CN212477383U

CN212477383U - Chisel knife

Info

Publication number: CN212477383U
Application number: CN202020956167.6U
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: 2020-05-31
Filing date: 2020-05-31
Publication date: 2021-02-05
Anticipated expiration: 2030-05-31

Abstract

The scheme provides a chisel, including chisel tip, chisel holding portion, the holder, spacing dish, around the central axis L of spacing dish forms the hole that has the annular face, spacing dish is equipped with at least a round recess in its one side, the recess is run through by the hole, spacing dish has a holding surface, first terminal surface, the recess passes through to first terminal surface by the holding surface, have the bearing portion on the holder, the recess with the bearing portion meshing. The chisel tool of present case can keep optimized rotation cutting performance, transmit operating pressure more effectively at the during operation, can prolong the life of chisel tool.

Description

Chisel knife

Technical Field

The utility model belongs to a mechanical equipment field for ground maintenance especially relates to a chisel with spacing dish in center.

Background

Shank chisel blades are known for use in ground-based maintenance machines, such as milling drums of road milling machines, road recyclers or the like; the knife tip of chisel is its main work portion, with the road substrate direct contact that needs the planing off, so the handle chisel structure has the key effect to the cutting effect of chisel, however, the handle chisel among the prior art is limited to conventional shape and part structure, and the chisel rotation is not smooth in the use, and the rotational speed is not enough, causes the eccentric wear, and the life-span is short, wear-resisting material rate of utilization is low, and work efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects of the prior art, the present invention aims to provide a chisel with a central limiting disc, which can maintain the optimized rotary cutting performance, transmit the working pressure more effectively and prolong the service life of the chisel.

In order to achieve the above object, the present invention provides a chisel, including chisel tip, chisel holding portion, holding seat, spacing dish, center on the central axis L of spacing dish forms the hole that has the annular face, spacing dish is equipped with at least round recess in its one side, the recess is run through by the hole, spacing dish has holding surface, first terminal surface, the recess passes through to first terminal surface by the holding surface, the holding seat is last to have the bearing portion, the recess with the meshing is held mutually in the bearing portion.

Preferably, the chisel blade, wherein the groove on the stop disk forms an annular groove around the central axis L.

Preferably, the chisel edge, wherein the pilot surface of the recess extends along the central axis L in such a way that it is inclined from the support surface to the first end surface.

Preferably, the chisel blade, wherein the guide surface is directly or transitionally connected to the support surface and the first end surface.

Preferably, the chisel blade, wherein the leading face is circumferentially disposed at an angle α to the central axis L, and the angle α is 1 ° to 89 °.

Preferably, the chisel blade, wherein the support portion has a first receiving surface, and the first end surface is in contact fit with the first receiving surface.

Preferably, in the chisel, the support portion has a locking surface and a second receiving surface, and the locking surface is in clearance fit with the guide surface; the second receiving surface is in clearance fit with the supporting surface.

Preferably, the chisel blade, wherein the support surface is spaced from the first end surface by a distance a, the second end surface is spaced from the first end surface by a distance b, the ratio of the distance b to the distance a is greater than 2, and the ratio of the diameter D1 of the hole to the distance a is greater than 6.

Preferably, the chisel edge, wherein the distance a between the support surface and the first end surface is 0.5mm to 3 mm.

Preferably, the chisel is provided with a distance b between the second end surface and the first end surface of 3.5mm-10 mm.

Compared with the prior art, through the utility model discloses an implement, reached following obvious technological effect:

the chisel with the spacing dish in center of present case has used simpler, the spacing dish of easier machine-shaping, and optimized mechanical structure, make the recess of spacing dish fully contain the bearing portion of keeping the seat, the chisel obtains the assurance of maximize with the axiality that keeps the seat position like this, the chisel can keep the rotary cutting performance of optimization at the during operation, and, spacing dish lead the face, holding surface and first terminal surface respectively with the locking surface that keeps the seat, second acceptance surface and first acceptance surface correspond respectively, the lifting surface who corresponds has increased, transmit operating pressure more effectively, the life of chisel has been prolonged.

