CN114235560A - Positioning assembly for karst rock mass mechanics triaxial test machine - Google Patents
Positioning assembly for karst rock mass mechanics triaxial test machine Download PDFInfo
- Publication number
- CN114235560A CN114235560A CN202111409983.0A CN202111409983A CN114235560A CN 114235560 A CN114235560 A CN 114235560A CN 202111409983 A CN202111409983 A CN 202111409983A CN 114235560 A CN114235560 A CN 114235560A
- Authority
- CN
- China
- Prior art keywords
- movable
- positioning
- locking
- fixed body
- assembly
- 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.)
- Pending
Links
- 239000011435 rock Substances 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 238000001125 extrusion Methods 0.000 claims description 32
- 230000000694 effects Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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
- G01N3/02—Details
- G01N3/04—Chucks
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
Landscapes
- 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)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a positioning assembly for a karst rock mechanics triaxial tester, and for the positioning device for the triaxial tester designed by the invention, through the matching use of a limiting ring and a clamping assembly arranged on a workbench, the positioning device can perform good position positioning work on a test rock sample, so that the mechanical test work can not generate position deviation, and the accuracy of a detection result is improved.
Description
Technical Field
The invention relates to the technical field of rock mass mechanics test equipment, in particular to a positioning assembly for a karst rock mass mechanics triaxial test machine.
Background
The axial pressure test device comprises an axial pressure system, a confining pressure system and a low-temperature control system, and the working principle is that an axial sample force is applied to a sample through the axial system, confining pressure is applied to the sample through a pressure chamber, and meanwhile, the upper end face, the lower end face and the middle part of the sample are respectively in different temperature environments through the temperature control system, so that various actual working conditions of freezing, freezing and thawing of the sample are simulated.
When mechanical test is carried out on the karst rock mass, the rock mass on the working table does not have a good positioning device, and in the mechanical test process, the position of a rock mass sample can be deviated or slid, so that the mechanical analysis of the rock mass sample is difficult, the precision of a test result is reduced, and the working quality of rock mass mechanical test is influenced.
Therefore, the positioning assembly for the karst rock mechanics triaxial testing machine is provided for solving the problems.
Disclosure of Invention
The invention aims to provide a positioning assembly for a karst rock mechanics triaxial test machine, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a positioning assembly for a karst rock mechanics triaxial test machine comprises a workbench, a limiting ring, a clamping assembly and a locking assembly;
the workbench is fixedly provided with a limiting ring, the limiting ring is movably sleeved with a movable sleeve ring, the outer side wall of the movable sleeve ring is integrally formed with a control handle, the inner side wall is integrally formed with an extrusion inclined plate at equal intervals, the outer side wall of the movable sleeve ring is provided with positioning clamping grooves at equal intervals, the extrusion inclined plate is movably arranged in a movable groove, and the movable groove is arranged in the limiting ring at equal intervals;
the equidistance is provided with the centre gripping subassembly in the spacing ring to the spacing ring is locked fixedly through the locking Assembly who sets up.
Preferably, the movable grooves correspond to the extrusion inclined plates in arrangement position, are arranged in the same number of groups, and are provided with four groups.
Preferably, the centre gripping subassembly includes movable rod, auxiliary block, coupling spring, skid proof block, the activity of movable rod equidistance sets up in the spacing ring to in the one end of movable rod extends to the activity groove, the both sides integrated into one piece symmetry of movable rod is provided with first lug, one side integrated into one piece of first lug is provided with first reset spring, and first reset spring other end is fixed to be set up in the spacing ring, is provided with the recess in the movable rod, and the activity is provided with auxiliary block in the recess, the one end integrated into one piece of auxiliary block is provided with coupling spring, and the terminal surface integrated into one piece of the other end is provided with skid proof block to coupling spring's other end is fixed to be set up in the recess.
Preferably, the movable rods correspond to the movable grooves and the extrusion inclined plate in arrangement position and are arranged in the same number, and the movable rods are movably arranged in the movable grooves, and the end parts of the movable rods are arranged to be arc-shaped surfaces.
