CN217602653U - Cutting pick with hoop type cutting pick head connecting structure - Google Patents
Cutting pick with hoop type cutting pick head connecting structure Download PDFInfo
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- CN217602653U CN217602653U CN202221893462.7U CN202221893462U CN217602653U CN 217602653 U CN217602653 U CN 217602653U CN 202221893462 U CN202221893462 U CN 202221893462U CN 217602653 U CN217602653 U CN 217602653U
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Abstract
A cutting pick with a hoop type cutting pick head connecting structure comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the hoop type sleeve can realize the axial and radial bidirectional limiting of the cutting pick head relative to the cutting pick seat; then the pick holder is connected with the hoop type sleeve through welding or threaded connection; therefore, the cutting pick head is not required to be directly welded, and the cutting pick head can be prevented from being thermally damaged; the pick head, the pick seat and the hoop type sleeve are three independent parts before connection is established; the pick box can be selected or processed to ensure strength and toughness; the hoop type sleeve can mainly ensure the strength and the hardness during material selection or processing; after the pick head, the pick seat and the hoop-type sleeve are established and connected, all parts of the pick can reach the corresponding optimal mechanical property state; the performance of the whole cutting pick is improved.
Description
Technical Field
The utility model relates to a technical field of equipment such as coal mining, tunnelling and dig soon especially relates to a there is hoop formula pick head connection structure's pick.
Background
The cutting pick is a tool for cutting coal or rock by mining machinery, and generally comprises a cutting pick head and a cutting pick seat; the cutting pick head directly cuts coal or rock, and a hard alloy head is mostly adopted when higher hardness is required; the hard alloy head is made of tungsten-cobalt alloy mostly; the cutting pick seat is a connecting part of a cutting pick head and coal mining equipment, tunneling equipment, rotary excavating equipment and the like, and is required to have stronger impact toughness, so the cutting pick seat is made of steel with high strength and high toughness; the conventional cutting pick, such as the utility model patent with publication number CN215108758U, is a hard alloy drill bit cutting pick, the lower end of the cutting pick head is embedded into a cutting pick seat and then connected with the cutting pick seat through a brazing process; the brazing process needs to uniformly heat the pick head and the pick seat to the melting temperature of the brazing filler metal, and then heat treatment is carried out to establish connection; the existing connecting structure of the cutting pick head and the cutting pick seat has the following defects: 1. in the processes of heating the brazing filler metal and performing heat treatment, the cutting pick head is easily damaged by heat, so that the service life of the cutting pick head is greatly shortened; 2. the mechanical properties required by the connection part of the pick holder and the pick head and the mechanical properties required by the connection part of the pick holder and the coal mining equipment, the tunneling equipment, the rotary drilling equipment and the like are different; in the technical scheme, the connection part of the pick holder and the pick head can achieve mechanical properties, and the connection part of the pick holder and coal mining equipment or tunneling and rotary excavating equipment can achieve mechanical properties which are mutually restricted and are not in an optimal mechanical property state; the performance of the entire pick is limited; the conventional cutting picks having the above disadvantages are based on the fact that the connecting structure thereof must be realized by the conventional process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem and providing a cutting pick with a hoop type cutting pick head connecting structure.
The technical scheme of the utility model is that: a cutting pick with a hoop type cutting pick head connecting structure comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the upper part of the pick box is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop-type sleeve is simultaneously sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the outer wall of the hoop-type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; the outer edge of the joint of the bottom of the hoop-type sleeve and the middle of the pick box is provided with a welding groove.
Preferably, the upper part of the pick head is a cone; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is in stable transition with the outer wall of the diamond polycrystalline layer.
Preferably, the upper part of the pick box is a conical boss.
Preferably, the bottom edge of the pick box is chamfered.
A cutting pick with a hoop type cutting pick head connecting structure comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the upper part of the pick holder is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop-type sleeve is simultaneously sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the outer wall of the hoop-type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; the middle part of the pick holder is provided with a plurality of mounting screws; the mounting screws are distributed on the circumference of the shaft center of the cutting pick head; each mounting screw penetrates through the middle part of the pick box from bottom to top and is in threaded connection with the hoop type sleeve.
