CN212535549U - Liftable drilling rod uide bushing structure - Google Patents
Liftable drilling rod uide bushing structure Download PDFInfo
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- CN212535549U CN212535549U CN202021531942.XU CN202021531942U CN212535549U CN 212535549 U CN212535549 U CN 212535549U CN 202021531942 U CN202021531942 U CN 202021531942U CN 212535549 U CN212535549 U CN 212535549U
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Abstract
The utility model belongs to the technical field of drilling equipment, in particular to a liftable drill rod guide sleeve structure, which comprises a drill rod component, a telescopic component and a support component; the drill rod component is connected with the support component in a sliding mode, the drill rod component is positioned on the right side of the support component, and the drill rod component is positioned on the right rear side of the telescopic component; the drill rod component comprises a drill rod, a guide sleeve, a drill rod guide flange and a fixing seat, the guide sleeve is fixedly connected with a concentric shaft of the drill rod guide flange, the drill rod guide flange is connected with the concentric shaft of the drill rod in a sliding mode, and the drill rod is vertically downward and parallel to the right plane of the support component. The problem of prior art's drilling hang down straightness not good and can not avoid the dust to scatter is solved.
Description
Technical Field
The utility model belongs to the technical field of drilling, concretely relates to liftable drilling rod uide bushing structure.
Background
Chinese patent 104227055B discloses a drilling apparatus comprising: a drilling machine having a housing and a drive, in which drilling machine a rotatably mounted machine shaft is provided; and comprises a drill chuck for coupling to a drive, having a chuck body which is coupled in a rotationally fixed manner to a machine shaft and in which chuck body clamping jaws which can be adjusted by means of a threaded connection between a threaded bushing which is connected in a rotationally fixed manner to a drive pin and a driver are guided, and an adjustment sleeve which can be adjusted between a drilling mode and a clamping mode in which the clamping jaw adjustment can be effected. Corresponding contact surfaces are formed on the drive pin and the drive for forming a direct-acting form-fit connection. The adjusting sleeve is spatially separated from the driver in a staggered manner along the axial direction to the drill chuck. The adjusting sleeve is permanently connected to the machine shaft in a rotationally fixed and axially displaceable manner.
Chinese patent (application number: CN201410432744.0, publication (announcement) number: CN104314466A) also discloses a drilling machine, which comprises a travelling mechanism and a drilling machine body, wherein the drilling machine body is arranged on the travelling mechanism, the travelling mechanism is driven by a hydraulic motor or a hydraulic oil cylinder, the drilling machine body comprises a power source, an attitude mechanism, a double-station power head and an operating platform, and the power source is positioned at the back of the drilling machine body and provides power and balance weight for the drilling machine body; the attitude mechanism comprises an attitude main arm, an attitude sliding arm and an attitude big arm; the double-station power head is arranged on the posture big arm and driven by the left-right moving oil cylinder, so that the alternative use of the hydraulic impact rotary drilling station and the high-pressure rotary spraying station is realized.
The disadvantages and shortcomings of the prior art drilling equipment are:
1. the drill rod of the existing drilling machine is not provided with a guide device during drilling, so that the stability is not high;
2. the verticality of the formed hole cannot be guaranteed;
3. and the dust catching cover is not arranged, so that dust can not be prevented from scattering, and the requirement of environmental protection standard can not be met.
In conclusion, the existing drilling equipment has a plurality of defects and shortcomings, the dustproof device of the guide sleeve of the lifting drill rod is not easy to replace, the drill rod cannot move up and down, the verticality of the drill rod cannot be ensured when the drill rod works, the verticality of formed holes cannot be ensured, the guide sleeve can not be replaced, the guide sleeve cannot be suitable for different drilling tools, and the drilling tool is poor in sealing property; a large amount of dust generated during drilling scatters around, and the requirement of environmental protection standard cannot be met.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned weak point that exists among the prior art, the utility model provides a liftable drilling rod uide bushing structure for solve prior art's drilling hang down straightness not good and can not avoid the problem that the dust scatters.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a liftable drill rod guide sleeve structure comprises a drill rod component, a telescopic component and a support component, wherein the telescopic component is arranged on the support component, and the drill rod component is connected with the support component through the telescopic component;
the drill rod assembly is located the bracket component side and rather than fixed connection, the drill rod assembly includes drilling rod and uide bushing, the uide bushing is installed on the fixing base, the drilling rod passes through the drilling rod guide flange and is connected with the uide bushing, just the drilling rod passes the centre bore of drilling rod guide flange and rather than swing joint.