Preferably, the locking assembly comprises a fixed body, a movable round block, an arc extrusion chute, a knob, a movable column, a positioning fixture block, a locking clamping groove, a locking clamping strip and a pull buckle, the fixed body is fixedly arranged on the workbench and is arranged at the side position of the movable lantern ring, the movable round block is movably arranged in the fixed body, the arc extrusion chute and the locking clamping groove are arranged on the outer side wall of the movable round block, an inserting shaft is integrally formed at one end of the movable round block and is inserted into the fixed body, one end of the inserting shaft is fixedly arranged on the knob, the movable column is movably arranged in the fixed body, one end of the movable column is movably arranged in the arc extrusion chute, the other end of the movable column is integrally formed with the positioning fixture block, the positioning fixture block is symmetrically provided with a second reset spring at the end connected with the movable column, and the other end of the second reset spring is fixedly arranged in the fixed body, the locking clamping strip is movably arranged in the fixed body and is arranged at the side position of the movable round block, a pull buckle is arranged at one end of the locking clamping strip in an integrally formed mode, a second convex block is arranged at one side of the locking clamping strip in an integrally formed mode, a third reset spring is arranged at one side of the second convex block in an integrally formed mode, and the other end of the third reset spring is fixedly arranged in the fixed body.
Preferably, the locking clamping strip and the locking clamping groove are in adaptive clamping connection, the setting positions are corresponding, and the setting groups are the same.
Preferably, the positioning fixture block corresponds to the movable column and the arc extrusion chute in arrangement position and is arranged in the same number of groups, and the end part of the movable column movably arranged in the arc extrusion chute is arranged to be an arc surface.
Preferably, the positioning fixture block corresponds to the positioning slot in position, and the width of the cross section of the end part of the positioning fixture block is equal to the width of the notch of the positioning slot.
Compared with the prior art, the invention has the beneficial effects that:
according to the positioning device for the triaxial testing machine, the limiting ring and the clamping assembly which are arranged on the workbench are matched for use, so that the rock sample can be well positioned, the mechanical test can be ensured not to generate position deviation, the accuracy of a detection result is improved, meanwhile, the auxiliary block, the connecting spring and the anti-skid bump are arranged, the samples of different specifications and types can be correspondingly regulated and positioned, the positioning device has good use flexibility, the use convenience is improved, the clamping assembly is locked through the locking assembly, the positioning stability is further improved, the detection work quality is ensured, and the work efficiency is improved.
Drawings
FIG. 1 is a schematic view of the structural connection of the present invention;
FIG. 2 is an enlarged view of the locking assembly of FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of a portion of the clamping assembly of FIG. 1;
FIG. 4 is a schematic view of the inner structure of the stop collar of the present invention;
FIG. 5 is an enlarged partial view of the structural joint of FIG. 4 according to the present invention;
FIG. 6 is a partial cross-sectional view of the internal structure of the anchor body in the locking assembly of the present invention;
FIG. 7 is an enlarged partial view of the structural joint of FIG. 6 according to the present invention;
FIG. 8 is a top view of the internal structural connection of the anchor in the locking assembly of the present invention;
fig. 9 is a partially enlarged view of the structural connection of fig. 8 according to the present invention.
In the figure: the clamping device comprises a workbench 1, a limiting ring 2, a movable lantern ring 3, a control handle 4, a positioning clamping groove 5, an extrusion inclined plate 6, a movable groove 7, a clamping component 8, a movable rod 801, an auxiliary block 802, a connecting spring 803, an anti-skid bump 804, a locking component 9, a fixed body 901, a movable round block 902, an arc extrusion inclined groove 903, a knob 904, a movable column 905, a positioning clamping block 906, a locking clamping groove 907, a locking clamping strip 908 and a pull buckle 909.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work, belong to the scope of protection of the present invention.
Referring to fig. 1 to 9, the present invention provides a technical solution: the invention discloses a positioning assembly for a karst rock mechanics triaxial test machine, which comprises a workbench 1, a limiting ring 2, a clamping assembly 8 and a locking assembly 9;
a limiting ring 2 is fixedly arranged on the workbench 1, a movable sleeve ring 3 is movably sleeved on the limiting ring 2, a control handle 4 is integrally formed on the outer side wall of the movable sleeve ring 3, an extrusion inclined plate 6 is equidistantly formed on the inner side wall, positioning clamping grooves 5 are equidistantly formed on the outer side wall of the movable sleeve ring 3, the extrusion inclined plate 6 is movably arranged in a movable groove 7, and the movable grooves 7 are equidistantly arranged in the limiting ring 2;
the spacing is provided with centre gripping subassembly 8 in the spacing ring 2 to the spacing ring 2 is locked fixedly through the locking Assembly 9 that sets up.
