CN211690512U - Reel device and excavator - Google Patents
Reel device and excavator Download PDFInfo
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- CN211690512U CN211690512U CN202020104289.2U CN202020104289U CN211690512U CN 211690512 U CN211690512 U CN 211690512U CN 202020104289 U CN202020104289 U CN 202020104289U CN 211690512 U CN211690512 U CN 211690512U
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Abstract
The utility model provides a reel device and excavator, it includes: a reel; the shaft assembly comprises a winding drum shaft, a first hub and a second hub, wherein the first hub and the second hub are respectively sleeved outside the winding drum shaft; the excavator includes a drum device. The utility model discloses a reel axle is connected with reel detachably through first wheel hub and second wheel hub, when maintaining or changing reel or reel axle, with first wheel hub and second wheel hub with the reel detach can, need not to adopt large-scale press, can not harm the hole and the reel axle of reel, be convenient for maintain or change reel and reel axle, maintain and change easy operation convenience, reduce the maintenance replacement cost.
Description
Technical Field
The utility model belongs to the technical field of the excavator technique and specifically relates to a reel device and excavator.
Background
The reel and the reel shaft of the lifting mechanism of the existing excavator adopt interference fit, when the reel or the reel shaft needs to be maintained or replaced, only a large-scale press can be adopted to detach and separate the reel and the reel shaft, the inner hole of the reel and the reel shaft are easily damaged, once the parts are scrapped due to damage, and therefore the difficulty in maintaining and replacing the reel and the reel shaft is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reel device and excavator to the reel that solves prior art existence and the big problem of the drum shaft maintenance change degree of difficulty.
To achieve the above object, the present invention provides a winding drum device, which includes: a reel; the shaft assembly comprises a winding drum shaft and a first hub and a second hub which are arranged outside the winding drum shaft in a sleeved mode respectively, the winding drum shaft is connected with the first hub and the second hub and can drive the first hub and the second hub to rotate, the winding drum shaft penetrates through the winding drum, and the first hub and the second hub are connected with the winding drum in a detachable mode respectively.
The reel apparatus as described above, wherein the shaft assembly further comprises a positioning assembly for positioning the first hub and the second hub in an axial direction of the reel shaft.
The winding drum device as described above, wherein the positioning assembly includes a positioning sleeve and an annular first boss, the positioning sleeve is used for positioning the first hub and the second hub in the axial direction of the winding drum shaft, the first boss is fixed on the outer wall of the winding drum shaft, the positioning sleeve is sleeved outside the winding drum shaft, the first boss, the first hub, the positioning sleeve and the second hub are sequentially arranged along the axial direction of the winding drum shaft, the first hub abuts against the first boss, the positioning sleeve abuts against the first hub, and the second hub abuts against the positioning sleeve.
The spool device as claimed in the above, wherein the positioning assembly includes an annular second boss for positioning the first boss and an annular third boss for positioning the second boss in the axial direction of the spool shaft, the second boss and the third boss are fixed on the outer wall of the spool shaft and located between the first boss and the second boss, the first boss abuts against the second boss, and the second boss abuts against the third boss.
The winding drum device as described above, wherein the first hub is in interference fit or keyed connection with the winding drum shaft, and the second hub is in interference fit or keyed connection with the winding drum shaft.
The spool device as claimed in the above, wherein the spool includes a spool body having a cylindrical shape, and a first flange plate and a second flange plate having an annular shape which are fixedly connected to the spool body, the first hub abuts against an end surface of the first flange plate and is detachably connected to the first flange plate, and the second hub abuts against an end surface of the second flange plate and is detachably connected to the second flange plate.
The spool device as claimed in the above, wherein the end surface of the first flange plate facing away from the second flange plate is a first outer end surface, the end surface of the second flange plate facing away from the first flange plate is a second outer end surface, the first hub abuts against the first outer end surface of the first flange plate, and the second hub abuts against the second outer end surface of the second flange plate.
The spool device as claimed in the above, wherein the end surface of the first flange plate facing the second flange plate is an inner end surface, the end surface of the second flange plate facing away from the first flange plate is a second outer end surface, the first hub abuts against the inner end surface of the first flange plate, the second hub abuts against the second outer end surface of the second flange plate, and the inner diameter of the second flange plate is smaller than the outer diameter of the second hub and larger than the outer diameter of the first hub.
