CN103590755A - Key bushing, hub and rotary drilling rig - Google Patents
Key bushing, hub and rotary drilling rig Download PDFInfo
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- CN103590755A CN103590755A CN201310493550.7A CN201310493550A CN103590755A CN 103590755 A CN103590755 A CN 103590755A CN 201310493550 A CN201310493550 A CN 201310493550A CN 103590755 A CN103590755 A CN 103590755A
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Abstract
The invention discloses a key bushing, a hub and a rotary drilling rig. The key bushing comprises a key bushing body and a key bar assembly. Key slots are arranged in the inner wall of the key bushing body. The key bar assembly comprises a plurality of fixed key bars and a plurality of change key bars; the fixed key bars and the change key bars are mounted in the key slots along the axial direction of the key bushing body in a detachable manner, and the thickness of each fixed key bar is smaller than that of each change key bar. The key bushing body is provided with spigots for limiting the key bar assembly axially. The key bushing is adaptable to fitting pieces of various dimensions by the method of mounting the fixed key bars or change key bars of different thickness onto the key bushing body, so that the fitting pieces of different dimensions can be switched quickly on different working conditions, and construction efficiency is increased due to the simple changing. Besides, only the key bars, the most fragile part, need to be replaced once the key bars are damaged, so that the time for changing the parts is shortened and equipment cost can also be reduced.
Description
Technical field
The present invention relates to engineering machinery field, particularly a kind of key cover, wheel hub and rotary drilling rig.
Background technology
Rotary drilling rig is a kind of soil taking hole forming filling pile construction machinery, has power transmission steadily and efficiency advantages of higher, in the foundation constructions such as multiple ground such as castinplace pile, diaphragm wall, underpin, is used widely.The operating principle of rotary drilling rig, for the driving drilling rod by power set, is realized rotary bucket rotary cutting ground, is then promoted to outside hole and unloads soil, through periodic cycle operation, until pore-forming.
Unit head is the critical component that rotary drilling rig power transmits, and the motivation transfer motion part of unit head mainly comprises: input shaft gear, gear wheel, wheel hub casing and defeated in/out axle up/down lid, the structural members such as upper and lower oil seals box.Power produces by motor, and is input to input shaft gear end by reductor, gear wheel and pinion engagement, and wheel hub is fixedly connected with gear wheel, the embedded key cover in wheel hub upper end, the rotary drilling together of key cover jointed rod.Unit head, as the power take-off of rotary drilling rig, is in work progress, be hit and shake the most serious parts, especially revolves and digs the repeated impacts that the key cover contacting with drilling rod in creeping into bears rotating, often needs to change.In addition, in order to meet the construction requirement in piles with different footpath, need to change the different drilling rod of diameter, this just requires to change the key grip assembly matching.Ordinary circumstance is all by complete replacings such as wheel hub, key covers, could mate like this drilling rod construction of different-diameter, complex operation, and efficiency of construction is lower.
Summary of the invention
In view of this, the present invention proposes a kind of can adapt to the drilling rod of sizes and change easy key cover, wheel hub and rotary drilling rig.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of key cover, comprising: key body, described key body inwall is provided with keyway; Key bar assembly, comprises some retainingf key bars and changes key bar, and described retainingf key bar and replacing key bar are installed in described keyway along the axial dismountable of described key body; The thickness of described retainingf key bar is less than the thickness of described replacing key bar; On described key body, be provided with for described key bar assembly being carried out to the key bar seam of axial limiting.
Further, above-mentioned key cover also comprises upper flange and lower flange; Described upper flange is installed on the top of described key body, and described lower flange is installed on the bottom of described key body; The internal diameter of described upper flange and lower flange and the external diameter of counterpart are suitable, and described counterpart is the parts that are connected with key cover key.
Further, described upper flange compresses and contacts with the top of described replacing key bar, and the top of described replacing key bar is provided with the top groove suitable with described upper flange; And/or described lower flange compresses and contact with the bottom of described replacing key bar, and the bottom of described replacing key bar is provided with the bottom groove suitable with described lower flange.
Further, described retainingf key bar and/or replacing key bar are installed in described keyway by bolt, on described retainingf key bar and/or on replacing key bar, are provided with some connecting holes; And, between described bolt and described connecting hole, be provided with packing ring, and have gap between described packing ring and described connecting hole.
The present invention also provides a kind of wheel hub, comprises hub body and the key cover that is embedded in described hub body, and described key overlaps the key cover described in above-mentioned any one.
