CN216864766U - Chisel suitable for heavy load working condition - Google Patents

Abstract

The application relates to a chisel suitable for heavy load working conditions, which comprises a body and a cutting edge, wherein the body is provided with a guide part and a support part, and the support part is arranged on the lower side of the guide part; the top end of the guide part is provided with an accommodating cavity which is of a revolving body structure and comprises a first accommodating surface, a second accommodating surface, a third accommodating surface and a fourth accommodating surface which are sequentially connected from top to bottom and of which the radius is gradually reduced, wherein the fourth accommodating surface is the bottom surface of the accommodating cavity; the cutting edge is in a spindle shape, the lower part of the cutting edge is matched with the accommodating cavity, and the lower part of the cutting edge is inserted into the accommodating cavity and welded with the body; compared with the prior art, the chisel tool applicable to the heavy-load working condition has the advantages that the chisel tool adopts a cutting edge design with a large diameter and a large fillet, is combined with a body with an enlarged diameter, is particularly suitable for heavy-load and large-cutting-depth operation occasions, can achieve a longer service life, achieves better abrasion characteristics, and obviously reduces construction cost.

Description

Chisel suitable for heavy load working condition

Technical Field

The application belongs to the technical field of milling machine parts, mainly relates to a chisel suitable for heavy load operating mode.

Background

Shank cutters are commonly used in ground maintenance machines, such as the cutting rolls of road milling machines, road recyclers, or similar machines; the knife tip of cutter is its direct work part, with the road material direct contact who needs the excision, the wearing and tearing volume is huge, it is especially serious under the heavy load operating mode, consequently, constitute by carbide material usually, in order to improve cutter life, the cutter body part still adopts alloy steel material, the wearability is relatively poor, lead to the unmatched of cutter body and knife tip life, the cutter body is worn out completely in advance, the cutter has to be changed, so the handle-carrying cutter structure has far-away influence to the life of cutter, however, the handle-carrying cutter among the prior art is limited to traditional shape and structure, short service life, the rate of utilization of wear-resisting material is low, high use cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a chisel tool which is stable in structure, long in service life, low in construction cost and suitable for heavy-load working conditions.

In order to solve the technical problem, the utility model discloses a chisel suitable for heavy load working conditions, which comprises a body and a cutting edge, wherein the body is provided with a guide part and a support part, and the support part is arranged on the lower side of the guide part; the top end of the guide part is provided with an accommodating cavity, the top of the accommodating cavity is provided with an opening, the accommodating cavity is of a revolving body structure and comprises a first accommodating surface, a second accommodating surface, a third accommodating surface and a fourth accommodating surface which are sequentially connected from top to bottom and have gradually-reduced radiuses, wherein the fourth accommodating surface is the bottom surface of the accommodating cavity;

the cutting edge is spindle-shaped, the lower part of the cutting edge is matched with the accommodating cavity, and the lower part of the cutting edge is inserted into the accommodating cavity and welded with the body.

Preferably, the diameter of the accommodating cavity is 22-25mm, the second accommodating surface of the accommodating cavity is in an inverted semi-conical shape, the diameter of the bottom of the second accommodating surface is 14-17mm, the third accommodating surface of the accommodating cavity is in an inverted semi-conical shape, the diameter of the bottom of the third accommodating surface is 12-15mm, and the diameter of the fourth accommodating surface of the accommodating cavity is 10-13 mm.

Preferably, the depth of the second accommodating surface is smaller than that of the third accommodating surface.

Preferably, the cutting edge includes top main working face, vice working face, first connection face, second connection face, third connection face and the fourth connection face that connects gradually from top to bottom, first connection face, second connection face, third connection face and fourth connection face respectively hold face, second and hold face, third and hold face and fourth and hold face looks adaptation in proper order.

Preferably, the top major face is convex and has a diameter of 12-15 mm.

Preferably, the secondary working surface is concave and has a base diameter of 22-25 mm.

Preferably, a plurality of bulges are uniformly distributed on the two connecting surfaces.

Preferably, the cutting edge is made of a cemented carbide material.

Compared with the prior art, the chisel tool applicable to the heavy-load working condition has the advantages that the chisel tool is designed by adopting the cutting edge with a large diameter and a large fillet, is particularly suitable for heavy-load and large-cutting-depth operation occasions by combining the body with the enlarged diameter, can realize longer service life of the chisel tool, realizes better abrasion characteristic, and obviously reduces construction cost.

Drawings

Figure 1 is a schematic view of a chisel suitable for use in heavy duty applications;

FIG. 2 is a schematic view of the body of FIG. 1;

fig. 3 is a schematic view of the structure of the cutting edge of fig. 1.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, a chisel suitable for heavy load condition comprises a body 10 and a cutting edge 20, wherein the body 10 has a guiding portion 11, a supporting portion 12, and the supporting portion 12 is disposed at the lower side of the guiding portion 11; the top end of the guide portion 11 is provided with an accommodating cavity 110, the top of the accommodating cavity 110 is provided with an opening, the accommodating cavity 110 is of a revolving structure, the accommodating cavity 110 comprises a first accommodating surface 13, a second accommodating surface 14, a third accommodating surface and a fourth accommodating surface 15, the first accommodating surface, the second accommodating surface and the fourth accommodating surface are sequentially connected from top to bottom, the radius of the first accommodating surface is gradually reduced, and the fourth accommodating surface 16 is the bottom surface of the accommodating cavity 110;

the cutting edge 20 is spindle-shaped, the lower part of the cutting edge 20 is matched with the accommodating cavity 110, and the lower part of the cutting edge 20 is inserted into the accommodating cavity 110 and welded with the body 10.

