CN111595705B - Equipment compartment fatigue test frock - Google Patents

Equipment compartment fatigue test frock Download PDF

Info

Publication number
CN111595705B
CN111595705B CN202010492092.5A CN202010492092A CN111595705B CN 111595705 B CN111595705 B CN 111595705B CN 202010492092 A CN202010492092 A CN 202010492092A CN 111595705 B CN111595705 B CN 111595705B
Authority
CN
China
Prior art keywords
unit
loading
fixing
equipment cabin
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010492092.5A
Other languages
Chinese (zh)
Other versions
CN111595705A (en
Inventor
谈源
李春惠
乔志红
陈浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou New Intelligent Technology Co Ltd
Original Assignee
Changzhou New Intelligent Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changzhou New Intelligent Technology Co Ltd filed Critical Changzhou New Intelligent Technology Co Ltd
Priority to CN202010492092.5A priority Critical patent/CN111595705B/en
Publication of CN111595705A publication Critical patent/CN111595705A/en
Application granted granted Critical
Publication of CN111595705B publication Critical patent/CN111595705B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention provides a device for testing fatigue of an equipment cabin, which comprises: the device comprises a vertical loading unit, a lateral loading unit, a fixing unit and a guiding unit, wherein the fixing unit is used for fixing the equipment cabin on a workbench in a reverse buckling manner; the vertical loading unit is arranged above the equipment cabin and used for applying vertical reciprocating load to a bottom plate of the equipment cabin; the lateral loading units are arranged on two sides and used for applying lateral reciprocating loads to side plates of the equipment cabin; the guide unit is used for guiding the side loading unit during testing. Compared with the prior art, the fatigue strength test device has the advantages that the fatigue strength test is carried out on the bottom plate of the equipment cabin through the vertical loading units, the fatigue strength test is carried out on the two side plates of the equipment cabin through the two lateral loading units, the whole fatigue test of the equipment cabin is realized, secondly, the lateral loading units only have freedom degrees in the vertical direction of the side plates through the guide units, the additional loads in other directions are decomposed, and the whole fatigue test is closer to the real stress condition.

