CN220266253U

CN220266253U - High protection characteristic chisel utensil

Info

Publication number: CN220266253U
Application number: CN202321742689.6U
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: 2023-07-05
Filing date: 2023-07-05
Publication date: 2023-12-29
Anticipated expiration: 2033-07-05

Abstract

The utility model provides a chisel with high protection characteristics, which comprises a cutting head, a body, a steel sleeve and a steel pad, wherein at least one part of the chisel is arranged in a retainer, the body comprises a front section, a middle section and a rear section which are coaxially and sequentially arranged from top to bottom, the central axis is L, the cutting head is fixedly arranged at the central position of the end face of the front section, the middle section is provided with an extension part, the extension part expands from the central axis L to the diameter direction to form a conical revolving body, the rear section is sleeved with the steel pad and the steel sleeve, a movable cavity is arranged between the rear section and the steel sleeve, so that the rear section rotates in the steel sleeve, and the steel sleeve is arranged in the retainer and is fixedly connected with the retainer. The utility model can prolong the service life, has good support and stability and can prevent the eccentric wear phenomenon.

Description

High protection characteristic chisel utensil

Technical Field

The utility model belongs to the technical field of pavement maintenance operation tools, and particularly relates to a chisel with high protection characteristics.

Background

The chisel is used on a milling rotor of a road milling machine which mills damaged asphalt or cement road surfaces. The chisel comprises tungsten carbide alloy, chisel body, steel bushing and gasket, and during milling machine work, milling machine's power device starts milling rotor revolution, and a plurality of chisel on the milling rotor revolve along with milling rotor to the cutting road surface. When the chisel cuts into the ground, the axis of the cutter body and the working track plane of the cutter head form a proper included angle, and at the moment, the cutter head rotates while revolving along with the milling rotor. During the working process of the milling machine, the chisel of the milling machine, especially the chisel head, generates severe friction with the ground and the waste material and wears rapidly. Meanwhile, the cutter body and the gasket are also in direct contact with pavement materials for abrasion due to severe operation conditions or special mounting positions of the chisel. Chisel wear occurs in the bit, body and pad. In order to ensure that the cutter head, the cutter body and the gasket are uniformly worn, the service life of the cutter is prolonged, and the chisel needs to ensure that rotation occurs simultaneously when cutting into the ground, and each part of the peripheral surfaces of the cutter head, the cutter body and the gasket are contacted with pavement materials, so that the cutter head, the cutter body and the gasket are uniformly worn. However, during the working process of the milling machine, a certain proportion of chisel blades are always clamped in the cutter seat and cannot rotate, so that the cutter head, the cutter body and the gasket are worn on one side only, and eccentric wear is generated. If the cutter body connected with the cutter head is worn off-set for a long time, transitional wear can be generated, at the moment, the hardness of the cutter head is still enough, if a chisel is not replaced in time, the worn cutter body is insufficient to support the cutter head to cut a hard pavement and is broken, the cutter seat is worn, construction profession cannot be conducted, and larger damage to equipment is likely to be caused.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model is directed to providing a chisel with high protection characteristics, which can extend its service life, has good support and stability, and can prevent the occurrence of eccentric wear.

In order to achieve the above purpose, the utility model provides a chisel with high protection characteristics, which comprises a chisel at least a part of which is arranged in a retainer, wherein the chisel comprises a cutting head, a body, a steel sleeve and a steel pad, the body comprises a front section, a middle section and a rear section which are coaxially and sequentially arranged from top to bottom, the central axis is L, the cutting head is fixedly arranged at the central position of the end face of the front section, the middle section is provided with an extension part, the extension part expands from the central axis L to the diameter direction to form a conical revolving body, the rear section is sleeved with the steel pad and the steel sleeve, a movable cavity is arranged between the rear section and the steel sleeve, so that the rear section rotates in the steel sleeve, and the steel sleeve is arranged in the retainer and is fixedly connected with the retainer.

Preferably, the extension part comprises a first extension surface, a second extension surface and a third extension surface which are sequentially connected, the third extension surface is a horizontal plane, the extension part has a height h in the direction of the central axis L, and the size range is 9-11mm.

Preferably, the extension has a minimum diameter phic, a maximum diameter phib, and a minimum diameter phic of 30 to 32mm; the maximum diameter phib is 40 to 42mm.

Preferably, the first extension surface forms an included angle alpha with the central axis L, and the size range is 40 to 45 degrees; the maximum profile surface of the second extension surface forms the maximum outer diameter phi b, and the maximum distance g is formed between the third extension surface and the cutting head, and the ratio of h to g is 1:5.

Preferably, the steel pad comprises a first supporting surface and a second supporting surface which are parallel up and down, the first supporting surface is clung to the third extending surface and is supported by the third extending surface, and the second supporting surface is provided with a centering part protruding out of the second supporting surface.