The winding drum device as described above, wherein the first hub includes a first hub sleeve and a first hub flange fixed on an outer sidewall of the first hub sleeve, the first hub sleeve is fixedly sleeved outside the winding drum shaft and passes through the first flange disc, and the first hub flange abuts against an inner end surface of the first flange disc and is detachably connected with the first flange disc; the second wheel hub includes the second wheel hub cover and fixes second wheel hub flange on the lateral wall of second wheel hub cover, the fixed cover of second wheel hub cover is established outside the reel axle and wears to locate in the second flange dish, the second wheel hub flange supports and leans on the second terminal surface of second flange dish, and with second flange dish detachably connects, the internal diameter of second flange dish is less than the external diameter of second wheel hub flange just is greater than the external diameter of first wheel hub flange.
The utility model also provides an excavator, it includes foretell reel device.
The utility model discloses a characteristics and the advantage of reel device and excavator are: the utility model discloses a reel axle is connected with reel detachably through first wheel hub and second wheel hub, when maintaining or changing reel or reel axle, with first wheel hub and second wheel hub with the reel detach can, need not to adopt large-scale press, can not harm the hole and the reel axle of reel, be convenient for maintain or change reel and reel axle, maintain and change easy operation convenience, reduce the maintenance replacement cost.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1 is a schematic view of a first embodiment of a reel apparatus of the present invention;
FIG. 2 is a schematic view of the shaft assembly of FIG. 1;
FIG. 3 is a schematic view of a second embodiment of the reel apparatus of the present invention;
FIG. 4 is a schematic view of the shaft assembly of FIG. 3;
fig. 5 is a schematic view of a third embodiment of the reel apparatus of the present invention;
fig. 6 is a schematic view of the shaft assembly of fig. 5.
Main element number description:
1. a reel;
11. a spool body; 12. a first flange plate; 121. an inner end surface; 122. a first outer end face;
13. a second flange plate; 131. a second outer end face;
2. a shaft assembly;
21. a spool shaft; 22. a first hub; 221. a first hub sleeve; 222. a first hub flange;
23. a second hub; 231. a second hub sleeve; 232. a second hub flange;
24. a positioning sleeve; 25. a first boss; 26. a second boss; 27. a third boss;
3. a seal ring; 4. a first bolt; 5. and a second bolt.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. Where adjective or adverbial modifiers "center", "left" and "right", "top" and "bottom", "inner" and "outer" are used merely to facilitate relative reference between groups of terms, and do not describe any particular directional limitation on the modified terms. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of such features.
As shown in fig. 1, the present invention provides a winding drum device, which comprises a winding drum 1 and a shaft assembly 2, wherein the shaft assembly 2 comprises a winding drum shaft 21 and a first hub 22 and a second hub 23 respectively sleeved outside the winding drum shaft 21, the winding drum shaft 21 is connected with the first hub 22 and the second hub 23 and can drive the first hub 22 and the second hub 23 to rotate, the winding drum shaft 21 is disposed in the winding drum 1, the winding drum shaft 21 and the winding drum 1 are coaxially disposed, the first hub 22 and the second hub 23 are respectively detachably connected with the winding drum 1 and can drive the winding drum 1 to rotate, when the winding drum 1 or the winding drum shaft 21 is repaired or replaced, the first hub 22 and the second hub 23 are detached from the winding drum 1 to separate the winding drum 1 from the winding drum shaft 21, without using a large-scale press, the inner hole and the winding drum shaft of the winding drum are not damaged, the winding drum and the winding drum shaft are conveniently repaired or replaced, respectively, the maintenance and replacement operation is simple and convenient, and the maintenance and replacement cost is reduced. Further, first hub 22 is interference fit or keyed to spool shaft 21, and second hub 23 is interference fit or keyed to spool shaft 21. However, the present invention is not limited thereto, and the first hub 22 and the second hub 23 can also be connected to the spool 21 through other existing connection methods, as long as the first hub 22 and the second hub 23 can rotate along with the spool 21.