Description

Equipment compartment fatigue test frock
Technical Field
The invention relates to the technical field of fatigue tests, in particular to a device for testing fatigue of an equipment compartment.
Background
At present, with the continuous development of light weight technology, the composite material is widely applied to high-speed rail equipment cabins as a light and high-performance material.
In the forming process of the equipment cabin, the equipment cabin is mostly connected in the form of embedded parts, so that the whole fatigue strength test is required, namely, the test from a raw material level, a component level to a component level is completed.
Disclosure of Invention
In view of this, the present invention provides an apparatus for testing fatigue of an equipment compartment, which aims to solve the technical problems mentioned in the background art.
The invention provides a device for testing fatigue of an equipment cabin, which comprises: the device comprises a vertical loading unit, a lateral loading unit, a fixing unit and a guide unit;
the fixing unit is used for fixing the equipment cabin on the workbench in a back-off manner;
the vertical loading unit is arranged above the equipment cabin and is used for applying vertical reciprocating load to a bottom plate of the equipment cabin;
the lateral loading units are arranged on two sides and used for applying lateral reciprocating loads to side plates of the equipment cabin;
the guide unit is used for guiding the side loading unit during testing.
Further, the vertical loading unit comprises a portal frame, a first driving cylinder, a load connecting plate and a loading module;
the first driving cylinder is vertically fixedly connected to the portal frame, and exerts drawing force on the bottom plate through stretching;
the load connecting plate is used for connecting the loading module and the first actuating cylinder.
Furthermore, the loading module at least comprises two loading assemblies and a connecting piece for connecting the two loading assemblies.
Further, each loading component comprises an adsorption unit, a rectangular frame and connecting splines for fixing the adsorption unit on the rectangular frame, and the connecting splines are arranged at equal intervals along the length direction of the rectangular frame.
Further, the side loading unit comprises a fixing frame, a second driving cylinder, an adsorption unit, a rectangular frame and an arc-shaped spline for fixing the adsorption unit on the rectangular frame.
Further, the adsorption unit comprises an aluminum profile and a vacuum sucker, and the vacuum sucker is fixedly connected with the same side of the aluminum profile.
Further, the guide unit comprises a fixed support, a guide shaft, a linear bearing and a fixed bracket;
the fixing support is used for fixing the linear bearing on the fixing support;
the guide shaft penetrates through the linear bearing, and one end of the guide shaft is fixedly connected with the rectangular frame.
Furthermore, the fixing frame comprises a base plate, a guide pillar, a screw rod, a nut, a sliding plate and a limiting guide rod;
the substrate is vertically arranged;
the sliding plate is arranged on one side close to the equipment cabin and is connected with the base plate in a sliding mode;
the screw nut is fixedly connected to one side of the sliding plate, which is far away from the equipment cabin;
the screw rod is vertically arranged and penetrates through the nut, and the screw rod drives the sliding plate to slide along the length direction of the substrate through rotation;
the guide post is arranged between the two screw rods;
the limiting guide rods are arranged on two sides of the guide pillar, and the end parts of the limiting guide rods are fixedly connected with the sliding plate.
Compared with the prior art, the equipment compartment fatigue testing device has the advantages that the fatigue strength of the bottom plate of the equipment compartment is tested through the vertical loading unit, the fatigue strength of the two side plates of the equipment compartment is tested through the two lateral loading units, the whole fatigue test of the equipment compartment is realized, the lateral loading units only have freedom degrees in the vertical direction of the side plates through the guide units, additional loads in other directions are decomposed, and the whole fatigue test is closer to the real stress condition.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of an equipment bay according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus cabin fatigue testing apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a vertical loading unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a loading module according to an embodiment of the present invention;
fig. 5 is an assembly schematic diagram of a loading assembly according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a loading assembly according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a guiding unit according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an adsorption unit according to an embodiment of the present invention;
fig. 9 is a schematic structural view of a fixing frame according to an embodiment of the present invention;
reference numerals: 1. a vertical loading unit; 11. a gantry; 12. a first master cylinder; 13. a load connecting plate; 14. loading a module; 141. loading the component; 1411. connecting sample strips; 142. connecting sheets; 2. a side loading unit; 21. a fixed mount; 211. a substrate; 212. a guide post; 213. a screw rod; 214. a nut; 215. a slide plate; 216. a limiting guide rod; 22. a second master cylinder; 3. a fixing unit; 4. a guide unit; 41. fixing the strut; 42. a guide shaft; 43. a linear bearing; 44. fixing a bracket; 5. a work table; 6. an equipment compartment; 61. a base plate; 62. a side plate; 7. an adsorption unit; 71. an aluminum profile; 72. a vacuum chuck; 8. a rectangular frame.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure 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 disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 2 to 9, it can be seen that the apparatus for testing fatigue of an equipment compartment according to an embodiment of the present invention includes: the device comprises a vertical loading unit 1, a lateral loading unit 2, a fixing unit 3 and a guiding unit 4, wherein the fixing unit 3 is used for fixing the equipment cabin 6 on the workbench 5 in an inverted mode, the vertical loading unit 1 is arranged above the equipment cabin 6 and used for applying vertical reciprocating loads to a bottom plate 61 of the equipment cabin 6, the lateral loading unit 2 is arranged on two sides and used for applying lateral reciprocating loads to side plates 62 of the equipment cabin 6, and the guiding unit 4 is used for guiding the lateral loading unit 2 during testing. Compared with the prior art, the equipment compartment fatigue testing device has the advantages that the equipment compartment fatigue strength is tested simultaneously through the vertical loading unit 1 and the two lateral loading units 2, the whole fatigue test of the equipment compartment is realized, secondly, the lateral loading units 2 only have freedom degrees in the vertical direction of the side plate 62 through the guide unit 4, additional loads in other directions are decomposed, and the whole fatigue test is closer to the real stress condition.
Referring to fig. 1, it can be seen that, because the end portions of the two side plates 62 of the equipment compartment 6 are provided with the supporting grooves 63 connected with the vehicle body, in this embodiment, the fixing unit 3 is a fixing block matched with the supporting grooves 63, the top portion is fixedly connected with the supporting grooves 63 through bolts, and the bottom portion is fixedly connected with the workbench 5, the connection mode has a simple structure, is convenient to detach, and does not damage the structure of the equipment compartment itself.
With reference to fig. 2 and fig. 3, it can be seen that the vertical loading unit 1 according to this embodiment includes a gantry 11, a first master cylinder 12, a load connecting plate 13, and a loading module 14, wherein the first master cylinder 12 is vertically fixed on the gantry 11, a telescopic end of the first master cylinder is disposed downward, a pulling force is applied to the bottom plate 61 through telescoping to perform a fatigue test, the load connecting plate 13 is used to connect the loading module 14 and the first master cylinder 12, and in specific implementation, the load connecting plate 13 is disposed at a center position of the loading module 14.
With reference to fig. 4 and fig. 5, it can be seen that the loading module 14 of the present embodiment at least includes two loading assemblies 141 and a connecting piece 142 for connecting the two loading assemblies 141, that is, a sectional design is adopted to avoid the problems of transportation inconvenience and processing difficulty caused by the oversize loading module 14. During specific assembly, the connecting sheet 142 is arranged along the length direction of the splicing seam, finally, the edge sealing connection at two ends is carried out to further enhance the connection strength, and the bending phenomenon of the connecting sheet 142 is avoided by filling massive aluminum profiles between two adjacent loading assemblies 141.
With continued reference to fig. 6, it can be seen that each loading assembly 141 includes an adsorption unit 7, a rectangular frame 8, and connecting splines 1411 for fixing the adsorption unit 7 on the rectangular frame 8, in this embodiment, the connecting splines 1411 are long, are equidistantly arranged along the length direction of the rectangular frame 8, and are parallel to the width direction of the rectangular frame 8.
With continuing reference to fig. 7, it can be seen that the side loading unit 2 includes a fixing frame 21, a second driving plate 22, an absorption unit 7, a rectangular frame 8 and an arc spline for fixing the absorption unit 7 on the rectangular frame 8, wherein the curvature of the arc spline 21 is selected according to the curvature of the side plate 62, so as to ensure that the vacuum chuck set is uniformly arranged outside the side plate 62.
Continuing to refer to fig. 8, it can be known from the figure that the adsorption unit 7 includes the aluminum profile 71 and the vacuum chucks 72, and the plurality of vacuum chucks 72 are fixedly connected to the same side of the aluminum profile 71, so that the design avoids the situations of complex processing and inconvenient disassembly caused by fixing the L-shaped bracket, and meanwhile, the distance distribution between the vacuum chucks 72 can be rapidly adjusted according to actual requirements.
With reference to fig. 7, it can be seen that the guiding unit 4 includes a fixing support 41, a guiding axle 42, a linear bearing 43, and a fixing support 44, wherein the fixing support 44 is used for fixing the linear bearing 43 on the fixing support 41, the guiding axle 42 is inserted into the linear bearing 43, and one end of the guiding axle is fixedly connected to the rectangular frame 8.
Continuing to refer to fig. 9, it can be seen that the fixing frame 21 includes a base plate 211, a guide post 212, a screw rod 213, a nut 214, a sliding plate 215, and a limit guide rod 216, wherein the base plate 211 is vertically disposed, the sliding plate 215 is disposed at a side close to the equipment compartment 6 and slidably connected to the base plate 211, the nut 214 is fixedly connected to a side of the sliding plate 215 away from the equipment compartment 6, the screw rod 213 is vertically disposed and penetrates through the nut 214, the screw rod 213 drives the sliding plate 215 to slide along a length direction of the base plate 211 by rotating, the guide post 212 is disposed between the two screw rods 213, the limit guide rod 216 is disposed at two sides of the guide post 212, and an end portion of the limit guide rod 216 is fixedly connected to the sliding plate 215. This arrangement enables the height of the lateral loading unit 2 to be adjusted at any time.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (2)

