CN203785974U - Table tennis ball testing device - Google Patents
Table tennis ball testing device Download PDFInfo
- Publication number
- CN203785974U CN203785974U CN201420153164.3U CN201420153164U CN203785974U CN 203785974 U CN203785974 U CN 203785974U CN 201420153164 U CN201420153164 U CN 201420153164U CN 203785974 U CN203785974 U CN 203785974U
- Authority
- CN
- China
- Prior art keywords
- table tennis
- hammer
- proving installation
- spring
- frame
- 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.)
- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a table tennis ball testing device. The table tennis ball testing device comprises a rack, a table tennis ball accommodating mechanism, a table tennis ball emitting mechanism and a table tennis ball recovering mechanism, wherein a supporting frame is arranged on the rack, and a sliding chute is formed in the supporting frame; the table tennis ball accommodating mechanism comprises an upper ball pipe, a longitudinal air cylinder and a pushing disk; the pushing disk is arranged in the upper ball pipe to push table tennis balls to move upwards, and a ball serving hole is formed in the supporting frame, and above the upper ball pipe; the table tennis ball emitting mechanism comprises a driving hammer, an elastic component connected with the driving hammer, a compression mechanism for pushing the driving hammer to compress the elastic component, and a limiting mechanism; the driving hammer moves along the sliding chute, and the table tennis ball recovering mechanism comprises a baffle plate and a tray used for receiving the table tennis balls rebounded by the baffle plate. According to the table tennis ball testing device disclosed by the utility model, a spring is driven to store energy through the air cylinder so as to push the driving hammer to emit the table tennis balls, so that the actual using conditions of the table tennis balls are simulated, the emitting speed is stable, testing results are accurate, and the testing efficiency is improved due to the full-automatic operation.
Description
Technical field
The utility model belongs to sports goods proving installation technical field, is specifically related to a kind of table tennis proving installation.
Background technology
General mechanical static test and the artificial two kinds of methods of dynamic test of adopting of existing table tennis durability test.
Machinery static test is to push table tennis 700 times by mechanical system, the extruding degree of depth is 1 millimeter, the shortcoming of this method of testing is that this test does not meet the actual conditions that table tennis is dynamically used, test result is inaccurate, reference value is not high, and the test duration is long, testing efficiency is not high, affects follow-up production.
Artificial dynamic test has following shortcoming:
1, tester impacts the dynamics difference of table tennis at every turn, affects test result;
2, the labour intensity of this method of testing is large, and tester easily produces fatigue, and the test duration is long, and testing cost is high.
Utility model content
The technological deficiencies such as while testing table tennis in order to overcome, dynamics is inhomogeneous, the test duration is long, the utility model provides a kind of full-automatic table tennis proving installation that dynamics is even, measuring accuracy is high of testing.
In order to address the above problem, the utility model is achieved by following technical scheme:
Table tennis proving installation described in the utility model, comprises frame, table tennis placement mechanism, robot machine structure and table tennis recovering mechanism, in described frame, is provided with bracing frame, and support frame as described above comprises base plate and side plate, is provided with chute on support frame as described above;
Described table tennis placement mechanism comprises the push-plate on upper bulb, the longitudinal cylinder being arranged in frame and the axis of the piston that is arranged on longitudinal cylinder, and described push-plate is arranged on promotion table tennis in bulb and moves upward, and described upper bulb sidewall is provided with goal mouth; On support frame as described above, be provided with service hole, described service hole is arranged on bulb top;
Described table tennis penetrate mechanism comprise the hammer being arranged on bracing frame, the elastomeric element being connected with hammer, for the fixed part of fixing elastic component one end, promote the compressing mechanism of hammer elasticity of compression parts and for limiting the position-limit mechanism of hammer transmitting site; Described hammer is along runner movement, and described hammer, compression member are arranged on same axis;
Described table tennis recovering mechanism comprises the pallet that is arranged on the baffle plate in service the place ahead, hole and is arranged on the table tennis of accepting baffle plate bounce-back on bracing frame, described pallet is arranged between baffle plate and upper bulb, described pallet is provided with ball mouth, and described ball mouth is corresponding with the goal mouth of upper bulb.
Further, described compressing mechanism comprises the lateral cylinder being horizontally installed on bracing frame, is arranged on hammer away from the horizontal bolt of elastomeric element one end, and one end connects lateral cylinder, one end connects the STATEMENT OF FEDERALLY SPONSORED of horizontal bolt in addition, described horizontal bolt is vertical with STATEMENT OF FEDERALLY SPONSORED to be arranged, and described horizontal bolt is along runner movement.Lateral cylinder drives horizontal bolt by STATEMENT OF FEDERALLY SPONSORED, promotes hammer elasticity of compression parts, carries out energy storage.
