CN217556644U

CN217556644U - Light-load chisel

Info

Publication number: CN217556644U
Application number: CN202221210486.8U
Authority: CN
Inventors: 苗祥; 秦鹏程
Original assignee: Jiangsu Wuyuan Machinery Manufacturing Co ltd
Current assignee: Jiangsu Wuyuan Machinery Manufacturing Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-10-11
Anticipated expiration: 2032-05-20

Abstract

A light-load chisel is used for road surface operation and comprises a main body, wherein one side of the main body is provided with a connecting part used for being installed on a milling drum of a road milling machine, the other side of the main body is provided with a cutting part gradually reduced in size towards one side close to the main body, the cutting part is provided with a first end face far away from the main body and a second end face close to the main body, and the area of the first end face is 1/6-2/5 of that of the second end face; a concave and cylindrical accommodating part is processed on the first end surface, and an alloy cutting head is fixed in the accommodating part; an included angle of 10-30 degrees is formed between the axis of the accommodating part and the axis of the connecting part; the light-load type chisel tool has the advantages that through the structural design of the optimized cutting part, the whole chisel tool has light weight, high working efficiency is obtained, and the balance between energy conservation and service life is realized.

Description

Light-load chisel

Technical Field

The utility model belongs to the technical field of engineering machine tool, mainly relate to a chisel for road surface milling machine.

Background

With the development of economy in China and the enhancement of comprehensive national force, the trend of urbanization of villages and towns, large-scale medium and small cities and garden large and medium cities is increasingly obvious, and the urban road reconstruction and extension projects are more and more. Further, the requirements for road milling machines and accessories thereof, which are one of the main equipments for maintaining and constructing asphalt and concrete road surfaces, are also increasing.

The main construction mode of the road milling machine is to realize the construction requirement by that the milling drum rotates rapidly and continuously during the actual milling process, and the chisel installed on the milling drum contacts with the asphalt concrete road surface and crushes the asphalt concrete road surface. The working part of the chisel is made of diamond with higher hardness and better wear resistance or hard material with hardness similar to the diamond, and wear-resistant protective material is added to the part with serious wear, because the chisel does not need to be replaced midway until being scrapped, and the volume and the weight are usually larger. During construction, a large number of chisels are arranged on the milling drum, regularly rotate, and sequentially bear high frequency and large impact force to be worn until the milling drum cannot be used continuously. The chisel has the characteristics of long service life, but the weight is large, the machine load is large, and the chisel does not meet the energy-saving requirement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a light load type chisel, through optimizing structural design, have lighter weight, obtain higher work efficiency, realize energy-conservation and life's balance.

The purpose of the utility model is realized like this: a light-load chisel is used for road surface operation and comprises a main body, wherein one side of the main body is provided with a connecting part used for being installed on a milling drum of a road milling machine, the other side of the main body is provided with a cutting part gradually reduced in size towards one side close to the main body, the cutting part is provided with a first end face far away from the main body and a second end face close to the main body, and the area of the first end face is 1/6-2/5 of that of the second end face; a concave and cylindrical accommodating part is processed on the first end surface, and an alloy cutting head is fixed in the accommodating part; the axis of the accommodating part and the axis of the connecting part form an included angle of 10-30 degrees.

Preferably, the first end face is 20mm to 25mm long and 20mm to 25mm wide.

Preferably, the second end face is 40mm to 50mm long and 40mm to 45m wide.

Preferably, the diameter of the receiving portion is 10mm to 20mm, and the depth is 10mm to 15mm.

Preferably, the axis of the receiving portion and the axis of the connecting portion form an angle of 15 ° to 25 °.

Preferably, the main body is further provided with a reinforcing part, the reinforcing part is arranged below the cutting part, and the cutting part and the main body are in transition connection through the reinforcing part.

Preferably, the reinforcement surface has a transition slope and first and second guide surfaces provided on both sides of the transition slope.

Preferably, the first and second guide surfaces have an included angle of 55 ° to 65 ° therebetween.

Preferably, the alloy cutting head is secured to the receiving portion by metal brazing.

Preferably, a protection part made of hard alloy material is embedded on one side wall of the lower part of the cutting part close to the accommodating part.

Compared with the prior art, the utility model, through optimizing structural design, have lighter weight, realize energy-conservation and life's balance.

Drawings

Figure 1 is a front side view of a chisel according to the present invention;

FIG. 2 isbase:Sub>A partial sectional view taken along line A-A of FIG. 1;

figure 3 is a front view of the chisel of the present invention;

fig. 4 is a full sectional view of B-B in fig. 3.

Detailed Description

The following describes the present invention in further detail with reference to the attached drawings.

As shown in fig. 1, a light load type chisel has a main body 1, the chisel body 1 is formed by molding an iron carbon alloy material, a connecting portion 2 is provided on the left side of the main body 1, a cutting portion 3 is provided on the right side of the main body 1, and the cutting portion 3 extends from the right side of the main body 1, and the projected area thereof is gradually reduced from left to right. The cutting portion 3 has a maximum length L1 in the size range of 50mm to 60mm. The cutting portion 3 has a minimum length L2 and a size ranging from 30mm to 40mm.