Preferably, the drill rod assembly further comprises a drill rod guide flange and a fixed seat, the fixed seat is slidably connected to the support assembly, the guide sleeve is mounted on the fixed seat, the drill rod is connected to the guide sleeve through the drill rod guide flange, and the drill rod penetrates through a center hole of the drill rod guide flange and is movably connected with the drill rod guide flange.
Preferably, the drill rod assembly further comprises a dust catching cover, the dust catching cover is located on the lower surface of the drill rod guide flange, the dust catching cover is horn-shaped, the flaring of the horn is downward, the dust catching cover is provided with a flaring, the drill rod guide flange is fixedly connected with the dust catching cover, and the drill rod penetrates through the through hole of the drill rod guide flange and the flaring center of the dust catching cover.
Preferably, the bracket component comprises a drill boom guide rail, the fixed seat is located on the side face of the drill boom guide rail, the fixed seat is parallel to the contact surface of the drill boom guide rail, and the fixed seat is in sliding connection with the drill boom guide rail.
Preferably, the support assembly further comprises a drill boom, the drill boom guide rail is located on the side surface of the drill boom, and the side surface of the drill boom guide rail is fixedly connected with the drill boom.
Preferably, the flexible subassembly includes fixing base under the flexible hydro-cylinder of uide bushing, the hydro-cylinder and on the hydro-cylinder, fixing base and bracket component connection on the hydro-cylinder, fixing base and drill rod component connection under the hydro-cylinder, the flexible hydro-cylinder of uide bushing is located under the hydro-cylinder between the fixing base on fixing base and the hydro-cylinder, fixing base fixed connection under the flexible hydro-cylinder lower part of uide bushing and the hydro-cylinder, fixing base fixed connection on the flexible hydro-cylinder upper portion of uide bushing and the hydro-cylinder.
Preferably, the bracket component side is equipped with the fixed block subassembly, drilling rod subassembly upper portion is equipped with power motor, the fixed block subassembly is in the power motor side to with power motor fixed connection.
Preferably, the drill rod is connected with a power motor.
Preferably, the fixed block assembly further comprises a first sliding block, a second sliding block and a fixed plate, the first sliding block and the second sliding block are connected to the drill boom guide rail in parallel, and the first sliding block is fixedly connected with the fixed plate through the second sliding block.
Drawings
Fig. 1 is a schematic front view of an embodiment of a guide sleeve structure of a liftable drill rod of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is an enlarged view of the structure at B in FIG. 1;
fig. 4 is a schematic perspective view (a first view angle) of an embodiment of a guide sleeve structure of a liftable drill rod according to the present invention;
fig. 5 is a schematic perspective view (second view angle) of an embodiment of a guide sleeve structure of a liftable drill rod according to the present invention;
fig. 6 is a schematic view of a rear view structure of an embodiment of a liftable drill rod guide sleeve structure of the present invention.
Reference numerals in the drawings of the specification include: the drill rod assembly comprises a drill rod assembly 1, a drill rod 11, a guide sleeve 12, a drill rod guide flange 13, a fixed seat 14, a telescopic assembly 2, a guide sleeve telescopic oil cylinder 21, an oil cylinder lower fixed seat 22, an oil cylinder upper fixed seat 23, a support assembly 3, a drill arm guide rail 31, a drill arm 32, a dust catching cover 4, a fixed block assembly 5, a first sliding block 51, a second sliding block 52, a fixed plate 53 and a power motor 6.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the technical solution of the present invention is further explained below with reference to the accompanying drawings and embodiments:
the first embodiment is as follows:
as shown in fig. 1-6, a liftable drill rod guide sleeve structure comprises a drill rod assembly 1, a telescopic assembly 2 and a support assembly 3, wherein the telescopic assembly 2 is mounted on the support assembly 3, and the drill rod assembly 1 is connected with the support assembly 3 through the telescopic assembly 2;
the drill rod assembly 1 is positioned at the side of the bracket assembly 3 and fixedly connected with the bracket assembly, the drill rod assembly 1 comprises a drill rod 11 and a guide sleeve 12, the guide sleeve 12 is arranged on a fixed seat 14, the drill rod 11 is connected with the guide sleeve 12 through a drill rod guide flange 13, and the drill rod 11 passes through a central hole of the drill rod guide flange 13 and is movably connected with the drill rod guide flange. Such an arrangement provides a higher perpendicularity of the apparatus drilling and also provides a more stable and efficient drilling process of the entire drill rod 11.