Preferably, the movable grooves 7 correspond to the extrusion inclined plates 6 in arrangement position, are arranged in the same number of groups, and are provided with four groups.
The clamping assembly 8 here comprises a movable rod 801, an auxiliary block 802, a connecting spring 803, and an anti-slip bump 804, wherein the movable rod 801 is movably disposed in the spacing ring 2 at equal intervals, and one end of the movable rod 801 extends into the movable groove 7, wherein the movable rod 801 and the movable groove 7 and the compression sloping plate 6 are arranged at the same position and the same number of groups, the end part of the movable rod 801 movably arranged in the movable groove 7 is set to be an arc surface, the two sides of the movable rod 801 are integrally formed and symmetrically provided with first convex blocks, one side of each first convex block is integrally formed and provided with a first return spring, the other end of each first return spring is fixedly arranged in the limiting ring 2, a groove is arranged in the movable rod 801, an auxiliary block 802 is movably arranged in the groove, one end of the auxiliary block 802 is integrally formed with a connecting spring 803, the end face of the other end of the auxiliary block 802 is integrally formed with an anti-slip bump 804, and the other end of the connecting spring 803 is fixedly arranged in the groove.
The locking assembly 9 comprises a fixed body 901, a movable round block 902, an arc extrusion chute 903, a knob 904, a movable column 905, a positioning fixture block 906, a locking fixture groove 907, a locking fixture strip 908 and a pull buckle 909, wherein the fixed body 901 is fixedly arranged on the workbench 1 and is arranged at the side position of the movable lantern ring 3, the movable round block 902 is movably arranged in the fixed body 901, the arc extrusion chute 903 and the locking fixture groove 907 are arranged on the outer side wall of the movable round block 902, an inserting shaft is integrally formed at one end of the movable round block 902 and is inserted into the fixed body 901, one end of the inserting shaft is fixedly arranged on the knob 904, the movable column 905 is movably arranged in the fixed body 901, one end of the movable column 905 is movably arranged in the arc extrusion chute 903, a positioning fixture block 906 is integrally formed at the other end of the movable column 905, a second return spring is symmetrically arranged at the end of the positioning fixture block 906 connected with the movable column 905, the other end of the second reset spring is fixedly arranged in the fixed body 901, the locking clamping strip 908 is movably arranged in the fixed body 901 and is arranged at the side position of the movable round block 902, a pull buckle 909 is integrally formed at one end of the locking clamping strip 908, a second bump is integrally formed at one side of the locking clamping strip 908, a third reset spring is integrally formed at one side of the second bump, the other end of the third reset spring is fixedly arranged in the fixed body 901, and the locking clamping strip 908 and the locking clamping groove 907 are correspondingly clamped in a matched mode, and the setting positions are corresponding and the set number is the same.
The positioning fixture blocks 906 correspond to the movable columns 905 and the arc extrusion chute 903 in arrangement positions and are arranged in the same number, and the end parts of the movable columns 905 movably arranged in the arc extrusion chute 903 are arranged to be arc surfaces; the positioning fixture block 906 corresponds to the positioning fixture groove 5 in arrangement position, and the width of the cross section of the end part of the positioning fixture block 906 is equal to that of the notch of the positioning fixture groove 5.
