CN211874397U - Thrust structure for roller bit - Google Patents
Thrust structure for roller bit Download PDFInfo
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- CN211874397U CN211874397U CN201922417671.9U CN201922417671U CN211874397U CN 211874397 U CN211874397 U CN 211874397U CN 201922417671 U CN201922417671 U CN 201922417671U CN 211874397 U CN211874397 U CN 211874397U
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- cone
- thrust
- leg
- bit
- roller
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Abstract
The utility model provides a thrust structure for roller bit, roller bit includes gear wheel and bit leg, the bit leg has the installation department, and this installation department is the step shaft form, seted up a central air vent along its axial on the installation department, seted up the mounting hole corresponding with the installation department on the gear wheel, roller bit's mounting hole is located on the installation department of bit leg through the bearing housing, thrust structure includes roller thrust block and bit leg thrust block, the utility model discloses under the prerequisite of guaranteeing thrust surface's bearing capacity, set up the oil storage tank in one of roller thrust surface and bit leg thrust surface, this oil storage tank is linked together with the central air vent of bit leg, forms lubricating grease and air passage, lubricates and cools off thrust surface, can reduce thrust block's wearing and tearing to improve bearing life; meanwhile, a gap is arranged between the bit leg mounting part and the inner wall of the cone mounting hole, the gap can be used as a chip containing space, a non-contact distance is formed between the bit leg and the cone, and the cooling effect is improved.
Description
Technical Field
The utility model belongs to roller bit field, concretely relates to thrust structure for roller bit.
Background
The roller bit consists of two parts, namely a bit leg and a roller, wherein the tail end of the bit leg is provided with a bearing for the roller to be rotatably assembled.
For a roller bit, in order to improve the drilling efficiency, on the premise of a certain rotating speed, the bit pressure and the mechanical drilling speed are basically in a linear relationship, the axial bearing capacity is inevitably improved by increasing the bit pressure, the axial bearing space is limited, and the thrust structure is required to be started for improving the bearing capacity. The existing commonly used thrust structure adopts the thrust cooperation of a hard alloy thrust block and a high-speed steel thrust block, when the roller cone runs at a high speed, the abrasion between the thrust blocks is large, the heat dissipation is difficult due to high temperature, and certain debris can be generated at the same time.
Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.
Disclosure of Invention
The utility model aims at providing a thrust structure for roller bit.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a thrust structure for a roller cone drill bit, the roller cone drill bit comprising a cone and a bit leg, the bit leg having a mounting portion, the mounting part is in a stepped shaft shape, a central vent hole is arranged on the mounting part along the axial direction of the mounting part, a mounting hole corresponding to the mounting part is arranged on the cone, the mounting hole of the roller bit is sleeved on the mounting part of the cone leg through a bearing, the thrust structure comprises a roller thrust block and a cone leg thrust block, the roller thrust block and the cone leg thrust block are oppositely arranged in the axial direction of the roller, the cone thrust block and the mounting hole are in contact fit, the cone thrust block is in interference fit with the inner wall of the top of the mounting hole, the cone leg thrust block is in interference fit with the mounting part, the cone thrust block protrudes out of the top hole wall of the mounting hole or the cone leg thrust block protrudes out of the mounting part, so that a gap is formed between the top inner wall of the mounting hole and the mounting part;
one surface of the cone thrust block, which is in contact with the cone leg thrust block, is a cone leg thrust surface, one surface of the cone leg thrust block, which is in contact with the cone leg thrust block, is a cone leg thrust surface, and one of the cone thrust surface and the cone leg thrust surface is provided with an oil storage tank;
the bit leg thrust block is provided with a center hole, one end of the center hole is communicated with the center vent hole, and the other end of the center hole penetrates through the bit leg thrust surface and is communicated with the oil storage tank.
In the above scheme, the oil storage tank is a straight tank or a V-shaped tank.
In the scheme, the gap is 0.5-1.5 mm.
