CN204405515U - A kind of V belt translation formula rubber friction characteristic test system - Google Patents
A kind of V belt translation formula rubber friction characteristic test system Download PDFInfo
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- CN204405515U CN204405515U CN201520108710.6U CN201520108710U CN204405515U CN 204405515 U CN204405515 U CN 204405515U CN 201520108710 U CN201520108710 U CN 201520108710U CN 204405515 U CN204405515 U CN 204405515U
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- 238000013519 translation Methods 0.000 title claims abstract description 18
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- 244000137852 Petrea volubilis Species 0.000 claims description 4
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- 235000012489 doughnuts Nutrition 0.000 abstract description 4
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Abstract
The utility model discloses a kind of V belt translation formula rubber friction characteristic test system, primarily of fixture module (1), road surface power system (2) composition of support frame (3) and side fixed thereon, road surface travelling belt in road surface power system (2) moves under the drive of motor, hydraulic loaded cylinder in fixture module (1) is to rubber sample imposed load to be measured below it, make rubber sample and road surface travelling belt rubbing contact, and by pressure transducer, the pressure that rubber sample is subject to is gathered.The utility model can realize the measurement covering doughnut friction factor on rubber tire tread and road surface under various different operating mode.Truly can reflect doughnut and the road surface characteristic under various sliding velocity of different tread contour, overcome the restriction of traditional stand due to rubber size, sliding velocity, skidding distance etc.
Description
Technical field
The utility model belongs to tire tribology research field, is specifically related to a kind of V belt translation formula rubber friction characteristic test system, can be tire tread rubber material friction, polishing machine provides effective means of testing.Can be the rubbing characteristics measuring tire and road surface under friction speed simultaneously and platform is provided.
Background technology
Rubber is as the chief component of tire, and its rubbing characteristics is very special, and it does not also meet coulomb law of friction.The mechanical property of rubber tyre depends on the rubbing characteristics (especially under some limiting conditions) of rubber to a great extent.Still immature to the theoretical research of rubber friction at present.Therefore, the testing research of rubber friction is just very important to the research of mechanics of tire characteristic.
On the other hand, tire tread pattern, as raising automotive performance, guarantees the key factor of driving safety.Its effect is exactly the friction force between increase tyre surface and road surface, and to prevent wheel-slip, the effect of this and shoe sole print is exactly the same.Which increase tyre surface ground connection elasticity, between tyre surface and road surface tangential force (as driving force, damping force and transverse force) effect under, pattern block can produce larger tangential elastic deformation.Tangential force increases, and tangential deformation increases thereupon, and " friction effect " of surface of contact also just strengthens thereupon, and then inhibits tyre surface and slipperiness on roads or skidding trend.Therefore, the rubber friction characteristic research with relief features is quite important.
In order to study the rubbing characteristics of rubber, rubber friction platform common at present has two classes: rotating disc type and sliding desk type rubbing table.The rubbing table of rotating disc type, usually on the one hand by driven by motor rotating disk, comes the road surface of skimulated motion, and the rubber sample loaded by gravity, hydraulic pressure or electric cylinder is on the other hand contacted with rotating disk, realizes the process of friction, belongs to rotary motion; Sliding desk type testing table carrys out simulated roadway by the flat board between 1m to 5m, and the sliding motion of rubber is generally realized by line slideway, belongs to rectilinear motion.The exploitation of these equipment has promoted the progress of frictional theory largely, but some shortcomings of respective existence of these instruments:
Rotating disc type rubbing table test specimen size should not be larger, because rubber sample is when rotating disk slippage, the sliding velocity in interior outside is inconsistent, and rotating disk is less or test specimen size is larger, this phenomenon is more obvious, is difficult to test the experimental test with tread contour block rubber; Sliding desk type rubbing table sliding velocity, sliding displacement are less, and be subject to flat physical size restriction, the maximum friction speed of rubber is difficult to promote.Therefore, necessary proposition can in conjunction with the test macro of both advantages.