The working principle is as follows: when the sample rock mass is positioned, the sample rock mass is placed in the limiting ring 2, then the movable sleeve ring 3 is driven to rotate by the control handle 4, so that the extrusion inclined plate 6 in the movable sleeve ring 3 moves in the movable groove 7, the movable rod 801 is extruded, the movable rod 801 pushes the auxiliary block 802 to clamp and position the edge side of the sample rock mass, until the sample rock mass is clamped, the knob 904 is rotated, the knob 904 drives the movable circular block 902 to rotate, on one hand, the arc extrusion inclined groove 903 extrudes the movable column 905, the movable column 905 pushes the positioning fixture block 906 to be clamped into the positioning fixture groove 5 at the corresponding position on the movable sleeve ring 3, meanwhile, the locking fixture groove 907 at one side of the movable circular block 902 reaches the position of the locking fixture strip, the locking fixture strip 908 is clamped into the locking fixture groove 907 under the action of the third return spring, so that the movable circular block 902 is locked, and the position of the movable sleeve ring 3 is locked, realize the position location of rock mass sample, convenient operation, it is simple to use, it is nimble good, when its position locking is relieved to needs, first-selected pulling button 909 drives locking gib 908 and separates from locking draw-in groove 907, rotate knob 904 in the opposite direction after that, make the extrusion of arc extrusion chute 903 to activity post 905 relieved, location fixture block 906 separates from location draw-in groove 5 under the second reset spring effect, the locking to activity lantern ring 3 is relieved, later rethread control handle 4 opposite direction rotation activity lantern ring 3, and then can relieve fast to the location of rock mass sample.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a karst rock mass mechanics positioning assembly for triaxial test machine which characterized in that: comprises a workbench (1), a limiting ring (2), a clamping component (8) and a locking component (9);
the workbench (1) is fixedly provided with a limiting ring (2), the limiting ring (2) is movably sleeved with a movable sleeve ring (3), the outer side wall of the movable sleeve ring (3) is integrally formed with a control handle (4), the inner side wall is integrally formed with extrusion inclined plates (6) at equal intervals, the outer side wall of the movable sleeve ring (3) is provided with positioning clamping grooves (5) at equal intervals, the extrusion inclined plates (6) are movably arranged in movable grooves (7), and the movable grooves (7) are arranged in the limiting ring (2) at equal intervals;
the limiting ring (2) is equidistantly provided with a clamping assembly (8), and the limiting ring (2) is locked and fixed through a locking assembly (9).
2. The positioning assembly for the karst rock mechanics triaxial test machine according to claim 1, wherein: the movable grooves (7) correspond to the extrusion inclined plates (6) in arrangement position, are arranged in the same number of groups, and are provided with four groups.
3. The positioning assembly for the karst rock mechanics triaxial test machine according to claim 1, wherein: centre gripping subassembly (8) include movable rod (801), supplementary piece (802), coupling spring (803), skid proof block (804), movable rod (801) equidistance activity sets up in spacing ring (2), and the one end of movable rod (801) extends to in activity groove (7), the both sides integrated into one piece symmetry of movable rod (801) is provided with first lug, one side integrated into one piece of first lug is provided with first reset spring, the fixed setting of first reset spring other end is in spacing ring (2), be provided with the recess in movable rod (801), the activity is provided with supplementary piece (802) in the recess, the one end integrated into one piece of supplementary piece (802) is provided with coupling spring (803), the terminal surface integrated into one piece of the other end is provided with skid proof block (804) to the other end of coupling spring (803) is fixed to be set up in the recess.
4. The positioning assembly for the karst rock mechanics triaxial test machine according to claim 3, wherein: the movable rods (801) correspond to the movable grooves (7) and the extrusion inclined plates (6) in arrangement positions and are arranged in the same number, and the ends of the movable rods (801) movably arranged in the movable grooves (7) are arc-shaped surfaces.
5. The positioning assembly for the karst rock mechanics triaxial test machine according to claim 1, wherein: the locking assembly (9) comprises a fixed body (901), a movable round block (902), an arc extrusion chute (903), a knob (904), a movable column (905), a positioning fixture block (906), a locking fixture groove (907), a locking fixture strip (908) and a pull buckle (909), wherein the fixed body (901) is fixedly arranged on the workbench (1) and arranged at the side position of the movable lantern ring (3), the movable round block (902) is movably arranged in the fixed body (901), the arc extrusion chute (903) and the locking fixture groove (907) are arranged on the outer side wall of the movable round block (902), an inserting shaft is integrally formed at one end of the movable round block (902) and is inserted into the fixed body (901), one end of the inserting shaft is fixedly arranged on the knob (904), the movable column (905) is movably arranged in the fixed body (901), one end of the movable column (905) is movably arranged in the arc extrusion chute (903), the other end is provided with a positioning fixture block (906) in an integrated manner, the positioning fixture block (906) is symmetrically provided with a second return spring at the end connected with the movable column (905) in an integrated manner, the other end of the second return spring is fixedly arranged in the fixed body (901), the locking clamp strip (908) is movably arranged in the fixed body (901) and is arranged at the side position of the movable round block (902), one end of the locking clamp strip (908) is provided with a pull buckle (909) in an integrated manner, one side of the locking clamp strip (908) is provided with a second bump in an integrated manner, one side of the second bump is provided with a third return spring in an integrated manner, and the other end of the third return spring is fixedly arranged in the fixed body (901).
