CN216517987U - Rotary assembly type cutting tooth - Google Patents

Abstract

The utility model belongs to the technical field of cutting teeth, and provides a rotary assembly type cutting tooth which comprises a cutting tooth head, a cutting tooth body, a cutting tooth handle and an extension handle, wherein the cutting tooth handle comprises a handle head, a handle body and a handle tail, a wear-resistant layer is arranged on the side surface of the cutting tooth body, a plurality of flow guide grooves and heat dissipation grooves are formed in the side surface of the cutting tooth body, three positioning grooves are formed in the bottom surface of the cutting tooth body, an inserting groove corresponding to the positioning grooves is formed in the top surface of the handle head, a positioning pin is arranged in the inserting groove, three locking pin blind holes are horizontally formed in the side surface of the handle head, a locking pin movably matched with the positioning pin is arranged in the locking pin blind holes, the extension handle comprises a first connecting part and a second connecting part, and the first connecting part protruding out of the cutting tooth body and the second connecting part are simultaneously in threaded connection with a stepped groove formed in the head part of the cutting tooth handle. The utility model has the advantages of reasonable design, simple structure, better anti-denudation capability, convenient assembly, higher repeatable utilization rate, contribution to reducing the construction cost and suitability for large-scale popularization.

Description

Rotary assembly type cutting tooth

Technical Field

The utility model belongs to the technical field of cutting picks, and particularly relates to a rotary assembly type cutting pick.

Background

The cutting picks are divided into cutting picks of a coal cutter and cutting picks of a heading machine, are parts on the mining heading machine, are main wearing and wearing parts of the coal cutter and the heading machine, have large consumption, and particularly when a fault or a large amount of waste rocks are clamped, the consumption can be greatly increased. The cutting pick is driven to cut in the coal seam in an impact rotation mode, high-pressure stress and shearing bending stress are required to be simultaneously borne, the impact load is periodic and alternating, the cutting pick and the coal seam are subjected to severe friction in the excavation process to generate friction heat, and various mechanical behaviors such as local yielding, contact fatigue, corrosion and fracture are possibly accompanied in the whole abrasion process. The working surface of the cutting pick is in direct contact with hard materials such as rocks, ores and the like, and is preferably made of wear-resistant materials. The cutting pick made of multiple materials can improve the comprehensive performance of the cutting pick.

Currently, a typical cutting pick comprises a cutting head, a cutting pick body and a cutting pick shank. The cutting pick body is usually connected with the cutting pick handle in a welding mode, a large number of cutting pick handles are scrapped after the cutting pick body is scrapped, the utilization rate is low, and waste is serious; secondly, the contact area of the cutting pick body with the rock stratum except the cutting pick head is also larger, but the anti-stripping capability is poorer, so that the cutting pick body is easy to generate a hollow or thin too early, and the cutting pick excavation capability is greatly reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems of the cutting pick, the utility model provides the rotary assembled cutting pick which has the advantages of reasonable design, simple structure, better anti-corrosion capability, convenient assembly, higher repeatable utilization rate and contribution to reducing the construction cost.

In order to achieve the purpose, the utility model adopts the technical scheme that the rotary assembly type cutting pick comprises a cutting pick head, a cutting pick body and a cutting pick handle which are sequentially connected, wherein the cutting pick handle comprises a handle head, a handle body and a handle tail, the centers of the cutting pick body and the cutting pick handle are provided with extension handles in threaded connection with the cutting pick body and the cutting pick handle, the side surface of the cutting pick body close to the cutting pick head is provided with a wear-resistant layer, the side surface of the cutting pick body is provided with a plurality of uniformly distributed diversion grooves, the groove top surfaces of the diversion grooves are inclined surfaces which incline outwards, heat dissipation grooves which extend towards the center of the cutting pick body are arranged on the inclined surfaces, the bottom surface of the cutting pick body is provided with three positioning grooves which are distributed around the center of the extension handle, the top surface of the handle head is provided with inserting grooves corresponding to the positioning grooves, positioning pins are arranged in the inserting grooves, and three locking pin blind holes which are communicated with the inserting grooves are horizontally arranged on the side surface of the handle head, the extension handle comprises a first connecting part and a second connecting part, the first connecting part is connected with the cutting pick body, the second connecting part is connected with the cutting pick handle, the diameter of the first connecting part is larger than that of the second connecting part, the first connecting part protrudes out of the cutting pick body, and the first connecting part protrudes out of the cutting pick body and the second connecting part are simultaneously in threaded connection with a stepped groove formed in the head of the cutting pick handle.

Preferably, the side surface of the crown is provided with an annular assembly groove, the blind lock pin hole is arranged in the assembly groove, and the lock pin is arranged in the blind lock pin hole in a countersunk head mode.

Preferably, two symmetrical heat conduction grooves are formed in the side faces of the first connecting portion and the second connecting portion, and the heat conduction grooves are in the same direction with the axis of the extension handle.

