CN205154158U

CN205154158U - Self -locking pick

Info

Publication number: CN205154158U
Application number: CN201520981783.6U
Authority: CN
Inventors: 宋耀强; 赵东; 蔡海燕
Original assignee: Zhuzhou Cemented Carbide Group Co Ltd
Current assignee: Zhuzhou Cemented Carbide Group Co Ltd
Priority date: 2015-12-02
Filing date: 2015-12-02
Publication date: 2016-04-13
Anticipated expiration: 2025-12-02

Abstract

The utility model relates to a self -locking pick, including the pick body with fix the carbide tooth at pick body head, the carbide tooth includes cone work portion and carbide denticle, the carbide denticle be cylindrical, is equipped with convex edge more than three or three along the axial on the carbide denticle, edge and carbide denticle axis are certain contained angle, division there is the groove with edge matched with the inboard corresponding edge position of pick body mounting hole. The utility model discloses both guarantee the firm joint of the pick body and carbide tooth, guaranteed pick shocking resistance when using, antitorque qu nengli, avoided the problem that traditional welding process and pick working process fall the tooth easily again.

Description

A kind of self-locking pick

Technical field

The utility model relates to a kind of digging apparatus, is specifically related to a kind ofly to excavate for mine, highway etc., tunnels, broken pick.

Background technology

Pick is made up of pick body and the hard-metal insert being fixed on pick body head.Present stage, the structure of pick roughly had following four kinds:

The first structure is extensively sold in the market, and hard-metal insert and pick body mating part are cylinder, and hard-metal insert is fixed by welding in the installing hole of pick body head; This structure need be welded, and not only solder flux cost is higher, and welding process alloy performance also has considerable influence; Welding tooth is be connected by solder due to carbide alloy and steel matrix, affects comparatively large by welding quality, and use procedure is easily turned around and broken tooth.

The second structure is as described in patent CN203742599 " a kind of carbide alloy pick " or CN204225884U " pick carbide head ", and hard-metal insert is provided with groove or screw thread, to be installed be connected with pick body by snap ring mode or screw thread; This kind of structure hard alloy denticle needs fluted or opens screw thread, and carbide alloy to be powder vertically compressing, transverse concave groove or screw thread cannot be compressing, only have to go out groove to carbide alloy following process, and carbide alloy is difficult to processing, and cost is very high.

The third structure is described in patent CN1951627A " a kind of manufacturing technique method of pick ", and hard-metal insert and pick body mating part have the tapering of 1:20 ~ 1:5, by the pick heats forged installed, is closed up by forging alloy; In forging process, pick body opening root easily produces tensile stress, pick body cracking after causing quenching; Excessive angle can cause larger extruding force, thus easily makes hard-metal insert depart from pick body baseplane, once hard-metal insert is unsettled, should have intensity by or else ensureing in follow-up use procedure.

4th kind of structure is as described in patent CN101876251A " welding-free cutting bit ", and the mounting portion of hard-metal insert is cone, cone angle 1.0 ~ 5.6 °; The installing hole of pick body head is the conical bore consistent with the mounting portion shape of hard alloy head, and side and the end of the side of installing hole and bottom and hard-metal insert mounting portion fit tightly.The perforate of pick body forms interior large outer 1.0 ~ 5.6 ° of little cone angles and processes very difficult, and conventional processing mode is difficult to realize at present; Due to opening reason, carbide alloy is difficult to be pressed into pick hole, and because of reasons such as machining accuracies, even if press-in, carbide alloy also cannot realize and the combining closely of pick body.

Summary of the invention

The purpose of this utility model is the defect overcoming said structure, a kind of pick is provided, the firm engagement of pick body and hard-metal insert can be ensured, guarantee pick shock resistance in use, distortion resistance, solve again the problem that traditional welding procedure and the pick course of work easily fall tooth.

Technical solution of the present utility model is as follows: a kind of self-locking pick, comprise pick body and the hard-metal insert being fixed on pick body head, hard-metal insert comprises cone operate portions and carbide alloy denticle, carbide alloy denticle is cylindrical, carbide alloy denticle is provided with vertically more than three or three seamed edges protruded, seamed edge and hard-metal insert body axis in a certain angle, inside pick body installing hole, corresponding seamed edge position has the groove matched with seamed edge.

Further, seamed edge is symmetrical arranged along carbide alloy denticle circumference.

Preferably, seamed edge and carbide alloy denticle axially form the gradient of 0.5 ~ 6.0 °.

Preferably, end land width is 0.2 ~ 0.3 times of hard-metal insert denticle diameter.

Preferably, seamed edge is crossing with hard-metal insert cone operate portions, and is circular arc or chamfered transition bottom carbide alloy denticle.

Preferably, hard-metal insert cone operate portions cone angle is 60 ~ 130 °.

The aperture of described pick body installing hole and carbide alloy denticle cylinder diameter consistent size.

As improvement, bottom pick body installing hole and between carbide alloy denticle bottom surface, be also provided with metallic gasket.