Utility model content
For the problems referred to above, the purpose of this utility model proposes a kind ofly can test the large scale block rubber with tread contour, and be applicable to the V belt translation formula rubber friction test macro of high sliding velocity, high skidding distance features (namely combining two kinds of friction stand advantages).
The utility model discloses a kind of V belt translation formula rubber friction characteristic test system, form primarily of fixture module 1, road surface power system 2 and support frame 3, described fixture module 1 is fixed on the upper frame 301 of support frame 3, road surface power system 2 is supported by the semi-girder framework 302 of support frame 3, and described semi-girder framework 302 is connected with the underframe 303 of support frame 3; Road surface travelling belt 205 in described road surface power system 2 moves under the drive of motor; Described fixture module 1 is positioned at the top of road surface travelling belt 205, wherein containing hydraulic loaded cylinder 102 and pressure transducer, described hydraulic loaded cylinder 102 is to rubber sample 107 imposed load to be measured below it, make rubber sample 107 and road surface travelling belt 205 rubbing contact, and by pressure transducer, the pressure that rubber sample 107 is subject to is gathered.
In described fixture module 1, hydraulic loaded cylinder 102 is fixed on upper frame 301 by the top board of holder 101, install the first line slideway 105 below hydraulic loaded cylinder 102, described rubber sample 107 is contained in accommodation box 106, and is slidably connected with the first line slideway 105; Described pressure transducer comprises pressure at right angle sensor 103 and horizontal pressure force sensor 108, wherein pressure at right angle sensor 103 is arranged between hydraulic loaded cylinder 102 and the first line slideway 105, horizontal pressure force sensor 108 one end is connected with the side plate of holder 101, and the other end is connected with accommodation box 106.
Between described hydraulic loaded cylinder 102 and the first line slideway 105, pressure at right angle sensor 103 both sides are provided with guide bars 104.
Described road surface power system 2 forms primarily of buncher 201, initiative drive shaft 207 and active rotary drum 204, road surface travelling belt 205, slave drive axle 211 and the driven rotary drum 215 be arranged on slave drive axle 211 be arranged on initiative drive shaft 207; Described road surface travelling belt 205 is arranged on also tensioning on active rotary drum 204 and driven rotary drum 215, and power is delivered to initiative drive shaft 207 by driving belt 202 by described buncher 201, and then drives road surface travelling belt 205 to move.
Described initiative drive shaft 207 two ends support respectively by the first bearing 203 and the second bearing 208, and be directly fixedly mounted on semi-girder framework 302, slave drive axle 211 two ends support respectively by three abutments 210 and the 4th bearing 214, and on the second line slideway 212 be slidably mounted on semi-girder framework 302 and the 3rd line slideway 216; Parallel between described active rotary drum 204 with driven rotary drum 215 first electric cylinder 209 and the second electric cylinder 213 is installed, described first electric cylinder 209 and second electric cylinder 213 one end are separately fixed on semi-girder framework 302, and the other end is connected with three abutments 210 and the 4th bearing 214 respectively.
Described underframe 303 is provided with image capture instrument 206, for detecting the relative displacement of road surface travelling belt 205 and active rotary drum 204.
Described first bearing 203 and the second bearing 208 inside are cylindrical bearing, and three abutments 210 inside is ball pivot and sliding bearing assembly, and the 4th bearing 214 inside is ball pivot.
Described semi-girder framework 302 is equipped with plane thrust bearing 217, and described plane thrust bearing 217 is positioned at below road surface travelling belt 205, and just to hydraulic loaded cylinder 102.
Described road surface travelling belt 205 material is steel, it posts the sand paper of different brackets, to simulate the road surface of different attachment.
The beneficial effects of the utility model are: the utility model combines the advantage of rotating disc type and guide tracked friction stand.Can realize covering the measurement of doughnut friction factor on (comprise tyre surface pressure under various tread-rubber, tread contour, various load, sliding velocity, different road surfaces rubber tyre) when driving braking tyre surface and road surface under various different operating mode.Truly can reflect doughnut and the road surface characteristic under various sliding velocity of different tread contour, overcome the restriction of traditional stand due to rubber size, sliding velocity, skidding distance etc.
