CN215485898U - Rotary positioning sleeve and rock drill - Google Patents
Rotary positioning sleeve and rock drill Download PDFInfo
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- CN215485898U CN215485898U CN202121578393.6U CN202121578393U CN215485898U CN 215485898 U CN215485898 U CN 215485898U CN 202121578393 U CN202121578393 U CN 202121578393U CN 215485898 U CN215485898 U CN 215485898U
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- positioning sleeve
- rotary positioning
- spline teeth
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- 239000011435 rock Substances 0.000 title claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses a rotary positioning sleeve and a rock drill. The structure of the rotary positioning sleeve is improved, the forming difficulty of the positioning sleeve is reduced, and the production and the processing are convenient.
Description
Technical Field
The utility model relates to the field of rock drills, in particular to a rotary positioning sleeve and a rock drill.
Background
The driver is mounted in the gearbox of the rock drilling machine for transmitting torque and rotation to the drill steel in the rock drilling machine, the driver being a replaceable part that is subject to wear. During the transfer, the driver has a polygonal profile on the outside and splines on the inside, and the drill steel is axially movable in the driver.
Chinese patent drive for torque and rotation transfer from a rotating chuck to drill steel, application (patent) No.: CN201180032053.6, discloses that the cross-sectional exterior of the driver is defined by curves, in particular circular arcs, which combine to form a closed figure, which can be approximately described as a polygon; and the driver is internally defined by splines in cross-section. The pattern includes four sides and four corners. The spline comprises a plurality of spline teeth, and the number of the spline teeth can be divided by 4.
However, the above-described actuator has the following problems: in order to be able to adapt the installation, the structural accuracy of the drive is required to be high. The outer graph of the cross section of the driver comprises four edges and four corners, so that inconvenience exists in forming and processing, and the forming precision of a product can be ensured only by multiple processing procedures. Thereby resulting in high processing cost and low production efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a rotary positioning sleeve and a rock drill, which improve the structure of the rotary positioning sleeve, reduce the forming difficulty of the positioning sleeve and facilitate production and processing.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the basic shape of the outer contour of the cross section of the rotary positioning sleeve is a circle, a plurality of first limiting grooves used for assembly are formed in the outer peripheral surface of the rotary positioning sleeve, and the first limiting grooves are formed in the axial direction of the rotary positioning sleeve.
Compared with the prior art, the rotary positioning sleeve structure has the advantages that the rotary positioning sleeve structure with the basic shape of the outer contour of the cross section being a circle is adopted. Compared with the prior art that four edges and four corners need to be formed in a driving mode, the circular pipe fitting is directly formed in the production and processing process, the forming difficulty is lower, and the production and processing are more convenient. The gear positioning device is provided with a plurality of first limiting grooves, the first limiting grooves are used for limiting after assembly, and the rotating positioning sleeve and the gear are not rotated relatively after being installed on the gear by matching with the positioning structure. The first limiting groove can be obtained by further simple processing after the round pipe fitting is molded. The rotary positioning sleeve structure is improved, the forming difficulty of the positioning sleeve is reduced, and the production and the processing are convenient.
According to an embodiment of the present invention, the first limiting grooves are regularly distributed on the rotating positioning sleeve. In the rotating process of the rotary positioning sleeve, stress can be uniformly dispersed to each part through the first limiting grooves and the positioning structures matched with the first limiting grooves, so that the local stress abrasion of the rotary positioning sleeve is reduced, and the service life of the rotary positioning sleeve is prolonged.
Preferably, the outer circumferential surface of the rotary positioning sleeve is provided with four first limiting grooves. The rotary positioning sleeve is evenly divided into four equal parts.
According to an embodiment of the present invention, the rotary positioning sleeve is provided with an internal spline, and the internal spline comprises a plurality of internal spline teeth. The utility model transmits torque and rotation by the engagement of the internal spline and the drill shank.
According to an embodiment of the utility model, the basic shape of the cross section of the internal spline teeth is trapezoidal. Specifically, one side surface of the internal spline tooth close to the axis of the rotary positioning sleeve is an inwards-concave first arc-shaped surface. More specifically, the radius of the first arc surface is equal to the distance from the axis of the rotary positioning sleeve to the first arc surface. The utility model can process and form a round pipe fitting first, and then process and get the internal spline on the inner wall of the round pipe fitting.