1. An equipment compartment fatigue testing device, comprising: the device comprises a vertical loading unit (1), a lateral loading unit (2), a fixing unit (3) and a guide unit (4); the fixing unit (3) is used for fixing the equipment cabin (6) on the workbench (5) in an inverted manner; the vertical loading unit (1) is arranged above the equipment cabin (6) and is used for applying vertical reciprocating load to a bottom plate (61) of the equipment cabin (6); the lateral loading units (2) are arranged on two sides and are used for applying lateral reciprocating loads to side plates (62) of the equipment cabin (6); the guide unit (4) is used for guiding the side loading unit (2) during testing;
the lateral loading unit (2) comprises a fixed frame (21), a second active cylinder (22), an adsorption unit (7), a rectangular frame (8) and an arc spline for fixing the adsorption unit (7) on the rectangular frame (8);
the adsorption unit (7) comprises an aluminum profile (71) and a plurality of vacuum suckers (72), and the vacuum suckers (72) are fixedly connected to the same side of the aluminum profile (71);
the guide unit (4) comprises a fixed support column (41), a guide shaft (42), a linear bearing (43) and a fixed bracket (44); the fixing bracket (44) is used for fixing the linear bearing (43) on the fixing support column (41); the guide shaft (42) penetrates through the linear bearing (43), and one end part of the guide shaft is fixedly connected with the rectangular frame (8);
the vertical loading unit (1) comprises a portal frame (11), a first active cylinder (12), a load connecting plate (13) and a loading module (14); the first driving cylinder (12) is vertically fixedly connected to the portal frame (11), and exerts drawing force on the bottom plate (61) through extension and retraction; the load connecting plate (13) is used for connecting the loading module (14) and the first master cylinder (12);
the loading module (14) at least comprises two loading components (141) and a connecting piece (142) used for connecting the two loading components (141);
each loading assembly (141) comprises an adsorption unit (7), a rectangular frame (8) and connecting splines (1411) for fixing the adsorption unit (7) on the rectangular frame (8), wherein a plurality of connecting splines (1411) are arranged at equal intervals along the length direction of the rectangular frame (8).
2. The equipment compartment fatigue testing device of claim 1, wherein the fixing frame (21) comprises a base plate (211), a guide post (212), a screw rod (213), a nut (214), a sliding plate (215) and a limit guide rod (216); the substrate (211) is vertically arranged; the sliding plate (215) is arranged on one side close to the equipment cabin (6) and is connected with the base plate (211) in a sliding manner; the screw nut (214) is fixedly connected to one side of the sliding plate (215) far away from the equipment cabin (6); the screw rod (213) is vertically arranged and penetrates through the screw nut (214), and the screw rod (213) drives the sliding plate (215) to slide along the length direction of the substrate (211) through rotation; the guide post (212) is arranged between the two screw rods (213); the limiting guide rods (216) are arranged on two sides of the guide post (212), and the end parts of the limiting guide rods are fixedly connected with the sliding plate (215).
CN202010492092.5A 2020-06-03 2020-06-03 Equipment compartment fatigue test frock Active CN111595705B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010492092.5A CN111595705B (en) 2020-06-03 2020-06-03 Equipment compartment fatigue test frock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010492092.5A CN111595705B (en) 2020-06-03 2020-06-03 Equipment compartment fatigue test frock