As shown in fig. 1, further, the first hub 22 and the second hub 23 are provided at an interval in the axial direction of the spool shaft 21 to stably support the spool shaft 21.
As shown in fig. 1, further, a first hub 22 and a second hub 23 are detachably coupled to both ends of the reel 1, respectively, to stably support the reel 1.
In one embodiment, shaft assembly 2 further includes a positioning assembly for positioning first hub 22 and second hub 23 in the axial direction of mandrel shaft 21 to define the axial positions of first hub 22 and second hub 23 on mandrel shaft 21 by the positioning assembly when assembled, ensuring the accuracy of the axial mounting of first hub 22 and second hub 23 on mandrel shaft 21.
As shown in fig. 1 and 2, in the first embodiment, the positioning assembly includes a positioning sleeve 24 and an annular first boss 25, the positioning sleeve 24 is used for positioning the first hub 22 and the second hub 23 in the axial direction of the mandrel shaft 21, the first boss 25 is fixed on the outer wall of the mandrel shaft 21, for example, the first boss 25 and the mandrel shaft 21 are of an integral structure, the positioning sleeve 24 is sleeved outside the mandrel shaft 21, the first boss 25, the first hub 22, the positioning sleeve 24 and the second hub 23 are sequentially arranged along the axial direction of the mandrel shaft 21, the first hub 22 abuts against the first boss 25, the positioning sleeve 24 abuts against the first hub 22, the second hub 23 abuts against the positioning sleeve 24, or two ends of the first hub 22 respectively abut against the first boss 25 and the positioning sleeve 24, and two ends of the positioning sleeve 24 respectively abut against the first hub 22 and the second hub 23.
The present embodiment axially positions the first hub 22 and the second hub 23 by providing the positioning sleeve 24 and the first boss 25, thereby ensuring the axial mounting accuracy of the first hub 22 and the second hub 23 on the spool shaft 21.
Further, the positioning sleeve 24 is clearance fitted to the spool shaft 21 to facilitate mounting of the positioning sleeve 24 to the spool shaft 21.
As shown in fig. 3 and 4, in the second embodiment, the positioning assembly includes an annular second boss 26 for positioning the first boss 22 in the axial direction of the mandrel shaft 21, and an annular third boss 27 for positioning the second boss 23 in the axial direction of the mandrel shaft 21, the second boss 26 and the third boss 27 are fixed on the outer wall of the mandrel shaft 21 and located between the first boss 22 and the second boss 23, the first boss 22 abuts against the second boss 26, and the second boss 23 abuts against the third boss 27, for example, the second boss 26 and the third boss 27 are of an integral structure with the mandrel shaft 21.
The present embodiment secures the accuracy of the axial mounting of the first hub 22 and the second hub 23 on the spool shaft 21 by providing the second boss 26 and the third boss 27 to axially position the first hub 22 and the second hub 23, respectively.
As shown in fig. 1 and 3, in one embodiment, the spool 1 includes a spool body 11 having a cylindrical shape, and a first flange plate 12 and a second flange plate 13 having an annular shape fixedly connected to the spool body 11, the first flange plate 12 and the second flange plate 13 being spaced apart in an axial direction of the spool body 11 and corresponding to a first hub 22 and a second hub 23, respectively, the first flange plate 12 and the second flange plate 13 being provided along a radial direction of the spool body 11 so as to be connected to the shaft assembly 2 inside the spool body 11, the first hub 22 abutting against an end surface of the first flange plate 12 and being detachably connected to the first flange plate 12, and the second hub 23 abutting against an end surface of the second flange plate 13 and being detachably connected to the second flange plate 13.