A rock drill comprises a drill bit shank, a gear, a plurality of positioning pins and a rotary positioning sleeve, wherein the drill bit shank is provided with an external spline, the external spline is matched with an internal spline of the rotary positioning sleeve, and the drill bit shank is meshed with the rotary positioning sleeve.
According to an embodiment of the utility model, the external spline comprises a plurality of external spline teeth.
According to an embodiment of the utility model, the basic shape of the cross section of the external spline tooth is trapezoidal. Specifically, one side surface of the external spline tooth, which is far away from the axis of the drill shank, is a second arc-shaped surface which protrudes outwards. More specifically, the radius of the second arcuate surface is equal to the distance from the shank axis to the second arcuate surface. The drill shank of the utility model can be processed into a round pipe fitting, and then the outer wall surface of the round pipe fitting is processed to obtain the outer spline.
According to an embodiment of the present invention, the thickness of the tooth top of the external spline tooth is greater than the distance between the tooth roots of two adjacent internal spline teeth. That is, in the state where the shank adapter is engaged with the rotary set sleeve, there is still a gap between the tooth tips of the male spline teeth and the tooth roots of the female spline teeth. The structure arrangement can avoid the abrasion of the external spline teeth of the drill shank under the state of meshing with the rotary positioning sleeve.
According to an embodiment of the utility model, there is a gap between the tooth tip of the internal spline teeth and the tooth root of the external spline teeth. And by the same reason, the abrasion of the internal spline teeth can be avoided.
According to an embodiment of the utility model, the gear sleeve is arranged outside the rotary positioning sleeve, and the inner wall of the gear is provided with a plurality of second limiting grooves.
According to an embodiment of the present invention, the second position-limiting grooves correspond to the first position-limiting grooves one to one, the first position-limiting grooves are disposed opposite to the second position-limiting grooves, and cross sections of the first position-limiting grooves and the second position-limiting grooves are circular.
According to an embodiment of the present invention, the first and second limiting grooves form a circular channel for inserting the positioning pin.
According to an embodiment of the present invention, a cross section of the second limiting groove is a major arc, and a cross section of the first limiting groove is a minor arc. That is to say, the locating pin is located the second spacing inslot, and the second spacing groove wraps up its most, and the locating pin can be located the second spacing inslot and does not drop. When the rotary positioning sleeve needs to be replaced, the rotary positioning sleeve is axially disassembled, and the positioning pin can be kept in the second limiting groove and does not fall off, so that the rotary positioning sleeve is convenient to assemble, disassemble and replace.
According to an embodiment of the utility model, the device further comprises a housing and a bearing, the rotary positioning sleeve is arranged in the housing, and the bearing is arranged between the rotary positioning sleeve and the housing. The friction force of the shell and the rotary positioning sleeve when relative rotation occurs can be reduced by arranging the bearing.
Drawings
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the utility model. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of a rotary positioning sleeve according to the present invention;
FIG. 2 is a cross-sectional view of the rotating position sleeve of the present invention;
fig. 3 is a schematic view of the construction of a rock drill according to the utility model;
fig. 4 is a partially enlarged view of a portion a in fig. 3.
Wherein the reference numerals are specified as follows: 1. rotating the positioning sleeve; 2. a first limit groove; 3. internal spline teeth; 3a, a first arc-shaped surface; 4. a drill shank; 5. a gear; 6. positioning pins; 7. an outer spline tooth; 7a, a second arc-shaped surface; 8. a second limit groove; 9. a housing; 10. and a bearing.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1 and 2, a first embodiment of a rotary positioning sleeve is: the basic shape of the outer contour of the cross section of the rotary positioning sleeve 1 is a circle. Compared with the prior art that four edges and four corners need to be formed in a driving mode, the circular pipe fitting is directly formed in the production and processing process, the forming difficulty is lower, and the production and processing are more convenient. The outer peripheral surface of the rotary positioning sleeve 1 is provided with a plurality of first limiting grooves 2 for assembly, and the first limiting grooves 2 are arranged along the axial direction of the rotary positioning sleeve 1. First spacing groove 2 is used for spacing after the assembly, cooperation location structure for behind rotational positioning cover 1 installed on gear 5, relative rotation does not take place for both. The first limiting groove 2 can be obtained by further simple processing after the round pipe fitting is molded. The utility model improves the structure of the rotary positioning sleeve 1, reduces the forming difficulty of the positioning sleeve and is convenient for production and processing.