Accompanying drawing explanation
Fig. 1 is system architecture stereographic map of the present utility model;
Fig. 2 is system architecture front view of the present utility model;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the structural representation of support frame in the utility model;
Fig. 5 is the front view of fixture module in the utility model;
In figure:
1 fixture module; 101 holders; 102 hydraulic loaded cylinders; 103 pressure at right angle sensors; 104 guide bars; 105 first line slideways; 106 accommodation boxes; 107 rubber samples; 108 horizontal pressure force sensors;
2 road surface power systems;
201 bunchers; 202 driving belts; 203 first bearings; 204 active rotary drums; 205 road surface travelling belts; 206 image capture instruments; 207 initiative drive shafts; 208 second bearings; 209 first electric cylinders; 210 three abutments; 211 slave drive axles; 212 second line slideways; 213 second electric cylinders; 214 the 4th bearings; 215 driven rotary drums; 216 the 3rd line slideways; 217 plane thrust bearings;
3 support frames;
301 upper frames; 302 semi-girder frameworks; 303 underframes.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1, test macro disclosed in the utility model forms primarily of fixture module 1, road surface power system 2 and support frame 3.Wherein fixture module 1 is fixedly mounted on the below of the upper frame 301 of support frame 3, and road surface power system 2 is arranged on inside support frame 3.
As shown in Figure 4, support frame 3 comprises upper frame 301, semi-girder framework 302 and underframe 303.Upper frame 301 is fixed on above underframe 303, semi-girder framework 302 and underframe 303 bolt are fixed, semi-girder framework 302 be cantilever on support frame 3, simultaneously semi-girder framework 302 is installed with road surface power system 2 and is connected, and for supporting whole road surface power system 2.
As shown in Figure 5, described fixture module 1 comprises holder 101; Hydraulic loaded cylinder 102; Pressure at right angle sensor 103; Guide bars 104; First line slideway 105; Rubber sample accommodation box 106; Rubber sample 107; Horizontal pressure force sensor 108.Wherein, holder 101 one-tenth inverted "L" shaped, fix with upper frame 301 on the upside of its top, fix with hydraulic loaded cylinder 102 on the downside of holder 101 top, first line slideway 105 is positioned at below hydraulic loaded cylinder 102, pressure at right angle sensor 103 and guide bars 104 are installed between hydraulic loaded cylinder 102 and the first line slideway 105, and guide bars 104 mounted in pairs is in pressure at right angle sensor 103 both sides.Rubber sample accommodation box 106 is positioned at below the first line slideway 105, and horizontal rectilinear motion can be carried out relative to the first line slideway 105, rubber sample accommodation box 106 is built with figuratum rubber sample 107, horizontal pressure force sensor 108 left end is connected with holder 101 sidewall, and right-hand member is connected with rubber sample accommodation box 106.
When measuring, rubber sample 107 in the vertical direction imposed load given by hydraulic loaded cylinder 102, makes rubber sample 107 and road surface travelling belt 205 contact friction, produces pressure at right angle, and measured by pressure at right angle sensor 103.
Alternatively, described hydraulic loaded cylinder 102 is servo electricity cylinder or air pressure-loading cylinder.
Now, because horizontal pressure force sensor 108 is connected with holder 101 and rubber sample accommodation box 106 respectively, it can record rubber sample 107 and tangential force during travelling belt 205 contact friction of road surface.
First line slideway 105 can horizontal rectilinear motion relative to rubber sample accommodation box 106, and the tangential force produced when rubber sample 107 and road surface travelling belt 205 can be rubbed is delivered on horizontal pressure force sensor 108, to ensure the accurate of horizontal tangential power.
Alternatively, described rubber sample 107 surface detail is transverse pattern, annular ribs, in length and breadth dual purpose tread pattern, cross-country tread pattern etc., also can be smooth unpatterned surface.
