CN217501646U - Anti-lost pick drill bit - Google Patents

Abstract

The utility model belongs to the technical field of the pick, concretely relates to prevent losing pick drill bit. The problem that cutting teeth of a coal mining machine are frequently lost when a roller rotates is solved. The utility model discloses a pick, tooth cover and hole are with steel wire retaining ring, the pick includes pick head and pick holder, be provided with the pick slot on the pick holder, the tooth cover inner wall is provided with the tooth cover slot, utilizes hole to use steel wire retaining ring's elasticity, still makes the pick have certain axial float when carrying out spacingly to the pick. The utility model discloses a change original fixed pick's elastic sleeve for the hole wire retainer ring, make the pick have certain axial float, promoted coal mining efficiency, solved the phenomenon that the pick lost of coal-winning machine when the cylinder is rotatory.

Description

Anti-lost pick drill bit

Technical Field

The utility model belongs to the technical field of the pick, concretely relates to prevent losing pick drill bit.

Background

The cutting pick is a cutting part of a coal cutter for cutting a coal bed, is fixed on a roller of the coal cutter through a tooth sleeve and a tooth holder, and completes cutting of the coal bed along with rotation of the roller.

In actual work, gangue and even rock are inevitably present in a coal bed, so that the cutting pick not only bears compressive stress to complete a cutting task, but also has impact performance to complete a crushing function on the coal bed, the gangue, the rock and the like. Therefore, in the installation of an actual cutting pick, it is required to allow some axial play to meet the impact performance requirements.

Because the pick needs to have certain axial float, and for making pick uniform wear, still need to be rotatable in the circumferencial direction, so on the cooperation of pick and tooth cover, generally adopt clearance fit, for the activity of restriction pick, realize through the frictional force between elastic sleeve and tooth cover. Because the clearance tolerance and the elastic sleeve tension degree are different, in practical application, the phenomenon that the cutting teeth are lost frequently occurs along with the high-speed rotation of the roller.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent losing pick drill bit to solve the problem of losing when coal-winning machine pick is rotatory along with the cylinder, satisfy the pick simultaneously and have certain axial float, simple installation, it is easy and simple to handle, accord with coal mining actual demand.

The utility model adopts the technical scheme as follows:

the utility model discloses a pick, tooth cover and hole are with steel wire retaining ring, pick adopt clearance fit embedding in the tooth cover, under the effect of external force, can rotate, the pick includes pick head and pick holder, be provided with the pick slot on the pick holder, the tooth cover inner wall is provided with the tooth cover slot, and hole is with steel wire retaining ring installs between pick slot and tooth cover slot. In order to limit the movement of the cutting teeth, the friction force limit between the original elastic sleeve and the tooth sleeve is changed into the limit of a hole steel wire retainer ring, so that the limit reliability is improved, and the installation is more convenient.

Preferably, the cutting pick is rotationally connected with the pick sleeve, and the cutting pick can rotate in the circumferential direction, so that the cutting pick is uniformly abraded, and the service life of the cutting pick is prolonged.

Preferably, the front end of the tooth sleeve groove is provided with a chamfer angle which is 15 degrees relative to the horizontal direction, so that a cutting tooth can be conveniently taken out and replaced.

Preferably, the cutting tooth groove and the tooth sleeve groove are both annular grooves, and after the cutting tooth is installed, a space is formed between the cutting tooth groove and the tooth sleeve groove and can be used for axial movement of the steel wire retainer ring for the hole.

Preferably, the wire retainer ring for hole is the elastic opening ring, utilizes the elasticity of wire retainer ring for hole, and its compression minimum diameter after tightening up is not more than pick holder outer wall diameter, and the maximum diameter after relaxing the inflation is not less than the tooth cover slot inner wall diameter, blocks the wire retainer ring for hole through tooth cover slot wall and pick slot wall, has prevented the removal of pick, and it is spacing to the pick, makes the pick have certain axial float, satisfies the impact performance requirement, has effectively avoided the problem that the pick lost.

Preferably, the cutting pick head is made of hard alloy materials, is high in strength and strong in compressive stress bearing capacity, has impact performance, can effectively cut and crush coal seams, waste rocks, rocks and the like, and improves coal mining efficiency.

In conclusion, due to the adoption of the technical scheme, the utility model has the beneficial effects that;

1. the friction force between the original elastic sleeve and the gear sleeve is limited by the steel wire check ring for the hole, so that the limiting reliability is improved, and the installation is more convenient.

2. The cutting pick is embedded in the pick sleeve in a clearance fit mode, and under the action of external force, the cutting pick can rotate in the circumferential direction, so that the cutting pick is uniformly abraded, and the service life of the cutting pick is prolonged.

3. The front end of the tooth sleeve groove is provided with a chamfer angle which is 15 degrees with the horizontal direction, so that a cutting tooth can be conveniently taken out and replaced.

4. Pick slot and tooth cover slot are annular slot, and the pick installation back that finishes forms a space between pick slot and the tooth cover slot, can supply the axial float of steel wire retainer ring for the hole.