The concept, specific mold cavity and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features and effects of the present invention.

Drawings

Figure 1 is a half cross-sectional view of the chisel of the present invention mounted in a holder;

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

FIG. 3 is a partial cross-sectional view B of FIG. 1;

figure 4 is a full cross-sectional view of the chisel stop disk of the present invention;

FIG. 5 is a partial cross-sectional view of the support portion of the holder of FIG. 1;

figure 6 is a working deflected perspective view of the chisel of the present invention mounted in a holder.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.

Fig. 1 to 3 show a front side view of the chisel 1 mounted in the holder 3, wherein fig. 2 and 3 respectively enlarge partial views a and B, wherein the limiting disk 2, the holder 3 and the clamping bushing 4 are shown in a half-section. The chisel 1 comprises a head 12 made of tungsten-cobalt hard metal permanently fixed by brazing in a blind-hole shaped molten bath at the chisel end 11. The chisel holding portion 10 extends below the chisel end 11 and is formed of a cylinder having a diameter smaller than the chisel end 11. The chisel holder 10 is sleeved with a limiting disc 2, the upper end face of the limiting disc 2 is tightly attached to the plane 11.1 of the chisel end 11, and the lower end face 2.6 of the limiting disc 2 is tightly attached to the abutting face 3.5 of the holder 3. The fastening steel sleeve 4 is usually made of a thin steel plate in a rolling mode, has certain elasticity, is provided with an opening and has a proper length, is sleeved in the retaining handle 20, the retaining handle 21 and the retaining handle 22 of the chisel holder 10, a plurality of inner recesses 4.1 are machined on the surface of the retaining handle 21 by using a stamping process and matched in the retaining handle, the fastening steel sleeve 4 is pressed into the installation through hole 14 of the retaining base 3, the outer side surface of the fastening steel sleeve is expanded and tightly pressed in the installation through hole 14 of the retaining base 3, and the fastening steel sleeve is kept in fixed contact with the retaining handle.

The scheme provides a chisel 1, which comprises a chisel end 11, a chisel holding part 10, a holding seat 3 and a limiting disc 2, wherein a hole 13 with an annular surface 2.2 is formed around the central axis L of the limiting disc 2, the limiting disc 2 is provided with at least one circle of groove 2.4 on one side, the groove 2.4 is penetrated through by the hole 13, the limiting disc 2 is provided with a supporting surface 2.5 and a first end surface 2.6, the groove 2.4 is transited from the supporting surface 2.5 to the first end surface 2.6, the holding seat 3 is provided with a supporting part 3.4, and the groove 2.4 is meshed with the supporting part 3.4.

As shown in fig. 2, in the actual operating state, the recess 2.4 of the limiting disk 2 is configured to engage with the bearing portion 3.4 of the holder 3. The holder 3 is "fixed" in terms of relative movement, and the bearing portion 3.4 of the holder 3 is "fixed", the recess 2.4 of the chisel holder disk 2 being configured to engage the bearing portion 3.4 of the holder 3 for maximum concentricity with the position of the holder 3.

The groove 2.4 on the limiting disc 2 forms an annular groove shape around the central axis L.

The leading face 2.3 of the recess 2.4 extends along the centre axis L in an inclined manner from the support face 2.5 towards the first end face 2.6. The guide surface 2.3 is connected to the first end surface 2.6 by the support surface 2.5 and extends obliquely therefrom.

The guide front surface 2.3 is connected directly or transitionally to the support surface 2.5 and the first end surface 2.6.

The front guide surface 2.3 and the central axis L are circumferentially arranged at an included angle alpha which is 1-89 degrees. The angle α is preferably between 30 ° and 50 °, particularly preferably between 40 ° and 50 °. The chisel limit disc is made of a steel mold, and a die drawing angle needs to be made on the side of the groove in the mold discharging direction, namely the direction of the central axis L, so that the limit disc can be smoothly pushed out of a mold cavity.

