CN210369101U - Drill rod of breaking hammer - Google Patents
Drill rod of breaking hammer Download PDFInfo
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- CN210369101U CN210369101U CN201920238723.3U CN201920238723U CN210369101U CN 210369101 U CN210369101 U CN 210369101U CN 201920238723 U CN201920238723 U CN 201920238723U CN 210369101 U CN210369101 U CN 210369101U
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- drill rod
- jack
- rod sleeve
- sleeve
- head
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Abstract
The utility model discloses a breaking hammer drill rod, which comprises a drill rod sleeve and a drill rod head; the drill rod head comprises a connecting part and an operation part which are integrally formed, the connecting part is sleeved inside the drill rod sleeve, and the outer side surface of the operation part is provided with an alloy wear-resistant layer. The utility model provides a quartering hammer drill rod, through the impact toughness who promotes the drill rod, the rethread sets up the whole surface hardness of alloy wearing layer promotion drill rod head on the operation face surface of drill rod head for the drill rod head when strikeing repeatedly with the material, reduces the surface wear rate, is difficult for splitting when the drill rod head receives impact load simultaneously, and then increases the life and the stability of drill rod head.
Description
Technical Field
The utility model relates to a construction equipment technical field especially relates to quartering hammer drill rod.
Background
The hydraulic breaking hammer, also called hydraulic breaker or hydraulic stone breaker, uses hydrostatic pressure as power to drive piston to make reciprocating motion, and when the piston is stroked, it can make high-speed impact on drill rod, and the drill rod can break ore and concrete, etc. Therefore, the drill rod is an important part of the crusher and belongs to a wearing part. When the head of the drill rod contacts the surface of the material firstly, the head of the drill rod is impacted and abraded more strongly due to higher speed, so that the head of the drill rod needs to meet certain requirements on impact toughness and surface hardness. The impact toughness of the metal material is reduced when the hardness is increased to more than 40HRC, so that the main problem in the prior art is how to improve the wear-resistant strength of the drill rod head as much as possible under the condition of ensuring the impact toughness of the drill rod head.
SUMMERY OF THE UTILITY MODEL
For solving prior art, the technical problem that impact toughness and abrasion strength of quartering hammer drill rod can't be improved simultaneously, the technical scheme of the utility model as follows:
the breaking hammer drill rod of the utility model comprises a drill rod sleeve and a drill rod head; the drill rod head comprises a connecting part and an operation part which are integrally formed, the connecting part is sleeved inside the drill rod sleeve, and the outer side surface of the operation part is provided with an alloy wear-resistant layer.
Furthermore, the shape of the operation part is a cone structure, and the included angle between the generatrix of the cone structure and the axis is 10-45 degrees.
Further, the outer side surface of the operation part comprises a first cladding area and a second cladding area, the width of the first cladding area is 10mm-100mm, and the width of the second cladding area is 50mm-500 mm.
Further, the thickness of the alloy wear-resistant layer in the first cladding area is 1mm-100mm, and the thickness of the alloy wear-resistant layer in the second cladding area is 1mm-50 mm.
Further, the connecting part is in a circular truncated cone structure, an inner cavity of the drill rod sleeve is matched with the circular truncated cone structure, and an included angle between a bus of the circular truncated cone structure and an axis is 0.5-3 degrees.
Furthermore, a first jack is formed in the middle of the connecting portion, a second jack is formed in the middle of the drill rod sleeve, the first jack is matched with the second jack in the forming position, when the connecting portion is completely sleeved inside the drill rod sleeve, the first jack and the second jack are coaxially arranged, and the connecting portion and the drill rod sleeve are fixed through the pins penetrating through the first jack and the second jack.
Further, the inner cavity of the drill rod sleeve extends inwards, so that the depth of the inner cavity is 2mm-50mm greater than the length of the connecting part; and a through groove is formed in the extension section of the inner cavity.
Furthermore, a chamfer is arranged at the edge of the insertion end of the connecting part.
Further, the connecting part is connected with the drill rod sleeve through threads.
Furthermore, a limiting groove is formed in the edge of the joint of the drill rod sleeve and the operation part, a threaded counter bore is formed in the outer side of the tail end of the operation part, after the connecting part is in threaded connection with the drill rod sleeve, the limiting groove and a large hole of the threaded counter bore form a complete cylindrical cavity, and then a bolt is installed to enable the head of the bolt to be clamped and fixed in the cylindrical cavity, so that the drill rod sleeve and the drill rod head are prevented from rotating relatively.