Preferably, the upper part of the pick head is a cone; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is stably transited with the outer wall of the diamond polycrystalline layer.
Preferably, the upper part of the pick box is a conical boss.
Preferably, the bottom edge of the pick box is chamfered.
A cutting pick with a hoop type cutting pick head connecting structure comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the upper part of the pick holder is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop-type sleeve is simultaneously sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the outer wall of the hoop-type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; more than one mounting screw is arranged in the middle of the pick box; the mounting screw penetrates through the middle part of the pick holder from bottom to top and is in threaded connection with the hoop-type sleeve; the upper part of the pick seat is a cylindrical boss which is coaxially arranged; the inner end of the upper part of the pick box is provided with an external thread which exceeds the side surface of the outer end of the upper part of the pick box; the lower end of the inner wall of the hoop-type sleeve is provided with an internal thread in threaded connection with the external thread.
Preferably, the upper part of the pick head is a cone; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is in stable transition with the outer wall of the diamond polycrystalline layer.
Preferably, the bottom edge of the pick box is chamfered.
The utility model has the advantages that: the cutting pick with the hoop type cutting pick head connecting structure of the utility model has the advantages that,
(1) The pick head is indirectly connected with the pick seat through the hoop-type sleeve; even if the connection is established through brazing and then heat treatment is carried out, the connection can not directly act on the cutting pick head, so that the heat damage of the cutting pick head is reduced, and the service life of the cutting pick head is ensured;
(2) The hoop type sleeve, the pick holder and the pick head are three independent parts before connection is established; the hoop type sleeve and the pick holder can be subjected to material selection or heat treatment respectively according to needs, and then the connection relation of the hoop type sleeve, the pick holder and the pick head is established; each part of the cutting pick can have corresponding mechanical property, and the overall performance is improved;
(3) The hoop-type sleeve and the pick holder can be connected through mounting screws distributed circumferentially; the cutting pick head is limited by the hoop-type sleeve and the cutting pick seat; therefore, the cutting pick head can be prevented from being thermally damaged, the service life of the cutting pick head is ensured, and the cutting pick head can be dismounted again; the parts of the cutting teeth which are most easily worn and replaced, namely the hoop-type sleeve and the cutting tooth head, can be directly replaced after being worn seriously, so that the use cost of the cutting teeth is reduced;
(4) The hoop type sleeve body and the pick box body can be connected through threads; the pick holder is also connected with the hoop type sleeve through a mounting screw; the hoop type sleeve body and the pick box body are in threaded connection to realize axial limiting between the hoop type sleeve and the pick box; the mounting screw realizes the axial line limit between the hoop type sleeve body and the pick box body and also realizes the radial limit; therefore, the connection relation of the cutting teeth is more stable; the pick head suffers less thermal damage.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a schematic structural view of the third embodiment;
FIG. 3 is a perspective view of the third embodiment;
FIG. 4 is a schematic structural view of the fifth embodiment;
FIG. 5 is an enlarged view I of FIG. 4;
in the figure: 1. the diamond wheel bit comprises a pick head, 11 diamond polycrystalline layer, 2 pick seat, 21 pick seat upper part, 214 external thread, 22 pick seat middle part, 221 lower counter bore, 23 pick seat lower part, 231 mounting groove, 3 hoop type sleeve, 31 internal thread, 4 welding groove and 5 inner hexagon screw.
