CN115628357A - Large-scale rotating part bearing structure - Google Patents
Large-scale rotating part bearing structure Download PDFInfo
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- CN115628357A CN115628357A CN202211167137.7A CN202211167137A CN115628357A CN 115628357 A CN115628357 A CN 115628357A CN 202211167137 A CN202211167137 A CN 202211167137A CN 115628357 A CN115628357 A CN 115628357A
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- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 230000008093 supporting effect Effects 0.000 claims abstract description 42
- 230000008878 coupling Effects 0.000 claims abstract description 19
- 238000010168 coupling process Methods 0.000 claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 description 4
- 238000005381 potential energy Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
- F16M11/10—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/16—Details concerning attachment of head-supporting legs, with or without actuation of locking members thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses a large-scale rotary part supporting structure which comprises a supporting frame, a driving mechanism and a driven mechanism, wherein the supporting frame is used for supporting a rotary part; the driving mechanism comprises a driving device and a universal coupling which are connected with each other, the driving device is arranged on the supporting frame and is connected with one end of the rotary component through the universal coupling; the driven mechanism comprises a connecting seat which can move along the axial direction of the rotary part, and the connecting seat is arranged on the supporting frame and is connected with the other end of the rotary part. The invention solves the problem that the structural deformation of the transmission structure of a large-scale rotating part is large in the operation process, and the influence is caused on the operation stability of equipment, and achieves the purpose of increasing the operation and transmission stability of the equipment.
Description
Technical Field
The invention belongs to the technical field of rotary equipment, and particularly relates to a large-scale rotary part supporting structure.
Background
Outdoor large-scale revolving parts are commonly used in the fields of engine test beds, attitude turnover test beds and the like as a common test device, however, with the increase of the scale of the tested workpiece, the weight and the volume of the revolving parts are also increased.
Because the self weight of the large-scale rotating part is larger, the structural deformation of the transmission mechanism is larger in the operation and braking processes of the equipment, so that the loss of the equipment is larger, and the maintenance or the maintenance is required frequently.
Disclosure of Invention
The invention aims to provide a large-scale rotating part supporting structure capable of integrally adapting to structural deformation of a large-span rotating part.
In order to achieve the purpose, the invention provides a large-scale rotating part supporting structure which comprises a supporting frame, a driving mechanism and a driven mechanism, wherein the supporting frame is used for supporting the rotating part;
the driving mechanism comprises a driving device and a universal coupling which are connected with each other, the driving device is arranged on the supporting frame and is connected with one end of the rotary component through the universal coupling;
the driven mechanism comprises a connecting seat which can move along the axial direction of the rotary part, and the connecting seat is arranged on the supporting frame and connected with the other end of the rotary part.
Preferably, the driving mechanism includes an adjusting bearing and a driving shaft, the driven mechanism includes a driven shaft and a driven bearing, the universal coupling is in transmission connection with the rotating component through the driving shaft, the adjusting bearing is sleeved outside the driving shaft, the adjusting bearing is mounted on the supporting frame, the driven bearing is sleeved outside the driven shaft, and the driven bearing is mounted on the connecting seat.
Preferably, the adjustment bearing is a self-aligning roller bearing.
Preferably, the support frame includes a first support frame and a second support frame, the driving mechanism and the driven mechanism are respectively installed on the first support frame and the second support frame, the second support frame is provided with a support seat in sliding connection with the bottom of the connection seat, and the connection seat can slide along the axial direction of the rotating part relative to the support seat.
Preferably, a dovetail groove is formed in the bottom of the connecting seat, the direction of the dovetail groove is the same as the axial direction of the rotary part, and a sliding rail matched with the dovetail groove in shape is arranged at the top of the supporting seat.
Preferably, the number of the connecting seats and the number of the supporting seats are two, and the two connecting seats and the two supporting seats are respectively arranged on two sides of the bottom of the driven bearing.
Preferably, a gap is formed between the first support frame and the second support frame, the rotating part is located above the gap, and the adjusting bearing and the driven bearing are respectively mounted at the tops of the first support frame and the second support frame.
Preferably, the driving mechanism further comprises a first brake, the first brake is arranged on the first support frame, and a first brake disc matched with the first brake is arranged on the driving shaft.
Preferably, the driven mechanism further comprises a second brake, the second brake is arranged on the connecting seat, and a second brake disc matched with the second brake is arranged on the driven shaft.
Preferably, the driving device is a driving motor, and the driving motor is connected with the universal coupling through a speed reducer.