Preferably, the drill rod assembly 1 further comprises a drill rod guide flange 13 and a fixed seat 14, the fixed seat 14 is slidably connected on the support assembly 3, the guide sleeve 12 is mounted on the fixed seat 14, the drill rod 11 is connected with the guide sleeve 12 through the drill rod guide flange 13, and the drill rod 11 passes through a central hole of the drill rod guide flange 13 and is movably connected with the drill rod guide flange 13. The drill rod guide flange 13 is used for further improving the stability and the verticality of the drill rod 11, and the fixing seat 14 is used for providing a fixing mechanism for the installation of the drill rod guide flange 13.
Preferably, the drill rod assembly 1 further comprises a dust catching cover 4, the dust catching cover 4 is positioned on the lower surface of the drill rod guide flange 13, the dust catching cover 4 is horn-shaped, the flaring of the horn is downward, the dust catching cover 4 is provided with a flaring, the drill rod guide flange 13 is fixedly connected with the dust catching cover 4, and the drill rod 11 passes through a hole in the drill rod guide flange 13 and the center of the flaring of the dust catching cover 4. The dust catching cover 4 is arranged in a horn shape, so that dust generated by drilling can be prevented from diffusing everywhere, the working environment of workers can be improved, the requirement of the environmental protection standard is met, the dust catching cover 4 can move along with the up-and-down movement of the drill rod guide flange 13, the dust catching cover 4 can move in height according to the change of the drilling depth, and the best effect of preventing the dust from diffusing everywhere is achieved.
Preferably, the bracket assembly 3 includes a drill boom guide rail 31, the fixing seat 14 is located on a side surface of the drill boom guide rail 31, the fixing seat 14 is parallel to a contact surface of the drill boom guide rail 31, and the fixing seat 14 is slidably connected with the drill boom guide rail 31. Such setting is favorable to very much steadily reciprocating fixing base 14 and the uide bushing 12, the drilling rod guide flange 13 etc. of relevant, and fixing base 14 is parallel with the drill boom guide rail 31 contact surface, can guarantee that fixing base 14 keeps the depth of parallelism with the contact surface when reciprocating, and then keeps higher depth of parallelism when making its structure of relevant can the up-and-down translation, the counterpoint of being convenient for simultaneously, the uide bushing 12 can guarantee the straightness that hangs down of drilling rod 11 when drilling rod 11 is worked to guarantee the straightness that hangs down of pore-forming.
Preferably, the support assembly 3 further comprises a drill boom 32, the drill boom rail 31 is located at the side of the drill boom 32, and the side of the drill boom rail 31 is fixedly connected with the drill boom 32. The purpose of the drill boom 32 is to provide a base structure for the fixation of the drill rod assembly 1, the telescopic assembly 2 and the fixed block assembly 5, and to integrate the respective assemblies, so that the whole is more stable and reliable.
Example two:
as a further improvement of the previous embodiment, as shown in fig. 1 to 6, the present embodiment is a liftable drill rod guide sleeve structure, which includes a drill rod assembly 1, a telescopic assembly 2 and a support assembly 3, wherein the telescopic assembly 2 is mounted on the support assembly 3, and the drill rod assembly 1 is connected with the support assembly 3 through the telescopic assembly 2;
the drill rod assembly 1 is positioned at the side of the bracket assembly 3 and fixedly connected with the bracket assembly, the drill rod assembly 1 comprises a drill rod 11 and a guide sleeve 12, the guide sleeve 12 is arranged on a fixed seat 14, the drill rod 11 is connected with the guide sleeve 12 through a drill rod guide flange 13, and the drill rod 11 passes through a central hole of the drill rod guide flange 13 and is movably connected with the drill rod guide flange. Such an arrangement provides a higher perpendicularity of the apparatus drilling and also provides a more stable and efficient drilling process of the entire drill rod 11.
