CN216519315U - Brake auxiliary mechanism of belt type oil pumping unit - Google Patents
Brake auxiliary mechanism of belt type oil pumping unit Download PDFInfo
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- CN216519315U CN216519315U CN202122314635.7U CN202122314635U CN216519315U CN 216519315 U CN216519315 U CN 216519315U CN 202122314635 U CN202122314635 U CN 202122314635U CN 216519315 U CN216519315 U CN 216519315U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 8
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- 230000000295 complement effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
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- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a brake auxiliary mechanism of a belt type pumping unit, which comprises a driving motor, a driving gear, a rack mechanism, a fixed plate and a driven gear in transmission connection with a rotating shaft of a brake handle of the brake mechanism of the belt type pumping unit, wherein the driving motor and the fixed plate are fixedly arranged on the belt type pumping unit, and the driving gear is fixedly connected with an output shaft of the driving motor; the rack mechanism comprises a combined rack, a first movable single tooth, a second movable single tooth, a first screw and a second screw; the combined rack comprises a first rack, a second rack and a sliding plate; the driving gear is meshed with the first rack, the first movable single tooth or the second movable single tooth, and the driven gear is meshed with the second rack. The brake auxiliary mechanism of the belt type pumping unit realizes the electric control of the brake mechanism on the belt type pumping unit.
Description
Technical Field
The utility model relates to the technical field of pumping unit brake equipment, in particular to a brake auxiliary mechanism of a belt type pumping unit.
Background
At present, oil extraction equipment mainly comprises a beam pumping unit and a tower pumping unit. Among them, the belt type pumping unit is the most common one of the tower type pumping units, has the characteristics of large stroke, high efficiency, stability, reliability and the like, and is widely applied to various large oil fields.
All be provided with brake mechanism on the belt formula beam-pumping unit, current brake mechanism need artificial swing brake handle, just can trigger brake mechanism and make brake mechanism locking or unblock, but belt formula beam-pumping unit sets up at the oil field scene, makes the workman go the brake handle of on-the-spot swing brake mechanism to make brake mechanism locking or unblock not only waste time and energy, inefficiency, when the oil field scene is dangerous, workman's personal safety also can not effectively be ensured moreover.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a brake auxiliary mechanism of a belt type pumping unit, which aims to solve the problems in the prior art and realize electric control on the brake mechanism of the belt type pumping unit.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides a brake auxiliary mechanism of a belt type pumping unit, which comprises a driving motor, a driving gear, a rack mechanism, a fixed plate and a driven gear in transmission connection with a rotating shaft of a brake handle of the brake mechanism of the belt type pumping unit, wherein the driving motor and the fixed plate are fixedly arranged on the belt type pumping unit, and the driving gear is fixedly connected with an output shaft of the driving motor; the rack mechanism comprises a combined rack, a first movable single tooth, a second movable single tooth, a first screw and a second screw; the combined rack comprises a first rack, a second rack and a sliding plate, the sliding plate is in sliding fit with a groove arranged in the fixed plate, the first rack and the second rack are fixedly connected with the sliding plate respectively, and a gap is formed between the first rack and the second rack; two sides of one end, close to the second rack, of the first rack are fixedly provided with a first positioning plate respectively, two sides of one end, close to the first rack, of the second rack are fixedly provided with a second positioning plate respectively, one first positioning plate and one second positioning plate are fixedly connected with the first screw respectively, the other first positioning plate and the other second positioning plate are fixedly connected with the second screw respectively, the first screw and the second screw are fixedly connected with a third positioning plate respectively, the first rack is positioned between the third positioning plate and the second rack, and a gap is formed between the third positioning plate and the first rack; the first movable single tooth is positioned between the third positioning plate and the first rack, the second movable single tooth is positioned between the second positioning plate and the first rack, the first movable single tooth and the second movable single tooth are both slidably sleeved on the first screw rod and the second screw rod, the first screw rod and the second screw rod are both sleeved with a first spring and a second spring, one end of the first spring is fixedly connected with the third positioning plate, the other end of the first spring is fixedly connected with the first movable single tooth, one end of the second spring is fixedly connected with the second positioning plate, and the other end of the second spring is fixedly connected with the second movable single tooth; the driving gear is meshed with the first rack, the first movable single tooth or the second movable single tooth, and the driven gear is meshed with the second rack.
