CN213925778U

CN213925778U - Cutter frame for milling machine

Info

Publication number: CN213925778U
Application number: CN202021952116.2U
Authority: CN
Inventors: 苗祥; 秦鹏程
Original assignee: Suzhou Wuyuansu Machinery Manufacturing Co ltd
Current assignee: Jiangsu Wuyuan Machinery Manufacturing Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-08-10
Anticipated expiration: 2030-09-09

Abstract

The utility model relates to a cutter frame for milling machine, which comprises a body and a cutter receiving part, wherein the cutter receiving part comprises a cutter receiving hole for mounting a cutter and a cutter mounting surface, the cutter frame is provided with a cutter withdrawing opening, and the cutter withdrawing opening consists of an open surface, a first inner through surface and a second inner through surface; the cutter can be quickly and easily disassembled and replaced by arranging the cutter retreating edge, so that the construction efficiency is greatly improved, the operation cost is reduced, and the labor intensity of operators is reduced.

Description

Cutter frame for milling machine

Technical Field

The utility model belongs to the technical field of engineering machine tools such as road surface processing machine, road building machine, concretely relates to cutter frame for milling machine.

Background

The cutting rolls of road milling machines or similar machines are usually equipped with a blade carrier changing system. In this case, the base part of the tool holder changing system can be connected to the surface of the cutting roll tube, in particular welded or screwed. For this purpose, the basic parts are positioned relative to one another in such a way that a loading spiral is formed on the surface of the cutting roll. The tool holder is connected by a base part, wherein the tool holder and the base part can be screwed, welded or otherwise fixed, for example by clamping. In the simplest case, the tool holder can also be connected directly to the surface of the cutting roller tube. The tool holder has a tool receiving seat. The tool can be replaceably mounted in the tool receiving seat. When using the machine, the tool strikes with its tip against the surface of the ground to be stripped and cuts into it. While the ground material is chiseled open. The material stripped off in this way can be transported, for example, by a stripping and loading screw to the middle of the cutting roller and, in the process, transported away from the working region of the cutting roller by means of a discharger. The stripped material can then be transported away by suitable means, for example a conveyor belt. The tool is equipped with a plurality of cutting tips, which are made of hard material and which produce a cutting action. The cutting tip is therefore subject to wear erosion and must therefore be made of a suitable hard material in order to achieve the longest possible service life. Tools with cutting edges made of hard metal are known from the prior art, which tools are usually arranged rotatably in tool receptacles of tool holders in order to be able to produce uniform wear on the circumferential side of such tools. Due to the high wearability of the cutter, the cutter needs to be replaced frequently, so that the cutter can be replaced quickly and easily, which becomes a main factor affecting the construction efficiency, the cost and the labor intensity of personnel.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a milling machine blade carrier that allows quick and easy replacement of the tools. This purpose is realized through the following technical scheme:

the cutter holder for the milling machine comprises a body and a cutter receiving part, wherein the cutter receiving part comprises a cutter receiving hole and a cutter mounting surface, the cutter receiving hole is used for mounting a cutter, a cutter withdrawing opening is machined in the lower side wall of the cutter receiving part, the cutter withdrawing opening is formed by a connected opening surface, a first inner through surface and a second inner through surface, the second inner through surface is arranged on the lower side of the first inner through surface, and the opening surface is arranged on the inner side of the first inner through surface and the inner side of the second inner through surface.

Preferably, the relief edge is in communication with the tool receiving bore.

Preferably, the relief edge is communicated with the tail surface of the tool holder and is in an open state.

Preferably, the relief edge is formed symmetrically on both sides of the median plane M of the tool holder.

Further, the relief edge opening surface extends obliquely as a transition surface between the first interior through surface and the tool receiving bore.

Preferably, the opening height of the relief edge is not less than one quarter of the height of the tool holder.

Preferably, the first inner through surface of the receding knife edge is a semi-cylindrical surface.

Preferably, the central axis L of the tool receiving bore is disposed perpendicular to the central axis L1 of the first interior through face.

Furthermore, the width of the lower part of the knife withdrawing edge, namely the distance between two side walls of the second inner through surface, is equal to the diameter of the semi-cylindrical surface.

Further, the diameter of the tool receiving hole has a value no less than the width of the lower portion of the relief edge.

The utility model discloses a cutter frame for milling machine has following advantage at least:

the utility model discloses a milling machine is with cutter frame moves back the edge of a knife through the setting and makes the cutter can be dismantled and change fast and easily, improves the efficiency of construction greatly, reduces the operating cost, alleviates operating personnel intensity of labour.