Preferably, the drill rod assembly 1 further comprises a drill rod guide flange 13 and a fixed seat 14, the fixed seat 14 is slidably connected on the support assembly 3, the guide sleeve 12 is mounted on the fixed seat 14, the drill rod 11 is connected with the guide sleeve 12 through the drill rod guide flange 13, and the drill rod 11 passes through a central hole of the drill rod guide flange 13 and is movably connected with the drill rod guide flange 13. The drill rod guide flange 13 is used for further improving the stability and the verticality of the drill rod 11, and the fixing seat 14 is used for providing a fixing mechanism for the installation of the drill rod guide flange 13.
Preferably, the drill rod assembly 1 further comprises a dust catching cover 4, the dust catching cover 4 is positioned on the lower surface of the drill rod guide flange 13, the dust catching cover 4 is horn-shaped, the flaring of the horn is downward, the dust catching cover 4 is provided with a flaring, the drill rod guide flange 13 is fixedly connected with the dust catching cover 4, and the drill rod 11 passes through a hole in the drill rod guide flange 13 and the center of the flaring of the dust catching cover 4. The dust catching cover 4 is arranged in a horn shape, so that dust generated by drilling can be prevented from diffusing everywhere, the working environment of workers can be improved, the requirement of the environmental protection standard is met, the dust catching cover 4 can move along with the up-and-down movement of the drill rod guide flange 13, the dust catching cover 4 can move in height according to the change of the drilling depth, and the best effect of preventing the dust from diffusing everywhere is achieved.
Preferably, the bracket assembly 3 includes a drill boom guide rail 31, the fixing seat 14 is located on a side surface of the drill boom guide rail 31, the fixing seat 14 is parallel to a contact surface of the drill boom guide rail 31, and the fixing seat 14 is slidably connected with the drill boom guide rail 31. Such setting is favorable to very much steadily reciprocating fixing base 14 and the uide bushing 12, the drilling rod guide flange 13 etc. of relevant, and fixing base 14 is parallel with the drill boom guide rail 31 contact surface, can guarantee that fixing base 14 keeps the depth of parallelism with the contact surface when reciprocating, and then keeps higher depth of parallelism when making its structure of relevant can the up-and-down translation, the counterpoint of being convenient for simultaneously, the uide bushing 12 can guarantee the straightness that hangs down of drilling rod 11 when drilling rod 11 is worked to guarantee the straightness that hangs down of pore-forming.
Preferably, the support assembly 3 further comprises a drill boom 32, the drill boom rail 31 is located at the side of the drill boom 32, and the side of the drill boom rail 31 is fixedly connected with the drill boom 32. The purpose of the drill boom 32 is to provide a base structure for the fixation of the drill rod assembly 1, the telescopic assembly 2 and the fixed block assembly 5, and to integrate the respective assemblies, so that the whole is more stable and reliable.
As preferred scheme, flexible subassembly 2 includes the flexible hydro-cylinder 21 of uide bushing, under the hydro-cylinder fixing base 22 and on the hydro-cylinder fixing base 23, on the hydro-cylinder fixing base 23 is connected with bracket component 3, under the hydro-cylinder fixing base 22 is connected with drill rod subassembly 1, the flexible hydro-cylinder 21 of uide bushing is located under the hydro-cylinder fixing base 22 and on the hydro-cylinder fixing base 23 between, the flexible hydro-cylinder 21 lower part of uide bushing and hydro-cylinder fixing base 22 fixed connection, the flexible hydro-cylinder 21 upper portion of uide bushing and hydro-cylinder fixing base 23. The height of the fixed seat 14 and the associated guide sleeve 12, drill rod guide flange 13 and the like can be adjusted along with the depth of the drilled hole, so that the depth of the drilled hole is more flexible.