Preferably, one end of the rotating shaft is fixedly connected with a connecting shaft coaxial with the rotating shaft, the diameter of the connecting shaft is smaller than that of the rotating shaft, the driven gear is rotatably sleeved on the connecting shaft, and an interval is formed between the connecting shaft and the rotating shaft; the pivot is close to driven gear's one end is provided with the external splines, the pivot pass through the internal splines sleeve with driven gear transmission is connected, the external splines with driven gear can simultaneously with the internal splines muffjoint.
Preferably, the rotating shaft is fixedly provided with a rotating disc coaxial with the rotating shaft, one side of the rotating disc close to the driven gear is fixedly provided with a first connecting plate, the first connecting plate is hinged to one end of a movable plate, a second connecting plate is fixedly arranged on an internal spline sleeve, a first pin hole is fixedly arranged on the second connecting plate, the first connecting plate corresponds to the first pin hole, a second pin hole is formed in the first pin hole, a third pin hole is formed in the movable plate, and the first connecting plate and the movable plate can be fixedly connected with the second connecting plate through pin shafts.
Preferably, the first connecting plate comprises two sub-connecting plates arranged side by side, a space is formed between the two sub-connecting plates, and the movable plate is located between the two sub-connecting plates.
Preferably, the length of the movable plate is greater than the length of the first connecting plate.
Preferably, the first screw rod and the second screw rod are connected with a first nut and a second nut in a threaded manner, the first nut is located between the first positioning plate and the first movable single tooth and is in close contact with the first positioning plate, the second nut is located on one side, away from the second movable single tooth, of the second positioning plate and is in close contact with the second positioning plate.
Preferably, the fixed plate is horizontal, the groove is a T-shaped groove, the fixed plate is fixedly connected with the vertical plate through a first L-shaped connecting plate, and the vertical plate is fixedly connected with the belt type pumping unit through a second L-shaped connecting plate.
Preferably, a first limiting rod facing the first movable single tooth is arranged on the third positioning plate, and a second limiting rod facing the second movable single tooth is fixedly arranged on the side wall of the second rack.
Compared with the prior art, the utility model has the following technical effects:
the brake auxiliary mechanism of the belt type pumping unit realizes the electric control of the brake mechanism on the belt type pumping unit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a brake auxiliary mechanism of the belt-type pumping unit according to the present invention;
FIG. 2 is a schematic view of a part of the brake auxiliary mechanism of the belt-type pumping unit according to the present invention;
FIG. 3 is a schematic structural diagram of a combined rack in the brake assist mechanism of the belt-type pumping unit according to the present invention;
FIG. 4 is an exploded view of a portion of the brake assist mechanism of the belt-type pumping unit of the present invention;
wherein: 100. a brake auxiliary mechanism of the belt type pumping unit; 1. a rotating shaft; 2. a pull rod ear plate; 3. an inner spline sleeve; 4. a driven gear; 5. a driving gear; 6. a fixing plate; 7. rotating the disc; 8. a movable plate; 9. a first connecting plate; 10. a second connecting plate; 11. a first rack; 12. a second rack; 13. a first movable single tooth; 14. a second movable single tooth; 15. a first screw; 16. a second screw; 17. a first positioning plate; 18. a second positioning plate; 19. a third positioning plate; 20. a first spring; 21. a second spring; 22. a first nut; 23. a second nut; 24. a first L-shaped connecting plate; 25. a vertical plate; 26. a second L-shaped connecting plate; 27. a slide plate; 28. an external spline; 29. and (7) connecting the shafts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The utility model aims to provide a brake auxiliary mechanism of a belt type pumping unit, which aims to solve the problems in the prior art and realize electric control on the brake mechanism of the belt type pumping unit.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 4: the embodiment provides a brake auxiliary mechanism 100 of a belt type pumping unit, which comprises a driving motor, a driving gear 5, a rack mechanism, a fixed plate 6 and a driven gear 4 in transmission connection with a rotating shaft 1 of a brake handle of the brake mechanism of the belt type pumping unit, wherein the driving motor and the fixed plate 6 are fixedly arranged on the belt type pumping unit, and the driving gear 5 is fixedly connected with an output shaft of the driving motor; the driving gear 5 is in transmission connection with the driven gear 4 through a rack mechanism.