As shown in accompanying drawing 2,3, described road surface power system 2 comprises buncher 201; Driving belt 202; First bearing 203; Initiatively rotary drum 204; Road surface travelling belt 205; Image capture instrument 206; Initiative drive shaft 207; Second bearing 208; First electric cylinder 209; Three abutments 210; Slave drive axle 211; Second line slideway 212; Second electric cylinder 213; 4th bearing 214; Driven rotary drum 215; 3rd line slideway 216; Plane thrust bearing 217.
Described buncher 201 drives initiative drive shaft 207 to rotate by driving belt 202, initiative drive shaft 207 by the first bearing 203 and the second bearing 208 spacing fixing, initiatively rotary drum 204 is arranged on initiative drive shaft 207, and rotates with initiative drive shaft 207; 211, slave drive axle by three abutments 210 and the 4th bearing 214 spacing fixing, driven rotary drum 215 is arranged on slave drive axle 211, and rotates with driven transmission shaft 211.
Described first bearing 203, second bearing 208, three abutments 210 and the 4th bearing 214 carry the weight of road surface power system 2.Wherein the first bearing 203 and the second bearing 208 are directly fixed on semi-girder framework 302 respectively, and cylindrical bearing is equipped with in the first bearing 203, second bearing 208 inside, first bearing 203 and the second bearing 208 are arranged on initiative drive shaft 207 two ends respectively, realize the support of initiative drive shaft 207 and spacing.
Three abutments 210 and the 4th bearing 214 are arranged on the second line slideway 212 and the 3rd line slideway 216 respectively, and the second line slideway 212 and the 3rd line slideway 216 are separately fixed on semi-girder framework 302, and three abutments 210 inside is ball pivot and sliding bearing assembly, 4th bearing 214 inside is ball pivot, three abutments 210 and the 4th bearing 214 are arranged on slave drive axle 211 two ends respectively, realize the support of slave drive axle 211 and spacing.
Described first electric cylinder 209 and the second electric cylinder 213 are for tensioning road surface travelling belt 205, its course of work is achieved in that the first electric cylinder 209 and second electric cylinder 213 one end are separately fixed on semi-girder framework 302, the other end is connected with the 4th bearing 214 with three abutments 210 respectively, first electric cylinder 209 and the second electric cylinder 213 promote three abutments 210 and the 4th bearing 214 respectively, make three abutments 210 and the 4th bearing 214 respectively on the second line slideway 212 and the 3rd line slideway 216 along guide rail direction to right translation, and then the driven rotary drum 215 on drive driven shaft is to right translation, because road surface travelling belt 205 is arranged on active rotary drum 204 and driven rotary drum 215, because active rotary drum 204 maintains static, and driven rotary drum 215 moves right, so, road surface travelling belt 205 will be tensioned.After road surface travelling belt 205 tensioning, buncher 201 drives initiatively rotary drum 204 to rotate, and because road surface travelling belt 205 is tensionings, initiatively rotary drum 204 just can drive road surface travelling belt 205 to carry out transmission.
Alternatively, described road surface travelling belt 205 material is steel, and the sand paper of different brackets can be pasted in its surface, such as 80,120,180 object sand paper, simulates the road surface of different attachment.
Plane thrust bearing 217 between active rotary drum 204 and driven rotary drum 215, and is arranged on semi-girder framework 302, and it supports road surface travelling belt 205, prevents the load due to fixture module 1 from making road surface travelling belt 205 free distortion, destruction etc.
Alternatively, described plane thrust bearing 217 is hydrostatic slideway, hydrodynamic slideway, pneumato-static slideway or high density fiberboard etc.
Described image capture instrument 206 is arranged on the underframe 303 of initiatively rotary drum 204 side, for gathering the position of the relative initiatively rotary drum 204 of road surface travelling belt 205, if larger relative shift between road surface travelling belt 205 and active rotary drum 204 detected, adjustable first electric cylinder 209 and the second electric cylinder 213, change the rate of tension of road surface travelling belt 205, thus make road surface travelling belt 205 be positioned at the middle position of initiatively rotary drum 204, ensure road surface travelling belt 205 steadily effectively transmission.