Detailed Description
The first embodiment is as follows: referring to fig. 1, a cutting pick with a hoop type cutting pick head connecting structure comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the cutting pick head is axially limited by the cutting pick seat; the upper part of the pick holder is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop-type sleeve is simultaneously sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the hoop type sleeve is used for radially limiting the cutting pick head so that the cutting pick head and the cutting pick seat keep a certain radial position relation; so that the position of the pick head relative to the pick seat is determined; the outer edge of the joint of the bottom of the hoop-type sleeve and the middle of the pick box is provided with a welding groove; in the embodiment, the connection relation between the pick head and the pick seat is established in a manner of welding between the bottom of the hoop type sleeve and the pick seat; therefore, the cutting pick head does not need to be directly welded, and the heat loss of the cutting pick head caused by welding is avoided; in addition, before welding, the pick holder, the pick head and the hoop-type sleeve of the embodiment are three independent parts, and can be respectively subjected to material selection or proper heat treatment according to requirements; therefore, the mechanical properties required by the cutting pick seat and the hoop type sleeve of the cutting pick can be optimal, and the integral performance of the cutting pick can be improved; the outer wall of the hoop type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; so that rock or coal cut by the cutting pick head can flow steadily along the outer wall of the ferrule.
The upper part of the cutting pick head is a cone; the cutting pick head is made of hard alloy; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is stably transited with the outer wall of the diamond polycrystalline layer; the structure is more affected by thermal damage; because the thermal expansion coefficients of the diamond polycrystalline layer and the hard alloy are different, the diamond polycrystalline layer and the hard alloy are easy to expand respectively after being heated, and the connection relation between the diamond polycrystalline layer and the hard alloy is damaged.
The lower part of the pick holder is provided with an installation handle coaxial with the pick head; the lower end of the mounting handle is provided with a mounting groove for mounting; therefore, the device is convenient to be installed on equipment for coal mining, tunneling, rotary digging and the like.
The upper part of the pick holder is a conical boss; the upper part of the pick holder is matched with the lower part of the inner wall of the hoop type sleeve, so that the pick holder can be automatically centered, and the coaxiality of the pick holder and a pick head is ensured.
The edge of the bottom of the pick box is inverted with a chamfer, so that the pick box can be conveniently connected with coal mining equipment, tunneling equipment, rotary excavating equipment and the like.
Example two: the second embodiment is basically the same as the first embodiment, and the same parts are not repeated, but the difference is that a chamfer is inverted on the edge of the bottom of the pick box, so that the connection relationship between the pick box and the coal mining equipment, the tunneling equipment, the rotary drilling equipment and the like can be conveniently established.
Example three: referring to fig. 2-3, a cutting pick with a hoop type cutting pick head connecting structure comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the cutting pick head is axially limited by the cutting pick seat; the upper part of the pick holder is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop-type sleeve is simultaneously sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the hoop type sleeve carries out radial limiting on the cutting pick head so that the cutting pick head and the cutting pick seat keep a certain radial position relation; so that the position of the pick head relative to the pick seat is determined; the middle part of the pick holder is provided with a plurality of mounting screws; the mounting screws are distributed on the circumference of the shaft center of the cutting pick head; each mounting screw penetrates through the middle part of the pick box from bottom to top and is in threaded connection with the hoop-type sleeve; in the embodiment, the connection relation between the pick head and the pick seat is established in a way that a mounting screw penetrates through the middle part of the pick seat and is in threaded connection with a hoop-type sleeve; therefore, the cutting pick head does not need to be welded, and the heat loss of the cutting pick head caused by welding is avoided; in addition, the pick holder, the pick head and the hoop-type sleeve of the embodiment are three independent parts, and can be respectively subjected to material selection or proper heat treatment according to requirements; therefore, the mechanical properties required by the cutting seat and the hoop type sleeve of the cutting pick can be optimal, and the overall performance of the cutting pick is improved; the outer wall of the hoop-type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; so that rock or coal cut by the cutting pick head can flow steadily along the outer wall of the ferrule.
The upper part of the cutting pick head is a cone; the cutting pick head is made of hard alloy; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is in stable transition with the outer wall of the diamond polycrystalline layer; the structure is more affected by thermal damage; because the thermal expansion coefficients of the diamond polycrystalline layer and the hard alloy are different, the diamond polycrystalline layer and the hard alloy are easy to expand respectively after being heated, and the connection relation between the diamond polycrystalline layer and the hard alloy is damaged.