Preferably, the side surface of the support component 3 is provided with a fixed block component 5, the upper part of the drill rod component 1 is provided with a power motor 6, and the fixed block component 5 is arranged on the side surface of the power motor 6 and is fixedly connected with the power motor 6. Fixed block subassembly 5 sets up in the same one side with power motor 6, plays the effect of fixed power motor 6, and its fixed block subassembly 5 has guaranteed that power motor 6 can keep on perpendicular decurrent direction because the right flank parallel of bracket component 3 is fixed, and fixed block subassembly 5 makes power motor 6 just at appropriate horizontal distance again, plays the effect of guaranteeing the straightness that hangs down with uide bushing 12 equally for vertical direction's stability is stronger.
Preferably, the drill rod 11 is connected with the power motor 6. Such setting up can not appear vibrating the phenomenon when making motor power output power pass through drilling rod 11 and holing, if do not have concentric shaft connection, drilling rod 11 can vibrate the phenomenon because of eccentric and production then to influence the drilling precision, also can make drilling equipment quick loss, so such setting is favorable to the protection of drilling precision and equipment.
Preferably, the fixed block assembly 5 further comprises a first sliding block 51, a second sliding block 52 and a fixed plate 53, the first sliding block 51 and the second sliding block 52 are connected to the drill boom guide rail 31 in parallel, and the first sliding block 51 is fixedly connected to the fixed plate 53 through the second sliding block 52. The setting of fixed block subassembly 5 has included slider one 51, slider two 52 and fixed plate 53, and it is more convenient and stable to have set up like this to make power motor 6's fixed, and two sliders obtain setting up to make power motor 6's straightness that hangs down is higher, guarantee that it can not all produce the circumstances such as aversion or not hard up under violent vibrations operating mode.
The advantages of the second embodiment over the first embodiment are:
the utility model discloses a setting of flexible subassembly 2 in the second embodiment makes fixing base 14 and its associated uide bushing 12, drilling rod guide flange 13 etc. can be along with the degree of depth adjustment height of drilling for drilling depth is more nimble. Fixed block subassembly 5 sets up in the same one side with power motor 6, plays the effect of fixed power motor 6, and its fixed block subassembly 5 has guaranteed that power motor 6 can keep on perpendicular decurrent direction because the right flank parallel of bracket component 3 is fixed, and fixed block subassembly 5 makes power motor 6 just at appropriate horizontal distance again, plays the effect of guaranteeing the straightness that hangs down with uide bushing 12 equally for vertical direction's stability is stronger. The phenomenon that can not appear vibrating when power motor 6's setting makes motor power output power pass through drilling rod 11 and drills, if do not have concentric shaft connection, drilling rod 11 can vibrate the phenomenon because of eccentric and production then to influence the drilling precision, also can make drilling equipment quick loss, so such setting is favorable to the protection of drilling precision and equipment. The setting of fixed block subassembly 5 has included slider one 51, slider two 52 and fixed plate 53, and it is more convenient and stable to have set up like this to make power motor 6's fixed, and two sliders obtain setting up to make power motor 6's straightness that hangs down higher, guarantee that it is under violent vibrations operating mode, all can not produce the circumstances such as aversion or not hard up.
The use method of the liftable drill rod guide sleeve structure comprises the following steps:
s1, moving the drilling equipment for lifting the drill rod guide sleeve to a position needing drilling, keeping the required verticality, aligning the drill rod 11 to the drilling position, starting the power motor 6 to drill, and ensuring that the drill rod 11 passes through the guide sleeve 12 and the drill rod guide flange 13 in the process;
s2, according to the drilling depth, the telescopic assembly 2 can adjust the heights of the guide sleeve 12 and the drill rod guide flange 13, the fixed seat 14 and the dust catching cover 4 which are associated with the guide sleeve, the dust catching cover 4 just covers the drilled hole of the drill rod 11, and the telescopic assembly 2 drives the drill rod 11 to move up and down.