As shown in fig. 1 and 3, in the first embodiment, an end surface of the first flange plate 12 facing one end of the second flange plate 13 is an inner end surface 121, an end surface of the second flange plate 13 facing away from one end of the first flange plate 12 is a second outer end surface 131, the first hub 22 abuts against the inner end surface 121 of the first flange plate 12, the second hub 23 abuts against the second outer end surface 131 of the second flange plate 13, and an inner diameter of the second flange plate 13 is smaller than an outer diameter of the second hub 23 and larger than an outer diameter of the first hub 22, so that the first hub 22 can pass through an inner hole of the second flange plate 13, and when the positioning sleeve 24 is used, the outer diameter of the positioning sleeve 24 is smaller than the inner diameter of the second flange plate 13, so that the positioning sleeve can pass through the inner hole of the second flange plate 13. In this embodiment, the first hub 22 may also be referred to as an inner hub, and the second hub 23 may also be referred to as an outer hub.
In this embodiment, the positioning assembly may employ the positioning sleeve 24 and the first boss 25, or the second boss 26 and the third boss 27.
In this embodiment, the first hub 22 and the spool shaft 21 may be in an interference fit or a key connection, and the second hub 23 and the spool shaft 21 may be in an interference fit or a key connection. Because the first hub 22 needs to abut against the inner end surface 121 of the first flange 12, when the shaft assembly 2 and the reel 1 are assembled, the first hub 22 is firstly sleeved on the reel shaft 21, then the reel shaft 21 carrying the first hub 22 is inserted into the reel 1 from the side of the reel 1 provided with the second flange 13 until the first hub 22 abuts against the inner end surface 121 of the first flange 12, and the second hub 23 can be inserted into the reel 1 along with the reel shaft 21, or after the reel shaft 21 is inserted into the reel 1, the second hub 23 is sleeved outside the reel shaft 21, and then the second hub 23 is connected with the second flange 13.
For example, when the first hub 22 and the second hub 23 are connected to the mandrel shaft 21 by interference fit, the method for assembling the shaft assembly 2 and the mandrel 1 is: firstly, sleeving a first hub 22 and a second hub 23 outside a winding drum shaft 21, then inserting a shaft assembly 2 into the winding drum 1 from the side of the winding drum 1 provided with a second flange disc 13 along the axial direction of the winding drum 1, enabling the first hub 22 and a positioning sleeve 24 of the shaft assembly 2 to sequentially pass through the second flange disc 13 and move towards the first flange disc 12, enabling the second hub 23 to just abut against a second outer end surface 131 of the second flange disc 13 when the first hub 22 moves to abut against an inner end surface 121 of the first flange disc 12, then connecting the first hub 22 with the first flange disc 12, and connecting the second hub 23 with the second flange disc 13, so that the assembly of the winding drum 1 and the shaft assembly 2 is completed; when the shaft assembly is disassembled, the first hub 22 and the first flange plate 12 and the second hub 23 and the second flange plate 13 are connected and disassembled, and then the shaft assembly 2 is pulled out from the winding drum 1, so that the disassembling and assembling operation is simple and convenient.
As shown in fig. 1 and 3, in the present embodiment, further, the first hub 22 includes a first hub sleeve 221 and a first hub flange 222 fixed on an outer side wall of the first hub sleeve 221, the first hub sleeve 221 is fixedly sleeved outside the spool shaft 21 and is inserted into the inner hole of the first flange plate 12, and the first hub flange 222 abuts against the inner end surface 121 of the first flange plate 12 and is detachably connected to the first flange plate 12; the second hub 23 includes a second hub sleeve 231 and a second hub flange 232 fixed on the outer sidewall of the second hub sleeve 231, the second hub sleeve 231 is fixedly sleeved outside the spool shaft 21 and penetrates through the inner hole of the second flange disc 13, the second hub flange 232 abuts against the second outer end surface 131 of the second flange disc 13 and is detachably connected with the second flange disc 13, the distance between the first hub flange 222 and the second hub flange 232 is equal to the distance between the first flange disc 12 and the second flange disc 13, and the inner diameter of the second flange disc 13 is smaller than the outer diameter of the second hub flange 232 and larger than the outer diameter of the first hub flange 222, so that the first hub flange 222 can pass through the inner hole of the second flange disc 13.
As shown in fig. 1 and 3, specifically, the first hub sleeve 221 is cylindrical, the first hub sleeve 221 is in interference fit with the spool shaft 21, the first hub flange 222 is an annular flange, and the first hub flange 222 and the first hub sleeve 221 are of an integrated structure or a split structure fixedly connected by welding; the second hub sleeve 231 is cylindrical, the second hub sleeve 231 is in interference fit with the drum shaft 21, the second hub flange 232 is an annular flange, and the second hub flange 232 and the second hub sleeve 231 are of an integrated structure or a split structure fixedly connected through a welding mode.