The rack mechanism comprises a combined rack, a first movable single tooth 13, a second movable single tooth 14, a first screw 15 and a second screw 16; the combined rack comprises a first rack 11, a second rack 12 and a sliding plate 27, the sliding plate 27 is in sliding fit with a groove arranged in the fixed plate 6, the groove is a T-shaped groove, the shape of the sliding plate 27 is matched with that of the groove, the first rack 11 and the second rack 12 are fixedly connected with the sliding plate 27 respectively, and a gap is formed between the first rack 11 and the second rack 12; two sides of one end of the first rack 11, which is close to the second rack 12, are fixedly provided with a first positioning plate 17, two sides of one end of the second rack 12, which is close to the first rack 11, are fixedly provided with a second positioning plate 18, one first positioning plate 17 and one second positioning plate 18 are fixedly connected with a first screw 15, the other first positioning plate 17 and the other second positioning plate 18 are fixedly connected with a second screw 16, the first screw 15 and the second screw 16 are fixedly connected with a third positioning plate 19, the first rack 11 is positioned between the third positioning plate 19 and the second rack 12, and a gap is formed between the third positioning plate 19 and the first rack 11; the first movable single tooth 13 is positioned between the third positioning plate 19 and the first rack 11, the second movable single tooth 14 is positioned between the second positioning plate 18 and the first rack 11, the first movable single tooth 13 and the second movable single tooth 14 are both slidably sleeved on the first screw 15 and the second screw 16, the first screw 15 and the second screw 16 are both sleeved with a first spring 20 and a second spring 21, one end of the first spring 20 is fixedly connected with the third positioning plate 19, the other end of the first spring is fixedly connected with the first movable single tooth 13, one end of the second spring 21 is fixedly connected with the second positioning plate 18, and the other end of the second spring is fixedly connected with the second movable single tooth 14; the driving gear 5 is meshed with the first rack 11, the first movable single tooth 13 or the second movable single tooth 14, and the driven gear 4 is meshed with the second rack 12.
One end of the rotating shaft 1 is fixedly connected with a connecting shaft 29 coaxial with the rotating shaft 1, the diameter of the connecting shaft 29 is smaller than that of the rotating shaft 1, the driven gear 4 is rotatably sleeved on the connecting shaft 29, and a space is formed between the connecting shaft 29 and the rotating shaft 1; the one end that pivot 1 is close to driven gear 4 is provided with external splines 28, and pivot 1 is connected with driven gear 4 transmission through internal splines sleeve 3, and external splines 28 and driven gear 4 can mesh with internal splines sleeve 3 simultaneously.
The rotating disc 7 coaxial with the rotating shaft 1 is fixedly arranged on the rotating shaft 1, a first connecting plate 9 is fixedly arranged on one side, close to the driven gear 4, of the rotating disc 7, the first connecting plate 9 is hinged to one end of the movable plate 8, a second connecting plate 10 is fixedly arranged on the internal spline sleeve 3, a first pin hole is fixedly arranged on the second connecting plate 10, the first connecting plate 9 is provided with a second pin hole corresponding to the first pin hole, a third pin hole corresponding to the first pin hole is formed in the movable plate 8, and the first connecting plate 9 and the movable plate 8 can be fixedly connected with the second connecting plate 10 through pin shafts. In the present embodiment, the first connecting plate 9 includes two sub-connecting plates arranged side by side with a space therebetween, and the movable plate 8 is located between the two sub-connecting plates. The length of the movable plate 8 is greater than that of the first connecting plate 9.