As shown in fig. 1 and fig. 3, the working mode of the chisel is to rotate around the point O in the direction F around the point O as the center of the circle, so as to break the road surface to be repaired. It can be seen that the cutting surface 40 of the cutting alloy 4 receives the greatest amount of wear, and therefore the cutting surface 40 is made of a material having a hardness similar to that of diamond, including but not limited to diamond, polycrystalline diamond, natural diamond, and a carbide of synthetic diamond, and has an extremely strong wear resistance characteristic. Whereas the front lower face 5 of the cutting part 3 is the location where the second wear is taken up, which is well protected by the previously described protection zone 5. The first guide surface 12 and the second guide surface 13 on both sides of the reinforcing portion 16 can effectively guide the road surface crushed material to disperse to both sides to the first guide-out surface 11 and the second guide-out surface 14 due to the design of a specific angle and a specific size, and the contact time between the road surface crushed material and each surface of the chisel and the resistance of the waste material during the chisel operation can be shortened.

As shown in fig. 1, the main body 1 has a surrounding surface 10, a transition inclined surface 15 extending outward from the front surface of the leading surface 11, the transition inclined surface 15 is located below the cutting portion 3, the reinforcing portion 16 mainly functions to increase the strength of the cutting portion 3, and since the cutting portion 3 of the chisel is subjected to a great impact force during operation and the torque arm of the cutting portion 3 of the chisel is long, the cutting portion 3 of the chisel may be broken during operation, and the reinforcing portion 16 may greatly enhance the overall strength of the chisel, thereby avoiding the failure of breakage.

In fig. 2 it can be seen that the cutting part 3 hasbase:Sub>A projection surface S1, i.e.base:Sub>A second end surface, which is produced bybase:Sub>A sectional cutbase:Sub>A-base:Sub>A, the projection surface S1 havingbase:Sub>A width W1,base:Sub>A height H1 and dimensions in the range 40mm to 50mm,40mm to 45mm, respectively.

As can be seen in fig. 3, the cutting part 3 has a projection surface S2, which is equal to the projection of the right flank 30. The projection surface S2, i.e., the first end surface, has a width W2 and a height H2, each ranging from 20mm to 25mm.

In fig. 3 and 4, the cutting part 3 has a receptacle 31 which, starting from the right flank 30, forms a cylindrical bore to the left with a central axis a. The receiving portion 31 has a diameter phia in the range of 10mm to 20mm in size and a depth D in the range of 10mm to 15mm in size. The receiving portion 31 is used for placing the cutting alloy 4, and is fixedly connected with the cutting portion 3 through metal brazing.

Furthermore, the reinforcing portion 16 has a first guide surface 12 and a second guide surface 13 on both sides thereof, and the first guide surface 12 and the second guide surface 13 form an included angle α therebetween, which is in the range of 55 ° to 65 °. The receiving portion 31 has a central axis a and the connecting portion 2 has a central axis B forming an angle β therebetween in the size range of 15 ° to 25 °.

As can be seen from fig. 4, a protection portion 5 is provided at the front lower portion of the cutting portion 3, and the protection portion 5 is generally made of cemented carbide and is formed by, but not limited to, brazing an integral piece of cemented carbide, a cemented carbide bar, a cemented carbide bean, or the like, or laser cladding a cemented carbide coating. The existence of the protection part 5 enables the chisel tool to reduce the loss of the tool in the working process and prolong the service life of the tool.

Therefore, the novel chisel has light weight by optimizing the structural design, obtains higher working efficiency and realizes the balance of energy conservation and service life. And the working resistance and the unit time abrasion loss of each outer surface can be effectively reduced, and the service life is prolonged.

It should be noted that the drawings of the present embodiment are in a very simplified form and all use non-precise ratios, and 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

1. A light-load type chisel is used for road surface operation and comprises a main body (1), and is characterized in that one side of the main body (1) is provided with a connecting part (2) used for being installed on a milling drum of a road milling machine, the other side of the main body is provided with a cutting part (3) with the size gradually reduced towards one side close to the main body (1), the cutting part (3) is provided with a first end face far away from the main body (1) and a second end face close to the main body (1), and the area of the first end face is 1/6 to 2/5 of the area of the second end face; a concave and cylindrical accommodating part (31) is processed on the first end surface, and an alloy cutting head (4) is fixed in the accommodating part (31); the axis of the accommodating part (31) and the axis of the connecting part (2) form an included angle of 10-30 degrees.

2. A light-load chisel according to claim 1 wherein said first end surface is 20mm to 25mm long and 20mm to 25mm wide.

3. A light-load chisel according to claim 2 wherein said second end surface is 40mm to 50mm long and 40mm to 45m wide.

4. A light-load chisel according to claim 1 wherein the receptacle (31) has a diameter of 10mm to 20mm and a depth of 10mm to 15mm.

5. A light-load chisel according to claim 1, wherein the axis of the receiving portion (31) is angled from 15 ° to 25 ° to the axis of the connecting portion (2).

6. Light load chisel according to claim 1, wherein the body (1) is provided with a reinforcement (16), the reinforcement (16) being provided on the underside of the cutting portion (3), the reinforcement (16) connecting the cutting portion (3) to the body (1) in a transition manner.

7. A chisel blade as claimed in claim 6, wherein the reinforcement (16) surface has a transition bevel (15) and a first guide surface (12) and a second guide surface (13) arranged on either side of the transition bevel (15).

8. A light-load chisel according to claim 7, wherein the first guide surface (12) and the second guide surface (13) have an included angle of 55 ° to 65 °.

9. A light-load chisel according to claim 1, wherein the alloy cutting head (4) is secured to the receiving portion (31) by metal brazing.

10. A light-load chisel according to claim 1, wherein a protective portion (5) made of cemented carbide is embedded in a side wall of the lower portion of the cutting portion (3) near the receiving portion (31).