Preferably, the cross section of the centering portion is triangular.

Preferably, the steel pad is annular and is molded by a thin steel plate, the thickness of the steel pad is f, and the size range is 4-5 mm; having an inner diameter phi j in the size range of 20 to 22mm; the outer diameter phia is in the size range of 45 to 50mm.

Preferably, the rear section is composed of a first guide section, a second guide section, a third guide section and a fourth guide section, the first guide section, the second guide section, the third guide section and the fourth guide section are cylindrical sections with different diameters and lengths, and a groove is formed in the minimum diameter of the third guide section.

Preferably, the steel sleeve is formed by rolling a thin steel plate, and a plurality of stopping parts are arranged on the steel sleeve.

Preferably, the detent engages in a recess of the third guide section to form an interlocking relationship.

Compared with the prior art, through the implementation of the utility model, the following obvious technical effects are achieved:

the utility model can effectively protect the gasket and the tool apron, prolong the service life of the gasket and the tool apron, has good support and stability and can prevent the eccentric wear phenomenon.

The conception and technical effects of the present utility model will be further described with reference to the accompanying drawings to fully understand the objects, features and effects of the present utility model.

Drawings

Fig. 1 is a front view of a high protection chisel with steel pads in a preassembled position according to an embodiment of the utility model;

FIG. 2 is a partial cross-sectional view of A-A of FIG. 1;

FIG. 3 is a front view of a steel pad of a high protection chisel of an embodiment of the utility model in the working position;

fig. 4 is a partial cross-sectional view of a chisel with a high protection feature according to an embodiment of the utility model mounted in a holder.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

Referring to fig. 1-4, a chisel of high protection includes a chisel disposed at least partially within a holder 5 by welding a base 53 to a rotating drum. The chisel is struck with a hammer in the direction F and is mounted into the holder 5 for use. The chisel comprises a cutting head 1, a body 2, a steel sleeve 3 and a steel pad 4, wherein the body 2 comprises a front section, a middle section and a rear section which are coaxially and sequentially arranged from top to bottom, the central axis is L, the cutting head 1 is fixedly arranged at the central position of the end face of the front section, the middle section is provided with an extension part 20, the extension part 20 expands from the central axis L to the diameter direction to form a conical revolving body, the rear section is sleeved with the steel pad 4 and the steel sleeve 3, a movable cavity 30 is arranged between the rear section and the steel sleeve 3, the rear section rotates in the movable cavity, and the steel sleeve 3 is arranged in the retainer 5 and is fixedly connected with the retainer 5.

The cutting head 1 is made of tungsten carbide and is fixed in the center of the front end face by adopting a brazing process, the middle part of the cutting head is provided with a diameter phi e, and the size range is 10-12 mm; and has a length m, with dimensions ranging from 10 to 15mm.

Preferably, the extension portion 20 includes a first extension surface 21, a second extension surface 22, and a third extension surface 23 that are sequentially connected, the third extension surface 23 is a horizontal plane, and the extension portion 20 has a height h in the direction of the central axis L, and has a size ranging from 9 mm to 11mm.

Preferably, the extension 20 has a minimum diameter phic, a maximum diameter phib, and a minimum diameter phic of 30 to 32mm; the maximum diameter phib is 40 to 42mm.

Preferably, the first extension surface 21 forms an included angle α with the central axis L, and the size range is 40 to 45 degrees; the largest contour of the second extension surface 22 constitutes a maximum outer diameter phib, and a maximum distance g, h to g is provided between the third extension surface 23 and the cutting head 1, which ratio is 1:5.

Preferably, the steel pad 4 includes a first supporting surface 40 and a second supporting surface 41 which are parallel to each other, the first supporting surface 40 is closely attached to the third extending surface 23, and supported by the third extending surface 23, and the second supporting surface 41 is provided with a centering portion 42 protruding therefrom.

Preferably, the cross section of the centering portion 42 is triangular.

Preferably, the steel pad 4 is circular and is molded by a thin steel plate, the thickness of the steel pad is f, and the size of the steel pad is in the range of 4-5 mm; having an inner diameter phi j in the size range of 20 to 22mm; the outer diameter phia is in the size range of 45 to 50mm.

Preferably, the rear section is composed of a first guiding section 24, a second guiding section 25, a third guiding section 26 and a fourth guiding section, the first guiding section 24, the second guiding section 25, the third guiding section 26 and the fourth guiding section 27 are cylindrical sections with different diameters and lengths, and the diameter of the third guiding section 26 is minimum to form a groove.

Preferably, the steel sleeve 3 is rolled from a thin steel plate, and a plurality of stopping portions are provided on the steel sleeve 3.