The second embodiment of the rotary positioning sleeve 1 is further improved on the basis of the first embodiment: the first limit grooves 2 are regularly distributed on the rotary positioning sleeve 1. In the rotation process of the rotary positioning sleeve 1, stress can be uniformly dispersed to each part through the plurality of first limiting grooves 2 and the positioning structure matched with the first limiting grooves, so that the local stress abrasion of the rotary positioning sleeve 1 is reduced, and the service life of the rotary positioning sleeve 1 is prolonged. Preferably, four first limiting grooves 2 are formed in the outer peripheral surface of the rotary positioning sleeve 1. The rotary positioning sleeve 1 is evenly divided into four equal parts.
The rotary positioning sleeve 1 is provided with an internal spline, and the internal spline comprises a plurality of internal spline teeth 3. The utility model is engaged with the drill shank 4 through the internal spline to transmit torque and rotation. The basic shape of the cross section of the internal spline teeth 3 is trapezoidal. Specifically, one side surface of the internal spline tooth 3 close to the axis of the rotary positioning sleeve 1 is an inwards concave first arc-shaped surface 3 a. More specifically, the radius of the first arc-shaped surface 3a is equal to the distance from the axis of the rotary positioning sleeve 1 to the first arc-shaped surface 3 a. The utility model can process and form a round pipe fitting first, and then process and get the internal spline on the inner wall of the round pipe fitting.
A rock drill, as shown in fig. 3 and 4, the first embodiment thereof is: the drill bit shank comprises a drill bit shank 4, a gear 5, a plurality of positioning pins 6 and the rotary positioning sleeve 1, wherein the drill bit shank 4 is provided with an external spline, the external spline is matched with an internal spline of the rotary positioning sleeve 1, and the drill bit shank 4 is meshed with the rotary positioning sleeve 1.
An embodiment two of the rock drilling machine is further improved on the basis of the embodiment one: the external splines comprise a plurality of external spline teeth 7. The basic shape of the cross section of the external spline teeth 7 is trapezoidal. Specifically, one side surface of the external spline tooth 7 away from the axis of the shank 4 is a second arc-shaped surface 7a protruding outwards. More specifically, the radius of the second arc-shaped surface 7a is equal to the distance from the axis of the shank 4 to the second arc-shaped surface 7 a. The drill shank 4 of the utility model can be processed into a round pipe fitting, and then the outer wall surface of the round pipe fitting is processed to obtain the external spline.
The thickness of the tooth top of the external spline tooth 7 is larger than the distance between the tooth roots of two adjacent internal spline teeth 3. That is, in the state where the shank 4 is engaged with the rotary set sleeve 1, there is still a gap between the tooth tips of the male spline teeth 7 and the tooth roots of the female spline teeth 3. The structural arrangement can avoid the abrasion of the external spline teeth 7 of the drill shank 4 in the state of being meshed with the rotary positioning sleeve 1. There is a gap between the tooth tip of the female spline teeth 3 and the tooth root of the male spline teeth 7. By the same token, wear of the internal spline teeth 3 can be avoided.
The gear 5 is sleeved outside the rotary positioning sleeve 1, and a plurality of second limiting grooves 8 are formed in the inner wall of the gear 5. The second limiting grooves 8 correspond to the first limiting grooves 2 one by one, the first limiting grooves 2 are opposite to the second limiting grooves 8, and the cross sections of the first limiting grooves 2 and the second limiting grooves 8 are circular. The first limiting groove 2 and the second limiting groove 8 form a circular channel for inserting the positioning pin 6. The cross section of the second limiting groove 8 is a major arc, and the cross section of the first limiting groove 2 is a minor arc. That is to say, locating pin 6 is located second spacing inslot 8, and second spacing inslot 8 wraps up its most, and locating pin 6 can be located second spacing inslot 8 and does not drop. When the rotary positioning sleeve 1 needs to be replaced, the rotary positioning sleeve 1 is axially disassembled, and the positioning pin 6 can be kept in the second limiting groove 8 and cannot fall off, so that the rotary positioning sleeve is convenient to assemble, disassemble and replace.