The bearing part 3.4 has a first receiving surface 3.5, and the first end surface 2.6 is in contact fit with the first receiving surface 3.5.

The supporting part 3.4 is provided with a locking surface 3.2 and a second receiving surface 3.3, and the locking surface 3.2 is in clearance fit with the pilot surface 2.3; the second receiving surface 3.3 is a clearance fit with the support surface 2.5.

The locking surface 3.2 and lead positive 2.3 clearance fit, locking surface 3.2 and lead positive 2.3 and have certain clearance value x, the value of clearance x is within 0.01mm to 0.05mm, can make spacing dish 2's recess 2.4 completely include the support 3.4 that keeps seat 3 like this, the spacing dish of chisel knife 2 and keep seat 3 take place certain ground after separating in work, also can resume original relative position state fast, the phenomenon of jamming can not take place in spacing dish 2 rotation.

The second receiving surface 3.3 is in clearance fit with the supporting surface 2.5, the clearance value c is equal to the distance c between 0.4mm and 2.9mm, and the first receiving surface 3.5 and the first end surface 2.6 caused by machining errors are prevented from being in contact with each other, so that the first receiving surface 3.5 and the first end surface 2.6 are further ensured to be in contact fit with each other, if the first receiving surface 3.5 and the first end surface 2.6 are not in contact with each other, the working pressure borne by the chisel 1 and the chisel limiting disc 2 can not be effectively transmitted to the retaining seat 3, the working lives of the chisel 1 and the chisel limiting disc 2 are greatly influenced, and the chisel 1 and the chisel limiting disc 2 can be damaged under large impact force.

Fig. 3 shows that the contour surface 10.1 of the chisel holder 10 has a clearance y with the hole 13 of the limiting disk 2, the clearance y being within a range of 0.01mm to 0.1 mm; the clearance value z exists between the contour surface 20.1 of the holding handle 20 and the inner surface 4.2 of the fastening steel sleeve 4, the value of the clearance z is within 0.05mm to 0.2mm, and the clearance values x, y and z are set and controlled to fully utilize the action of the limiting disc 2, so that the coaxiality between the central axis L2 of the chisel 1 and the central axis L1 of the holding seat 3 is kept to the maximum extent in the working and rotating process, and the service performance and the service life of the chisel 1 are improved.

As can be seen from fig. 4, the stopping disk 2 has a groove 2.4 on one side, the groove 2.4 is penetrated by a hole 13, the hole 13 is formed around the central axis L of the stopping disk 2 and has a diameter D1, the supporting surface 2.5 has a distance a from the first end surface 2.6, the second end surface 2.1 has a distance b from the first end surface 2.6, the ratio of the distance b to the distance a is greater than 2, and the ratio of the diameter D1 to the distance a of the hole 13 is greater than 6. By selecting the optimal size proportion, the mechanical structure can be optimized. The diameter D1 of the hole 13 is sized within the range of 15mm to 25 mm; the upper diameter D2 of the groove 2.4 is of a size in the range 30mm to 35 mm; the lower diameter D3 of the groove 2.4 is sized within the range of 40mm to 45 mm; the outer diameter D4 of the spacing disc 2 is dimensioned within the range of 50mm to 55 mm.

The distance a between the support surface 2.5 and the first end surface 2.6 is 0.5mm-3 mm.

The distance b between the second end face 2.1 and the first end face 2.6 is 3.5mm-10 mm. Through the actual use condition of long-term research chisel limit disc, obtained the best size scope, both can effectual assurance chisel result of use and life-span, can hold the use amount of good material again, be unlikely to cause the waste of material, use cost's promotion combines result of use and material cost maximize, reaches balance and unity between them.