The utility model provides a quartering hammer drill rod, compared with the prior art, its beneficial effect is:
the utility model provides a quartering hammer drill rod, through the impact toughness who promotes the drill rod, the rethread sets up the whole surface hardness of alloy wearing layer promotion drill rod head on the operation face surface of drill rod head for the drill rod head when strikeing repeatedly with the material, reduces the surface wear rate, is difficult for splitting when the drill rod head receives impact load simultaneously, and then increases the life and the stability of drill rod head.
Drawings
FIG. 1 is a schematic view of a drill rod bushing according to the present invention;
FIG. 2 is a schematic view of a drill rod head according to the present invention;
FIG. 3 is a schematic view of a bit head according to an embodiment;
FIG. 4 is a schematic view of a demolition hammer shank according to the present invention;
fig. 5 is a schematic view of a demolition hammer shank according to another embodiment.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-4, the breaking hammer drill rod of the present invention comprises a drill rod sleeve 1 and a drill rod head 2; the drill rod head 2 comprises a connecting part 21 and an operation part 22 which are integrally formed, the drill rod sleeve 1 is hollow, the connecting part 21 of the drill rod head 2 is sleeved in the drill rod sleeve 1, the outer side surface of the operation part 22 is coated or clad with an alloy wear-resistant layer, the wear-resistant alloy layer is made of steel with alloy elements, and the alloy elements are one or more of silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper and boron, so that the surface of the operation part 22 of the drill rod head 2 has stronger hardness, and the surface wear rate is reduced when the drill rod head repeatedly collides with materials.
The working portion 22 is in the shape of a cone structure, and the generatrix of the cone structure forms an angle of 10-45 degrees, preferably 20 degrees with the axis.
The tip of the working part 22 of the drill rod head 2 is a severely worn area, in order to improve the overall service life of the drill rod head 2 and avoid early damage of local positions, the outer side surface of the working part 22 is divided into a first cladding area 221 and a second cladding area 222, the first cladding area 221 is located at the tip and has a width of 10mm-100mm, and the second cladding area 222 is located at the tail end and has a width of 50mm-500 mm. The thickness of the alloy wear-resistant layer in the first cladding region 221 is 1mm-100mm, and the thickness of the alloy wear-resistant layer in the second cladding region 222 is 1mm-50 mm.
The yield strength of the base material of the drill rod head 2 is more than or equal to 345 MPa. The Rockwell hardness range of the alloy wear-resistant layer is 40HRC-70 HRC.
The connecting part 21 of the drill rod head 2 is in a circular truncated cone structure, the inner cavity of the drill rod sleeve 1 is matched with the circular truncated cone structure, the included angle between the bus of the circular truncated cone structure and the axis is 0.5-3 degrees, the preferred included angle is 1 degree, and the structure has two advantages: one is to facilitate the insertion of the connecting portion 21 into the internal cavity of the drill rod sleeve 1; secondly, when the drill rod head 2 works, the generated impact acting force is transmitted to the side surface of the inner cavity of the drill rod sleeve 1 from the side surface of the connecting part 21, so that the impact acting force is dispersed, and the acting force is prevented from being excessively concentrated on the end surface of the connecting part 21.
In an embodiment, a first insertion hole 211 is formed in the middle of the connecting portion 21 of the drill rod head 2, a second insertion hole 11 is formed in the middle of the side surface of the drill rod sleeve 1, the first insertion hole 211 is matched with the second insertion hole 11 in the opening position, when the connecting portion 21 is completely sleeved inside the drill rod sleeve 1, the first insertion hole 211 and the second insertion hole 11 are coaxially arranged, a pin (not shown in the figure) penetrates through the first insertion hole 211 and the second insertion hole 11 to fix the connecting portion 21 and the drill rod sleeve 1, preferably, the second insertion hole 11 is a counter bore, and the pin head is hidden into the counter bore.
To facilitate replacement of the shank tip 2, the internal cavity of the shank sleeve 1 extends inwardly to a depth of 2mm to 50mm, preferably 5mm, greater than the length of the connecting portion 21; a through groove 12 is formed outside the extension section of the internal cavity, and the end of the connecting part 21 and the extension section cavity can leak from the through groove 12. The replacement process is as follows: first, the pin is removed, the pry bar is inserted into the through slot 12, and the pry bar is pressed against the connecting portion 21 to disengage the connecting portion 21 from the internal cavity.
In order to facilitate the assembly of the drill rod head 2 and the drill rod sleeve 1, the edge of the insertion end of the connecting portion 21 of the drill rod head 2 is provided with a chamfer 212.
In another embodiment, as shown in FIG. 5, the connecting portion 21 is threadedly connected to the drill rod sleeve 1, the connecting portion 21 having an external thread, and the hollow interior of the drill rod sleeve 1 having an internal thread.