The lower part of the pick holder is provided with an installation handle coaxial with the pick head; the lower end of the mounting handle is provided with a mounting groove for mounting; therefore, the device is convenient to be installed on equipment for coal mining, tunneling, rotary digging and the like.
The upper part of the pick holder is a conical boss; the upper part of the pick holder is matched with the lower part of the inner wall of the hoop type sleeve, so that the pick holder can be automatically centered, and the coaxiality of the pick holder and a pick head is ensured.
The mounting screw is a socket head cap screw; the middle part of the pick box is provided with a lower counter bore corresponding to the mounting screw; thus, the mounting screw can be embedded into the sunken hole, and the head is prevented from leaking to cause interference on cutting of the cutting pick.
The edge of the bottom of the pick box is inverted with a chamfer, so that the pick box can be conveniently connected with coal mining equipment, tunneling equipment, rotary excavating equipment and the like.
Example four: the fourth embodiment is basically the same as the third embodiment, and the same points are not repeated, but the difference is that a chamfer is inverted on the edge of the bottom of the pick box, so that the connection relationship between the pick box and the coal mining equipment, the tunneling equipment, the rotary drilling equipment and the like can be conveniently established.
Example five: referring to fig. 4-5, a cutting pick with a hoop type cutting pick head connecting structure comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the cutting pick head is axially limited by the cutting pick seat; the upper part of the pick holder is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop type sleeve is sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the hoop type sleeve carries out radial limiting on the cutting pick head so that the cutting pick head and the cutting pick seat keep a certain radial position relation; so that the position of the pick head relative to the pick box is determined; more than one mounting screw is arranged in the middle of the pick holder; the mounting screw penetrates through the middle part of the pick holder from bottom to top and is in threaded connection with the hoop-type sleeve; the upper part of the pick holder is a cylindrical boss which is coaxially arranged; the inner end of the upper part of the pick box is provided with an external thread which exceeds the side surface of the outer end of the upper part of the pick box; the lower end of the inner wall of the hoop type sleeve is provided with an internal thread in threaded connection with the external thread; in the embodiment, the connection relation between the pick head and the pick seat is established in a mode that a mounting screw penetrates through the middle part of the pick seat and is in threaded connection with the hoop-type sleeve and the lower end of the inner wall of the hoop-type sleeve is in threaded connection with the pick seat; therefore, the cutting pick head does not need to be welded, and the heat loss of the cutting pick head caused by welding is avoided; in addition, the pick holder, the pick head and the hoop-type sleeve of the embodiment are three independent parts, and can be respectively subjected to material selection or proper heat treatment according to requirements; therefore, the mechanical properties required by the cutting seat and the hoop type sleeve of the cutting pick can be optimal, and the overall performance of the cutting pick is improved; the outer wall of the hoop type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; so that rock or coal cut by the cutting pick head can flow steadily along the outer wall of the ferrule.
The upper part of the cutting pick head is a cone; the cutting pick head is made of hard alloy; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is in stable transition with the outer wall of the diamond polycrystalline layer; the structure is more affected by thermal damage; because the thermal expansion coefficients of the diamond polycrystalline layer and the hard alloy are different, the diamond polycrystalline layer and the hard alloy are easy to expand respectively after being heated, and the connection relation between the diamond polycrystalline layer and the hard alloy is damaged.
The lower part of the pick holder is provided with an installation handle coaxial with the pick head; the lower end of the mounting handle is provided with a mounting groove for mounting; therefore, the device is convenient to be installed on equipment for coal mining, tunneling, rotary digging and the like.
The mounting screw is a socket head cap screw; the middle part of the pick box is provided with a lower counter bore corresponding to the mounting screw; thus, the mounting screw can be embedded into the sunken hole, and the head is prevented from leaking to cause interference on cutting of the cutting pick; after the threaded connection between the lower end of the inner wall of the hoop type sleeve and the pick box is determined, the position of the mounting hole is determined according to the threaded connection position between the hoop type sleeve and the mounting screw.