The device also comprises a shell 9 and a bearing 10, wherein the rotary positioning sleeve 1 is arranged in the shell 9, and the bearing 10 is arranged between the rotary positioning sleeve 1 and the shell 9. The provision of the bearing 10 can reduce the friction between the housing 9 and the rotary positioning sleeve 1 when relative rotation occurs.
The present invention has been described in detail, and the principles and embodiments of the present invention have been described herein using specific examples, which are provided only to assist in understanding the present invention and the core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. The rotary positioning sleeve is characterized in that the basic shape of the outer contour of the cross section of the rotary positioning sleeve (1) is a circle, a plurality of first limiting grooves (2) for assembly are formed in the outer peripheral surface of the rotary positioning sleeve (1), and the first limiting grooves (2) are arranged in the axial direction of the rotary positioning sleeve (1); the rotary positioning sleeve (1) is provided with an internal spline, and the internal spline comprises a plurality of internal spline teeth (3).
2. A rotary positioning sleeve according to claim 1, wherein the cross-section of the internal spline teeth (3) is substantially trapezoidal, one side of the internal spline teeth (3) close to the axis of the rotary positioning sleeve (1) is an inwardly concave first arc-shaped surface (3a), and the radius of the first arc-shaped surface (3a) is equal to the distance from the axis of the rotary positioning sleeve (1) to the first arc-shaped surface (3 a).
3. A rock drill characterized by comprising a shank adapter (4), a gear (5), a plurality of locating pins (6) and a rotational locating sleeve (1) according to any one of claims 1 or 2, said shank adapter (4) being provided with external splines matching internal splines of the rotational locating sleeve (1), said shank adapter (4) being in engagement with the rotational locating sleeve (1).
4. A rockdrill according to claim 3, wherein the external splines include a plurality of external spline teeth (7).
5. A rock drill according to claim 4 characterized in that the outer spline teeth (7) are trapezoidal in cross-section, the outer spline teeth (7) having an outwardly convex second arcuate surface (7a) on the side remote from the shank adapter (4) axis, the second arcuate surface (7a) having a radius equal to the distance from the shank adapter (4) axis to the second arcuate surface (7 a).
6. A rock drill according to claim 4 or 5 characterized in that the thickness of the tip of the male spline tooth (7) is greater than the distance between the roots of two adjacent female spline teeth (3).
7. A rockdrill according to claim 3, wherein the gear (5) is fitted around the rotary locating sleeve (1), and the inner wall of the gear (5) is provided with a plurality of second limiting grooves (8).
8. A rock drill according to claim 7 characterized in that the first retaining groove (2) and the second retaining groove (8) form a circular channel into which the locating pin (6) is inserted.
9. A rock drill according to claim 8 characterized in that the cross section of the second retaining groove (8) is a major arc and the cross section of the first retaining groove (2) is a minor arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121578393.6U CN215485898U (en) | 2021-07-12 | 2021-07-12 | Rotary positioning sleeve and rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121578393.6U CN215485898U (en) | 2021-07-12 | 2021-07-12 | Rotary positioning sleeve and rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215485898U true CN215485898U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121578393.6U Active CN215485898U (en) | 2021-07-12 | 2021-07-12 | Rotary positioning sleeve and rock drill |
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| Country | Link |
|---|---|
| CN (1) | CN215485898U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464062A (en) * | 2021-07-12 | 2021-10-01 | 江西沃斯德凿岩液压有限公司 | Rock drill |
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2021
- 2021-07-12 CN CN202121578393.6U patent/CN215485898U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464062A (en) * | 2021-07-12 | 2021-10-01 | 江西沃斯德凿岩液压有限公司 | Rock drill |
| CN113464062B (en) * | 2021-07-12 | 2024-07-09 | 江西沃思德凿岩液压有限公司 | Rock drill |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 337000 Penggao Town (Shangli Industrial Park), Pingxiang Economic and Technological Development Zone, Pingxiang City, Jiangxi Province Patentee after: Jiangxi Worth Rock Drilling Hydraulic Co.,Ltd. Address before: 337009 Penggao Town, Shangli County, Pingxiang City, Jiangxi Province (Shangli Industrial Park) Patentee before: Jiangxi wosd rock drilling hydraulic Co.,Ltd. |