As shown in fig. 5, the support portion 3.4 of the holder 3 extends from the abutment surface 3.5 side to form a circular boss shape terminating with the receiving surface 3.3 as a longitudinal terminating surface and with the transition surface 3.2 as a diametrical terminating surface, and a mounting through-hole 14 having a diameter d1 in a size range of 15mm to 25mm is formed around the central axis L1 of the holder 3; the upper diameter of the transition surface 3.2 is d2 and the size range is 29mm to 34 mm; the lower diameter of the transition surface 3.2 is d3 and the size range is 39mm to 44 mm; the outer diameter d4 of the retaining socket 3 is dimensioned within the range of 50mm to 55 mm. And the distance c between the receiving surface 3.3 and the force-receiving surface 3.5 of the bearing part 3.4 has a value within 0.4mm and 2.9 mm.

Fig. 6 shows a front side view of the chisel 1 mounted in the holder 3, the central axis L1 of the holder 3 forming an angle β with the central axis L of the limiting disk 2, the value of which is in the range of 0.01 ° to 0.15 °; the central axis L of the limiting disc 2 and the central axis L2 of the chisel 1 form an included angle θ, and the numerical range is 0.05 ° to 0.2 °. Chisel 1 will keep high-speed rotatory in the mounting hole 14 that keeps seat 3, and the central axis L2 of chisel 1 needs the at utmost in the rotatory in-process of work the axiality of the central axis L1 that keeps seat 3 for this reason, is favorable to improving the performance of chisel 1, and spacing dish 2 has produced vital effect to improving aforementioned axiality between them consequently, has realized the beneficial effects of the utility model.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A chisel (1) comprising a chisel end (11), a chisel holder (10), a holder (3), a limiting disk (2) having a hole (13) with an annular surface (2.2) formed around a central axis L of the limiting disk (2), the limiting disk (2) being provided with at least one turn of a groove (2.4) on one side thereof, the groove (2.4) being penetrated by the hole (13), the limiting disk (2) having a support surface (2.5), a first end surface (2.6), the groove (2.4) transitioning from the support surface (2.5) to the first end surface (2.6), the holder (3) having a support portion (3.4), the groove (2.4) engaging with the support portion (3.4).

2. Chisel (1) according to claim 1, characterized in that the recess (2.4) in the limiting disk (2) forms an annular groove around the central axis L.

3. Chisel (1) according to claim 1, characterized in that the leading face (2.3) of the recess (2.4) extends along the central axis L in an inclined manner from the support face (2.5) to the first end face (2.6).

4. Chisel (1) according to claim 3, characterized in that the guide front face (2.3) is connected directly or transitionally to the support face (2.5) and the first end face (2.6).

5. Chisel (1) according to claim 4, characterized in that the guide front face (2.3) is arranged circumferentially at an angle α to the central axis L, and that the angle α is 1 ° to 89 °.

6. Chisel (1) according to claim 1, characterized in that the support part (3.4) has a first receiving surface (3.5), the first end surface (2.6) being in contact engagement with the first receiving surface (3.5).

7. Chisel (1) according to claim 1, characterized in that the support (3.4) has a locking surface (3.2) and a second receiving surface (3.3), the locking surface (3.2) being a clearance fit with the guide surface (2.3); the second receiving surface (3.3) is in clearance fit with the supporting surface (2.5).

8. Chisel (1) according to claim 1, characterized in that the support surface (2.5) has a distance a from the first end surface (2.6), the second end surface (2.1) has a distance b from the first end surface (2.6), the ratio between distance b and distance a being larger than 2, and the ratio between the diameter D1 of the hole (13) and distance a being larger than 6.

9. Chisel (1) according to claim 8, wherein the distance a between the support surface (2.5) and the first end surface (2.6) is 0.5mm to 3 mm.

10. Chisel (1) according to claim 8, wherein the distance b between the second end surface (2.1) and the first end surface (2.6) is 3.5mm to 10 mm.