Compared with the prior art, the invention has the beneficial effects that: the universal coupling is connected with the driving device and the rotary component, and can effectively absorb the deformation of the rotary component in the operation process, so that the influence of the deformation of the component on the transmission process is avoided;
furthermore, the bearing of the driving shaft adopts an adjustable self-aligning roller bearing, so that the bearing can adapt to deflection generated in the transmission process of the driving shaft and increase the transmission stability;
simultaneously, the driven bearing of driven shaft is connected through the slidable connecting seat, when equipment operation in-process takes place deformation, drives the sliding seat and takes place the displacement, and the release reduces the loss of deformation to equipment because of the potential energy that deformation produced, installs the arresting gear of driven shaft on the slidable connecting seat, can reduce the influence of equipment deformation to braking process, increases braking process's safety and stability nature.
The design structure of the invention can solve the problems of clamping stagnation of the driving system and the like caused by the deformation of the large-span support frame, can adapt to the structural deformation and the cold-hot deformation of the large-span support system, can meet the safety braking of the whole rotary component, and has high integration degree.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 is a schematic view showing the overall structure of a large-sized revolving unit support structure according to the present invention.
Fig. 2 shows a schematic view of a driving mechanism of the large revolving unit supporting structure of the present invention.
Fig. 3 shows a schematic view of a follower mechanism of the large revolving unit support structure of the present invention.
Fig. 4 shows a cross-sectional view of a coupling seat of a large pivoting member supporting structure of the present invention.
In the figure: 1. a drive mechanism; 2. a first support frame; 3. a rotating member; 4. a driven mechanism; 5. a second support frame; 1.1, driving a motor; 1.2, a speed reducer; 1.3, universal couplings; 1.4, a first brake; 1.5, adjusting a bearing; 1.6, a driving shaft; 4.1, a second brake; 4.2, a connecting seat; 4.3, a supporting seat; 4.4, driven bearing; 4.5, a driven shaft.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The embodiment discloses a large-scale rotating part supporting structure, which comprises a supporting frame for supporting a rotating part 3, a driving mechanism 1 and a driven mechanism 4, wherein two ends of the rotating part 3 are respectively connected with the driving mechanism 1 and the driven mechanism 4;
the driving mechanism 1 comprises a driving device and a universal coupling 1.3 which are connected with each other, the driving device is arranged on the supporting frame and is connected with one end of the rotary component 3 through the universal coupling 1.3;
the follower 4 comprises a connecting seat 4.2 which can move along the axial direction of the rotary part 3, and the connecting seat 4.2 is arranged on the supporting frame and is connected with the other end of the rotary part 3.
Specifically, the rotary part 3 is a main force bearing part, a shuttle-shaped truss structure is designed according to the equal strength principle, and the whole part is a closed frame. The center of mass of the rotating part is close to the rotating center;
the driving mechanism 1 and the driven structure 4 support and transmit the rotary component from two sides of the rotary component 3, and the driving device is connected with the rotary component through a universal coupling 1.3, so that the influence of the deformation of the transmission structure on the stability of the power output of the driving device when the rotary component 3 runs can be prevented;
the driven mechanism can release potential energy generated in the deformation process of the rotary component through the slidable connecting seat 4.2, and the potential energy is used as a floating end to absorb the heat expansion and cold contraction deformation generated by the rotary component due to the temperature influence and the coaxiality error caused by installation.
The driving mechanism can effectively reduce the influence of the deformation of the rotating part in the operation process on the whole equipment through the universal coupling 1.3 and the slidable connecting seat 4.2, thereby increasing the safety and the stability of the operation of the equipment, reducing the loss of the equipment, reducing the maintenance frequency of the equipment and reducing the maintenance cost of the equipment.
Preferably, the driving mechanism 1 includes an adjusting bearing 1.5 and a driving shaft 1.6, the driven mechanism 4 includes a driven shaft 4.5 and a driven bearing 4.4, the universal coupling 1.3 is in transmission connection with the revolving component 3 through the driving shaft 1.6, the adjusting bearing 1.5 is sleeved outside the driving shaft 1.6, the adjusting bearing 1.5 is mounted on the supporting frame, the driven bearing 4.4 is sleeved outside the driven shaft 4.5, and the driven bearing 4.4 is mounted on the connecting seat 4.2.
Specifically, the adjusting bearing 1.5 is a self-aligning roller bearing, and when a large-scale rotating component runs, the adjusting bearing is influenced by the self weight to generate axial deflection, so that the self-aligning roller bearing can meet the working condition requirement of the central axis deflection angle of the rotating component.
Preferably, the support frame comprises a first support frame 2 and a second support frame 5, the driving mechanism 1 and the driven mechanism 4 are respectively mounted on the first support frame 2 and the second support frame 5, the second support frame 5 is provided with a support seat 4.3 which is in sliding connection with the bottom of the connecting seat 4.2, and the connecting seat 4.2 can slide along the axial direction of the rotary part 3 relative to the support seat 4.3.