The present invention also provides a kind of wheel hub, comprising: hub body, and described hub body inwall is provided with keyway; Key bar assembly, described key bar assembly comprises some retainingf key bars and replacing key bar, described retainingf key bar and replacing key bar are installed in described keyway along the axial dismountable of described hub body; The thickness of described retainingf key bar is less than the thickness of described replacing key bar; On described hub body, be provided with for described key bar assembly being carried out to the key bar seam of axial limiting.
Further, above-mentioned wheel hub also comprises upper flange and lower flange; Described upper flange is installed on the top of described hub body, and described lower flange is installed on the bottom of described hub body; The internal diameter of described upper flange and lower flange and the external diameter of counterpart are suitable, and described counterpart is the parts that are connected with wheel hub key.
Further, described upper flange compresses and contacts with the top of described replacing key bar, and the top of described replacing key bar is provided with the top groove suitable with described upper flange; And/or described lower flange compresses and contact with the bottom of described replacing key bar, and the bottom of described replacing key bar is provided with the bottom groove suitable with described lower flange.
Further, described retainingf key bar and/or change key bar and be installed in described keyway by bolt, describedly determine to be provided with some connecting holes on key bar and/or replacing key bar; And, between described bolt and described connecting hole, be provided with packing ring, and have gap between described packing ring and described connecting hole.
The present invention also provides a kind of rotary drilling rig, is provided with the wheel hub described in above-mentioned any one.
The invention provides a kind of key cover, dismountable retainingf key bar and replacing key bar of being provided with in its key body, retainingf key bar is different with replacing key bar thickness, therefore, only need be by the retainingf key cover of different-thickness being installed on key body or being changed the counterpart that key bar can be applicable to sizes, for different operating modes, can switch fast the counterpart of different size, change simply, contribute to improve efficiency of construction.In addition, key bar is the most flimsy part, once it is damaged, only needs directly to change key bar, without changing whole key cover, contributes to shorten the time of changing parts, can reduce equipment cost in addition.
Similarly, wheel hub provided by the invention is dismountable in hub body to be provided with retainingf key bar and to change key bar, retainingf key bar is different with replacing key bar thickness, therefore, only need be by the retainingf key cover of different-thickness being installed on hub body or being changed the counterpart that key bar can be applicable to sizes, for different operating modes, can switch fast the counterpart of different size, change simply, contribute to improve efficiency of construction.In addition, key bar is the most flimsy part, once it is damaged, only needs directly to change key bar, without changing whole wheel hub, contributes to shorten the time of changing parts, can also reduce equipment cost.
The present invention also provides a kind of rotary drilling rig that is provided with above-mentioned key cover or wheel hub, and this rotary drilling rig can switch drilling rod when constructed in piles with different footpath fast, changes simply, contributes to improve efficiency of construction.In addition, once the most flimsy part key bar is damaged, only need directly to change key bar, contribute to shorten the time of changing parts, reduce equipment cost.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
The generalized section that the key that Fig. 1 provides for the embodiment of the present invention one overlaps;
Fig. 2 is the schematic top plan view of Fig. 1;
Fig. 3 is the partial enlarged drawing of A part in Fig. 1;
The generalized section of the wheel hub that Fig. 4 provides for the embodiment of the present invention three.
Description of reference numerals:
1 key body 101 keyways
21 retainingf key bars 22 are changed key bar
221 top groove 222 bottom grooves
31 upper flange 32 lower flanges
41 bolt 42 packing rings
6 hub body 601 keyways
71 retainingf key bars 72 are changed key bar
721 top groove 722 bottom grooves
81 upper flange 82 lower flanges
The specific embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.Below in conjunction with accompanying drawing, each preferred embodiment of the present invention is described further:
The embodiment of the present invention one provides a kind of key cover, refers to Fig. 1, the section that the key that the figure shows the present embodiment provides overlaps.The key cover that the present embodiment provides comprises:
Key bar assembly, comprises some retainingf key bars 21 and changes key bar 22, and retainingf key bar 21 and replacing key bar 22 are installed in keyway 101 along the axial dismountable of key body 1; Wherein, the thickness of retainingf key bar 21 is less than the thickness of changing key bar 22;
On key body 1, be provided with for above-mentioned key bar assembly being carried out to the key bar seam of axial limiting.