In the above scheme, the outer contours of the cone thrust block and the bit leg thrust block are both polygonal.
In the scheme, the cone thrust block and the cone leg thrust block are both hard alloy thrust blocks.
The utility model discloses has following effect: the utility model discloses under the prerequisite of guaranteeing thrust surface's bearing capacity, set up the oil storage tank in one of cone thrust surface and bit leg thrust surface, this oil storage tank is linked together with the central air vent of bit leg, forms lubricating grease and air passage, lubricates and cools off thrust surface, can reduce the wearing and tearing of thrust piece, and improve the bearing life-span; meanwhile, a gap is arranged between the bit leg mounting part and the inner wall of the cone mounting hole, the gap can be used as a chip containing space, a non-contact distance is formed between the bit leg and the cone, and the cooling effect is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a cross-sectional view of an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a cone according to an embodiment of the present invention;
FIG. 4 is a schematic view of a cone thrust block according to an embodiment of the present invention;
FIG. 5 is a right side cross-sectional view of FIG. 4;
FIG. 6 is a schematic view of a structure of a bit leg stop block according to an embodiment of the present invention;
fig. 7 is a sectional view of the mounting portion according to the embodiment of the present invention.
In the above drawings: 1-roller bit, 2-roller, 21-mounting hole, 3-leg, 31-mounting part, 311-central vent hole, 4-roller thrust block, 41-roller thrust surface, 5-leg thrust block, 51-leg thrust surface, 52-central hole, 6-gap and 7-oil storage tank.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
example (b): referring to FIGS. 1-7: a thrust structure for a roller bit, the roller bit 1 comprises a roller cone 2 and a bit leg 3, the bit leg 3 is provided with an installation part 31, the installation part 31 is in a stepped shaft shape, the installation part 31 is provided with a central vent hole 311 along the axial direction, the installation part 31 and the central vent hole 311 are of the existing structure, the central vent hole 311 is used for ventilation and heat dissipation, the roller cone 2 is provided with an installation hole 21 corresponding to the installation part 31, the installation hole 21 of the roller bit 1 is sleeved on the installation part 31 of the bit leg 3 through a bearing, the thrust structure comprises a roller cone thrust block 4 and a bit leg thrust block 5, the roller cone thrust block 4 and the bit leg thrust block 5 are oppositely arranged in the axial direction of the roller cone 2 and are in contact fit with each other, the roller cone thrust block 4 is in interference fit with the inner wall at the top of the installation hole 21, specifically, a hole can be formed on the inner wall at, the cone thrust block 4 is in interference fit with the hole, the bit leg thrust block 5 is in interference fit with the mounting part 31, specifically, a hole can be formed in the mounting part 31, the bit leg thrust block 5 is in interference fit with the hole, the cone thrust block 4 protrudes out of the top hole wall of the mounting hole 21 or the bit leg thrust block 5 protrudes out of the mounting part 31, so that a gap 6 is formed between the top inner wall of the mounting hole 21 and the mounting part 31;
one surface of the cone thrust block 4, which is in contact with the cone leg thrust block 5, is a cone leg thrust surface 41, one surface of the cone leg thrust block 5, which is in contact with the cone leg thrust block 4, is a cone leg thrust surface 51, one of the cone leg thrust surface 41 and the cone leg thrust surface 51 is provided with an oil storage tank 7, in this embodiment, the oil storage tank 7 is arranged on the cone thrust surface 41, and in fact, the oil storage tank 7 is simultaneously arranged on the cone leg thrust surface 41 and the cone leg thrust surface 51, and the same effect is also achieved;
a central hole 52 is formed in the bit leg thrust block 5, one end of the central hole 52 is communicated with the central vent hole 311, and the other end of the central hole 52 penetrates through the bit leg thrust surface 51 and is communicated with the oil storage tank 7;
in a working state, lubricating grease is stored in the oil storage groove 7, the lubricating grease is in contact with the cone thrust surface 41 and the cone leg thrust surface 51, the oil storage groove 7 is communicated with the central vent hole 311 through the central hole 52 to form a lubricating grease and air channel which can lubricate and cool the thrust surface, a gap 6 is arranged between the mounting part 31 of the cone leg 3 and the inner wall of the top of the mounting hole 21 of the cone 2, the gap 6 can be used as a chip containing space, and a non-contact distance is formed between the cone leg 3 and the cone 2, so that the cooling effect is improved;
the oil storage tank 7 is a straight tank or a V-shaped tank, and preferably, the oil storage tank 7 is a V-shaped tank which can store more lubricating grease.
