, the fastening part can be matched with the locking part for use, the tool rest and the base body are fixed together, in addition, the fastening part with the damaged internal thread can be quickly replaced without integrally replacing the base body which cannot be used, the reliability and the service life of the cutting device with the quick-change tool rest are greatly improved, and the production cost is saved.

Drawings

FIG. 1 is an overall view from the rear left side of the cutting device of the present invention;

FIG. 2 is a left rear exploded view of the cutting apparatus of the present invention;

FIG. 3 is a right side front exploded view of the cutting apparatus of the present invention;

FIG. 4 is a bottom perspective left rear view of the blade carrier of the cutting device of the present invention;

FIG. 5 is a left side elevational view of the blade carrier of the cutting device of the present invention;

FIG. 6 is a bottom elevational view of the blade carrier of the cutting device of the present invention;

FIG. 7 is a front side view of the blade carrier of the cutting device of the present invention taken along the bisecting plane M of FIG. 6;

FIG. 8 is a top elevational view of the base of the cutting device of the present invention;

FIG. 9 is a front side view of the base of the cutting device of the present invention taken along bisecting plane M1 of FIG. 8;

FIG. 10 is a front elevational overall view of the cutting device of the present invention;

FIG. 11 is a front side view of the cutting device of the present invention taken along line A-A of FIG. 10;

FIG. 12 is a front side view of the cutting device of the present invention taken along A-A in FIG. 10 and without

components

4 and 5;

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

Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," when used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1 to 13, fig. 1 shows a cutting device 1 consisting of a base body 3, a tool holder 2, a locking part 4 and a fastening part 5, the tool holder 2 being connected to the base body 3 in an exchangeable manner. The lower side of the base body 3 has a connecting surface 3.1, and the connecting surface 3.1 is in a concave, arched state, the size of the arch being defined by the outer diameter of the milling drum. The base body 3 can thus be mounted with the connecting surface 3.1 on the outer surface of the milling drum and fixedly welded thereto.

As shown in fig. 2 to 4, the tool holder 2 is mounted in the receiving portion 30 of the base body 3 by means of the elongated shank 202, the fastening member 5 is inserted into the blind hole 33 of the base body 3, and then the locking member 4, which may be a screw, is inserted through the through hole 204 of the tool holder 2 and the blind hole 34 of the base body 3, and after being properly adjusted such that the internal thread 50 of the fastening member 5 is aligned with the external thread 41 of the locking member 4, the locking member 4 can be inserted into the fitting hole 40 of the locking member 4 by using a tool such as a wrench and rotated clockwise, the locking member 4 will be gradually screwed into the internal thread 50 of the fastening member 5, and at a proper torque, the locking surface 42 of the locking member 4 will be tightly fitted with the counter bore surface 205.1 of the tool holder 2, and at this time, the pressing surface 28 of the tool holder; the pressure surface 29 of the tool holder 2 is attached to the abutment surface 36 of the base body 3; the transition surface 200 of the tool holder 2 does not abut the auxiliary surface 38 of the base body 3 and maintains a reasonable clearance.

As shown in fig. 2 and fig. 3, a working surface is arranged in front of the main body 210 of the tool holder 2, and includes a discharge material 5, a discharge material 6, and a discharge material 7, wherein the discharge material 5 is arranged at the forefront, and the discharge material 5 and the discharge material 6 form an included angle; the discharging materials 5 and the discharging materials 7 form an included angle arrangement, and the three materials form an arrow-shaped geometric shape, so that the base body 3 is protected, and the cutting resistance in the working process can be reduced. The front of the base body 3 is provided with a raised part which comprises a frontmost surface 301, surfaces 300 at two sides,

surfaces

302, 303 and 304, and the raised part is also arranged in an included angle state, so that a better space effect can be achieved when a plurality of bases 3 are arranged in front of and behind for welding.

As shown in fig. 4 and 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; counterbore 205 passes through transition surface 200 and partially intersects pressure surface 29.