In the key cover that the present embodiment provides, key body 1 is agent structure, is installed in wheel hub, for carrying key bar.During rotary drilling rig operation, the key bar of drilling rod matches with the key bar in key cover, and drilling rod drives wheel hub to rotate.Generally, key body 1 is tubular structure.The inwall of key body 1 is provided with keyway 101, and the key bar in key bar assembly is installed in keyway 101, and keyway 101 radially plays position-limiting action to key bar, prevents that key bar is with being radially offset in drilling rod rotation process.In order to prevent that key bar is offset vertically, on key body 1, be also provided with key bar seam.Above-mentioned keyway 101 and key bar seam can be structure well known to those skilled in the art, and the present invention does not hereby repeat.
Key bar in key bar assembly is realized power and is transmitted for matching with the key bar of drilling rod.Unlike the prior art, the key bar assembly of the present embodiment comprises two kinds of key bars that thickness is different, is respectively retainingf key bar 21 and changes key bar 22, and wherein the thickness of retainingf key cover 21 is less than and changes key bar 22; Two kinds of key bars are installed in keyway 101 along the axial dismountable of key body 1.The thickness of above-mentioned key bar refers to: be arranged on key bar in key body 1 radially its bottom to the vertical distance at top.Be that the thickness of key bar has determined the distance of key cover body axis to key bar, also just determined the internal diameter of the drilling rod that can match with this key cover.Therefore, by the retainingf key cover 21 of different-thickness being installed on key body 1 or being changed the drilling rod that key bar 22 can be applicable to sizes.
Generally, under the thickness of retainingf key cover 21 and normality operating mode, use the maximum drilling rod of diameter to match, in use procedure, no longer change.In the time need to changing the less drilling rod of diameter, by changing the replacing key bar 22 of different-thickness, realize.Specific operation process is as follows: in the time need to using the drilling rod of maximum gauge to creep into, only the interior installation retainingf key of key body 1 bar 21(now key body 1 planted agent install that to change the keyway of key bar 22 vacant), after then this key cover being installed in wheel hub.In the time need to changing the less drilling rod of radius, only the replacing key bar 22 that thickness and this drill pipe diameter match need be installed in residue keyway, easy and simple to handle, be conducive to improve efficiency of construction.
Even in order to guarantee that different drilling rods is subject to the active force of key bar, the retainingf key bar 21 in the key grip assembly that the present embodiment provides and change key bar 22 numbers and equate, alternative arrangement.Certainly, the number of keyway 101 is also conventionally many with respect to the number of existing key cover keyway.For example, the number of existing key cover internal keyway is generally three, is six in the present embodiment, and three are used for installing 21, three of retainingf key bars and are used for installing replacing key bar 22.Guarantee that thus drilling rod can produce enough large active force to guarantee driving smoothly key cover to rotate to key bar.
As shown in Figure 1, in the key cover that the present embodiment provides, be also provided with upper flange 31 and lower flange 32; Wherein, upper flange 31 is installed on the top of key body 1, and lower flange 32 is installed on the bottom of key body 1; And this upper flange 31 and the internal diameter of lower flange 32 and the external diameter of drilling rod are suitable.The effect that this upper flange 31 and lower flange 32 are set is: for the less drilling rod of radius, in the process that is installed on this key cover and in rotation process, because gap between the outer of drilling rod and key cover inwall is larger, drilling rod easily and retainingf key bar 21 bump, this is all unfavorable to retainingf key bar 21 and drilling rod, and by the upper flange 31 that two ends up and down arrange and drilling rod external diameter is suitable of key body 1 and the distance that lower flange 32 can effectively reduce drilling rod outer and key overlaps inwall, retainingf key bar 21 is played to the effect of hiding protection, prevent that drilling rod and retainingf key bar 21 from bumping, extend the application life of drilling rod and retainingf key bar 21.Certainly, for the larger drilling rod of diameter, do not need to install and change key bar 22, now without installing flange 31 and lower flange 32 yet; When being replaced by the less drilling rod of diameter, need to install replacing key bar 22 and the upper and lower flange suitable with this drilling rod.
The replacement frequency of the replacing key bar 22 in key grip assembly is larger, dismantles frequently and install easily to make the key bar seam of this key bar wear and tear, and produces changing the not firm problem of key bar 22 axial limitings.In order to solve this technical problem, do not increase again the complexity of key nested structure, upper flange 31, lower flange 32 can be set in the following manner and change key bar 22:
Thus, upper flange 31 and lower flange 32 play fixation to changing top and the bottom of key bar 22 again after being fixed on key body 1, play the effect of axial limiting to changing key bar 22, prevent that the rear key bar 22 of changing of key bar seam wearing and tearing from moving vertically.In top and the bottom of changing key bar 22, arrange after the top groove 221 and bottom groove 222 suitable with upper and lower flange, upper and lower flange can also be assisted to a certain extent 101 pairs, keyway to change key bar 22 and radially be positioned.