The diameter of the accommodating cavity 110 13 is 22-25mm, the second accommodating surface 14 of the accommodating cavity 110 is in an inverted semi-conical shape, the bottom diameter of the second accommodating surface 14 is 14-17mm, the third accommodating surface 15 of the accommodating cavity 110 is in an inverted semi-conical shape, the bottom diameter of the third accommodating surface 15 is 12-15mm, and the diameter of the fourth accommodating surface 16 of the accommodating cavity 110 is 10-13 mm.

The second receiving surface 14 is less deep than the third receiving surface 15.

The cutting edge 20 comprises a top main working surface 21, an auxiliary working surface 22, a first connecting surface 23, a second connecting surface 24, a third connecting surface 25 and a fourth connecting surface 26 which are sequentially connected from top to bottom, wherein the first connecting surface 23, the second connecting surface 24, the third connecting surface 25 and the fourth connecting surface 26 are sequentially matched with the first accommodating surface 13, the second accommodating surface 14, the third accommodating surface and the fourth accommodating surface 15 and 16 respectively.

The top main working surface 21 is a convex surface with a diameter of 12-15 mm.

The secondary working surface 22 is concave and has a bottom diameter of 22-25 mm.

A plurality of protrusions 240 are uniformly distributed on the two connecting surfaces 24. The protrusion 240 can form a gap between the second connecting surface 24 and the second accommodating surface 14 during soldering, so that solder can be better melted into the gap, and the firmness is improved.

The cutting edge 20 is made of hard alloy material.

The lower part of the body 10 is provided with an antiwear ring 30; the cutting edge 20 and the wear ring 30 are both comprised of cemented carbide material. The body 10 is made of alloy steel, and the support portion 12 is used for assembling and limiting the chisel blade to a certain degree of displacement in the radial direction and the axial direction. The cutting edge 20 is made of a cemented carbide material such as carbide, diamond, polycrystalline diamond or other diamond-like hardness material. The carbide in the cutting edge 20 is an alloy of tungsten carbide, which ensures sufficient hardness and wear resistance, and cobalt, which is relatively "softer" to bond the tungsten carbide particles together, thereby ensuring the desired breaking strength even under the highest impact loads. In the actual road surface cutting state, the cutting edge 20 is a primary member for cutting into and breaking through materials such as road asphalt, and the amount of wear thereof is much larger than that of the main body 10, and the sub-land 22 has a function of enlarging the cutting area. The body 10 is formed of an alloy steel material and has a much lower wear resistance than the carbide cutting edge 20, so that the cutting edge 20 and the cutter body 10 must have the same or similar life in use. It is then a better way to provide the wear ring 30 of carbide material on the periphery of the support portion 12. The guide portion 11 can be effectively protected from excessive wear and tear at an excessive speed.

Therefore, the chisel cutter suitable for the heavy-load working condition can realize better matching of the working life of the body 10 and the working life of the cutting edge 20, achieve better wear characteristics, more reliable working stability and longer service life, and greatly reduce the total use cost.

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 although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the purpose of a concrete description of the feasible embodiments of the present application, they are not intended to limit the scope of the application, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present application are intended to be included within the scope of the present application.

Claims (8)

1. A chisel suitable for heavy load working condition comprises a body (10) and a cutting edge (20), wherein the body (10) is provided with a guide part (11) and a support part (12), and the support part (12) is arranged at the lower side of the guide part (11); the top end of the guide part (11) is provided with an accommodating cavity (110), and the top of the accommodating cavity (110) is provided with an opening, the accommodating cavity (110) is of a revolving body structure, the accommodating cavity (110) comprises a first accommodating surface (13), a second accommodating surface (14), a third accommodating surface (15) and a fourth accommodating surface (16), wherein the first accommodating surface, the second accommodating surface, the third accommodating surface and the fourth accommodating surface are sequentially connected from top to bottom, and the radius of the first accommodating surface, the second accommodating surface, the third accommodating surface and the fourth accommodating surface is gradually reduced, and the fourth accommodating surface (16) is the bottom surface of the accommodating cavity (110);

the cutting edge (20) is spindle-shaped, the lower portion of the cutting edge (20) is matched with the accommodating cavity (110), and the lower portion of the cutting edge (20) is inserted into the accommodating cavity (110) and welded with the body (10).

2. The chisel blade according to claim 1, wherein the diameter of the first receiving surface (13) of the receiving cavity (110) is 22-25mm, the second receiving surface (14) of the receiving cavity (110) is an inverted half cone, the bottom diameter of the second receiving surface (14) is 14-17mm, the third receiving surface (15) of the receiving cavity (110) is an inverted half cone, the bottom diameter of the third receiving surface (15) is 12-15mm, and the diameter of the fourth receiving surface (16) of the receiving cavity (110) is 10-13 mm.

3. Chisel blade according to claim 2, wherein the second receiving surface (14) is less deep than the third receiving surface (15).

4. Chisel blade according to claim 2, wherein the cutting edge (20) comprises a top main running surface (21), a secondary running surface (22), a first connecting surface (23), a second connecting surface (24), a third connecting surface (25) and a fourth connecting surface (26) which are connected in series from top to bottom, wherein the first connecting surface (23), the second connecting surface (24), the third connecting surface (25) and the fourth connecting surface (26) are adapted to the first accommodating surface (13), the second accommodating surface (14), the third accommodating surface (15) and the fourth accommodating surface (16) in series.

5. Chisel blade adapted for heavy duty use according to claim 4 wherein the top major face (21) is convex and has a diameter of 12-15 mm.

6. Chisel blade according to claim 5 wherein the secondary working surface (22) is concave with a bottom diameter of 22-25 mm.

7. Chisel blade according to claim 4, wherein the two connecting surfaces (24) are provided with a plurality of protrusions (240) on each side.

8. Chisel blade according to claim 1, wherein the cutting edge (20) is made of cemented carbide.

Images