Preferably, the detent engages a recess of the third guide section 26 to form an interlocking relationship.

In fig. 3 and 4, the chisel is struck with a hammer in the direction F and is mounted in the holder 5, the second support surface 41 of the steel pad 4 being in contact with the holding surface 50 of the holder 5, and the working impact of the chisel being carried and transmitted via the holding surface 50. The centring portion 42 of the steel pad 4 is exactly in a matching fit with the receiving portion 51 of the holder 5, thus restricting the range of movement of the chisel in the radial direction. At the same time, the outer surface 32 of the steel sleeve 3 is attached to the inner hole 52 of the retainer 5, and the steel sleeve 3 is rolled by a thin steel plate, so that the steel sleeve has strong elasticity of opening and closing, can be tensioned in the inner hole 52 of the retainer 5, and can be kept in a fixed state. The steel jacket 3 is generally provided at its periphery with three stop portions 31 which are inwardly recessed to form an interlocking relationship with the third guide section 26, the axial restraint of the chisel being dependent upon the action of the stop portions 31. A movable cavity 30 is arranged between the rear section of the chisel body 2 and the inner surface 33 of the steel sleeve 3, and the second, third and fourth guide sections 25, 26, 27 of the body 2 can freely rotate in the steel sleeve 3 due to the existence of the movable cavity 30.

In the case of an actual cutting of the road surface, the reaction force of the road surface against the chisel is transmitted gradually in the direction F from the cutting head 1, and due to the presence of the play required for assembly and working, the body 2 will rock circumferentially in the internal bore 52 of the holder 5, which circumferential rocking is kept in a small range, which is advantageous for working of the chisel. Therefore, the diameter phib of the extension part 20 is close to the outer diameter phia of the steel pad 4 in size, so that radial supporting force is increased, the chisel always keeps smaller circumferential shaking amount in stratum cutting, the work is more stable, and the service life of the retainer 5 is prolonged.

Therefore, the chisel with the high protection characteristic can effectively protect the gasket and the cutter seat, prolong the service life of the chisel, has good support and stability and can prevent the eccentric wear phenomenon.

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the disclosure. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. The utility model provides a high protection characteristic chisel utensil, its characterized in that includes that at least a portion sets up the chisel utensil in the holder, the chisel utensil includes cutting head, body, steel bushing and steel pad, the body is including coaxial and by the anterior segment, middle section and the back end of last setting down in proper order constitute, and the central axis is L, the cutting head fixed set up in anterior segment terminal surface central point puts, the middle section is provided with the extension, the extension expands from central axis L to the diameter direction, constitutes conical solid of revolution, the back end cover is equipped with steel pad and steel bushing, the back end with be provided with the movable chamber between the steel bushing, make the back end is rotatory in it, the steel bushing sets up in the holder and with it fixed connection.

2. The chisel of claim 1 wherein the extension includes a first extension surface, a second extension surface, and a third extension surface connected in sequence, the third extension surface being a horizontal surface, the extension having a height h in the direction of the central axis L and a size in the range of 9-11mm.

3. A high protection performance chisel as claimed in claim 2 wherein said extension has a minimum diameter Φc, a maximum diameter Φb, and a minimum diameter Φc of 30 to 32mm; the maximum diameter phib is 40 to 42mm.

4. A chisel of high protection nature as claimed in claim 3 wherein said first extension forms an angle α with the central axis L, the dimension being in the range 40 to 45 degrees; the maximum profile surface of the second extension surface forms the maximum outer diameter phi b, and the maximum distance g is formed between the third extension surface and the cutting head, and the ratio of h to g is 1:5.

5. A chisel with high protection characteristics according to claim 2, wherein the steel pad comprises a first support surface and a second support surface parallel to each other, the first support surface being in close contact with the third extension surface, the third extension surface supporting the steel pad, the second support surface being provided with a centering portion protruding therefrom.

6. The high protection chisel of claim 5 wherein said centering section is triangular.

7. The chisel of claim 5 wherein said steel pad is annular and molded from a thin steel sheet having a thickness f and a size in the range of 4 to 5mm; having an inner diameter phi j in the size range of 20 to 22mm; the outer diameter phia is in the size range of 45 to 50mm.

8. The chisel with high protection characteristics according to claim 1 wherein the rear section is comprised of a first guide section, a second guide section, a third guide section and a fourth guide section, the first guide section, the second guide section, the third guide section and the fourth guide section being cylindrical sections of different diameters and lengths, the diameter of the third guide section being the smallest forming a groove.

9. The high protection chisel of claim 8 wherein the steel sleeve is rolled from sheet steel, the steel sleeve having a plurality of stops disposed thereon.

10. A high protection chisel as claimed in claim 9 wherein said stop is embedded in said grooves of said third guide section in interlocking relationship.