Above-mentioned retainingf key bar 21 and/or change key bar 22 and can adopt in the dismountable keyway 101 that is connected in key body 1 of connector well known in the art, to prevent retainingf key bar 21 and to change key bar 22 along the radially generation play of key cover.The connected mode of the present embodiment is concrete refers to Fig. 3, and in the present embodiment, retainingf key bar 21 is installed in keyway 101 by bolt 41, retainingf key bar 21 and/or change on key bar 22 and be provided with some connecting holes; And, between bolt 41 and connecting hole, be provided with packing ring 42, and have gap between packing ring 42 and connecting hole.Thus, guarantee to reduce when bolt is to key bar fixed effect its connection area with key bar as much as possible, during the active force of the drilling rod being subject to when key bar, reducing the stressed of bolt 41, the application life of prolongation bolt 41.It will be understood by those skilled in the art that above-mentioned gap does not refer to inevitable gap between two contact surfaces, but the gap that reserved certain space forms.Obviously, " gap " described in the application is greater than above-mentioned inevitably " gap ".Concrete can be: the two ends of packing ring 42 are fixed by the nut of key body 1 and bolt respectively, and arranges between packing ring 42 and connecting hole and leave gap.In the present embodiment, (refer to Fig. 3), connecting hole is a shoulder hole, packing ring 42 is a T shape cover, the annular portions of T shape cover are arranged on the top (direction shown in " top " described in Fig. 3 should be the direction along key cover radial finger to center) of end face at the ladder position of shoulder hole, the remainder of packing ring 42 is placed in the hole at connecting hole ladder position, and all leave gap between T shape cover and the end face at the above-mentioned ladder of connecting hole position and the hole inwall at ladder position, the double-screw bolt of bolt wore in the rear corresponding screw connecting hole of enter key body 1 of T shape cover, nut is located at T shape cover bossing.The two ends that are packing ring 42 are located by the nut of key body 1 and bolt respectively, and all leave gap between packing ring 42 and the inwall of connecting hole.
Installation and the use procedure of the key cover shown in Fig. 1 are as follows:
For the drilling rod of maximum gauge φ D1 required under normality operating mode, only retainingf key bar 21 need to be installed, adopt retainingf key bar 21 can carry out driving work;
When need to change diameter be the drilling rod of φ D2 (D2 < D1), on the basis of key cover that retainingf key bar 21 is installed, the replacing key bar 22(thickness matching matching with this drilling rod is installed) and upper and lower flange (internal diameter mates), thereby realize, mate with different-diameter drilling rod.
It should be noted that, the key cover that the present embodiment provides be take and is applied to rotary drilling rig as example, and the counterpart connecting with its key is drilling rod.It will be understood by those skilled in the art that this key cover also can be applied in other machinery that has key annexation, counterpart can be other parts accordingly.
As shown in the above, dismountable retainingf key bar and replacing key bar of being provided with in the key cover that the present embodiment provides, retainingf key bar is different with replacing key bar thickness, therefore, only need be by the retainingf key cover of different-thickness being installed on key body or being changed the counterpart that key bar can be applicable to sizes, for different operating modes, can switch fast the counterpart of different size, change simply, contribute to improve efficiency of construction.In addition, key bar is the most flimsy part, once it is damaged, only needs directly to change key bar, without changing whole key cover, contributes to shorten the time of changing parts, can reduce equipment cost in addition.
The embodiment of the present invention two provides a kind of wheel hub, comprises hub body and the key cover that is embedded in described wheel hub, and this key cover is the key cover described in above-described embodiment.Can adopt the connectors such as bolt that key cover is embedded in wheel hub.Because above-mentioned key cover has above-mentioned technique effect, therefore, the wheel hub that is provided with this key cover also should possess corresponding technique effect, and its specific implementation process is similar to the above embodiments, does not hereby repeat.
The embodiment of the present invention three provides another kind of wheel hub, refer to Fig. 4, comprise hub body 6, this hub body inwall is provided with keyway 601, also comprise key bar assembly, key bar assembly comprises some retainingf key bars 71 and replacing key bar 72, and retainingf key bar 71 and replacing key bar 72 are installed in keyway 601 along the axial dismountable of hub body 6; Wherein, the thickness of retainingf key bar 71 is less than the thickness of changing key bar 72;
On hub body 6, be provided with for key bar assembly being carried out to the key bar seam of axial limiting.
