CN2797632Y

CN2797632Y - Telescopic cutting pick

Info

Publication number: CN2797632Y
Application number: CN 200520090359
Authority: CN
Inventors: 陈艳秋
Original assignee: Sany Heavy Equipment Co Ltd
Current assignee: Sany Heavy Equipment Co Ltd
Priority date: 2005-04-18
Filing date: 2005-04-18
Publication date: 2006-07-19
Anticipated expiration: 2015-04-18

Abstract

The utility model relates to a telescopic cutting pick for an elastic roller. An elastic element is arranged between the head of the telescopic cutting pick and a cutting pick sleeve, a connecting shaft part connected with the head of the telescopic cutting pick is inserted in the cutting pick sleeve, the extending end of the connecting shaft part is extended to the outer side of the end face of the cutting pick sleeve, a regulating nut on the outer side of the end face of the cutting pick sleeve is installed on the extending end of the connecting shaft part and is connected with the extending end through screw threads, and the regulating nut is contacted and connected with the end face of the cutting pick sleeve. The telescopic cutting pick effectively regulates and controls the maximum cutting resistance of the telescopic cutting pick through the preset elastic preload, cutting force is smaller than the pretightening force of a spring in the process of normally cutting, and the telescopic cutting pick can not be changed; when the utility model encounters hard rock, the cutting resistance is larger than the pretightening force of the spring, the telescopic cutting pick is shrank along an axial direction, cutting length is reduced, the cutting force is also correspondingly reduced, therefore the utility model automatically controls the cutting force and protects the telescopic cutting pick. The utility model can effectively protect the telescopic cutting pick from being broken under accidental conditions, ensure the equal service life of the telescopic cutting pick and effectively reduce the harmful effect of shock load to a roller.

Description

The scalability pick

Technical field

The utility model relates to cutting means, is specially a kind of telescopic elastic drum pick, and its concrete function is the effect of finishing coal breakage in coal machine coal cutting process.

Background technology

At present, being generally pure between pick on the coal mining machine roller and the pick box is rigidly connected.Its function is the rotation along with cutting drum, realizes the coal petrography cut.Because it is the coal petrography fragmentation mostly is shock loading, bigger to the vibratory impulse influence of coal machine integral body; The coal geology structure is comparatively complicated simultaneously, and pick can run into unexpected hard rock situation unavoidably in the cut process, make pick that abnormal spoilage often take place, and causes the stress of whole cylinder to become badly, influences the service behaviour of complete machine, reduces application life.

The utility model content

In order to solve the problem that the pick breakage is brought, the utility model provides a kind of scalability pick, and the maximum resistance of pick institute energy cut be regulated and be controlled to this pick can effectively by setting certain elastic preload.

The technical solution of the utility model is:

A kind of scalability carries tooth, between pick head and the pick cover flexible member is housed, the axial region that is connected that links to each other with the pick head is plugged in the pick cover, the external part that connects axial region is to the pick cover end face outside, adjusting nut is installed in the external part that connects axial region, with this external part by being threaded, adjusting nut is connected with the contact of pick cover end face.

Described connection axial region is the multidiameter structure.

Described connection axial region is the multidiameter structure that square shaft and circular shaft are formed by connecting, the square opening of pick cover endoporus for matching with square shaft, flexible member is enclosed within on the circular shaft that connects axial region, be installed between square shaft bottom surface and the pick cover bottom surface, connect axial region and pass the pick cover, its external part is to the pick box outside, and adjusting nut is installed in the external part that connects axial region, with this external part by being threaded, adjusting nut is connected with the contact of pick box lateral surface.

Described flexible member adopts butterfly spring or coil tension spring.

The beneficial effects of the utility model are:

1, the utility model provides a kind of elastic preload pick, and the maximum resistance of pick cutting is regulated and controlled to this pick effectively by preestablishing elastic preload.Because flexible member is between pick head and pick cover, when in normal cut process, clipping force is less than the pretightning force of spring, and pick does not change; When running into hard rock, cutting resistance is greater than the pretightning force of spring, and pick shrinks vertically, and cut length diminishes, and clipping force also reduces accordingly, thereby reaches the purpose of automatic control clipping force and protection pick.Thisly control the stressed method of pick and can protect the breakage of pick under unexpected situation effectively, guarantee the phase equivalent life of pick, effectively reduce the harmful effect of shock loading cylinder by adjusting cut length.

2, the utility model can be applied to the field such as coal-winning machine, development machine, coal plough of coal industry.

Description of drawings

Fig. 1-2 is one of a utility model schematic diagram; Wherein, Fig. 1 is a sectional drawing, and Fig. 2 is a stereogram.