Fig. 5 shows that the elongated shank 202 has a bearing surface 203 and a central axis L, the bearing surface 203 extending obliquely along the central axis L and away from the main body 210, and the surface element line 206 thereof having an angle a around the central axis. Preferably, the angle a ranges between 5 ° and 15 °. It is apparent that the elongated shank 202 forms a conical shape, which is achievable with a diameter that decreases in the direction of V3. And is connected to the pressing surface 28 via the reinforcing portion 201.

As also shown in fig. 5, the pressing surface 28 forms an angle e with the pressure surface 29, preferably the angle e is set at 90 °.

The pressure surface 29 forms an angle f with the transition surface 200, preferably the angle f is set to 90 °.

As shown in fig. 7, the central axis L0 of the tool mounting portion 22 is at an angle c, preferably in the range of 130 ° -140 °, to the central axis L of the elongate shank portion 202, the body 210 has a pressing face 28 disposed between the elongate shank portion 202 and the tool mounting portion 22, and the pressing face 28 is at an angle d, preferably 90 °, to the central axis L of the elongate shank portion 202.

As shown in fig. 6 and 7, the main body 210 comprises a pressure surface 29, which is arranged at least partially behind the elongate shank 202 opposite the second working direction V2 and is connected to the pressure surface 28 by a fillet 208. Furthermore, the main body 210 comprises a transition surface 200, which is arranged at least partially between the pressure surface 29 and the tool mounting 22 and is arranged at least partially behind the elongate shank 202 opposite the second working direction V2 and is connected to the pressure surface 29 by a fillet 209 in a transition. The pressure surface 29 is arranged as a circular arc surface with a radius R1 and a centre O1 on the bisecting plane M of the tool holder 2, while coinciding with the central axis L, preferably with a dimension R1 in the range of 50mm-60 mm.

As shown in fig. 7, the body 210 is provided with a through hole 204 disposed behind the elongated shank 202 in the direction opposite to the second working direction V2 and penetrating the body 210. The body 210 is provided with a counter-bore 205 disposed rearward of the elongate handle 202 opposite the second working direction V2. The through-hole 204 and the counter-bore 205 share a central axis L22, and the counter-bore 205 is arranged above the through-hole 204 against the third direction V3. And, central axis L22 is in parallel disposed relationship with central axis L of elongate handle 202.

As also shown in fig. 7, the entrance of the tool mounting portion 22 has a tool mounting surface 21, which is a terminating, abutting surface after the tool is mounted. Because the tool rotates at a high speed during operation, the tool mounting surface 21 will gradually be worn less as the tool is used, and a plurality of wear indicating grooves 20 are provided on the outer circumferential surface of the tool mounting portion 22 for determining the wear of the tool mounting surface 21, and when the wear indicating grooves 20 are worn away, a new tool holder 2 is replaced and mounted on the base body 3 of the cutting device 1.

As shown in fig. 8 and 9, the receptacle 30 of the base body 3 has a central axis L1, the surface element 32 of the receiving surface 30.1 of which forms an angle b around L1, whereby it is known that the receptacle 30 forms a conical hollow chamber, the diameter of which in practice decreases progressively counter to the direction V3. Preferably, the included angle b ranges between 5 ° and 15 °. The receptacle inlet 31 is located between the force-bearing surface 37 and the receptacle 30, the force-bearing surface 37 and the contact surface 36 being connected by a fillet 39, the contact surface 36 and the auxiliary surface 38 being connected by a fillet 39.1, the blind hole 34 having a central axis L2 and passing through the auxiliary surface 38, the contact surface 36, the force-bearing surface 37, the counter bore 35 being arranged coaxially with the blind hole 34 and being arranged above the blind hole 34 opposite to the direction V3. The blind hole 33 has a central axis L3, which is arranged along the direction V2, preferably with L2 and L3 arranged in a perpendicular position. Wherein the abutment surface 36 is provided as a circular arc surface with a radius R2 and a center O2 in the plane M1 of the base body 3 and, at the same time, coincides with the central axis L1, preferably with a dimension of R2 in the range of 50mm to 60 mm.