Publications (2)

Publication Number Publication Date
CN111595705A CN111595705A (en) 2020-08-28
CN111595705B true CN111595705B (en) 2023-03-14

Family

ID=72189979

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010492092.5A Active CN111595705B (en) 2020-06-03 2020-06-03 Equipment compartment fatigue test frock

Country Status (1)

Country Link
CN (1) CN111595705B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112182741B (en) * 2020-09-04 2023-04-18 中车长春轨道客车股份有限公司 Design method of high-strength under-train equipment cabin for high-speed motor train unit

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103293059A (en) * 2013-05-10 2013-09-11 北京航空航天大学 Compression fatigue testing device and method for low-speed impacted composite material laminate
CN104048817A (en) * 2013-03-13 2014-09-17 中华人民共和国昆山出入境检验检疫局 Comprehensive strength testing machine for bicycle carrier or child seat
CN203858150U (en) * 2014-04-22 2014-10-01 奇瑞汽车股份有限公司 Force transfer device for loading test equipment
CN107202700A (en) * 2017-05-24 2017-09-26 东北大学 A kind of train frame fatigue test board
CN108801622A (en) * 2018-07-12 2018-11-13 株洲时代新材料科技股份有限公司 Air spring three-dimensional Combined Loading fatigue experimental device and method
CN108827667A (en) * 2018-07-20 2018-11-16 常州市新创智能科技有限公司 A kind of curved face type fatigue batten detection device
CN110702544A (en) * 2019-10-15 2020-01-17 常州达姆斯检测技术有限公司 Fatigue detection device with reinforcing rib parts on surface
CN210293656U (en) * 2019-09-18 2020-04-10 江苏华复轨道交通科技有限公司 Bottom plate fatigue test frock
CN210571705U (en) * 2019-06-03 2020-05-19 常州达姆斯检测技术有限公司 Fatigue strength test fixture for high-speed rail equipment cabin bottom plate