6. The positioning assembly for the karst rock mechanics triaxial testing machine according to claim 5, wherein: the locking clamping strips (908) and the locking clamping grooves (907) are in matched clamping connection, the setting positions are corresponding, and the setting groups are the same.
7. The positioning assembly for the karst rock mechanics triaxial testing machine according to claim 5, wherein: the positioning fixture block (906) corresponds to the arrangement positions of the movable columns (905) and the arc extrusion chute (903) and is the same in arrangement number, and the end part of each movable column (905) movably arranged in the arc extrusion chute (903) is set to be an arc surface.
8. The positioning assembly for the karst rock mechanics triaxial test machine according to claim 7, wherein: the positioning fixture block (906) corresponds to the positioning clamping groove (5) in arrangement position, and the width of the cross section of the end part of the positioning fixture block (906) is equal to that of the notch of the positioning clamping groove (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111409983.0A CN114235560A (en) | 2021-11-25 | 2021-11-25 | Positioning assembly for karst rock mass mechanics triaxial test machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111409983.0A CN114235560A (en) | 2021-11-25 | 2021-11-25 | Positioning assembly for karst rock mass mechanics triaxial test machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114235560A true CN114235560A (en) | 2022-03-25 |
Family
ID=80751124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111409983.0A Pending CN114235560A (en) | 2021-11-25 | 2021-11-25 | Positioning assembly for karst rock mass mechanics triaxial test machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114235560A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808732A (en) * | 2022-05-17 | 2022-07-29 | 中铁三局集团第二工程有限公司 | Horizontal positioning structure, segment assembling bridge girder erection machine and construction method thereof |
| CN116123141A (en) * | 2022-12-22 | 2023-05-16 | 绍兴上虞风机销售有限公司 | Heat abstractor that fire control smoke exhaust fan was used |
-
2021
- 2021-11-25 CN CN202111409983.0A patent/CN114235560A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808732A (en) * | 2022-05-17 | 2022-07-29 | 中铁三局集团第二工程有限公司 | Horizontal positioning structure, segment assembling bridge girder erection machine and construction method thereof |
| CN116123141A (en) * | 2022-12-22 | 2023-05-16 | 绍兴上虞风机销售有限公司 | Heat abstractor that fire control smoke exhaust fan was used |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114235560A (en) | Positioning assembly for karst rock mass mechanics triaxial test machine | |
| CN209857826U (en) | Special clamp for detecting inner and outer diameter sizes of bearing ring | |
| CN211477844U (en) | Tensile test fixture with adjustable tensile angle | |
| CN205720551U (en) | A kind of composite testing fixture avoiding dislocation | |
| CN114029097A (en) | Flat test piece measuring clamp for high-low temperature environment test chamber and test method thereof | |
| CN116520000A (en) | Resistance imitating battery appearance and testing jig thereof | |
| CN106473746B (en) | Body surface positioning scale | |
| CN110576423A (en) | tool for drawing circle on surface of round pipe | |
| CN216309674U (en) | Aerospace aviation nut hardness detection equipment | |
| CN214053676U (en) | Lathe axial length location frock | |
| CN112025253B (en) | Pull rod assembly and detection integrated device | |
| CN114061776A (en) | Electrical equipment cabinet temperature detection equipment for thermal power plant | |
| CN210664214U (en) | A inspection tool that is used for circular pier stud template central point to put | |
| CN110125846B (en) | Special clamp for detecting outer diameter of bearing ring | |
| CN220084567U (en) | Tensile strength detection tool for composite material test piece | |
| CN218905079U (en) | Auxiliary positioning device for engineering machinery valve body detection | |
| CN211668810U (en) | Sampling device for soil environment detection | |
| CN220552697U (en) | Clamp and tool for insulating paper tensile test | |
| CN218481024U (en) | Crimping pipe crookedness detection device | |
| CN115452355B (en) | Spring device stroke force value detection clamp and using method thereof | |
| CN218864976U (en) | Base depth of parallelism test fixture | |
| CN219906062U (en) | Material turns to platform device | |
| CN118011062B (en) | Photovoltaic module insulation withstand voltage testing arrangement | |
| CN220931911U (en) | M value gauge for gear | |
| CN214617408U (en) | Adjustable bolt fastening connecting piece |
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 |