As shown in fig. 5 and 6, in the second specific embodiment, the end surface of the first flange plate 12 facing away from (i.e., facing away from) the second flange plate 13 is a first outer end surface 122, the end surface of the second flange plate 13 facing away from the first flange plate 12 is a second outer end surface 131, the first hub 22 abuts against the first outer end surface 122 of the first flange plate 12, and the second hub 23 abuts against the second outer end surface 131 of the second flange plate 13.
As shown in fig. 5 and 6, in the present embodiment, the positioning assembly employs the aforementioned second boss 26 and third boss 27.
In this embodiment, in order to facilitate the assembly of the shaft assembly 2 and the reel 1, it is preferable that at least one of the first hub 22 and the second hub 23 is keyed to the reel shaft 21, and in the assembly, after the reel shaft 21 is inserted into the reel 1, the first hub 22 or/and the second hub 23 keyed to the reel shaft 21 is fitted over the reel shaft 21 and then connected to the corresponding flange.
As shown in fig. 1 and 3, in one embodiment, the first flange plate 12 and the second flange plate 13 are respectively fixed at two axial ends of the reel body 11, so as to connect two ends of the reel 1 with a first hub 22 and a second hub 23 of the shaft assembly 2, respectively, so that the shaft assembly 2 stably supports the reel 1. For example, the first flange 12 is located inside the spool body 11, and the outer periphery of the first flange 12 is welded to the inner side wall of the spool body 11, the second flange 13 is fixed to the end surface of the spool body 11, and the end surface of the second flange 13 is welded to the end surface of the spool body 11.
As shown in fig. 1 and 3, in one embodiment, at least one of the first hub 22 and the second hub 23 is sealingly connected to the spool 1.
For example, one end of the spool shaft 21, on which the second hub 23 is mounted, is connected to the reducer of the hoisting mechanism, the second hub 23 is connected to the spool 1 in a sealing manner, specifically, a space between the second hub flange 232 of the second hub 23 and the second flange 13 is sealed by the sealing ring 3, so as to prevent oil leakage of the reducer of the hoisting mechanism from entering the spool 1 from a space between the second hub 23 and the spool 1; alternatively, the end of the spool shaft 21 to which the first hub 22 is attached is connected to a reducer of the hoisting mechanism, and the first hub 22 is hermetically connected to the spool 1, that is, the first hub flange 222 of the first hub 22 and the first flange plate 12 are sealed by a seal ring.
As shown in fig. 1 and 3, in one embodiment, the first hub 22 and the first flange 12 are coupled by a plurality of first bolts 4, the plurality of first bolts 4 are spaced apart in a circumferential direction of the first hub 22 to securely couple the first hub 22 and the first flange 12, the second hub 23 and the second flange 13 are coupled by a plurality of second bolts 5, and the plurality of second bolts 5 are spaced apart in a circumferential direction of the second hub 23 to securely couple the second hub 23 and the second flange 13.
Specifically, as shown in fig. 1 and 3, the first hub flange 222 of the first hub 22 and the first flange plate 12 are connected by a plurality of first bolts 4, and the second hub flange 232 of the second hub 23 and the second flange plate 13 are connected by a plurality of second bolts 5.
The utility model also provides an excavator, it includes hoist mechanism, and hoist mechanism includes foretell reel device. For example, the excavator is a large mining excavator.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention. Moreover, it should be noted that the components of the present invention are not limited to the above-mentioned integral application, and various technical features described in the present invention can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention of the present invention.
Claims (10)
1. A spool apparatus, characterized in that the spool apparatus comprises:
a reel;
the shaft assembly comprises a winding drum shaft and a first hub and a second hub which are arranged outside the winding drum shaft in a sleeved mode respectively, the winding drum shaft is connected with the first hub and the second hub and can drive the first hub and the second hub to rotate, the winding drum shaft penetrates through the winding drum, and the first hub and the second hub are connected with the winding drum in a detachable mode respectively.