Preferably, the horizontal section of the diversion trench is trapezoidal, the bottom of the diversion trench penetrates through the bottom surface of the cutting pick body, the diameter of the crown is larger than that of the bottom of the cutting pick body, and the top surface of the crown seals the diversion trench.

Preferably, the butt-joint surface of the positioning pin and the locking pin is a wedge-shaped surface.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. according to the rotary assembled cutting pick, the wear-resistant layer is adopted, so that the surface quality of the cutting pick body can be improved, and the anti-degradation capability of the cutting pick body is improved; the cutting pick body is in threaded connection with the cutting pick handle through the extension handle, so that the assembly performance of the cutting pick can be improved, and a self-locking mechanism consisting of a positioning pin and a locking pin is arranged between the cutting pick handle and the cutting pick body, so that the connection reliability of the cutting pick body and the cutting pick handle is effectively improved; the heat dissipation performance of the cutting tooth can be improved by utilizing the flow guide grooves and the heat dissipation grooves. This use novel reasonable in design, simple structure, anti denudation ability better, be convenient for assemble, but reuse rate is higher and be favorable to reducing construction cost, is fit for extensive popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a front view of a rotary assembly pick provided by way of example;

FIG. 2 is a cross-sectional view of the rotary assembly pick in the direction C-C provided by the embodiment;

FIG. 3 is an isometric view of a rotary assembly pick provided by an embodiment;

FIG. 4 is an enlarged schematic view of the structure A in FIG. 2 according to an exemplary embodiment;

in the above figures, 1, a cutting pick head; 2. a pick body; 21. a diversion trench; 22. a heat sink; 23. Positioning a groove; 3. a pick shank; 31. a crown; 32. a handle body; 33. a shank tail; 34. a slot; 35. A blind hole of the lock pin; 36. a stepped groove; 37. assembling a groove; 4. a handle is extended; 41. a first connection portion; 42. A second connecting portion; 43. a heat conducting groove; 5. a wear layer; 6. positioning pins; 7. and (4) locking pins.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

The utility model provides a rotary assembled cutting pick, which comprises a cutting pick head 1, a cutting pick body 2 and a cutting pick handle 3 which are connected in sequence, wherein the cutting pick handle 3 comprises a handle head 31, a handle body 32 and a handle tail 33, and an extension handle 4 in threaded connection with the cutting pick body 2 and the cutting pick handle 3 is arranged at the center of the cutting pick body and the cutting pick handle 3. The cutting pick head 1 is a conventional cutting pick head, and the description of the embodiment is omitted here. On the basis, the cutting pick body 2 provided by the utility model is provided with a wear-resistant layer 5 on the side surface close to the cutting pick head 1, the side surface of the cutting pick body 2 is provided with a plurality of uniformly distributed guide grooves 21, the groove top surface of each guide groove 21 is an inclined surface inclined outwards, a heat dissipation groove 22 extending towards the center of the cutting pick body 2 is arranged on the inclined surface, the bottom surface of the cutting pick body 2 is provided with three positioning grooves 23 distributed around the center of the extension handle 4, the top surface of the handle head 31 is provided with an insertion groove 34 corresponding to the positioning groove 23, a positioning pin 6 is arranged in the insertion groove 34, the side surface of the handle head 31 is horizontally provided with three locking pin blind holes 35 communicated with the insertion groove 34, a locking pin 7 movably matched with the positioning pin 6 is arranged in the locking pin blind hole 35, the extension handle 4 comprises a first connecting part 41 connected with the cutting pick body 2 and a second connecting part 42 connected with the cutting pick handle 3, the diameter of the first connecting part 41 is larger than that of the second connecting part 42, the first connection portion 41 projects from the pick body 2, and the portion of the first connection portion 41 projecting from the pick body and the second connection portion 42 are both threadedly connected to the stepped recess 36 provided in the head of the pick shank 3. Wherein, wearing layer 5 can improve the surface quality of pick body 2, improves the anti ablation ability of pick body 2. Furthermore, this pick not only adopts extension handle 4 to carry out threaded connection with pick body 2 and pick handle 3, still carries out the design of ladder to the shape of extension handle 4 simultaneously, is favorable to improving the structural strength of extension handle 4 to guarantee that it has higher connection reliability with the pick body and pick handle 3, thereby guarantee that this pick has higher job stabilization nature. Furthermore, a self-locking mechanism consisting of the positioning pin 6 and the lock pin 7 is arranged between the cutting pick handle 3 and the cutting pick body 2, the positioning pin 6 in the slot 34 can be ejected out by inserting the lock pin 7 into the lock pin blind hole 35, the cutting pick body 2 is positioned by the positioning pin 6, the cutting pick body is prevented from loosening, and the reliability of connection between the cutting pick body 2 and the cutting pick handle 3 is effectively improved. Guide slot 21 on the pick body 2 can play the effect of chip removal on the one hand, prevents that the rock stratum piece from producing wearing and tearing many times to the pick, and on the other hand then plays radiating effect together with radiating groove 22, improves the heat dispersion of pick, is favorable to guaranteeing that this pick has higher excavation ability and radiating groove 22 can improve the heat dispersion of this pick.