The key nested structure that the structure of the wheel hub that the present embodiment provides and embodiment mono-provide is similar, difference is: the wheel hub that the present embodiment provides has omitted the structure of key body, directly in hub body 6 inside, dig keyway 601, retainingf key bar 71 and replacing key bar 72 are installed in this keyway 601.Thereby, during installation, only need and change key bar 72 by retainingf key bar 71 and be installed on the installation that hub body 6 has completed wheel hub and key cover, structure is more succinct.The key providing with embodiment mono-overlaps similarly:
In order to prevent that drilling rod and retainingf key bar 71 from bumping, this wheel hub also comprises upper flange 81 and lower flange 82; Wherein, upper flange 81 is installed on the top of hub body 6, and lower flange 82 is installed on the bottom of hub body 6; The internal diameter of upper flange 81 and lower flange 82 and the external diameter of drilling rod are suitable.
In order to prevent that changing key bar 72 is moved vertically and radially, upper flange 81 compresses and contacts with the top of changing key bar 72, and the top of replacing key bar 72 is provided with the top groove 721 suitable with upper flange 81; And/or lower flange 82 compresses and contacts with the bottom of described replacing key bar 72, and the bottom of replacing key bar 72 is provided with the bottom groove 722 suitable with lower flange 82.
Above-mentioned retainingf key bar 71 and/or replacing key bar 72 can be installed in described keyway 601 by bolt, on retainingf key bar 71 and/or replacing key bar 72, are provided with some connecting holes; In order to reduce the stressed of bolt, extend the application life of bolt, between bolt and connecting hole, be provided with packing ring, and have gap between packing ring and connecting hole.
As shown in the above, dismountable retainingf key bar and replacing key bar of being provided with in the wheel hub that the present embodiment provides, retainingf key bar is different with replacing key bar thickness, therefore, only need be by the retainingf key cover of different-thickness being installed on hub body or being changed the counterpart that key bar can be applicable to sizes, for different operating modes, can switch fast the counterpart of different size, change simply, contribute to improve efficiency of construction.In addition, key bar is the most flimsy part, once it is damaged, only needs directly to change key bar, without changing whole wheel hub, contributes to shorten the time of changing parts, can reduce equipment cost in addition.
It should be noted that, the wheel hub that the present embodiment provides be take and is applied to rotary drilling rig as example, and the counterpart connecting with its key is drilling rod.It will be understood by those skilled in the art that this wheel hub also can be applied in other machinery that has key annexation, counterpart can be other parts accordingly.
The embodiment of the present invention four also provides a kind of rotary drilling rig, this rotary drilling rig is provided with above-mentioned any wheel hub, because above-mentioned any wheel hub has above-mentioned technique effect, therefore, the rotary drilling rig that is provided with this wheel hub can switch drilling rod when constructed in piles with different footpath fast, change simply, contribute to improve efficiency of construction.In addition, once the most flimsy part key bar is damaged, only need directly to change key bar, contribute to shorten the time of changing parts, reduce equipment cost.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a key cover, is characterized in that, comprising:
Key body (1), described key body (1) inwall is provided with keyway (101);
Key bar assembly, comprises some retainingf key bars (21) and changes key bar (22), described retainingf key bar (21) and replacing key bar (22) are installed in described keyway (101) along the axial dismountable of described key body (1); The thickness of described retainingf key bar (21) is less than the thickness of described replacing key bar (22);
On described key body (1), be provided with for described key bar assembly being carried out to the key bar seam of axial limiting.
2. key cover according to claim 1, is characterized in that, also comprises upper flange (31) and lower flange (32);
Described upper flange (31) is installed on the top of described key body (1), and described lower flange (32) is installed on the bottom of described key body (1); The internal diameter of described upper flange (31) and lower flange (32) and the external diameter of counterpart are suitable, and described counterpart is the parts that are connected with key cover key.
3. key cover according to claim 2, is characterized in that,
Described upper flange (31) compresses and contacts with the top of described replacing key bar (22), and the top of described replacing key bar (22) is provided with the top groove (221) suitable with described upper flange (31); And/or
Described lower flange (32) compresses and contacts with the bottom of described replacing key bar (22), and the bottom of described replacing key bar (22) is provided with the bottom groove (222) suitable with described lower flange (32).