Drawings

FIG. 1 is a front view of a tool holder;

FIG. 2 is a rear view of the tool holder;

FIG. 3 is a bottom view of the base member;

FIG. 4 is an exploded view of the tool holder mounted with the base member;

FIG. 5 is a perspective front view of the tool holder with the base member installed;

FIG. 6 is a front rear view of the tool holder;

FIG. 7 is a cross-sectional view taken along line A of the tool holder of FIG. 6;

FIG. 8 is a back view of the tool receiver;

FIG. 9 is a side elevational, fully cross-sectional view of the tool holder with the tool attached;

fig. 10 is a front view of a portion of a milling drum assembly of the road milling machine;

fig. 11 is a perspective view of a portion of a milling drum assembly of the road milling machine;

fig. 12 is a top view of a portion of a road milling machine milling drum assembly.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

Fig. 1 and 2 show a tool holder 1 for a milling machine, comprising a body 1.2, a tool receiving portion 1.8, the body 1.2 containing a positioning member 1.6, the tool receiving portion 1.8 containing a tool receiving hole 1.1, a tool mounting surface 12. The tool receiving bore can be machined to the appropriate size in a relatively simple manner and by a drilling or milling process. The tool receiving hole is for mounting a chisel 3.

Fig. 1 and 2 also show that the tool holder body 1.2 is an entity composed of a first peripheral surface 1.2, a second peripheral surface 1.3, a third peripheral surface 1.4 and a fourth peripheral surface 1.7.

And the positioning part 1.6 of the tool holder is positioned on the lower bearing surface 1.7 of the body 1.2 and comprises a support surface 1.5. It is generally preferred that the locating member is formed from a cylindrical body to facilitate moulding during the moulding process, whereby it is known that the bearing surface, i.e. the cylindrical outer portion of the locating member, acts as a locating feature in the radial circumferential direction.

Fig. 1 fig. 2 depicts a centering surface 1.9 arranged at the opening of the front end of a tool receiving bore 1.1 of a tool receiving portion 1.8. The centering surface is used for placing the protruding centering part of the cutter gasket, the structure is in a concave-convex matching relation, the centering surface completely contains the protruding centering part of the gasket, the working surface of the gasket and the cutter mounting surface can be attached smoothly, the central axes of the gasket and the cutter mounting surface can keep an overlapping relation, the coaxiality of the gasket and the cutter mounting surface in the working process is guaranteed, and the free rotation performance of the cutter can be kept continuously. Since the tool is constantly rotated during operation, the working surfaces of the spacers and the tool mounting surface are subjected to severe friction and constantly wear against each other, and the length of the tool holder in the axial direction is constantly reduced as the tool holder wears until it reaches the wear limit.

The toolholder system shown in fig. 3 and 4, comprising:

the tool holder 1 and a basic part 2, the basic part 2 has a force-bearing surface 2.4 for supporting the bearing surface 1.7 and a positioning part 2.2 for fixing the supporting surface 1.5 of the positioning part 1.6. The positioning part 2.2 of the base part 2 is located on the force-bearing surface 2.4.

The tool holder 1 is fixedly connected to the base part 2 by welding, and the limiting surface 2.1 of the base part 2 is also fixedly welded to the outer circumferential surface 11 of the milling drum 10. The tool holder 1 is fixedly connected with the base part 2 by welding, and the stress surface 2.4 is used for supporting the tool holder bearing surface 1.7 and is matched with the tool holder bearing surface 1.7 without clearance. On the mutual position relation of the tool rest 1 and the basic component 2, the positioning part of the basic component 2 is used for limiting the positioning part 1.6 of the tool rest 1, specifically, the positioning part 2.2 of the basic component 2 is arranged in a cylindrical hole, the positioning part 1.6 of the tool rest 1 is in a cylindrical excircle form, and the positioning part are matched into a matching relation of a shaft and a hole.

Fig. 5 shows that a limiting surface 2.1 is provided opposite the force-bearing surface 2.4 of the base part 2. For mounting and positioning the base part 2, the limiting surface 2.1 is straight or curved and is in a fitting relationship with the outer circumference 11 of the milling drum 10, and the limiting surface 2.1 of the base part 2 is also welded and fixed to the outer circumference 11 of the milling drum 10 by the

surfaces

20, 30, 40, 50.

As shown in fig. 6 to 8, the tool holder 1 has a relief edge 100, and the relief edge 100 is composed of an open surface 101, a first inner through surface 102, and a second inner through surface 103. The relief edge 100 passes through the outer circumferential surface 104 of the cutter-receiving portion 1.8 and communicates with and terminates at the cutter-mounting hole 1.1 and is formed at the rear of the cutter-receiving portion 1.8. The relief edge 100 is open and in communication with the trailing face 150 of the toolholder 1. The relief edge 100 is formed on both sides of the median plane M of the tool holder 1 and is symmetrically arranged about the median plane M on both sides. The open face 101 of the relief edge 100 extends obliquely from the first interior passage face 102 towards the tool receiving bore 1.1. The relief edge 100 is disposed in a perpendicular relationship to the central axis L of the tool receiving bore 1.1. The opening length of the relief edge 100 is about one third of the total length of the tool holder 1. The first inner through-surface 102 of the relief edge 100 forms a semi-cylindrical surface having a central axis L1 and a diameter Φ c106, the diameter Φ c106 having a dimension in the range of 15-25 mm. The second inner through surface 103 of the relief notch 100 is symmetrical about the bisection plane M to form a width a105, and a105 is the lower width of the relief notch 100, i.e., the distance between two side walls of the second inner through surface 103; a105 ranges in size from 15-25mm and φ c106 equals a105 value. The diameter phib 18 of the tool receiving bore 1.1 is greater than or equal to phic 106 and a105 in value.