Fig. 3-4 is another schematic diagram of the utility model; Wherein, Fig. 3 is a sectional drawing, and Fig. 4 is a stereogram.

Among the figure, 1. pick head; 2. pick box; 3. adjusting nut; 4. flexible member; 5. spring collar; 6. pick cover; 7. connection axial region.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

Shown in Fig. 1-2, pick head 1 and pick cover 6 be connected the structure that axial region 7 is designed to multidiameter, flexible member 4 is enclosed within and connects on the axial region 7, and between pick head 1 and pick cover 6, the lower end diameter that connects axial region 7 diminishes, there is external screw thread on the surface, and the end of screw thread is equipped with setscrew nut 3, and setscrew nut 3 is used for limiting the pretightning force of one-sided axially-movable and adjusting flexible member 4.When in normal cut process, clipping force is less than the pretightning force of spring, and pick does not change; When running into hard rock, cutting resistance is greater than the pretightning force of spring, and pick shrinks vertically, and cut length diminishes, and clipping force also reduces accordingly, thereby reaches the purpose of control clipping force and protection pick.Thisly control the stressed method of pick and can protect the breakage of pick under unexpected situation effectively, guarantee the phase equivalent life of pick by adjusting cut length.Flexible member 4 adopts butterfly spring in the present embodiment.

Flexible member 4 is enclosed within the connection axial region 7, and then with pick cover 6 be installed on pick and overlap spring collar 5 on 6 and pack into and be connected in the axial region 7, adjusting nut 3 is installed in connection external screw thread place, axial region 7 lower end, by the adjusting nut position, pick cover 6, flexible member 4, pick head 1 are applied external force, thereby obtain the required pretightning force of pick head 1, at last the pick that regulates is inserted in the pick box 2 with other element.

As shown in Figure 3-4, the axial region 7 that is connected of pick head 1 and pick cover 6 is made the multidiameter structure that square shaft and circular shaft are formed by connecting, flexible member 4 is enclosed within on the circular shaft that connects axial region 7, pick overlaps the square opening of 6 endoporus for matching with square shaft, keep relative static (the no relative motion) of spring and pick by the square-section, thereby prevent the wearing and tearing of spring effectively.The axial location of pick head 1 is finished by pick box 2 outer adjusting nuts 3, connects the pretension that part is adjusted flexible member by the external screw thread that connects the circular shaft end on the axial region 7.Flexible member 4 adopts coil tension spring in the present embodiment.

With pick cover 6 be installed on spring collar 5 on the pick cover 6 and pack in the pick box 2, flexible member 4 is put in pick overlaps 6 bottoms, to connect in the square hole of axial region 7 insertion pick covers 6, spring is overlapped between 6 bottoms at the square shaft bottom surface and the pick that connect axial region 7, adjusting nut 3 in pick box 2 outsides, be installed in and connect external screw thread place, axial region 7 lower end, by the adjusting nut position, obtain the required pretightning force of pick head 1.

The course of work of the present utility model is as follows:

When the normal coal cutting of cylinder, pick is subjected to the coal petrography resistance in the pretension scope of flexible member, and pick does not axially have telescopic variation, normal cut.When running into local hard rock, cutting resistance exceeds the pretightning force of flexible member, and pick shortens vertically, and cut length is regulated automatically and diminished; When running into normal coal petrography, pick returns to the normal position again.Whole process keeps that pick is stressed to be controlled effectively within the specific limits.

Claims

1, a kind of scalability pick, it is characterized in that: between pick head (1) and the pick cover (6) flexible member (4) is housed, the axial region (7) that is connected that links to each other with pick head (1) is plugged in pick cover (6), the external part that connects axial region (7) is to pick cover (6) the end face outside, adjusting nut (3) in pick cover (6) the end face outside, be installed in the external part that connects axial region (7), with this external part by being threaded, adjusting nut (3) is connected with the contact of pick cover (6) end face.

2, according to the described scalability pick of claim 1, it is characterized in that: described connection axial region (7) is the multidiameter structure.

3, according to the described scalability pick of claim 1, it is characterized in that: described connection axial region (7) is the multidiameter structure that square shaft and circular shaft are formed by connecting, the square opening of pick cover (6) endoporus for matching with square shaft, flexible member (4) is enclosed within on the circular shaft that connects axial region (7), be installed between square shaft bottom surface and the pick cover bottom surface, connect axial region (7) and pass pick cover (6), its external part is to pick box (2) outside, adjusting nut (3) is in pick box (2) outside, be installed in the external part that connects axial region (7), with this external part by being threaded, adjusting nut (3) is connected with the contact of pick box (2) lateral surface.

4, according to the described scalability pick of claim 1, it is characterized in that: described flexible member (4) adopts butterfly spring or coil tension spring.