4. according to the key cover described in claims 1 to 3 any one, it is characterized in that, described retainingf key bar (21) and/or replacing key bar (22) are installed in described keyway (101) by bolt (41), and described retainingf key bar (21) above and/or on replacing key bar (22) is provided with some connecting holes; And, between described bolt (41) and described connecting hole, be provided with packing ring (42), and have gap between described packing ring (42) and described connecting hole.
5. a wheel hub, comprises hub body and the key cover that is embedded in described hub body, it is characterized in that, described key cover is the key cover described in claim 1 to 4 any one.
6. a wheel hub, is characterized in that, comprising:
Hub body (6), described hub body (6) inwall is provided with keyway (601);
Key bar assembly, described key bar assembly comprises some retainingf key bars (71) and replacing key bar (72), described retainingf key bar (71) and replacing key bar (72) are installed in described keyway (601) along the axial dismountable of described hub body (6); The thickness of described retainingf key bar (71) is less than the thickness of described replacing key bar (72);
On described hub body (6), be provided with for described key bar assembly being carried out to the key bar seam of axial limiting.
7. wheel hub according to claim 6, is characterized in that, also comprises upper flange (81) and lower flange (82);
Described upper flange (81) is installed on the top of described hub body (6), and described lower flange (82) is installed on the bottom of described hub body (6); The internal diameter of described upper flange (81) and lower flange (82) and the external diameter of counterpart are suitable, and described counterpart is the parts that are connected with wheel hub key.
8. wheel hub according to claim 7, is characterized in that,
Described upper flange (81) compresses and contacts with the top of described replacing key bar (72), and the top of described replacing key bar (72) is provided with the top groove (721) suitable with described upper flange (81); And/or
Described lower flange (82) compresses and contacts with the bottom of described replacing key bar (72), and the bottom of described replacing key bar (72) is provided with the bottom groove (722) suitable with described lower flange (82).
9. according to the wheel hub described in claim 6 to 8 any one, it is characterized in that, described retainingf key bar (71) and/or replacing key bar (72) are installed in described keyway (601) by bolt, on described retainingf key bar (71) and/or replacing key bar (72), are provided with some connecting holes; And, between described bolt and described connecting hole, be provided with packing ring, and have gap between described packing ring and described connecting hole.
10. a rotary drilling rig, is characterized in that, is provided with the wheel hub described in claim 5 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310493550.7A CN103590755B (en) | 2013-10-21 | 2013-10-21 | Key cover, wheel hub and rotary drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310493550.7A CN103590755B (en) | 2013-10-21 | 2013-10-21 | Key cover, wheel hub and rotary drilling rig |
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| CN103590755A true CN103590755A (en) | 2014-02-19 |
| CN103590755B CN103590755B (en) | 2016-01-20 |
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| CN104481393A (en) * | 2014-12-12 | 2015-04-01 | 徐州徐工基础工程机械有限公司 | Power transmission structure of rotary drilling rig |
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| CN203188903U (en) * | 2013-04-03 | 2013-09-11 | 徐州徐工基础工程机械有限公司 | Combined type driving key with detachable rotary drilling rig power head |
| CN203201490U (en) * | 2013-04-26 | 2013-09-18 | 厦门厦工机械股份有限公司 | Improved rotary rolling rig power head drive sleeve |
| CN103277040A (en) * | 2013-05-28 | 2013-09-04 | 高邮市恒辉机械有限公司 | Power head used by rotary excavating drilling machine and long spiral drilling machine in common |
| CN203547570U (en) * | 2013-10-21 | 2014-04-16 | 北京市三一重机有限公司 | Key sleeve, hub and rotary drilling rig |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924916A (en) * | 2014-04-25 | 2014-07-16 | 山河智能装备股份有限公司 | Drilling machine combined type driving sleeve with movable key reliable to fix |
| CN103924916B (en) * | 2014-04-25 | 2016-08-24 | 山河智能装备股份有限公司 | Reliable rig combined drive set fixed by a kind of draw key |
| EP3135853A4 (en) * | 2014-04-25 | 2017-07-05 | Sunward Intelligent Equipment Co., Ltd. | Combined-type driving sleeve of drilling rig with reliably fixed draw key |
| CN104481393A (en) * | 2014-12-12 | 2015-04-01 | 徐州徐工基础工程机械有限公司 | Power transmission structure of rotary drilling rig |
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