Fig. 9 shows a state where the tool 3 is mounted in the tool rack 1, and the removal tool 300 can easily extend from the tool withdrawal opening 100 into the tool mounting hole 1.1 and hammer the striking surface 200 of the tool 3, thereby withdrawing the tool 3 from the tool mounting hole 1.1 in the V direction.

Fig. 10-12 show, from a plurality of angles, an operational view of a part of a milling drum assembly of a road milling machine, with several milling tool carrier systems welded to the surface 11 of the milling drum 10. When the cutter 3 needs to be replaced, the cutter frame system is arranged closely front and back, left and right, and the operation space is small, so that it is very difficult to replace the cutter 3 frequently, the conventional method is to arrange a special annular groove 210 (as shown in fig. 9) on the cutter 3, and a special disassembling tool is used to withdraw the cutter 3 from the cutter mounting hole 1.1, even then, an operator needs to use an iron hammer to strike the special disassembling tool for several times, so as to disassemble one cutter 3, while hundreds of such cutter frame systems are welded on one milling drum assembly, and the labor intensity and difficulty of the disassembly are conceivable. Therefore, the utility model discloses the inventor sets up in tool carrier 1 and moves back edge of a knife 100, and extracting tool 300 can be very easy stretch into cutter mounting hole 1.1 from moving back edge of a knife 100 to hammering face 200 of beating of cutter 3, thereby easily withdraw from cutter mounting hole 1.1 with cutter 3 along the V direction, revolutionarily solved the difficult point in the conventional method of dismantling cutter 3, improve the efficiency of construction greatly, reduce the operating cost, alleviate operating personnel intensity of labour.

During the actual milling of the road surface, the milling drum 10 is rotated in the X direction, so that the cutting tools 3 mounted in the tool holder system of the milling tool cut into the road surface and remove the waste road material.

It should be noted that the drawings of the present embodiment are in a very simplified form and all use non-precise ratios, which are only used for convenience and clarity to aid in the description of the embodiments of the present invention.

It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A cutter frame (1) for a milling machine comprises a body (1.2) and a cutter receiving portion (1.8), wherein the cutter receiving portion (1.8) comprises a cutter receiving hole (1.1) for mounting a cutter (3) and a cutter mounting surface (12), and is characterized in that a cutter retreating opening (100) is machined in the lower side wall of the cutter receiving portion, the cutter retreating opening (100) is formed by a connected opening surface (101), a first inner through surface (102) and a second inner through surface (103), the second inner through surface (103) is arranged on the lower side of the first inner through surface (102), and the opening surface (101) is arranged on the inner sides of the first inner through surface (102) and the second inner through surface (103).

2. The milling machine tool holder (1) according to claim 1, characterized in that the relief edge (100) communicates with a tool receiving hole (1.1).

3. The milling machine tool holder (1) according to claim 2, characterized in that the relief edge (100) is in open communication with the rear face (150) of the tool holder (1).

4. The milling machine tool holder (1) according to claim 3, characterized in that the relief edge (100) is formed symmetrically on both sides of a median plane (M) of the tool holder (1).

5. The milling machine tool holder (1) according to claim 4, characterized in that the opening face (101) of the relief edge (100) extends obliquely as a transition face between the first inner through face and the tool receiving bore (1.1).

6. The milling machine cutter carrier (1) according to any one of claims 1 to 5, characterized in that the opening height of the relief edge (100) is not less than one quarter of the height of the cutter carrier (1).

7. The milling machine tool holder (1) according to claim 1, characterized in that the first inner through surface (102) of the relief edge (100) is a semi-cylindrical surface.

8. The milling machine tool holder (1) according to claim 7, characterized in that the central axis L of the tool receiving hole (1.1) is arranged perpendicular to the central axis L1 of the first inner through face (102).

9. The milling machine tool holder (1) according to claim 8, characterized in that the width (a 105) of the lower part of the relief edge (100), i.e. the distance between the two side walls of the second inner passage surface (103), is equal to the diameter (Φ c 106) of the semi-cylindrical surface.

10. The milling machine tool holder (1) according to claim 9, characterized in that the diameter (Φ b 18) of the tool receiving hole (1.1) has a value not smaller than the diameter (Φ c 106) of the semi-cylindrical surface and the lower width (a 105) of the relief edge (100).