The first screw 15 and the second screw 16 are both in threaded connection with a first nut 22 and a second nut 23, the first nut 22 is located between the first positioning plate 17 and the first movable single tooth 13, the first nut 22 is in close contact with the first positioning plate 17, the second nut 23 is located on one side, away from the second movable single tooth 14, of the second positioning plate 18, and the second nut 23 is in close contact with the second positioning plate 18.
The fixed plate 6 is horizontal, the fixed plate 6 is fixedly connected with the vertical plate 25 through the first L-shaped connecting plate 24, and the vertical plate 25 is fixedly connected with the belt type pumping unit through the second L-shaped connecting plate 26.
The specific working process of the brake assisting mechanism 100 of the belt-type pumping unit of the embodiment is as follows:
firstly, when the brake mechanism needs to be locked, the external spline 28 and the driven gear 4 need to be simultaneously meshed with the internal spline sleeve 3, namely, the internal spline sleeve 3 is simultaneously sleeved on the external spline 28 and the driven gear 4, and the movable plate 8 is rotated, so that the movable plate 8 is fixedly connected with the second connecting plate 10 through the pin shaft; then, the driving motor is turned on, the driving motor drives the driving gear 5 to rotate, based on the view angle of fig. 2, the driving gear 5 first drives the second movable single tooth 14 to slide rightwards, and simultaneously drives the combined rack to slide rightwards along the groove through the second movable single tooth 14 and the second spring 21, during the process that the combined rack slides rightwards along the groove, the first rack 11 is meshed with the driving gear 5, the driving gear 5 drives the first rack 11 to slide rightwards, the first rack 11 drives the second rack 12 to slide rightwards through the sliding plate 27, the second rack 12 drives the driven gear 4 to rotate, the driven gear 4 drives the rotating shaft 1 to rotate through the internal spline sleeve 3, after the first rack 11 is separated from the driving gear 5, the driving gear 5 is meshed with the first movable single tooth 13, although the driving gear 5 rotates all the time, due to the existence of the first spring 20, and no rack on the left side of the first movable single tooth 13 is meshed with the driving gear 5 again, the driving gear 5 can stir the first movable single tooth 13 to move rightwards at the moment, meanwhile, the first movable single tooth 13 moves leftwards under the tension of the first spring 20 after being separated from the driving gear 5 and is meshed with the driving gear 5 again, the operation is repeated continuously, the first movable single tooth 13 shakes constantly under the action of the driving gear 5 and the first spring 20, the operation can be achieved by adjusting the length of the first rack 11 and the length of the second rack 12, the driving motor rotates constantly, but finally the rotating shaft 1 and the pull rod ear plate 2 only rotate by a fixed angle, the pull rod ear plate 2 rotates by a fixed angle and then triggers the brake mechanism, and therefore the brake mechanism is locked.