As shown in fig. 13, the fastening member 5 includes a head portion 52, a tail portion 54, an outer surface 51, a detaching portion 53, and an internal thread 50. Also, the fastening member 5 has a central axis L5, and is formed around the outer surface. Meanwhile, the internal thread 50 of the fastening member 5 has a central axis L4. It can be provided that the central axis L4 of the internal thread 50 forms an angle g with the central axis L5 of the fastening element 5, and that the angle g has a size in the range of 85 ° to 95 °. A particularly preferred setting at 90 ° has the advantage that on the one hand machining is made easier and on the other hand the angle g = angle e = angle F = angle d, the clamping force F1 thus obtained being maximal according to the principles of engineering mechanics.

On the fastening part 5, an internal thread 50 is arranged against a head 52 of the fastening part 5. The removal portion 53 is located adjacent the tail portion 54 of the fastening member. Also, the detaching portion 53 is formed of a concave recess portion, such as an annular groove.

The assembled cutting apparatus 1 is cut in the direction of a-a in fig. 10 to obtain a full sectional view 11 of the holder 2, the base body 3, and the fastening member 5. The tool holder 2 is fixed in the receiving portion 30 of the basic body 3 by means of the elongate shank portion 202, and if the angle a = b is set, the central axis L1 of the receiving portion 30 coincides with the central axis L of the elongate shank portion 202, as previously mentioned, the cylindrical fastening member 5 has an internal thread 50 which acts as a nut, and upon tightening of the locking member 4, a clamping force F1 in the direction V3 is generated, the locking face 42 of which, under the action of the clamping force F1, comes into close abutment with the counterbore face 205.1 of the tool holder 2, while the outer circumferential face 51 of the fastening member 5 presses tightly against the inner face of the blind bore 33, forming a face-to-face tangential configuration, and 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 elongate shank portion 202, the bearing face 203 being in a conical mating relationship with the receiving face 30.1 of the. This has the advantage that under the force in the direction F, the conical fit forms an interference fit, the fastening between the bearing surface 203 and the receiving surface 30.1 of the receiving portion 30 increasing with increasing force in the direction V3. It brings the bearing surface 203 of the elongate shank 202 into full engagement with the receiving surface 30.1 of the receiving portion 30, while at the same time the pressing surface 28 and the force-bearing surface 37; the pressure surface 29 and the abutment surface 36 also abut closely, and the transition surface 200 and the auxiliary surface 38 are arranged to maintain a small clearance, for example 0.5 mm. This is because, due to the presence of machining tolerances, it is necessary to realize the pressing surface 28 and the force-bearing surface 37; the transition surface 200 and the auxiliary surface 38 are difficult to be simultaneously attached, so that only the pressing surface 28 with a larger attachment area is attached to the force bearing surface 37.

As also shown in fig. 11, when the tool holder 2 is to be removed, the fastening part 4 is first screwed out counterclockwise, and considering that in the actual operation of the cutting device 1, fine road particles and debris enter the gap between the outer circumferential surface 51 of the fastening part 5 and the inner surface of the blind hole 33, blocking the fastening part 5, an annular groove 53 is provided on the end portion 54 of the fastening part 5 exposed from the base body 3, so that the fastening part 5 can be easily removed against the direction of V2 by means of a flat tool, such as a flat screwdriver, by levering the annular groove 53 with a flat mouth.

Cutting the assembled cutting device 1 in the direction D-D of fig. 10, a full sectional view 12 of the tool holder 2, the base body 3, the locking part 4 and the tightening part 5 is obtained, with the setting R1= R2, so that the center O1 of the pressure surface 29 coincides with the center O2 of the abutment surface 36, i.e. the center axis L1 of the receiving portion 30 and the center axis L of the elongated shank 202 coincide, so that the tool holder 2 can rotate freely 360 ° around the center O1/O2. This is advantageous for the precision control of the machining, and at the same time, it is faster and more convenient to disassemble the tool holder 2, if the pressing surface 28 and the force-bearing surface 37 are used when disassembling the tool holder 2; when the pressure surface 29 and the abutting surface 36 are tightly bonded together due to the fact that cooling water is sprayed when the cutting device 1 works, and rust is generated between the surfaces, the material surface 27.1 of the side discharging surface 26.1 of the tool rest 2 can be knocked back and forth by an iron hammer along the V direction and the V1 direction to enable the tool rest 2 to rotate, and the rusted bonding force can be easily relieved.

