CN215800870U - Wear-resistant bituminous pavement chisel - Google Patents

Abstract

The utility model provides an asphalt pavement chisel sword wear-resistants, includes the main part, the cutting edge, wear-resistant ring, wherein the main part has by top portion, tip and the holding portion of last coaxial setting in proper order down, the holding portion is used for assembling and limits chisel sword at radial and ascending displacement in the axial, and the top portion has first outer peripheral face, tip upper portion has the terminal surface, and wear-resistant ring has the interior anchor ring to establish on first outer peripheral face through the interior anchor ring cover, wear-resistant ring bottom surface is connected fixedly with the terminal surface, thereby is fixed in the main part with wear-resistant ring; the design of increasing ring of wearing resistance has effectively protected chisel sword main part top portion and tip, prevents that it from wearing and tearing excessively too fast to can realize the longer life of chisel sword, realize better wear characteristic, obviously reduce the operating expenses.

Description

Wear-resistant bituminous pavement chisel

Technical Field

The utility model belongs to the technical field of milling machine part, mainly relate to a bituminous paving chisel that is used for road milling machine to have ring of wearing that wear-resistants.

Background

Shank cutters are commonly used on the cutting rolls of ground maintenance machines, such as 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, consequently, constitute by carbide material usually, in order to improve cutter life, but the cutter body part still adopts alloy steel material, the wearability is relatively poor, lead to the unmatching of cutter body and knife tip life, the cutter body is worn out in advance completely, the cutter has to be changed, so the handle-carrying cutter structure has the profound 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, wear-resisting material rate of utilization is low, use cost is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model discloses an abrasion-resistant asphalt pavement chisel which is simple in structure, long in service life and low in construction cost.

The utility model aims to realize the anti-wear asphalt pavement chisel tool, which comprises a main body, a cutting edge and an anti-wear ring, wherein the main body is provided with a top end part, an end part and a holding part which are coaxially arranged from top to bottom, the holding part is used for assembling and limiting the axial and radial displacement of the chisel tool, the top end part is provided with a first outer circumferential surface, the upper part of the end part is provided with a stop surface, the anti-wear ring is provided with an inner annular surface and is sleeved on the first outer circumferential surface through the inner annular surface, and the bottom surface of the anti-wear ring is fixedly connected with the stop surface, so that the anti-wear ring is fixed on the main body.

Preferably, the antiwear ring has a main working surface, an auxiliary working surface and a side working surface which are sequentially connected from top to bottom and are coaxial, the main working surface and the bottom surface of the antiwear ring are parallel and have a distance H, and the size range of the distance H is 3-10 mm.

Preferably, the inner annular surface of the antiwear ring has a diameter φ a, and the size of the antiwear ring ranges from 20 mm to 25 mm.

Preferably, the side running surface of the wear ring has a diameter ob in the size range 30 to 35 mm.

Preferably, the inner ring surface of the antiwear ring and the side working surface of the antiwear ring are coaxial cylindrical surfaces and have a common central axis A1.

Preferably, the body is a solid of revolution having a central axis a, and the central axis a coincides with the central axis a 1.

Preferably, the first outer peripheral surface of the tip portion has a diameter Φ c, which is in a size range of 20 to 25 mm.

Preferably, the tip portion has a concave coating surface at an upper end thereof, and the cutting edge bottom portion has a mounting surface that matches the coating surface.

Preferably, the cutting edge and the antiwear ring are both made of cemented carbide material.

Preferably, the body is made of an alloy steel material.

Compared with the prior art, the anti-wear ring for the anti-wear asphalt pavement chisel has the advantages that the design of the anti-wear ring for the anti-wear asphalt pavement chisel effectively protects the top end part and the end part of the chisel main body and prevents the chisel main body from being worn excessively and quickly, so that the chisel can be longer in service life, better in wear characteristic and obviously reduced in construction cost.

Drawings

FIG. 1 is an overall front view of the wear-resistant asphalt pavement chisel of the present invention;

FIG. 2 is a sectional view A (mounted on the body) of the antiwear ring of the anti-wear asphalt pavement chisel of FIG. 1;

FIG. 3 is an enlarged partial view of view C of FIG. 1;

figure 4 is a front view of the wear ring of the anti-wear asphalt pavement chisel of figure 1.

Figure 5 is a cross-sectional view taken along line B of the wear ring of figure 4.

Fig. 6 is an exploded view of the wear-resistant asphalt pavement chisel according to the present invention.

Detailed Description

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

The wear-resistant asphalt pavement chisel according to the embodiment is shown in fig. 1 to 3, and includes a main body 10, a cutting edge 20, and a wear-resistant ring 30, where the main body 10 has a top end portion 12, an end portion 11, a holding portion 13, the top end portion 12 has a first outer circumferential surface 12.1, the end portion 11 has a termination surface 11.1, where the wear-resistant ring 30 passes through the inner circumferential surface 32 and passes through the first outer circumferential surface 12.1 along the V direction, and a welding tab 40 is filled between the wear-resistant ring bottom surface 31 and the termination surface 11.1, the welding tab 40 is of a ring-mounted structure, and includes an upper surface 43, a lower surface 44, and an outer circumferential surface 42, and the wear-resistant ring 30 is fixed on the main body 10 after being melted by the welding tab 40 and always maintains an integrated state.