In order to prevent the drill rod sleeve 1 and the drill rod head 2 from rotating relatively and further cause the drill rod head 2 to fall off, further, a limit groove 13 is arranged at the edge of the joint of the drill rod sleeve 1 and the operation part 22, the limit groove 13 is in a semi-cylindrical shape, a thread counter bore 223 is arranged on the outer side of the tail end of the operation part 22, a large hole of the thread counter bore 223 is also in a semi-cylindrical shape, after the connecting part 21 is in threaded connection with the drill rod sleeve 1, the limit groove 13 and the large hole of the thread counter bore 223 form a complete cylindrical cavity, then the head of the bolt 224 is clamped in the cylindrical cavity by installing the bolt 224, and the drill rod sleeve 1 and the drill rod head 2.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The breaking hammer drill rod is characterized by comprising a drill rod sleeve and a drill rod head; the drill rod head comprises a connecting part and an operation part which are integrally formed, the connecting part is sleeved inside the drill rod sleeve, and the outer side surface of the operation part is provided with an alloy wear-resistant layer;
the connecting part is in a circular truncated cone structure, an inner cavity of the drill rod sleeve is matched with the circular truncated cone structure, and an included angle between a bus of the circular truncated cone structure and an axis is 0.5-3 degrees;
the drill rod sleeve is characterized in that a first jack is formed in the middle of the connecting portion, a second jack is formed in the middle of the drill rod sleeve, the first jack is matched with the second jack in the forming position, when the connecting portion is completely sleeved inside the drill rod sleeve, the first jack and the second jack are coaxially arranged, and the connecting portion and the drill rod sleeve are fixed through the first jack and the second jack by pins penetrating through the first jack and the second jack.
2. A breaking hammer drill rod according to claim 1, characterized in that the working part is shaped as a cone structure, the generatrix of which forms an angle of 10-45 ° with the axis.
3. The demolition hammer drill rod according to claim 2, wherein the outer side of the working portion includes a first cladding region and a second cladding region, the first cladding region having a width of 10mm to 100mm, the second cladding region having a width of 50mm to 500 mm.
4. The demolition hammer drill rod according to claim 3, wherein the thickness of the wear resistant alloy layer in the first cladding region is 1mm to 100mm, and the thickness of the wear resistant alloy layer in the second cladding region is 1mm to 50 mm.
5. The demolition hammer shank according to claim 1, wherein the inner cavity of the shank sleeve extends inwardly such that the depth of the inner cavity is 2mm to 50mm greater than the length of the joint; and a through groove is formed in the extension section of the inner cavity.
6. The demolition hammer drill rod according to claim 5, wherein the insertion end edge of the connecting portion is chamfered.
7. A demolition hammer drill rod according to any one of claims 1-4, characterized in that the connection part is screwed to the drill rod sleeve.
8. The breaking hammer drill rod according to claim 7, wherein a limiting groove is formed in the edge of the joint of the drill rod sleeve and the working part, a threaded counter bore is formed in the outer side of the tail end of the working part, after the connecting part is in threaded connection with the drill rod sleeve, the limiting groove and a large hole of the threaded counter bore form a complete cylindrical cavity, and then a bolt is installed to enable the bolt head to be clamped in the cylindrical cavity, so that the drill rod sleeve and the drill rod head are prevented from rotating relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238723.3U CN210369101U (en) | 2019-02-25 | 2019-02-25 | Drill rod of breaking hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238723.3U CN210369101U (en) | 2019-02-25 | 2019-02-25 | Drill rod of breaking hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210369101U true CN210369101U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920238723.3U Active CN210369101U (en) | 2019-02-25 | 2019-02-25 | Drill rod of breaking hammer |
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| Country | Link |
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| CN (1) | CN210369101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963529A (en) * | 2021-02-04 | 2021-06-15 | 山东锐凯工程机械有限公司 | Wear-resistant breaking hammer piston and machining equipment thereof |
-
2019
- 2019-02-25 CN CN201920238723.3U patent/CN210369101U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963529A (en) * | 2021-02-04 | 2021-06-15 | 山东锐凯工程机械有限公司 | Wear-resistant breaking hammer piston and machining equipment thereof |
| CN112963529B (en) * | 2021-02-04 | 2023-03-10 | 山东锐凯工程机械有限公司 | Wear-resistant breaking hammer piston and machining equipment thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Hammer drill rod Effective date of registration: 20210326 Granted publication date: 20200421 Pledgee: Agricultural Bank of China Limited by Share Ltd. Chengdu Wenjiang branch Pledgor: CHENGDU ZHIXIN REFRACTORIES TECHNOLOGY Co.,Ltd. Registration number: Y2021980002142 |