5. The hole-used steel wire retainer ring is an elastic opening ring, the elasticity of the hole-used steel wire retainer ring is utilized, the minimum diameter after the compression and the tightening of the hole-used steel wire retainer ring is not larger than the diameter of the outer wall of the tooth holder of the cutting pick, the minimum diameter after the compression and the tightening of the hole-used steel wire retainer ring is larger than the outer diameter of the tooth holder of the cutting pick, the hole-used steel wire retainer ring is clamped through the tooth sleeve groove wall and the tooth groove wall, the cutting pick is prevented from moving, the cutting pick is limited, the cutting pick has certain axial movement, the impact performance requirement is met, and the problem that the cutting pick is lost is effectively avoided.

6. The cutting pick head is made of hard alloy materials, is high in strength and strong in compressive stress bearing capacity, has impact performance, can effectively cut and crush coal beds, waste rocks, rocks and the like, and improves coal mining efficiency.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the cutting pick of the present invention;

fig. 3 is a schematic structural view of the gear sleeve of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is a schematic view of a steel wire retainer ring for a hole according to the present invention;

reference numerals

1-cutting pick, 2-cutting pick head, 3-cutting pick holder, 4-cutting pick groove, 5-tooth sleeve, 6-tooth sleeve groove, 7-steel wire retainer ring for hole and 8-chamfer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of embodiments of the present application, generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the examples of this application

In the description, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are usually placed when the products of the present invention are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail with reference to fig. 1 to 5.

The embodiment is as follows:

a pick bit capable of preventing loss comprises a pick 1, a pick sleeve 5 and a hole steel wire retainer ring 7, wherein the pick 1 is embedded in the pick sleeve 5 in a clearance fit manner, under the action of external force, the cutting pick 1 can rotate in the circumferential direction, so that the cutting pick 1 is uniformly worn, the service life of the cutting pick 1 is prolonged, the cutting pick 1 comprises a cutting pick head 2 and a cutting pick holder 3, the cutting pick head 2 is made of hard alloy materials, has high strength, strong compressive stress bearing capacity and impact performance, can effectively cut and crush coal seams, waste rocks and the like, improves the coal mining efficiency, the cutting pick holder 3 is provided with a cutting pick groove 4, the inner wall of the tooth sleeve 5 is provided with a tooth sleeve groove 6, the cutting pick groove 4 and the tooth sleeve groove 6 are both annular grooves, after the cutting pick 1 is installed, a space is formed between the cutting pick groove 4 and the tooth sleeve groove 6, and a steel wire retainer ring 7 for a hole can axially move.

The front end of the gear sleeve groove 6 is provided with a chamfer 8 which forms an angle of 15 degrees with the horizontal direction, so that the cutting tooth 1 can be conveniently taken out and replaced. The hole steel wire retainer ring 7 is arranged between the cutting pick groove 4 and the tooth sleeve groove 6, the hole steel wire retainer ring 7 is an elastic opening ring, the elasticity of the hole steel wire retainer ring 7 is utilized, the cutting pick 1 is arranged in the tooth sleeve 5, the hole steel wire retainer ring 7 enters the tooth sleeve 5 to be compressed and then expanded, the minimum diameter after the compression and the contraction is not larger than the diameter of the outer wall of the cutting pick holder 3, the maximum diameter after the expansion is released is not smaller than the diameter of the inner wall of the tooth sleeve groove 6, the hole steel wire retainer ring 7 is clamped through the wall of the tooth sleeve groove 6 and the wall of the cutting pick groove 3, the cutting pick 1 is prevented from moving, the cutting pick 1 is limited, the cutting pick 1 has certain axial movement, the impact performance requirement is met, and the problem that the cutting pick 1 is lost is effectively avoided. The friction force between the original elastic sleeve and the gear sleeve 5 is changed into the friction force limiting of the hole steel wire retainer ring 7, so that the limiting reliability is improved, and meanwhile, the installation is more convenient.

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.

Claims (6)

1. The utility model provides a prevent losing pick drill bit, its characterized in that, includes pick (1), facing (5) and hole steel wire retaining ring (7), pick (1) is including pick (2) and pick holder (3), be provided with pick slot (4) on pick holder (3), the facing (5) inner wall is provided with facing slot (6), install between pick slot (4) and facing slot (6) with steel wire retaining ring (7) in the hole.

2. A loss prevention pick drill bit as claimed in claim 1, wherein the pick (1) is embedded in the sleeve (5) with a clearance fit.

3. A loss prevention pick drill according to claim 1, wherein the front end of the sleeve groove (6) is provided with a chamfer (8).

4. A loss prevention pick drill bit as claimed in claim 1, wherein the pick groove (4) and the sleeve groove (6) are both annular grooves, and a space for axial play of the wire retainer (7) for the bore is formed between the pick groove (4) and the sleeve groove (6).

5. A loss prevention pick drill according to claim 1, wherein the bore wire retainer (7) is a resilient split ring having a compressed tightened minimum diameter less than the diameter of the outer wall of the pick shank (3) and a relaxed minimum diameter greater than the outer diameter of the pick shank (3).

6. A loss prevention pick drill bit as claimed in claim 1, wherein the pick head (2) is of cemented carbide material.

Images