As can be seen from fig. 6 and 7, 3 detaching portions 23 are provided on the tool holder 2, and are respectively arranged between the pressing surface 28 and the discharging surface 26.1, between the pressing surface 28 and the discharging surface 27.1, and between the pressing surface 28 and the discharging surface 25, and are recessed into the main body 210 against the direction of V3, the detaching portions 23 are portions serving as spare detaching tool holders 2, and can be inserted into the detaching portions 23 by using a prying bar, such as a straight screwdriver, and form a lever principle to pry the 3 detaching portions 23 in turn by using the force-bearing surface 37 of the base body 3. Thereby achieving the purpose of disassembling the tool holder 2.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.

Claims

1. A cutting device (1) with fastening means for a ground working machine, comprising a tool holder (2) and a basic body (3), characterized in that: the cutting device (1) comprises at least one fastening part (5) and a locking part (4), wherein the fastening part (5) and the locking part (4) are matched to be used for fixing the tool holder (2) and the base body (3) together.

2. The cutting device with the fastening member according to claim 1, wherein the tool holder (2) comprises a through hole (204), a tool mounting portion (22), and an elongated shank portion (202), the through hole (204) being open on one side of an upper end surface of the tool holder, the tool mounting portion (22) being on the other side of the upper end surface, the elongated shank portion (202) being disposed on a side of a bottom of the tool holder away from the through hole (204);

3. The cutting device with the fastening component as claimed in claim 2, wherein the locking component (4) is a bolt, the fastening component (5) is a cylinder, and the fastening component (5) comprises a head portion (52), a threaded hole (50), a detaching portion (53) and a tail portion (54) which are arranged in sequence; the threaded hole (50) is matched with the locking component (4), the fastening component (5) is arranged in the transverse mounting part (33), and the locking component (4) penetrates through the threaded hole (50) to be fixed with the fastening component (5).

4. A cutting device with a fastening member according to claim 3, characterized in that the axis (L4) of the threaded hole (50) forms an angle (g) of 85 ° -95 °, preferably 90 °, with the axis (L5) of the fastening member (5).

5. The cutting device with fastening means as claimed in claim 4, characterized in that the central axis (L22) of the through hole (204) is in parallel arranged relationship with the central axis (L) of the elongated handle (202).

6. The cutting device with the fastening component as set forth in claim 2, characterized in that the cutter mounting portion (22) includes a cutter mounting face (21) of the head and a plurality of wear indicating grooves (20) on an outer side wall.

7. The cutting device with fastening member as claimed in claim 6, wherein the cutter mounting portion (22) is inclined to a side away from the through hole (204), and a central axis (L0) of the cutter mounting portion (22) is at an angle of 130 ° to 140 ° to a central axis of the elongated shank portion (202).

8. The cutting device with fastening means as claimed in claim 7, characterized in that said elongated shank (202) is semi-conical or parabolic in shape with a diameter that decreases progressively from top to bottom.

9. A cutting device with a fastening member as claimed in claim 3, wherein the removal portion is a groove, preferably annular.

10. The cutting device with the fastening component as claimed in claim 2, characterized in that the base body (3) has a raised portion at its end near the receiving portion (30), the raised portion comprising a frontmost surface (301), surfaces (300, 304) arranged on both sides of the surface (301), the surfaces (302, 303) being arranged at an angle;

knife rest (2) are equipped with the working face with the corresponding one end in base member (3) uplift position, the working face is including arranging charge level (25), row charge level (26), row charge level (27), it is at forefront to arrange charge level (25), row charge level (26), row charge level (27) are located row charge level (25) both sides, and row charge level (25) are the contained angle with row charge level (26) and arrange, and row charge level (25) are the contained angle with row charge level (27) and arrange.