The body 10 is of a solid of revolution having a central axis a, and the first outer peripheral surface 12.1 of the tip portion 12 has a diameter Φ c in the range of 20 to 25mm in size. The tip portion 12 has a clad surface 12.2, and the mounting surface 21 of the cutting edge 20 matches the clad surface 12.2.

As shown in FIG. 4 and FIG. 5, the wear ring 30 has a major running surface 33, a minor running surface 34, and a side running surface 35, with a distance H between the major running surface 33 and the bottom surface 31, ranging in size from 3 to 10 mm.

The inner annular surface 32 of the wear ring 30 has a diameter φ a and has a dimension in the range of 20 to 25 mm. The side running surface 35 of the wear ring 30 has a diameter ob in the range of 30 to 35 mm. The inner annular surface 32 of the wear ring 30 is concentric with the side running surface 35 of the wear ring 30 and has a central axis a1 that is coaxial with the central axis a. The cutting edge 20 and the wear ring 30 are both comprised of cemented carbide material.

Fig. 6 shows an exploded view of the chisel, the body 10 is made of alloy steel, and the holding portion 13 is used for assembling and limiting a certain degree of displacement of the chisel in the radial and axial directions. 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 the primary member for cutting into and breaking through the material such as road asphalt, and the wear amount thereof is much larger than that of the body 10, the tip portion 12 is used for connecting and seating the cutting edge 20, and has the effect of enlarging the cutting area, and the wear extends from the cutting edge 20 up to the end portion 11, and it is apparent that the cutting edge 20 is worn more than the tip portion 12 than the end portion 11. From the above, it can be seen that the body 10 is made of alloy steel, and the wear resistance is much lower than that of the cutting edge 20 made of carbide, so that the service life of the cutting edge 20 and the tool body 10 must be the same or similar. It is then a better way to provide an anti-wear ring 30 made of carbide material on the periphery of the tip portion 12. The tip portion 12 to the end portion 11 can be effectively protected from excessive wear and tear too quickly.

Therefore, the wear-resistant asphalt pavement chisel provided by the utility model can realize better matching of the working lives of the main body 10 and 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 (10)

1. The anti-wear asphalt pavement chisel is characterized by comprising a main body (10), a cutting edge (20) and an anti-wear ring (30), wherein the main body (10) is provided with a top end part (12), an end part (11) and a holding part (13) which are coaxially arranged from top to bottom, and the cutting edge (20) is fixed on the top end part (12); keep portion (13) to be used for the assembly and restrict the chisel tool at radial and the ascending displacement of axial, top portion (12) have first outer peripheral face (12.1), tip (11) upper portion has terminal face (11.1), and ring (30) wear-resisting has interior anchor ring face (32) to establish on first outer peripheral face (12.1) through interior anchor ring face (32), ring bottom surface (31) wear-resisting is connected with terminal face (11.1), thereby is fixed in on main part (10) ring (30) wear-resisting.

2. The anti-wear asphalt pavement chisel according to claim 1, wherein the wear-resistant ring (30) has a main working surface (33), a secondary working surface (34) and a side working surface (35) which are sequentially connected from top to bottom and coaxial, the main working surface (33) and the wear-resistant ring bottom surface (31) are parallel and have a distance H, and the size range of the distance H is 3-10 mm.

3. An anti-wear asphalt pavement chisel according to claim 1, wherein said inner annular surface (32) of said wear ring (30) has a diameter Φ a in the range of 20 to 25 mm.

4. An anti-wear asphalt pavement chisel according to claim 2, wherein said wear ring (30) side working surface (35) has a diameter Φ b in the range of 30 to 35 mm.

5. The anti-wear asphalt pavement chisel according to claim 4, wherein the inner annular surface (32) of the wear ring (30) and the side working surface (35) of the wear ring (30) are coaxial cylindrical surfaces and have a common central axis A1.

6. Wear-resistant asphalt pavement chisel according to claim 5, wherein said body (10) is of a solid of revolution configuration having a central axis A, and wherein central axis A coincides with central axis A1.

7. A wear-resistant asphalt pavement chisel according to claim 1, wherein said first outer peripheral surface (12.1) of said tip portion (12) has a diameter Φ c in the range of 20 to 25 mm.

8. An abrasion-resistant asphalt pavement chisel according to claim 1, wherein said tip portion (12) has a concave covering surface (12.2) at the upper end thereof, and the bottom of the cutting edge (20) has a mounting surface (21) matching the covering surface (12.2).

9. The wear-resistant asphalt pavement chisel according to claim 1, wherein said cutting edge (20) and said wear ring (30) are both comprised of cemented carbide material.

10. Wear-resistant asphalt pavement chisel according to claim 1, wherein said body (10) is comprised of an alloy steel material.

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