Secondly, when the brake mechanism needs to be unlocked, the driving motor is made to rotate reversely, the driving motor drives the driving gear 5 to rotate reversely, based on the view angle of fig. 2, the driving gear 5 firstly drives the first movable single tooth 13 to slide leftwards, meanwhile, the first movable single tooth 13 and the first spring 20 drive the combined rack to slide leftwards along the groove, in the process that the combined rack slides leftwards along the groove, the first rack 11 is meshed with the driving gear 5, the driving gear 5 drives the first rack 11 to slide leftwards, the first rack 11 drives the second rack 12 to slide leftwards through the sliding plate 27, the second rack 12 drives the driven gear 4 to rotate, the driven gear 4 drives the rotating shaft 1 to rotate through the internal spline sleeve 3, after the first rack 11 is separated from the driving gear 5, the driving gear 5 is meshed with the second movable single tooth 14, although the driving gear 5 rotates all the time, due to the existence of the second spring 21, and no rack is arranged on the right side of the second movable single tooth 14 and is meshed with the driving gear 5, the driving gear 5 can shift the second movable single tooth 14 to move leftwards, meanwhile, the second movable single tooth 14 moves rightwards under the tension of the second spring 21 after being separated from the driving gear 5 and is meshed with the driving gear 5 again, the reciprocating motion is continuous, the second movable single tooth 14 shakes constantly under the action of the driving gear 5 and the second spring 21, the driving motor rotates constantly but finally the rotating shaft 1 and the pull rod lug plate 2 rotate reversely for a fixed angle through adjusting the length of the first rack 11 and the length of the second rack 12, and the brake mechanism is unlocked after the pull rod lug plate 2 rotates reversely for a fixed angle, so that the brake mechanism is locked.
Therefore, the remote control of the brake mechanism on the belt type pumping unit can be realized by remotely controlling the opening and closing of the driving motor.
Example two
The present embodiment provides a brake assisting mechanism 100 of a belt-type pumping unit, and the brake assisting mechanism 100 of the belt-type pumping unit of the present embodiment is basically the same as the brake assisting mechanism 100 of the belt-type pumping unit provided in the first embodiment in structure, except that: in the brake auxiliary mechanism 100 of the belt-type pumping unit of this embodiment, a first limit rod facing the first movable single tooth 13 is disposed on the third positioning plate 19, and a second limit rod facing the second movable single tooth 14 is fixedly disposed on the side wall of the second rack 12; the first limiting rod is used for preventing the interval between the first movable single tooth 13 and the first rack 11 from being too large, and the second limiting rod is used for preventing the interval between the second movable single tooth 14 and the first rack 11 from being too large.
In the description of the present invention, it should be noted that the terms "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (8)
1. The utility model provides a brake complementary unit of belt pumping unit which characterized in that: the belt type pumping unit comprises a driving motor, a driving gear, a rack mechanism, a fixed plate and a driven gear in transmission connection with a rotating shaft of a brake handle of a brake mechanism of the belt type pumping unit, wherein the driving motor and the fixed plate are fixedly arranged on the belt type pumping unit, and the driving gear is fixedly connected with an output shaft of the driving motor; the rack mechanism comprises a combined rack, a first movable single tooth, a second movable single tooth, a first screw and a second screw; the combined rack comprises a first rack, a second rack and a sliding plate, the sliding plate is in sliding fit with a groove arranged in the fixed plate, the first rack and the second rack are fixedly connected with the sliding plate respectively, and a gap is formed between the first rack and the second rack; two sides of one end, close to the second rack, of the first rack are fixedly provided with a first positioning plate respectively, two sides of one end, close to the first rack, of the second rack are fixedly provided with a second positioning plate respectively, one first positioning plate and one second positioning plate are fixedly connected with the first screw respectively, the other first positioning plate and the other second positioning plate are fixedly connected with the second screw respectively, the first screw and the second screw are fixedly connected with a third positioning plate respectively, the first rack is positioned between the third positioning plate and the second rack, and a gap is formed between the third positioning plate and the first rack; the first movable single tooth is positioned between the third positioning plate and the first rack, the second movable single tooth is positioned between the second positioning plate and the first rack, the first movable single tooth and the second movable single tooth are both slidably sleeved on the first screw rod and the second screw rod, the first screw rod and the second screw rod are both sleeved with a first spring and a second spring, one end of the first spring is fixedly connected with the third positioning plate, the other end of the first spring is fixedly connected with the first movable single tooth, one end of the second spring is fixedly connected with the second positioning plate, and the other end of the second spring is fixedly connected with the second movable single tooth; the driving gear is meshed with the first rack, the first movable single tooth or the second movable single tooth, and the driven gear is meshed with the second rack.