The edge of the bottom of the pick box is inverted with a chamfer, so that the pick box can be conveniently connected with coal mining equipment, tunneling equipment, rotary excavating equipment and the like.
Example six: the sixth embodiment is basically the same as the fifth embodiment, and the same parts are not described in detail, but the difference is that a chamfer is inverted on the edge of the bottom of the pick box, so that the connection relationship between the pick box and the coal mining equipment, the tunneling equipment, the rotary drilling equipment and the like can be conveniently established.
Claims (8)
1. A cutting pick with a hoop type cutting pick head connecting structure is characterized by comprising a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the upper part of the pick holder is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop-type sleeve is simultaneously sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the outer wall of the hoop-type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; the outer edge of the joint of the bottom of the hoop-type sleeve and the middle of the pick box is provided with a welding groove.
2. A cutting pick of a banded pick head connection structure according to claim 1, wherein: the upper part of the cutting pick head is a cone; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is stably transited with the outer wall of the diamond polycrystalline layer.
3. A cutting pick of a banded pick head connection according to claim 1 or 2, wherein: the upper part of the pick box is a conical boss.
4. The utility model provides a there is hoop formula pick head connection structure's pick which characterized in that: comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the upper part of the pick holder is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop-type sleeve is simultaneously sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the outer wall of the hoop-type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; the middle part of the pick holder is provided with a plurality of mounting screws; the mounting screws are distributed on the circumference of the shaft center of the cutting pick head; each mounting screw penetrates through the middle part of the pick box from bottom to top and is in threaded connection with the hoop type sleeve.
5. A cutting pick of the banded pick head connection structure of claim 4, wherein: the upper part of the cutting pick head is a cone; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is in stable transition with the outer wall of the diamond polycrystalline layer.
6. A cutting pick of a banded pick head connection according to claim 4 or 5, wherein: the upper part of the pick holder is a conical boss.
7. The utility model provides a there is hoop formula pick head connection structure's pick which characterized in that: comprises a cutting pick head, a cutting pick seat and a hoop type sleeve; the bottom surface of the cutting pick head is connected with the top surface of the cutting pick seat; the upper part of the pick holder is provided with a convex step boss; the lower part of the pick head is a conical boss with a small upper part and a big lower part; the inner wall of the hoop type sleeve is sleeved on the outer walls of the upper part of the pick holder and the lower part of the pick head in a matching way; the outer wall of the hoop-type sleeve is a curved surface with two ends respectively tangent with the outer surface of the upper part of the cutting pick head and the outer surface of the middle part of the cutting pick; more than one mounting screw is arranged in the middle of the pick holder; the mounting screw penetrates through the middle part of the pick holder from bottom to top and is in threaded connection with the hoop-type sleeve; the upper part of the pick seat is a cylindrical boss which is coaxially arranged; the inner end of the upper part of the pick box is provided with an external thread which exceeds the side surface of the outer end of the upper part of the pick box; the lower end of the inner wall of the hoop-type sleeve is provided with an internal thread in threaded connection with the external thread.
8. A cutting pick of the banded pick head connection structure of claim 7, wherein: the upper part of the cutting pick head is a cone; the upper surface of the pick head is covered with a diamond polycrystalline layer; the upper part of the outer wall of the hoop type sleeve is stably transited with the outer wall of the diamond polycrystalline layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221893462.7U CN217602653U (en) | 2022-07-21 | 2022-07-21 | Cutting pick with hoop type cutting pick head connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221893462.7U CN217602653U (en) | 2022-07-21 | 2022-07-21 | Cutting pick with hoop type cutting pick head connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217602653U true CN217602653U (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221893462.7U Active CN217602653U (en) | 2022-07-21 | 2022-07-21 | Cutting pick with hoop type cutting pick head connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217602653U (en) |
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2022
- 2022-07-21 CN CN202221893462.7U patent/CN217602653U/en active Active
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