2. The spool apparatus of claim 1, wherein the shaft assembly further comprises a positioning assembly for positioning the first hub and the second hub in an axial direction of the spool shaft.
3. The spool apparatus as claimed in claim 2, wherein the positioning assembly includes a positioning sleeve for positioning the first hub and the second hub in an axial direction of the spool shaft, and an annular first boss fixed on an outer wall of the spool shaft, the positioning sleeve being disposed outside the spool shaft, the first boss, the first hub, the positioning sleeve, and the second hub being sequentially arranged in the axial direction of the spool shaft, the first hub abutting against the first boss, the positioning sleeve abutting against the first hub, and the second hub abutting against the positioning sleeve.
4. The spool assembly as claimed in claim 2, wherein said positioning assembly includes an annular second boss for positioning said first boss and an annular third boss for positioning said second boss in an axial direction of said spool shaft, said second boss and said third boss being fixed to an outer wall of said spool shaft and located between said first boss and said second boss, said first boss abutting said second boss, said second boss abutting said third boss.
5. The spool assembly as claimed in claim 1, wherein said first hub is an interference fit or keyed connection to said spool shaft and said second hub is an interference fit or keyed connection to said spool shaft.
6. The spool apparatus as claimed in claim 1, wherein the spool includes a spool body having a cylindrical shape, and a first flange plate and a second flange plate having an annular shape fixedly attached to the spool body, the first hub abutting an end surface of the first flange plate and being detachably attached to the first flange plate, and the second hub abutting an end surface of the second flange plate and being detachably attached to the second flange plate.
7. The spool apparatus of claim 6, wherein the end of the first flanged disk facing away from the second flanged disk is a first outer end face, the end of the second flanged disk facing away from the first flanged disk is a second outer end face, the first hub abuts the first outer end face of the first flanged disk, and the second hub abuts the second outer end face of the second flanged disk.
8. The spool assembly of claim 6, wherein the end surface of the first flange plate facing the second flange plate is an inner end surface, the end surface of the second flange plate facing away from the first flange plate is a second outer end surface, the first hub abuts the inner end surface of the first flange plate, the second hub abuts the second outer end surface of the second flange plate, and the inner diameter of the second flange plate is less than the outer diameter of the second hub and greater than the outer diameter of the first hub.
9. The reel device as claimed in claim 8, wherein the first hub comprises a first hub sleeve and a first hub flange fixed on an outer sidewall of the first hub sleeve, the first hub sleeve is fixedly sleeved outside the reel shaft and is inserted into the first flange plate, and the first hub flange abuts against an inner end surface of the first flange plate and is detachably connected with the first flange plate;
the second wheel hub includes the second wheel hub cover and fixes second wheel hub flange on the lateral wall of second wheel hub cover, the fixed cover of second wheel hub cover is established outside the reel axle and wears to locate in the second flange dish, the second wheel hub flange supports and leans on the second terminal surface of second flange dish, and with second flange dish detachably connects, the internal diameter of second flange dish is less than the external diameter of second wheel hub flange just is greater than the external diameter of first wheel hub flange.
10. An excavator, characterized in that the excavator comprises a drum device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020104289.2U CN211690512U (en) | 2020-01-17 | 2020-01-17 | Reel device and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020104289.2U CN211690512U (en) | 2020-01-17 | 2020-01-17 | Reel device and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211690512U true CN211690512U (en) | 2020-10-16 |
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ID=72772764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020104289.2U Active CN211690512U (en) | 2020-01-17 | 2020-01-17 | Reel device and excavator |
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| Country | Link |
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| CN (1) | CN211690512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591640A (en) * | 2020-12-10 | 2021-04-02 | 中油国家油气钻井装备工程技术研究中心有限公司 | Oil-well rig winch drum suitable for many bores at bottom |
-
2020
- 2020-01-17 CN CN202020104289.2U patent/CN211690512U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591640A (en) * | 2020-12-10 | 2021-04-02 | 中油国家油气钻井装备工程技术研究中心有限公司 | Oil-well rig winch drum suitable for many bores at bottom |
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