The self-locking pick that the utility model provides is when assembling, first put into metallic gasket in pick body aperture bottom, hard-metal insert is when being pressed into pick perforate, seamed edge aligns with fluting, after alloy press-in, the fluting of alloy and pick body, the face of cylinder and bottom metal pad formed mutual support combine closely and lock.Because hard-metal insert installs the seamed edge that compressed portion has band tapering, and pick body installing hole has the groove of corresponding tapering, adds buffering and the supporting role of the metallic gasket of pick aperture bottom, thus achieves the firm engagement of pick body and hard alloy head.

The utility model has the advantages that hard-metal insert and pick body form self-locking effect by the seamed edge with certain angle, both ensure that the firm engagement of pick body and hard-metal insert, guarantee pick shock resistance in use, distortion resistance, avoid again the problem that traditional welding procedure and the pick course of work easily fall tooth, the processing and forming of hard-metal insert is easy, and cost is low.

utility model explanation

Fig. 1 is the structural representation of the utility model detailed description of the invention.

Fig. 2 is the sectional drawing of A-A position in Fig. 1.

Fig. 3 is the schematic top plan view of the hard-metal insert of a detailed description of the invention.

Fig. 4 is the elevation of Fig. 3.

Fig. 5 is the sectional drawing of B-B position in Fig. 4.

Detailed description of the invention

Below to be further described the utility model by reference to the accompanying drawings.Definition " on " be cone operate portions 21 one end, D score is carbide alloy denticle 22 one end.

As shown in Figure 1 and 2, the self-locking pick that the utility model detailed description of the invention provides, is made up of pick body 1 and the hard-metal insert 2 being fixed on pick body head.Hard-metal insert 2 comprises cone operate portions 21 and carbide alloy denticle 22.Hard-metal insert cone operate portions 21 cone angle is preferably 60 ~ 130 °.

As shown in Fig. 3 ~ 5, carbide alloy denticle 22 is cylindrical, and shown in the seamed edge 23(figure being provided with more than three or three vertically, embodiment is four symmetrical seamed edges).Seamed edge 23 and carbide alloy denticle 22 axis (vertical angles for cone angle shown in Fig. 4) in a certain angle, be that angle summit (makes seamed edge 23 upper end thickness be less than lower end thickness) above.Preferably, seamed edge 23 and carbide alloy denticle 22 axially form the gradient of 0.5 ~ 6.0 ° (numerical value of α).Seamed edge 23 width (the width d in Fig. 4) is preferably 0.2 ~ 0.3 times of carbide alloy denticle 22 diameter.Seamed edge 23 is crossing with hard-metal insert cone operate portions 21, and bottom carbide alloy denticle 22 is circular arc or chamfered transition (as shown in Figure 4).

The aperture of pick body 1 installing hole and carbide alloy denticle 22 cylinder diameter consistent size.Inside pick body 1 installing hole, corresponding seamed edge 23 position has the groove 11 matched with seamed edge 23.

As further improvement, bottom pick body 1 installing hole and between carbide alloy denticle 22 bottom surface, be also provided with metallic gasket 3, to the effect that hard-metal insert forms buffering and supports.

When assembling, first put into metallic gasket 3 in pick body 1 aperture bottom, hard-metal insert 2 is when being pressed into pick body 1 perforate, seamed edge 23 aligns with fluting 11, after hard-metal insert 2 is pressed into, the fluting 11 of hard-metal insert 2 and pick body 1, the face of cylinder and bottom metal pad 3 formed support mutually combine closely and lock.

Claims

1. a self-locking pick, comprise pick body and the hard-metal insert being fixed on pick body head, hard-metal insert comprises cone operate portions and carbide alloy denticle, it is characterized in that: carbide alloy denticle is cylindrical, carbide alloy denticle is provided with vertically more than three or three seamed edges protruded, seamed edge and hard-metal insert body axis in a certain angle, inside pick body installing hole, corresponding seamed edge position has the groove matched with seamed edge.

2. self-locking pick according to claim 1, is characterized in that seamed edge is symmetrical arranged along carbide alloy denticle circumference.

3. self-locking pick according to claim 1 and 2, is characterized in that seamed edge and carbide alloy denticle axially form the gradient of 0.5 ~ 6.0 °.

4. self-locking pick according to claim 1 and 2, is characterized in that end land width is 0.2 ~ 0.3 times of hard-metal insert denticle diameter.

5. self-locking pick according to claim 1 and 2, is characterized in that seamed edge is crossing with hard-metal insert cone operate portions, and is circular arc or chamfered transition bottom carbide alloy denticle.

6. self-locking pick according to claim 1, is characterized in that hard-metal insert cone operate portions cone angle is 60 ~ 130 °.

7. self-locking pick according to claim 1, is characterized in that aperture and the carbide alloy denticle cylinder diameter consistent size of pick body installing hole.

8. the self-locking pick according to claim 1,2,6 or 7, is characterized in that also being provided with metallic gasket bottom pick body installing hole and between carbide alloy denticle bottom surface.