Further, in order to control better the position of hammer, described position-limit mechanism comprises the trigger cylinder that is arranged on fixed part, is arranged on the top iron on trigger cylinder the axis of the piston and is movably connected in the sear on bracing frame with bearing pin, on described sear, is provided with limiting section.
Further, be provided with the stopper slot coordinating with sear limiting section on described hammer, described stopper slot and limiting section are provided with the inclined-plane cooperatively interacting, and facilitate stopper slot to enter limiting section or exit limiting section.
Further, described elastomeric element is spring, and described fixed part is spring housing,, described spring is front end near hammer one end, and the other end is end, and described spring end is arranged in spring housing, and spring housing defines the position of spring one end.
Further, in order to control better the emission rate of table tennis, described spring end is provided with the governor motion of regulating spring power, described governor motion comprises nut and the screw rod coordinating with nut, spring housing and spring end are inserted in described nut one end, and described screw rod is arranged on the side plate of bracing frame, thereby by the force of compression of adjusting screw(rod) regulating spring, and then the sliding speed of control hammer, reach the object that regulates table tennis emission rate.
Further, in order to realize robotization, described governor motion also comprises driving mechanism, described driving mechanism comprises the servomotor on the side plate that is fixed on bracing frame, the gear wheel that is arranged on the pinion wheel on servomotor spindle and meshes with pinion wheel, and described gear wheel and screw rod secure fit, by the driving of servomotor, the rotation of drive screw rod, thereby make nut holddown spring, the initial position of regulating spring, and then the force of compression of regulating spring.
Further, the cross section of described pallet is V-type, and described pallet is obliquely installed, and described pallet is lower near one end of upper bulb, and its one end near baffle plate arranges compared with highland, and table tennis flows out from pallet V-type bottom, enters the goal mouth of bulb.
Further, described table tennis proving installation also comprises for testing the speed measuring device of table tennis emission rate, described speed measuring device is arranged on the position of service side, the place ahead, hole, test the speed of each table tennis transmitting and record, test result is more accurate, and for regulating table tennis emission rate that reference is provided.
Further, described frame bottom is provided with for adjusting the adjusting bolt of bottom surface flatness, prevents the out-of-flatness of frame placement platform, the test of the wobble effects table tennis of frame.
Compared with prior art, the beneficial effects of the utility model are:
The utility model drives spring to carry out energy storage by cylinder, promoting hammer launches table tennis, simulated the true service condition of table tennis, and table tennis emission rate is stable, test result is accurate, the setting of table tennis recovering mechanism, full automatic operation, improve testing efficiency, saved manpower.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail, wherein:
Fig. 1 is the structural representation of table tennis proving installation described in the utility model;
Fig. 2 is the side view of table tennis proving installation described in the utility model;
Fig. 3 is the structure enlarged drawing of position-limit mechanism in table tennis proving installation described in the utility model.
In figure: 1-bracing frame, the 101-hole of serving a ball, 102-chute, the horizontal bolt of 2-, 3-sear, 31-limiting section, 4-hammer, 41-stopper slot, 5-top iron, 6-trigger cylinder, 7-spring housing, 8-spring, 9-nut, 10-screw rod, 11-side plate, 12-double-screw bolt, 13-cylinder block, 14-cylinder, 15-servomotor, 16-pinion wheel, 17-gear wheel, 18-STATEMENT OF FEDERALLY SPONSORED, the upper ball cylinder of 19-, 20-push-plate, the upper bulb of 21-, 211-goal mouth, 22-base plate, 23-chassis, 24-frame, 25-baffle plate, 26-pallet, 27-speed measuring device, 28-table tennis, 29-adjusting bolt.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
As shown in FIG. 1 to 3, table tennis proving installation described in the utility model, comprises frame 24, is arranged on table tennis placement mechanism, robot machine structure, table tennis recovering mechanism and speed measuring device 27 in mechanism.In described frame 24, be provided with chassis 23, be provided with bracing frame 1 on chassis 23, bracing frame 1 comprises base plate 22 and side plate 11, on described base plate 22, is provided with some bolts hole, for chassis 23 connections.
Described table tennis placement mechanism comprises the upper bulb 21 that is arranged on bracing frame 1, is arranged on the upper ball cylinder 19 in frame 24 and is arranged on the push-plate 20 on ball cylinder 19 the axis of the pistons, this push-plate 20 is arranged in bulb 21, on upper bulb 21 sidewalls, be provided with goal hole 211, on support frame as described above 1, be provided with service hole 101, described service hole 101 is arranged on the top of push-plate 20, when push-plate 20 is up shifted table tennis 28 onto certain altitude, table tennis 28 falls into service hole 101, waits to be launched.
Described table tennis recovering mechanism comprises the baffle plate 25 being arranged on chassis and is arranged on the pallet 26 of accepting the table tennis of baffle plate 25 bounce-backs on bracing frame 1, described baffle plate 25 is arranged on the anterior position of transmitting aperture 101, described pallet 26 is arranged between baffle plate 25 and upper bulb 21, baffle plate 25 is obliquely installed, its lower one end is near upper bulb 21, the cross section of described baffle plate 25 is V-type, and the V-type bottom of described baffle plate 25 is corresponding with the goal hole 211 on upper bulb 21 sidewalls.
On support frame as described above 1, be provided with chute 102, described robot machine structure comprises the hammer 4 that is arranged on chute 102, be arranged on elastomeric element on bracing frame 1, for the fixed part of secures resilient member one end, for promoting the compressing mechanism of hammer 4 elasticity of compression parts and for limiting the position-limit mechanism of hammer 4 transmitting sites, described hammer 4 moves along chute 102, and hammer 4 and elastomeric element are on same axis.Elastomeric element in the present embodiment is spring 8, and fixed part is spring housing 7, can be also other elastomeric element, as air bag, rubber components etc., described spring 8 is front end near one end of hammer 4, and the other end is end, and the end of described spring 8 is arranged in spring housing 7.
Described compressing mechanism comprises by cylinder block 13 and is fixed on lateral cylinder 14 on bracing frame 1, is arranged on hammer 4 away from the STATEMENT OF FEDERALLY SPONSORED 18 that horizontal bolt 2 is connected with lateral cylinder 14 with one end, the other end is connected with horizontal bolt 2 of spring 8 one end, the setting vertical with STATEMENT OF FEDERALLY SPONSORED 18 of described horizontal bolt 2, described horizontal bolt 2 moves along chute 102.
Described hammer 4 tops are provided with position-limit mechanism, described position-limit mechanism comprises the trigger cylinder 6 being arranged on spring housing 7, be arranged on the top iron 5 of trigger cylinder 6 the axis of the pistons and be arranged on the sear 3 on bracing frame 1, described sear 3 is arranged on bracing frame 1 by bearing pin, sear 3 can rotate around bearing pin under the effect of external force, described top iron 5 moves upward for limiting sear 3, on described sear 3, be provided with limiting section 31, on described hammer 4, be provided with the stopper slot 41 coordinating with limiting section 31, described limiting section 31 is inclined-plane with sear 3 connecting portions, on described stopper slot 41, there is the inclined-plane matching with the inclined-plane of limiting section 31, facilitate stopper slot 41 to enter limiting section 31 or exit limiting section 31.
On support frame as described above 1, be also provided with the governor motion for the elastic force of regulating spring 1, described governor motion comprises the screw rod 10, the nut 9 coordinating with screw rod 10 that are arranged on bracing frame side plate 11, be fixed on gear wheel 17 on screw rod 10, with pinion wheel 16 and the servomotor 15 of gear wheel 17 engagements, described servomotor 15 is fixed on side plate 11, described pinion wheel 16 is arranged on the main shaft of servomotor 15, and one end of described nut 9 is inserted in spring housing 7 and is connected with spring 8 ends.
The bottom of described frame 24 is provided with adjusting bolt 29, for regulating the planarization of frame 24, when the holding plane out-of-flatness of frame 24, adjusts the stability of frame 24 by adjusting bolt 29, prevents that frame 24 from rocking and affecting the placement of table tennis.
Described speed measuring device 27 is arranged on the lateral location in service 101 the place aheads, hole, and described speed measuring device 27 is arranged on bracing frame 1.Described speed measuring device 27 test tablees tennis 28 are launched the speed of moment, and note down.
The principle of work of table tennis proving installation described in the utility model is:
Table tennis 28 moves up under the effect of push-plate 20, enter service hole 102, the piston of cylinder 14 is toward retraction, pull STATEMENT OF FEDERALLY SPONSORED 18 to move right, hammer 4 slides to the right along chute 102 under the effect of horizontal bolt 2, spring 8 is compressed, when hammer 4 moves to the position of sear 3, sear 3 moves upward under the promotion of hammer 4, when sear 3 moves up to top iron 5 positions, stop mobile, now, the limiting section 31 of sear 3 coordinates with the stopper slot 41 of hammer 4, hammer 4 is stuck in to this position, complete the process of spring energy-storage, cylinder 14 drives horizontal bolt 2 to left movement by STATEMENT OF FEDERALLY SPONSORED 18, reset.When the piston driving top of trigger cylinder 6 iron 5 moves right, the obstruction that sear 3 has lost top iron 5 moves upward, the limiting section 31 of sear 3 is separated with the stopper slot 41 of hammer 4, under the effect of spring 8, hammer 4 slides left fast, table tennis 28 is hit, table tennis 28 is encountered baffle plate 25 toward resilience, enter pallet 26, because pallet 26 is obliquely installed, table tennis 28 enters on the push-plate 20 in upper bulb 21 from the goal hole 221 of upper bulb, and upper ball cylinder 19 promotes push-plate 20 and moves up, table tennis 28 is pushed to service hole 102, wait for test next time.When table tennis 28 is launched, the speed of 27 pairs of tablees tennis 28 of speed measuring device is tested, and record.
If the speed of table tennis 28 does not meet testing standard, can control by speed governing governor motion the emission rate of table tennis 28, servomotor 15 driving pinions 16, drive gear wheel 17 rotate, thereby drive screw rod 10 to rotate, nut 9 moves under the effect of screw rod 10, adjusts the reference position of spring 7, by the force of compression of control spring 7, control the sliding velocity of hammer 4, thereby control the emission rate of table tennis 28.
The utility model adopts spring for accumulating energy, promotes hammer, thus transmitting table tennis, the velocity-stabilization of table tennis transmitting during test, and can be according to test request regulating spring force of compression, thereby the emission rate of controlling table tennis, the setting of speed measuring device, makes test result more accurate.The utility model test result is accurate, testing efficiency is high, full automatic control, has saved human resources.
Described in the present embodiment, other structure of table tennis proving installation is referring to prior art.
The above, it is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, therefore every, do not depart from technical solutions of the utility model content, any modification, equivalent variations and the modification above embodiment done according to technical spirit of the present utility model, all still belong in the scope of technical solutions of the utility model.
Claims (10)
1. a table tennis proving installation, comprise frame, table tennis placement mechanism, robot machine structure and table tennis recovering mechanism, in described frame, be provided with bracing frame, support frame as described above comprises base plate and side plate, it is characterized in that: on support frame as described above, be provided with chute;
Described table tennis placement mechanism comprises the push-plate on upper bulb, the longitudinal cylinder being arranged in frame and the axis of the piston that is arranged on longitudinal cylinder, and described push-plate is arranged on promotion table tennis in bulb and moves upward, and described upper bulb sidewall is provided with goal mouth; On support frame as described above, be provided with service hole, described service hole is arranged on bulb top;
Described table tennis penetrate mechanism comprise the hammer being arranged on bracing frame, the elastomeric element being connected with hammer, for the fixed part of fixing elastic component one end, promote the compressing mechanism of hammer elasticity of compression parts and for limiting the position-limit mechanism of hammer transmitting site; Described hammer is along runner movement, and described hammer, compression member are arranged on same axis;
Described table tennis recovering mechanism comprises the pallet that is arranged on the baffle plate in service the place ahead, hole and is arranged on the table tennis of accepting baffle plate bounce-back on bracing frame, described pallet is arranged between baffle plate and upper bulb, described pallet is provided with ball mouth, and described ball mouth is corresponding with the goal mouth of upper bulb.
2. table tennis proving installation according to claim 1, it is characterized in that: described compressing mechanism comprises the lateral cylinder being horizontally installed on bracing frame, be arranged on hammer away from the horizontal bolt of elastomeric element one end, one end connects lateral cylinder, one end connects the STATEMENT OF FEDERALLY SPONSORED of horizontal bolt in addition, described horizontal bolt is vertical with STATEMENT OF FEDERALLY SPONSORED to be arranged, and described horizontal bolt is along runner movement.
3. table tennis proving installation according to claim 2, it is characterized in that: described position-limit mechanism comprises the trigger cylinder that is arranged on fixed part, is arranged on the top iron on trigger cylinder the axis of the piston and is movably connected in the sear on bracing frame with bearing pin, on described sear, is provided with limiting section.
4. table tennis proving installation according to claim 3, is characterized in that: on described hammer, be provided with the stopper slot coordinating with the limiting section of sear, described stopper slot and limiting section are provided with the inclined-plane cooperatively interacting.
5. table tennis proving installation according to claim 2, is characterized in that: described elastomeric element is spring, and described fixed part is spring housing, and described spring is front end near hammer one end, and the other end is end, and described spring end is arranged in spring housing.
6. table tennis proving installation according to claim 5, it is characterized in that: described spring end is provided with the governor motion of regulating spring power, described governor motion comprises nut and the screw rod coordinating with nut, spring housing and spring end are inserted in described nut one end, and described screw rod is arranged on the side plate of bracing frame.
7. table tennis proving installation according to claim 6, it is characterized in that: described governor motion also comprises driving mechanism, described driving mechanism comprises the servomotor on the side plate that is fixed on bracing frame, gear wheel, described gear wheel and the screw rod secure fit that is arranged on the pinion wheel on servomotor spindle and meshes with pinion wheel.
8. table tennis proving installation according to claim 1, is characterized in that: the cross section of described pallet is V-type, and described pallet is obliquely installed, and described pallet is lower near one end of upper bulb, and its one end near baffle plate arranges compared with highland.
9. according to table tennis proving installation described in claim 1 to 8 any one, it is characterized in that: also comprise for testing the speed measuring device of table tennis emission rate, described speed measuring device is arranged on the position of service side, the place ahead, hole.
10. table tennis proving installation according to claim 9, is characterized in that: described frame bottom is provided with for adjusting the adjusting bolt of its bottom surface flatness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420153164.3U CN203785974U (en) | 2014-03-31 | 2014-03-31 | Table tennis ball testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420153164.3U CN203785974U (en) | 2014-03-31 | 2014-03-31 | Table tennis ball testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203785974U true CN203785974U (en) | 2014-08-20 |
Family
ID=51322151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420153164.3U Expired - Lifetime CN203785974U (en) | 2014-03-31 | 2014-03-31 | Table tennis ball testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203785974U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108042990A (en) * | 2018-02-09 | 2018-05-18 | 华北理工大学 | A kind of table tennis ball for training and its molding machine |
| CN111829911A (en) * | 2020-07-14 | 2020-10-27 | 北京建筑材料科学研究总院有限公司 | Performance measuring device for filling leveling layer on floating ground |
-
2014
- 2014-03-31 CN CN201420153164.3U patent/CN203785974U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108042990A (en) * | 2018-02-09 | 2018-05-18 | 华北理工大学 | A kind of table tennis ball for training and its molding machine |
| CN108042990B (en) * | 2018-02-09 | 2022-12-13 | 华北理工大学 | Table tennis for training and forming device thereof |
| CN111829911A (en) * | 2020-07-14 | 2020-10-27 | 北京建筑材料科学研究总院有限公司 | Performance measuring device for filling leveling layer on floating ground |
| CN111829911B (en) * | 2020-07-14 | 2021-11-26 | 北京建筑材料科学研究总院有限公司 | Performance measuring device for filling leveling layer on floating ground |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104715655B (en) | Higher mathematics demonstration device for probability | |
| CN205067040U (en) | A vibrating device for instrument vibration testing | |
| CN203785974U (en) | Table tennis ball testing device | |
| CN110076097A (en) | A kind of mark sorting machine people of assembly line | |
| CN204746898U (en) | Sorting device of automobile shock absorber ware base | |
| US20130140053A1 (en) | Post driver with limited movement floating post anvil | |
| CN108918314A (en) | A kind of impact abrasion testing equipment that can simulate the grains of sand and high temperature complex environment | |
| CN104515668A (en) | Ejection-type horizontal impact platform driven by air pressure | |
| CN102735412B (en) | Bearing vibration measurement machine | |
| CN202075113U (en) | Hailstone striking test machine | |
| CN205067041U (en) | A cyclic delivery positioner for instrument vibration testing | |
| CN204330275U (en) | A kind of air pressure drives ejection type horizontal impact platform | |
| CN204537550U (en) | Higher mathematics demonstration device for probability | |
| CN103234845A (en) | Automatic impact-resistant experiment instrument for concrete and mortar | |
| CN215931225U (en) | Detection equipment for impact test | |
| CN104198137A (en) | Automobile seat bumping and wriggling testing device | |
| CN203745319U (en) | Looseness resistance performance testing device for bituminous mixture | |
| CN208872608U (en) | A kind of drop hammer impact testing machine | |
| CN204490041U (en) | A kind of novel feeding machine | |
| CN204375273U (en) | A kind of horizontal cast movement demonstration instrument | |
| CN203714766U (en) | Automatic spring vertical uprighting mechanism system | |
| CN108225707B (en) | Launching device and method for geotechnical engineering slope dangerous rockfall field test | |
| CN209069544U (en) | A kind of on-line vibration test device | |
| CN211179372U (en) | Falling ball experiment testing device | |
| CN214502904U (en) | Automobile chassis detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140820 |
|
| CX01 | Expiry of patent term |