In order to prolong the service life of the lock pin 7, the side surface of the crown 31 is provided with an annular assembly groove 37, a lock pin blind hole is arranged in the assembly groove 37, and the lock pin 7 is countersunk in the lock pin blind hole. In this way, the lock pin 7 is arranged on the inner side of the assembly groove 37 in a hidden design, and the assembly groove 37 is matched with a pick box of the tunneling device, so that the contact probability of the lock pin 7 and an external rock stratum is reduced, and the direct damage of the lock pin 7 to influence the self-locking performance of a self-locking mechanism formed by the lock pin 7 and the positioning pin 6 is avoided.

In order to improve the utilization rate of the cutting pick, two symmetrical heat conducting grooves 43 are arranged on the side surfaces of the first connecting part 41 and the second connecting part 42, and the heat conducting grooves 43 are in the same direction with the axis of the extension handle 4. Like this, the heat on the helicoid of extension handle 4 distributes on the inner wall of heat-conducting groove 43 and in the inside air of heat-conducting groove 43 as far as possible, and then guarantees the effective connectivity of extension handle 4 and the 3 thread fit faces of pick handle, reduces the condition that appears hot cohering moreover, convenient to detach.

Furthermore, the horizontal section of the diversion trench 21 is trapezoidal, the bottom of the diversion trench penetrates through the bottom surface of the cutting pick body 2, the diameter of the crown 31 is larger than that of the bottom of the cutting pick body 2, and the top surface of the crown 31 seals the diversion trench 21. Like this, seal guiding gutter 21 with the help of crown 31 and can greatly reduced guiding gutter 21's the production and processing degree of difficulty, be favorable to reduction in production cost, design benefit moreover, the practicality is stronger.

In order to improve the matching performance of the positioning pin 6 and the lock pin 7, the butt joint surface of the positioning pin 6 and the lock pin 7 is a wedge-shaped surface. The positioning pin 6 and the wedge-shaped surface of the lock pin 7 can be matched to form an anti-rotation effect, and the positioning pin and the lock pin can be respectively provided with higher stability in the lock pin blind hole 35 and the slot 34, so that the positioning performance of a good self-locking mechanism is exerted, and the connection reliability of the cutting pick body 2 and the cutting pick handle 3 is improved.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims (5)

1. A rotary assembled cutting pick comprises a cutting pick head, a cutting pick body and a cutting pick handle which are sequentially connected, wherein the cutting pick handle comprises a handle head, a handle body and a handle tail, and an extension handle in threaded connection with the cutting pick body and the cutting pick handle is arranged at the center of the cutting pick body and the cutting pick handle, and the rotary assembled cutting pick is characterized in that a wear-resistant layer is arranged on the side surface of the cutting pick body close to the cutting pick head, a plurality of uniformly distributed diversion trenches are arranged on the side surface of the cutting pick body, the trench top surface of each diversion trench is an inclined surface inclined outwards, a heat dissipation trench extending towards the center of the cutting pick body is arranged on the inclined surface, three positioning trenches distributed around the center of the extension handle are arranged on the bottom surface of the cutting pick body, slots corresponding to the positioning trenches are arranged on the top surface of the handle head, positioning pins are arranged in the slots, three locking pin blind holes communicated with the slots are horizontally arranged on the side surface of the handle head, and locking pins in movable fit with the positioning pins are arranged in the locking pin blind holes, the extension handle includes the first connecting portion of being connected with the pick body and the second connecting portion of being connected with the pick handle, the diameter of first connecting portion is greater than the diameter of second connecting portion, first connecting portion protrusion in the pick body, first connecting portion protrusion in the part of pick body and second connecting portion simultaneously with set up the ladder groove threaded connection at the pick handle head.

2. A rotary assembly pick as claimed in claim 1, wherein the side of the crown is provided with an annular mounting slot, the blind lock pin hole being provided in the mounting slot, and the lock pin being provided in a blind lock pin hole of countersunk form.

3. A rotary assembly cutting pick according to claim 2, wherein the first and second connection portions are each provided with two symmetrical heat conducting grooves on a side surface thereof, the heat conducting grooves being co-axial with the elongate shank.

4. A rotary assembly pick of claim 1, wherein the channel is trapezoidal in horizontal cross-section with the base extending through the bottom of the pick body, the crown having a diameter greater than the diameter of the bottom of the pick body, and the top surface of the crown sealing the channel.

5. A rotary assembly pick as claimed in claim 1, wherein the abutment surfaces of the locating pin and the locking pin are wedge surfaces.

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