The above are merely examples of the present invention, and common general knowledge of known specific structures and characteristics of the embodiments is not described herein, and those skilled in the art will know all the common technical knowledge in the technical field of the present invention before the application date or priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (8)
1. The utility model provides a liftable drilling rod uide bushing structure which characterized in that: the drill rod assembly comprises a drill rod assembly (1), a telescopic assembly (2) and a support assembly (3), wherein the telescopic assembly (2) is arranged on the support assembly (3), and the drill rod assembly (1) is connected with the support assembly (3) through the telescopic assembly (2);
drill rod subassembly (1) is located bracket component (3) side and rather than fixed connection, drill rod subassembly (1) includes drilling rod (11), uide bushing (12), drilling rod guide flange (13) and fixing base (14), fixing base (14) are in sliding connection on bracket component (3), uide bushing (12) are installed on fixing base (14), drilling rod (11) pass through drilling rod guide flange (13) with uide bushing (12) are connected, just drilling rod (11) pass the centre bore of drilling rod guide flange (13) and rather than swing joint.
2. The liftable drill rod guide sleeve structure as claimed in claim 1, wherein: the drill rod assembly (1) further comprises a dust catching cover (4), the dust catching cover (4) is located on the lower surface of a drill rod guide flange (13), the dust catching cover (4) is horn-shaped, a horn flaring faces downwards, a flaring is arranged on the dust catching cover (4), the drill rod guide flange (13) is fixedly connected with the dust catching cover (4), and a drill rod (11) penetrates through a hole in the drill rod guide flange (13) and the center of the flaring of the dust catching cover (4).
3. The liftable drill rod guide sleeve structure as claimed in claim 2, wherein: bracket component (3) include drill boom guide rail (31) fixing base (14) are located drill boom guide rail (31) side, fixing base (14) are parallel with drill boom guide rail (31) contact surface, fixing base (14) and drill boom guide rail (31) sliding connection.
4. The liftable drill rod guide sleeve structure as claimed in claim 3, wherein: the support assembly (3) further comprises a drill boom (32), the drill boom guide rail (31) is located on the side face of the drill boom (32), and the side face of the drill boom guide rail (31) is fixedly connected with the drill boom (32).
5. The liftable drill rod guide sleeve structure as claimed in claim 4, wherein: telescopic component (2) include fixing base (23) on uide bushing telescopic cylinder (21), fixing base (22) and the hydro-cylinder under the hydro-cylinder, fixing base (23) are connected with bracket component (3) on the hydro-cylinder, fixing base (22) is connected with drilling rod subassembly (1) under the hydro-cylinder, uide bushing telescopic cylinder (21) are located under the hydro-cylinder between fixing base (22) and the hydro-cylinder on fixing base (23), fixing base (22) fixed connection under uide bushing telescopic cylinder (21) lower part and the hydro-cylinder, fixing base (23) fixed connection on uide bushing telescopic cylinder (21) upper portion and the hydro-cylinder.
6. The liftable drill rod guide sleeve structure as claimed in claim 5, wherein: bracket component (3) side is equipped with fixed block subassembly (5), drill rod subassembly (1) upper portion is equipped with motor power (6), fixed block subassembly (5) are in motor power (6) side to with motor power (6) fixed connection.
7. The liftable drill rod guide sleeve structure as claimed in claim 6, wherein: the drill rod (11) is connected with the power motor (6).
8. The liftable drill rod guide sleeve structure as claimed in claim 7, wherein: the fixed block assembly (5) further comprises a first sliding block (51), a second sliding block (52) and a fixed plate (53), the first sliding block (51) and the second sliding block (52) are connected to the drill boom guide rail (31) in parallel, and the first sliding block (51) is fixedly connected with the fixed plate (53) through the second sliding block (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021531942.XU CN212535549U (en) | 2020-07-29 | 2020-07-29 | Liftable drilling rod uide bushing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021531942.XU CN212535549U (en) | 2020-07-29 | 2020-07-29 | Liftable drilling rod uide bushing structure |
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| CN212535549U true CN212535549U (en) | 2021-02-12 |
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| CN202021531942.XU Active CN212535549U (en) | 2020-07-29 | 2020-07-29 | Liftable drilling rod uide bushing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764826A (en) * | 2020-07-29 | 2020-10-13 | 云南云内动力机械制造有限公司 | Liftable drill rod guide sleeve structure and method |
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2020
- 2020-07-29 CN CN202021531942.XU patent/CN212535549U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764826A (en) * | 2020-07-29 | 2020-10-13 | 云南云内动力机械制造有限公司 | Liftable drill rod guide sleeve structure and method |
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