Specifically, the connecting seat adopts the supporting seat to support, and supporting seat and second carriage top fixed connection, multiplicable sliding construction's overall structure intensity to be applicable to large-scale slewing equipment operation.
Preferably, the bottom of the connecting seat 4.2 is provided with a dovetail groove, the direction of the dovetail groove is the same as the axial direction of the rotary part 3, and the top of the supporting seat 4.3 is provided with a slide rail matched with the shape of the dovetail groove.
Specifically, the dovetail groove sliding structure is adopted, so that the structural strength of the sliding structure can be met, the stability and the novelty of sliding can be ensured, lubricating grease can be coated between the dovetail groove and the sliding rail, and the smoothness of sliding is ensured.
Preferably, the number of the connecting seats 4.2 and the number of the supporting seats 4.3 are two, and the two connecting seats are respectively arranged on two sides of the bottom of the driven bearing 4.4.
Specifically, connecting seat 4.2 sets up in the both sides of driven bearing 4.4 bottom, increases the supporting effect to driven bearing 4.4, prevents that the driven shaft from bearing the influence of gyration part, increases driven bearing 4.4 at the radial support intensity of level.
Preferably, a gap is arranged between the first support frame 2 and the second support frame 5, the rotating part 3 is positioned above the gap, and the adjusting bearing 1.5 and the driven bearing 4.4 are respectively arranged at the top of the first support frame 2 and the top of the second support frame 5.
Specifically, the first support frame and the second support frame are connected with a foundation embedded part poured in a foundation through connecting plates to bear corresponding loads, and the adjusting bearing 1.5 and the driven bearing 4.4 are installed on the top of the support frames through high-strength bolts.
Preferably, the driving mechanism 1 further comprises a first brake 1.4, the first brake 1.4 is arranged on the first support frame, and a first brake disc matched with the first brake 1.4 is arranged on the driving shaft 1.6.
Specifically, the first brake 1.4 is installed on the top of the first support frame 2 through a high-strength bolt, and the first brake disc is connected with the driving shaft in a welding mode.
Preferably, the driven mechanism further comprises a second brake 4.1, the second brake 4.1 is arranged on the connecting seat 4.2, and a second brake disc matched with the second brake 4.1 is arranged on the driven shaft 4.5.
Specifically, the second brake 4.1 is mounted on the connecting seat 4.2 through a bolt, and can synchronously move along with the connecting seat, so that the purpose of synchronously braking the driven shaft is realized, and the brake effect of the second brake 4.1 is prevented from being influenced after the driven shaft moves;
the brake adopted by the embodiment adopts a normally closed hydraulic disc brake, a spring is used for braking, and the brake is released hydraulically. The clearance between the brake plate and the brake disc can meet the requirements of rolling motion. And brakes are arranged on two sides of the rotary component, so that the balance of braking force on two sides of the rotary component is ensured.
Preferably, the driving device is a driving motor 1.1, and the driving motor 1.1 is connected with a universal coupling 1.3 through a speed reducer 1.2.
Specifically, the driving motor is a power source of the rotary component, the rotary direction of the rotary component is controlled through positive and negative rotation of the motor, when the rotary component stops under the action of the driving motor, the motor brake is started, and then the brake disc is tightly held by the brake to provide additional auxiliary braking.
While embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The large-scale rotary part supporting structure is characterized by comprising a supporting frame, a driving mechanism (1) and a driven mechanism (4) which are used for supporting the rotary part (3), wherein two ends of the rotary part (3) are respectively connected with the driving mechanism (1) and the driven mechanism (4);
the driving mechanism (1) comprises a driving device and a universal coupling (1.3) which are connected with each other, the driving device is arranged on the supporting frame and is connected with one end of the rotary component (3) through the universal coupling (1.3);
the driven mechanism (4) comprises a connecting seat (4.2) capable of moving along the axis direction of the rotary component (3), and the connecting seat (4.2) is arranged on the supporting frame and connected with the other end of the rotary component (3).
2. The large-scale revolving part supporting structure according to claim 1, wherein the driving mechanism (1) comprises an adjusting bearing (1.5) and a driving shaft (1.6), the driven mechanism (4) comprises a driven shaft (4.5) and a driven bearing (4.4), the universal coupling (1.3) is in transmission connection with the revolving part (3) through the driving shaft (1.6), the adjusting bearing (1.5) is sleeved outside the driving shaft (1.6), the adjusting bearing (1.5) is installed on the supporting frame, the driven bearing (4.4) is sleeved outside the driven shaft (4.5), and the driven bearing (4.4) is installed on the connecting seat (4.2).
3. Large scale slewing component support structure according to claim 2, characterized in that the adjusting bearing (1.5) is a self-aligning roller bearing.