2. The brake assist mechanism of the belt-type pumping unit according to claim 1, characterized in that: one end of the rotating shaft is fixedly connected with a connecting shaft coaxial with the rotating shaft, the diameter of the connecting shaft is smaller than that of the rotating shaft, the driven gear is rotatably sleeved on the connecting shaft, and an interval is formed between the connecting shaft and the rotating shaft; the pivot is close to driven gear's one end is provided with the external splines, the pivot pass through the internal splines sleeve with driven gear transmission is connected, the external splines with driven gear can simultaneously with the internal splines muffjoint.
3. The brake assist mechanism of the belt-type pumping unit according to claim 2, characterized in that: the novel gear box is characterized in that a rotating disc coaxial with the rotating shaft is fixedly arranged on the rotating shaft, a first connecting plate is fixedly arranged on one side, close to the driven gear, of the rotating disc, the first connecting plate is hinged to one end of a movable plate, a second connecting plate is fixedly arranged on an inner spline sleeve, a first pin hole is fixedly arranged on the second connecting plate, the first connecting plate corresponds to the first pin hole and is provided with a second pin hole, the movable plate corresponds to the first pin hole and is provided with a third pin hole, and the first connecting plate and the movable plate can be fixedly connected with the second connecting plate through pin shafts.
4. The brake assist mechanism of the belt-type pumping unit according to claim 3, wherein: the first connecting plate comprises two sub-connecting plates which are arranged side by side, an interval is arranged between the two sub-connecting plates, and the movable plate is positioned between the two sub-connecting plates.
5. The brake assist mechanism of the belt-type pumping unit according to claim 3, wherein: the length of the movable plate is greater than that of the first connecting plate.
6. The brake assist mechanism of the belt-type pumping unit according to claim 1, characterized in that: the first screw rod with equal threaded connection has first nut and second nut on the second screw rod, first nut is located first locating plate with between the first activity monodentate, just first nut with first locating plate in close contact with, the second nut is located the second locating plate is kept away from one side of second activity monodentate, just the second nut with second locating plate in close contact with.
7. The brake assist mechanism of the belt-type pumping unit according to claim 1, characterized in that: the fixed plate is horizontal, the groove is a T-shaped groove, the fixed plate is fixedly connected with the vertical plate through the first L-shaped connecting plate, and the vertical plate is fixedly connected with the belt type pumping unit through the second L-shaped connecting plate.
8. The brake assist mechanism of the belt-type pumping unit according to claim 1, characterized in that: and a first limiting rod facing to the first movable single tooth is arranged on the third positioning plate, and a second limiting rod facing to the second movable single tooth is fixedly arranged on the side wall of the second rack.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202122314635.7U CN216519315U (en) | 2021-09-24 | 2021-09-24 | Brake auxiliary mechanism of belt type oil pumping unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202122314635.7U CN216519315U (en) | 2021-09-24 | 2021-09-24 | Brake auxiliary mechanism of belt type oil pumping unit |
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CN216519315U true CN216519315U (en) | 2022-05-13 |
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CN202122314635.7U Expired - Fee Related CN216519315U (en) | 2021-09-24 | 2021-09-24 | Brake auxiliary mechanism of belt type oil pumping unit |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116576208A (en) * | 2023-07-14 | 2023-08-11 | 克拉玛依市圣起钻采设备有限责任公司 | Mechanical brake device for oil pumping unit |
-
2021
- 2021-09-24 CN CN202122314635.7U patent/CN216519315U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116576208A (en) * | 2023-07-14 | 2023-08-11 | 克拉玛依市圣起钻采设备有限责任公司 | Mechanical brake device for oil pumping unit |
CN116576208B (en) * | 2023-07-14 | 2023-10-03 | 克拉玛依市圣起钻采设备有限责任公司 | Mechanical brake device for oil pumping unit |
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Granted publication date: 20220513 |