The gap 6 is 0.5-1.5 mm.
The outer contours of the cone thrust block 4 and the cone leg thrust block 5 are both polygonal, and preferably, the outer contours of the cone thrust block 4 and the cone leg thrust block 5 are octagonal, so that the octagonal structure is favorable for interference fit.
The cone thrust block 4 and the cone leg thrust block 5 are both hard alloy thrust blocks which are high in strength and better in wear resistance.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (5)
1. The utility model provides a thrust structure for roller bit, roller bit (1) includes cone (2) and bit leg (3), bit leg (3) have installation department (31), and this installation department (31) are the step shaft form, a central air vent (311) have been seted up along its axial on installation department (31), set up on roller bit (2) with installation department (31) corresponding mounting hole (21), on installation department (31) of bit leg (3) were located through the bearing housing in mounting hole (21) of roller bit (1), its characterized in that: the thrust structure comprises a cone thrust block (4) and a cone leg thrust block (5), the cone thrust block (4) and the cone leg thrust block (5) are oppositely arranged in the axial direction of a cone (2) and are in contact fit with each other, the cone thrust block (4) is in interference fit with the inner wall of the top of the mounting hole (21), the cone leg thrust block (5) is in interference fit with the mounting part (31), the cone thrust block (4) protrudes out of the hole wall of the top of the mounting hole (21) or the cone leg thrust block (5) protrudes out of the mounting part (31), and therefore a gap (6) is formed between the inner wall of the top of the mounting hole (21) and the mounting part (31);
one surface of the cone thrust block (4) which is in contact with the cone leg thrust block (5) is a cone leg thrust surface (41), one surface of the cone leg thrust block (5) which is in contact with the cone leg thrust block (4) is a cone leg thrust surface (51), and one of the cone leg thrust surface (41) and the cone leg thrust surface (51) is provided with an oil storage groove (7);
the bit leg thrust block (5) is provided with a center hole (52), one end of the center hole (52) is communicated with the center vent hole (311), and the other end of the center hole penetrates through the bit leg thrust surface (51) and is communicated with the oil storage tank (7).
2. A thrust structure for a roller cone drill bit according to claim 1, wherein: the oil storage tank (7) is a straight tank or a V-shaped tank.
3. A thrust structure for a roller cone drill bit according to claim 1, wherein: the gap (6) is 0.5-1.5 mm.
4. A thrust structure for a roller cone drill bit according to claim 1, wherein: the outer contours of the cone thrust block (4) and the cone leg thrust block (5) are both polygonal.
5. A thrust structure for a roller cone drill bit according to claim 1, wherein: the cone thrust block (4) and the cone leg thrust block (5) are both hard alloy thrust blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922417671.9U CN211874397U (en) | 2019-12-27 | 2019-12-27 | Thrust structure for roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922417671.9U CN211874397U (en) | 2019-12-27 | 2019-12-27 | Thrust structure for roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211874397U true CN211874397U (en) | 2020-11-06 |
Family
ID=73262470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922417671.9U Active CN211874397U (en) | 2019-12-27 | 2019-12-27 | Thrust structure for roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211874397U (en) |
-
2019
- 2019-12-27 CN CN201922417671.9U patent/CN211874397U/en active Active
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