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6718833B2 (en) * 2001-03-05 2004-04-13 Adtech Systems Research, Inc. Multiaxial high cycle fatigue test system
CN109100219B (en) * 2018-05-31 2021-04-27 西北工业大学 Fretting fatigue test device and method
CN109357961A (en) * 2018-12-12 2019-02-19 吉林大学 A kind of workshop flap seat biaxial loadings fatigue experimental device and test method
CN110174214A (en) * 2019-06-27 2019-08-27 西安航空学院 Rotary pressure sensor fatigue experimental device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104048817A (en) * 2013-03-13 2014-09-17 中华人民共和国昆山出入境检验检疫局 Comprehensive strength testing machine for bicycle carrier or child seat
CN103293059A (en) * 2013-05-10 2013-09-11 北京航空航天大学 Compression fatigue testing device and method for low-speed impacted composite material laminate
CN203858150U (en) * 2014-04-22 2014-10-01 奇瑞汽车股份有限公司 Force transfer device for loading test equipment
CN107202700A (en) * 2017-05-24 2017-09-26 东北大学 A kind of train frame fatigue test board
CN108801622A (en) * 2018-07-12 2018-11-13 株洲时代新材料科技股份有限公司 Air spring three-dimensional Combined Loading fatigue experimental device and method
CN108827667A (en) * 2018-07-20 2018-11-16 常州市新创智能科技有限公司 A kind of curved face type fatigue batten detection device
CN210571705U (en) * 2019-06-03 2020-05-19 常州达姆斯检测技术有限公司 Fatigue strength test fixture for high-speed rail equipment cabin bottom plate
CN210293656U (en) * 2019-09-18 2020-04-10 江苏华复轨道交通科技有限公司 Bottom plate fatigue test frock
CN110702544A (en) * 2019-10-15 2020-01-17 常州达姆斯检测技术有限公司 Fatigue detection device with reinforcing rib parts on surface

Also Published As

Publication number Publication date
CN111595705A (en) 2020-08-28

Similar Documents

Publication Publication Date Title
CN111595705B (en) Equipment compartment fatigue test frock
CN111766143B (en) Universal testing machine
CN201744811U (en) Longitudinal beam assembling tool
CN104759864B (en) Secondary frame lining for automobile press-loading apparatus
CN211402109U (en) Laser detection driving device
CN105729135A (en) Machining center
CN107576567B (en) Experimental platform and testing method for composite testing of mechanical properties of dot matrix sandwich composite sheet
CN110441041A (en) Aerial hydraulic attachments linear displacement loading test device
CN112326218B (en) Modular servo damping device testing machine of electricity liquid
CN111618756B (en) Large cabin simulation chassis butt joint device and method
CN212080646U (en) Fixing device for engineering detection
CN110726570A (en) Tire loading fatigue test device and test method
CN110759276B (en) Movable lifting platform for docking with large-scale comprehensive environment test system
CN110076440B (en) Method for welding aluminum alloy vehicle body cylinder assembly of railway vehicle by using static double-shaft-shoulder or four-shaft-shoulder stirring head with auxiliary rope pulling device
CN113707766A (en) Battery string EL repairing machine
CN210014986U (en) Fatigue test fixture for cabin supporting groove of high-speed rail equipment
CN210719729U (en) Tire loading fatigue test device
CN114235553B (en) Multifunctional compression shear testing machine
CN211477605U (en) Gearbox test platform adjusts rack mechanism
CN110806312A (en) Clamp, device and method for automobile steering column crushing performance test
CN214472465U (en) Fatigue test tool
CN214109347U (en) Welding jig quick change device
CN219053506U (en) Locking device for clamping ring and gasket of automobile gear shifter
CN219224155U (en) Vehicle side protection detection device
CN117629511B (en) Quick positioner of aviation containerized cargo focus position

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant