CN114354374A - Sports ground surface layer material testing device - Google Patents
Sports ground surface layer material testing device Download PDFInfo
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- CN114354374A CN114354374A CN202210275249.8A CN202210275249A CN114354374A CN 114354374 A CN114354374 A CN 114354374A CN 202210275249 A CN202210275249 A CN 202210275249A CN 114354374 A CN114354374 A CN 114354374A
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Abstract
The invention discloses a surface layer material testing device for a sports field, which specifically comprises: the test board comprises a test board, wherein both ends of the top of the test board are fixedly connected with a fixed frame, the inner wall of the fixed frame is fixedly connected with a lifting rod, and one end of the lifting rod, which is far away from the fixed frame, is fixedly connected with a fixed seat; the detection device is arranged at the center of the top of the test board, and the bottom of the detection device is fixedly connected with the test board; the detection device includes: the invention relates to the technical field of playground surface layer material testing, in particular to a positioning plate, wherein an arc-shaped sliding hole is formed in the side surface of the positioning plate, and an arc-shaped slide way is fixedly connected to the part, located above the arc-shaped sliding hole, of one side of the positioning plate. This stadium ground surface layer material testing arrangement can carry out the extrusion of a plurality of angles to the material that awaits measuring, and the test more laminates the in-service use condition, and the test result is more accurate to convenient freely adjust test condition, the tolerance degree of the material that awaits measuring under the testable different pressures.
Description
Technical Field
The invention relates to the technical field of surface layer material testing of sports grounds, in particular to a surface layer material testing device of a sports ground.
Background
The sports ground is the best place for exercising body, the surface of the sports ground is generally paved with a rubber track to enhance the friction between the ground and the sporter, and the plastic track is also called as an all-weather track for track and field sports, and is composed of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM rubber particles or PU particles, pigment, auxiliary agent and filler. At present, a testing device used in the production and manufacturing processes of a plastic runway only performs simple reciprocating extrusion testing on the surface of a material generally, and during actual use, the runway needs to be extruded at a plurality of angles, so that the detection cannot be actually attached, and the accuracy of a testing result is poor.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a testing device for a surface layer material of a sports field, which solves the problems that the testing device used in the production and manufacturing process of the existing plastic track only performs simple reciprocating extrusion test on the surface of the material, and the track is required to be extruded by a plurality of angles during actual use, so that the detection cannot be actually attached, and the accuracy of the test result is poor.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a sports ground surface layer material testing device specifically includes:
the test board comprises a test board, wherein both ends of the top of the test board are fixedly connected with a fixed frame, the inner wall of the fixed frame is fixedly connected with a lifting rod, and one end of the lifting rod, which is far away from the fixed frame, is fixedly connected with a fixed seat;
the detection device is arranged at the center of the top of the test board, and the bottom of the detection device is fixedly connected with the test board;
the detection device includes:
the side surface of the positioning plate is provided with an arc-shaped sliding hole, and the part of one side of the positioning plate, which is positioned above the arc-shaped sliding hole, is fixedly connected with an arc-shaped slideway;
one side of the rotating rod is rotatably connected with the side surface of the positioning plate through a rotating seat, one end of the rotating rod extends to the side surface of the arc-shaped sliding hole and is fixedly connected with a connecting support rod, and one end, far away from the rotating rod, of the connecting support rod penetrates through the arc-shaped sliding hole and the arc-shaped slideway and extends into the arc-shaped slideway;
the top of the extrusion head is fixedly connected with a sliding seat, the sliding seat is arranged in the arc-shaped slideway and is in sliding connection with the inner wall of the arc-shaped slideway, and one side of the sliding seat is fixedly connected with the rotating rod;
one side of the telescopic push rod is fixedly connected with the positioning plate, and one end of the telescopic push rod is rotatably connected with a sliding sleeve.
Be provided with detection device, will wait to detect the material and place on the testboard during use, it compresses tightly its fixed column on the material that awaits measuring to drive the fixing base through the lifter extension, then drive slip cap reciprocating motion through flexible push rod, the slip cap drives the dwang when gliding on the dwang and revolutes the seat and rotate, the dwang tip can drive the sliding seat through connecting branch and at the inside reciprocating sliding of arc slide, the sliding seat can drive the extrusion head and rotate the extrusion on the material that awaits measuring, make the extrusion head can carry out the extrusion of a plurality of angles to the material that awaits measuring, the test more laminates the in-service behavior, the test result is more accurate.
Preferably, the bottom of the positioning plate is fixedly connected with the top of the test board, and the side face of the arc-shaped slideway is provided with a sliding hole matched with the connecting support rod.
Preferably, the sliding sleeve is sleeved at one end of the rotating rod, which is far away from the connecting supporting rod, and is in sliding connection with the rotating rod.
Preferably, the extrusion head comprises a telescopic sleeve, sliding holes are formed in two sides of the telescopic sleeve, an extrusion block is connected to the inner wall of the telescopic sleeve in a sliding manner, a sliding ring is sleeved and connected to the outer side of the telescopic sleeve in a sliding manner, a connecting rod is fixedly connected to the inner wall of the sliding ring, one end, away from the sliding ring, of the connecting rod is fixedly connected with the extrusion block through the sliding holes, a threaded sleeve is rotatably connected to the bottom of the sliding ring, a push rod is connected to the bottom of the extrusion block through an extrusion spring, one end, away from the extrusion spring, of the push rod extends to the outer portion of the telescopic sleeve and is fixedly connected with a pressing seat, the extrusion head is arranged, when the pressing force on the detection material needs to be adjusted, the threaded sleeve is rotated, the threaded sleeve longitudinally moves under the pushing of threads while rotating on the telescopic sleeve, the extrusion block is driven to slide in the telescopic sleeve through the connecting rod, and the extrusion block longitudinally moves relative to the push rod, can change the push force that ejector pin and pressure seat received through extrusion spring to change and press the seat to the extrusion force of material to be tested, the convenient test condition of freely adjusting can test the tolerance degree of material to be tested under the different pressure.
Preferably, the top of the telescopic sleeve is fixedly connected with the bottom of the sliding seat, and the threaded sleeve is sleeved on the telescopic sleeve and is in sliding connection with the telescopic sleeve.
Preferably, the top of the extrusion spring is rotatably connected with the bottom of the extrusion block, and the bottom of the extrusion spring is fixedly connected with the top of the ejector rod.
Preferably, the pressing seat comprises a pressing block, the bottom of the pressing block is fixedly connected with an arc-shaped pressing plate, a pressure cavity is formed in the pressing block, extrusion holes are formed in two sides of the pressure cavity, an extrusion piston is connected to the inner wall of each extrusion hole in a sliding manner, a control spring is fixedly connected to one side of the extrusion piston, an extrusion sleeve is communicated with the side face of the pressure cavity, a thrust piston is connected to the inner wall of the extrusion sleeve in a sliding manner, the pressing seat is arranged, when the pressing seat is used, the pressing seat is pressed on the surface of a material to be tested under the action of the extrusion force of the ejector rod, the arc-shaped pressing plate is arranged in the pressing seat, when the arc-shaped pressing plate rolls on the surface of the material to be tested, the extrusion angles of different positions at the bottom of the arc-shaped pressing plate to the surface of the material to be tested are different, the arc-shaped pressing plate can be used for extruding a region at different angles, and extrusion results at different angles can be conveniently obtained in one extrusion test, the testing efficiency is higher.
Preferably, the top of the pressing block is fixedly connected with the bottom of the ejector rod, and the bottom of the arc-shaped pressing plate is provided with friction grains.
Preferably, the one end that extrusion piston was kept away from to control spring extends to the extrusion hole outside and with arc clamp plate tip fixed connection, thrust piston's piston rod and extrusion sleeve's tip inner wall threaded connection are provided with pressure chamber and extrusion hole, because the both ends of foot are great to the pressure on stadium surface when the people walks, the accessible rotates thrust piston, thrust piston removes inside extrusion sleeve, electronic extrusion sleeve and the inside hydraulic oil of pressure chamber remove, hydraulic oil promotes the extrusion piston removal and the extrusion control spring of extrusion hole inside, improve the pressure of control spring to arc clamp plate tip, arc clamp plate tip warp and increase the pressure to the material that awaits measuring under the drive of pressure, the convenient simulation really steps on the pressure.
(III) advantageous effects
The invention provides a surface layer material testing device for a sports ground. The method has the following beneficial effects:
(1) this stadium ground surface layer material testing arrangement, be provided with detection device, will wait to detect the material and place on the testboard during use, it compresses tightly its fixed column on the material that awaits measuring to drive the fixing base through the lifter extension, then drive slip cap reciprocating motion through telescopic push rod, the slip cap drives the dwang when gliding on the dwang and revolutes the seat rotation, the dwang tip can drive the sliding seat through connecting branch and at the inside reciprocating sliding of arc slide, the sliding seat can drive the extrusion head and rotate the extrusion on the material that awaits measuring, make the extrusion head can carry out the extrusion of a plurality of angles to the material that awaits measuring, the test more laminates the in-service use condition, the test result is more accurate.
(2) This stadium ground surface layer material testing arrangement, be provided with the extrusion head, when the packing force to detecting material is adjusted to needs, rotate the thread bush, the thread bush is longitudinal movement under the promotion of screw thread when the pivoted on the telescopic sleeve, drive the extrusion piece through the connecting rod and slide in telescopic sleeve inside, the relative ejector pin longitudinal movement of extrusion piece, can change the ejector pin through the extrusion spring and press the thrust that the seat received, thereby change the extrusion force of pressing the seat to the material to be tested, convenient free regulation test condition, the tolerance degree of the material to be tested under the testable different pressure.
(3) This stadium ground surface layer material testing arrangement, be provided with and press the seat, press the seat to receive the extrusion force of ejector pin during use, make and press the seat to compress tightly on the material surface that awaits measuring, press the inside arc clamp plate that is provided with of seat, when the arc clamp plate rolls on the material surface that awaits measuring, the different positions of arc clamp plate bottom are all inequality to the extrusion angle on the material surface that awaits measuring, accessible arc clamp plate carries out the extrusion of different angles to an area, the convenience obtains the extrusion result of different angles in an extrusion test, efficiency of software testing is higher.
(4) This sports ground surface layer material testing arrangement, be provided with pressure chamber and extrusion hole, because the both ends of foot are great to the pressure on stadium surface when the people walks, the accessible rotates the thrust piston, the thrust piston removes at extrusion sleeve inside, electronic extrusion sleeve and the inside hydraulic oil of pressure chamber remove, hydraulic oil promotes the extrusion piston removal and the extrusion control spring of extrusion downthehole portion, improve the pressure of control spring to arc clamp plate tip, arc clamp plate tip warp and increase the pressure to the material to be measured under the drive of pressure, the convenient simulation is really stepped on and is pressed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic structural diagram of a detecting device according to the present invention;
FIG. 4 is a schematic view of the extrusion head of the present invention;
FIG. 5 is a schematic view of a pressing base according to the present invention.
In the figure: 1. a test bench; 2. a fixed mount; 3. a lifting rod; 4. a fixed seat; 5. a detection device; 51. positioning a plate; 52. an arc-shaped slide hole; 53. an arc-shaped slideway; 54. rotating the rod; 55. connecting a support rod; 56. an extrusion head; 561. a telescopic sleeve; 562. a slide hole; 563. extruding the block; 564. a sliding ring; 565. a connecting rod; 566. a threaded sleeve; 567. a top rod; 568. pressing a base; 569. a compression spring; 5681. briquetting; 5682. an arc-shaped pressing plate; 5683. a pressure chamber; 5684. extruding the hole; 5685. a squeeze piston; 5686. a control spring; 5687. extruding the sleeve; 5688. a thrust piston; 57. a sliding seat; 58. a telescopic push rod; 59. a sliding sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-3, the present invention provides a technical solution: a sports ground surface layer material testing device specifically includes:
the test board comprises a test board 1, wherein both ends of the top of the test board 1 are fixedly connected with a fixed frame 2, the inner wall of the fixed frame 2 is fixedly connected with a lifting rod 3, and one end of the lifting rod 3, far away from the fixed frame 2, is fixedly connected with a fixed seat 4;
the detection device 5 is arranged at the center of the top of the test board 1, and the bottom of the detection device 5 is fixedly connected with the test board 1;
the detection device 5 includes:
the positioning plate 51 is provided with an arc-shaped sliding hole 52 on the side surface of the positioning plate 51, and an arc-shaped slideway 53 is fixedly connected to the part of one side of the positioning plate 51, which is positioned above the arc-shaped sliding hole 52;
one side of the rotating rod 54 is rotatably connected with the side surface of the positioning plate 51 through a rotating seat, one end of the rotating rod 54 extends to the side surface of the arc-shaped sliding hole 52 and is fixedly connected with a connecting support rod 55, and one end, far away from the rotating rod 54, of the connecting support rod 55 penetrates through the arc-shaped sliding hole 52 and the arc-shaped slideway 53 and extends into the arc-shaped slideway 53;
the top of the extrusion head 56 is fixedly connected with a sliding seat 57, the sliding seat 57 is arranged inside the arc-shaped slideway 53 and is in sliding connection with the inner wall of the arc-shaped slideway 53, and one side of the sliding seat 57 is fixedly connected with the rotating rod 54;
one side of the telescopic push rod 58 is fixedly connected with the positioning plate 51, and one end of the telescopic push rod 58 is rotatably connected with a sliding sleeve 59.
The bottom of the positioning plate 51 is fixedly connected with the top of the test board 1, and the side surface of the arc-shaped slideway 53 is provided with a sliding hole matched with the connecting support rod 55.
The sliding sleeve 59 is sleeved on one end of the rotating rod 54 far away from the connecting support rod 55 and is connected with the rotating rod 54 in a sliding manner.
Be provided with detection device 5, to wait to detect the material and place on testboard 1 during the use, it compresses tightly its fixed column on the material that awaits measuring to drive fixing base 4 through the extension of lifter 3, then drive sliding sleeve 59 reciprocating motion through telescopic push rod 58, sliding sleeve 59 drives dwang 54 and revolutes the seat rotation when sliding on dwang 54, dwang 54 tip can drive sliding seat 57 at the inside reciprocating sliding of arc slide 53 through connecting branch 55, sliding seat 57 can drive extrusion head 56 and rotate the extrusion on the material that awaits measuring, make extrusion head 56 can carry out the extrusion of a plurality of angles to the material that awaits measuring, the test more laminates the in-service use condition, the test result is more accurate.
Example two:
referring to fig. 1-4, the present invention provides a technical solution based on the first embodiment: the extrusion head 56 comprises a telescopic sleeve 561, both sides of the telescopic sleeve 561 are provided with slide holes 562, the inner wall of the telescopic sleeve 561 is slidably connected with an extrusion block 563, the outer side of the telescopic sleeve 561 is sleeved and slidably connected with a slide ring 564, the inner wall of the slide ring 564 is fixedly connected with a connecting rod 565, one end of the connecting rod 565 far away from the slide ring 564 is fixedly connected with the extrusion block 563 through the slide hole 562, the bottom of the slide ring 564 is rotatably connected with a threaded sleeve 566, the bottom of the extrusion block 563 is connected with a push rod 567 through an extrusion spring 569, one end of the push rod 567 far away from the extrusion spring 569 extends to the outside of the telescopic sleeve 561 and is fixedly connected with a press seat 568, the top of the telescopic sleeve 561 is fixedly connected with the bottom of the slide seat 57, the threaded sleeve 566 is sleeved on the telescopic sleeve 561 and is slidably connected with the telescopic sleeve 561, the top of the extrusion spring 569 is rotatably connected with the bottom of the extrusion block 563, the bottom of the extrusion spring 569 is fixedly connected with the top of the push rod 567, the extrusion head 56 is arranged, when the pressing force on a detection material needs to be adjusted, the threaded sleeve 566 is rotated, the threaded sleeve 566 longitudinally moves under the pushing of threads while rotating on the telescopic sleeve 561, the extrusion block 563 is driven to slide in the telescopic sleeve 561 through the connecting rod 565, the extrusion block 563 longitudinally moves relative to the ejector rod 567, the pushing force applied to the ejector rod 567 and the pressure seat 568 can be changed through the extrusion spring 569, the extrusion force of the pressure seat 568 on the material to be tested is changed, the test condition can be conveniently and freely adjusted, and the tolerance degree of the material to be tested under different pressures can be tested.
Example three:
referring to fig. 1-5, the present invention provides a technical solution based on the first embodiment and the second embodiment: the pressure seat 568 comprises a pressure block 5681, an arc-shaped pressure plate 5682 is fixedly connected to the bottom of the pressure block 5681, a pressure cavity 5683 is formed in the pressure block 5681, extrusion holes 5684 are formed in two sides of the pressure cavity 5683, an extrusion piston 5685 is connected to the inner wall of each extrusion hole 5684 in a sliding mode, a control spring 5686 is fixedly connected to one side of each extrusion piston 5685, an extrusion sleeve 5687 is communicated with the side face of the pressure cavity 5683, a thrust piston 5688 is connected to the inner wall of each extrusion sleeve 5687 in a sliding mode, the top of the pressure block 5681 is fixedly connected with the bottom of a push rod 567, friction grains are formed in the bottom of the arc-shaped pressure plate 5682, one end, far away from the extrusion piston 5685, of the control spring 5686 extends to the outside of each extrusion hole 5684 and is fixedly connected with the end of the arc-shaped pressure plate 5682, a piston rod of the thrust piston 5688 is in threaded connection with the inner wall of the end of the extrusion sleeve 5687, a pressure seat 568 is arranged, the pressure seat 568 is pressed by the extrusion force of the push rod 567 during use, the pressure seat 568 is pressed on the surface of a material to be tested, the arc-shaped pressure seat 568 is arranged in the pressure seat, when the arc-shaped pressing plate 5682 rolls on the surface of a material to be tested, the extrusion angles of different positions at the bottom of the arc-shaped pressing plate 5682 to the surface of the material to be tested are different, the arc-shaped pressing plate 5682 can extrude an area at different angles, extrusion results at different angles can be conveniently obtained in one extrusion test, the test efficiency is high, a pressure cavity 5683 and an extrusion hole 5684 are arranged, as the pressure of two ends of feet to the surface of a sports ground is high when people walk, the thrust piston 5688 can be rotated to move in the extrusion sleeve 5687, hydraulic oil in the electric extrusion sleeve 5687 and the pressure cavity 5683 can move, the hydraulic oil can push the extrusion piston 5685 in the extrusion hole 5684 to move and extrude the control spring 5686, the pressure of the control spring 5686 to the end of the arc-shaped pressing plate 5682 is improved, the end of the arc-shaped pressing plate 5682 is driven by the pressure to deform and increase the pressure to the material to be tested, the real treading is conveniently simulated.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.
Claims (9)
1. A sports ground surface layer material testing device specifically includes:
the test bed comprises a test bed (1), wherein both ends of the top of the test bed (1) are fixedly connected with fixing frames (2), the inner walls of the fixing frames (2) are fixedly connected with lifting rods (3), and one ends, far away from the fixing frames (2), of the lifting rods (3) are fixedly connected with fixing seats (4);
the detection device (5) is arranged at the center of the top of the test board (1), and the bottom of the detection device (5) is fixedly connected with the test board (1);
this stadium surface layer material testing arrangement's characterized in that: the detection device (5) comprises:
the positioning plate (51), the side of the positioning plate (51) is provided with an arc-shaped sliding hole (52), and the part of one side of the positioning plate (51) above the arc-shaped sliding hole (52) is fixedly connected with an arc-shaped slideway (53);
one side of the rotating rod (54) is rotatably connected with the side face of the positioning plate (51) through a rotating seat, one end of the rotating rod (54) extends to the side face of the arc-shaped sliding hole (52) and is fixedly connected with a connecting supporting rod (55), and one end, far away from the rotating rod (54), of the connecting supporting rod (55) penetrates through the arc-shaped sliding hole (52) and the arc-shaped sliding way (53) and extends into the arc-shaped sliding way (53);
the top of the extrusion head (56) is fixedly connected with a sliding seat (57), the sliding seat (57) is arranged inside the arc-shaped slideway (53) and is in sliding connection with the inner wall of the arc-shaped slideway (53), and one side of the sliding seat (57) is fixedly connected with the rotating rod (54);
one side of the telescopic push rod (58) is fixedly connected with the positioning plate (51), and one end of the telescopic push rod (58) is rotatably connected with a sliding sleeve (59).
2. The sports field surface layer material testing device of claim 1, wherein: the bottom of the positioning plate (51) is fixedly connected with the top of the test board (1), and the side face of the arc-shaped slideway (53) is provided with a sliding hole matched with the connecting support rod (55).
3. The sports field surface layer material testing device of claim 1, wherein: the sliding sleeve (59) is sleeved at one end, far away from the connecting support rod (55), of the rotating rod (54) and is in sliding connection with the rotating rod (54).
4. The sports field surface layer material testing device of claim 1, wherein: the extrusion head (56) comprises a telescopic sleeve (561), slide holes (562) are formed in two sides of the telescopic sleeve (561), an extrusion block (563) is connected to the inner wall of the telescopic sleeve (561) in a sliding mode, a sliding ring (564) is sleeved and connected to the outer side of the telescopic sleeve (561) in a sliding mode, a connecting rod (565) is fixedly connected to the inner wall of the sliding ring (564), one end, far away from the sliding ring (564), of the connecting rod (565) is fixedly connected with the extrusion block (563) through the slide holes (562), the bottom of the sliding ring (564) is rotatably connected with a threaded sleeve (566), an ejector rod (567) is connected to the bottom of the extrusion block (563) through an extrusion spring (569), and one end, far away from the extrusion spring (569), of the ejector rod (567) extends to the outside of the telescopic sleeve (561) and is fixedly connected with a pressure seat (568).
5. The sports field surface layer material testing device of claim 4, wherein: the top of the telescopic sleeve (561) is fixedly connected with the bottom of the sliding seat (57), and the threaded sleeve (566) is sleeved on the telescopic sleeve (561) and is in sliding connection with the telescopic sleeve (561).
6. The sports field surface layer material testing device of claim 4, wherein: the top of the extrusion spring (569) is rotatably connected with the bottom of the extrusion block (563), and the bottom of the extrusion spring (569) is fixedly connected with the top of the ejector rod (567).
7. The sports field surface layer material testing device of claim 4, wherein: the pressure seat (568) comprises a pressure block (5681), the bottom of the pressure block (5681) is fixedly connected with an arc-shaped pressure plate (5682), a pressure chamber (5683) is arranged inside the pressure block (5681), extrusion holes (5684) are arranged on two sides of the pressure chamber (5683), an extrusion piston (5685) is connected to the inner wall of each extrusion hole (5684) in a sliding mode, a control spring (5686) is fixedly connected to one side of the extrusion piston (5685), an extrusion sleeve (5687) is communicated to the side face of the pressure chamber (5683), and a thrust piston (5688) is connected to the inner wall of the extrusion sleeve (5687) in a sliding mode.
8. The sports field surface layer material testing device of claim 7, wherein: the top of the pressing block (5681) is fixedly connected with the bottom of the ejector rod (567), and friction grains are arranged at the bottom of the arc-shaped pressing plate (5682).
9. The sports field surface layer material testing device of claim 7, wherein: one end of the control spring (5686) far away from the extrusion piston (5685) extends to the outside of the extrusion hole (5684) and is fixedly connected with the end part of the arc-shaped pressure plate (5682), and a piston rod of the thrust piston (5688) is in threaded connection with the inner wall of the end part of the extrusion sleeve (5687).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210275249.8A CN114354374B (en) | 2022-03-21 | 2022-03-21 | Sports ground surface layer material testing device |
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| CN202210275249.8A CN114354374B (en) | 2022-03-21 | 2022-03-21 | Sports ground surface layer material testing device |
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| CN114354374B CN114354374B (en) | 2022-06-03 |
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| CN115876623A (en) * | 2022-12-27 | 2023-03-31 | 沭阳华瑞金属制品有限公司 | Motor casing local hardness detection device and detection method thereof |
| CN115931588A (en) * | 2023-03-10 | 2023-04-07 | 江苏西尔特橡胶股份有限公司 | Rubber fender tester for increasing testing stability |
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| Publication number | Publication date |
|---|---|
| CN114354374B (en) | 2022-06-03 |
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