4. A large scale rotary part support structure according to claim 2, wherein the support frame comprises a first support frame (2) and a second support frame (5), the driving mechanism (1) and the driven mechanism (4) are respectively mounted on the first support frame (2) and the second support frame (5), the second support frame (5) is a support base (4.3) which is provided with a sliding connection with the bottom of the connection base (4.2), and the connection base (4.2) can slide along the axial direction of the rotary part (3) relative to the support base (4.3).
5. The large-scale rotating part supporting structure according to claim 4, wherein a dovetail groove is formed at the bottom of the connecting seat (4.2), the dovetail groove direction is the same as the axial direction of the rotating part (3), and a slide rail matched with the dovetail groove in shape is arranged at the top of the supporting seat (4.3).
6. Large scale revolving part support structure according to claim 4, wherein the number of the connecting seats (4.2) and the supporting seats (4.3) is two, one on each side of the bottom of the driven bearing (4.4).
7. Large scale rotary part support structure according to claim 4, characterized in that a space is provided between the first support frame (2) and the second support frame (5), the rotary part (3) is located above the space, and the adjusting bearing (1.5) and the driven bearing (4.4) are mounted on top of the first support frame (2) and the second support frame (5), respectively.
8. Large scale revolving part support structure according to claim 4, characterized in that the drive mechanism (1) further comprises a first brake (1.4), the first brake (1.4) being arranged on the first support frame, and the drive shaft (1.6) being provided with a first brake disc cooperating with the first brake (1.4).
9. Large scale revolving part support structure according to claim 4, characterized in that the driven mechanism further comprises a second brake (4.1), the second brake (4.1) being arranged on the connecting seat (4.2), and the driven shaft (4.5) being provided with a second brake disc cooperating with the second brake (4.1).
10. Large scale revolving part support structure according to claim 1, characterized in that the driving means is a driving motor (1.1), which driving motor (1.1) is connected with the universal joint coupling (1.3) by means of a speed reducer (1.2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211167137.7A CN115628357A (en) | 2022-09-23 | 2022-09-23 | Large-scale rotating part bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211167137.7A CN115628357A (en) | 2022-09-23 | 2022-09-23 | Large-scale rotating part bearing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115628357A true CN115628357A (en) | 2023-01-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211167137.7A Pending CN115628357A (en) | 2022-09-23 | 2022-09-23 | Large-scale rotating part bearing structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN115628357A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB214286A (en) * | 1922-11-13 | 1924-04-14 | Burton Neal | Driving mechanism for producing gyratory motion |
| KR20120029564A (en) * | 2010-09-17 | 2012-03-27 | 한전케이피에스 주식회사 | Turbine rotor turning device |
| CN105156555A (en) * | 2015-09-23 | 2015-12-16 | 广东工业大学 | Intelligent damping force adjusting method for damping device |
| CN205734079U (en) * | 2016-05-13 | 2016-11-30 | 曾章颜 | A kind of single servo-drive machinery disappears the revolving structure of gap |
| CN109826910A (en) * | 2019-01-31 | 2019-05-31 | 航天工程装备（苏州）有限公司 | A kind of swing mechanism |
| CN110282578A (en) * | 2019-06-18 | 2019-09-27 | 北京卫星环境工程研究所 | Spacecraft large size bay section general assembly Liftable type multi-purpose stand vehicle |
| CN112089626A (en) * | 2020-09-22 | 2020-12-18 | 厉蓓蓓 | Prevent moving and swing more stable capsule equipment of production of jolting |
-
2022
- 2022-09-23 CN CN202211167137.7A patent/CN115628357A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB214286A (en) * | 1922-11-13 | 1924-04-14 | Burton Neal | Driving mechanism for producing gyratory motion |
| KR20120029564A (en) * | 2010-09-17 | 2012-03-27 | 한전케이피에스 주식회사 | Turbine rotor turning device |
| CN105156555A (en) * | 2015-09-23 | 2015-12-16 | 广东工业大学 | Intelligent damping force adjusting method for damping device |
| CN205734079U (en) * | 2016-05-13 | 2016-11-30 | 曾章颜 | A kind of single servo-drive machinery disappears the revolving structure of gap |
| CN109826910A (en) * | 2019-01-31 | 2019-05-31 | 航天工程装备（苏州）有限公司 | A kind of swing mechanism |
| CN110282578A (en) * | 2019-06-18 | 2019-09-27 | 北京卫星环境工程研究所 | Spacecraft large size bay section general assembly Liftable type multi-purpose stand vehicle |
| CN112089626A (en) * | 2020-09-22 | 2020-12-18 | 厉蓓蓓 | Prevent moving and swing more stable capsule equipment of production of jolting |
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