To sum up, the course of work of the present utility model is summarized as follows:
First, first electric cylinder 209 is connected with semi-girder framework 302 respectively with second electric cylinder 213 one end, the other end promote three abutments 210 and the 4th bearing 214 respectively on the second line slideway 212, the 3rd line slideway 216 to right translation, thus promote driven rotary drum 215 and carry out tensioning road surface travelling belt 205;
The second, buncher 201 drives initiative drive shaft 207 to rotate by driving belt 202, and initiative drive shaft 20 drives initiatively rotary drum 204 to rotate, and because road surface travelling belt 205 is tensionings, initiatively rotary drum 204 just can drive road surface travelling belt 205 to carry out transmission;
3rd, rubber sample 107 imposed load given by hydraulic loaded cylinder 102, rubber sample 107 is contacted with road surface travelling belt 205, simulation loading load, realize the fricting movement of rubber sample 107 and road surface travelling belt 205, make the cut power of generation horizontal direction and the pressure of vertical direction, and carry out test figure data acquisition by pressure at right angle sensor 103 and horizontal pressure force sensor 108.
Claims (9)
1. a V belt translation formula rubber friction characteristic test system, form primarily of fixture module (1), road surface power system (2) and support frame (3), it is characterized in that: described fixture module (1) is fixed on the upper frame (301) of support frame (3), road surface power system (2) is supported by the semi-girder framework (302) of support frame (3), and described semi-girder framework (302) is connected with the underframe (303) of support frame (3); Road surface travelling belt (205) in described road surface power system (2) moves under the drive of motor; Described fixture module (1) is positioned at the top of road surface travelling belt (205), wherein containing hydraulic loaded cylinder (102) and pressure transducer, described hydraulic loaded cylinder (102) is to rubber sample (107) imposed load to be measured below it, make rubber sample (107) and road surface travelling belt (205) rubbing contact, and by pressure transducer, the pressure that rubber sample (107) is subject to is gathered.
2. a kind of V belt translation formula rubber friction characteristic test system according to claim 1, it is characterized in that: in described fixture module (1), hydraulic loaded cylinder (102) is fixed on upper frame (301) by the top board of holder (101), the first line slideway (105) is installed in hydraulic loaded cylinder (102) below, described rubber sample (107) is contained in accommodation box (106), and is slidably connected with the first line slideway (105); Described pressure transducer comprises pressure at right angle sensor (103) and horizontal pressure force sensor (108), wherein pressure at right angle sensor (103) is arranged between hydraulic loaded cylinder (102) and the first line slideway (105), horizontal pressure force sensor (108) left end is connected with the side plate of holder (101), and right-hand member is connected with accommodation box (106).
3. a kind of V belt translation formula rubber friction characteristic test system according to claim 2, it is characterized in that: between hydraulic loaded cylinder (102) and the first line slideway (105), described pressure at right angle sensor (103) both sides are provided with guide bars (104).
4. a kind of V belt translation formula rubber friction characteristic test system according to claim 1 or 2, is characterized in that: described road surface power system (2) forms primarily of buncher (201), initiative drive shaft (207) and active rotary drum (204), road surface travelling belt (205), slave drive axle (211) and the driven rotary drum (215) be arranged on slave drive axle (211) be arranged on initiative drive shaft (207); Described road surface travelling belt (205) is arranged on initiatively rotary drum (204) and the upper also tensioning of driven rotary drum (215), power is delivered to initiative drive shaft (207) by driving belt (202) by described buncher (201), and then drives road surface travelling belt (205) motion.
5. a kind of V belt translation formula rubber friction characteristic test system according to claim 4, it is characterized in that: described initiative drive shaft (207) two ends support respectively by the first bearing (203) and the second bearing (208), and be directly fixedly mounted on semi-girder framework (302), slave drive axle (211) two ends support respectively by three abutments (210) and the 4th bearing (214), and on the second line slideway (212) be slidably mounted on semi-girder framework (302) and the 3rd line slideway (216); Described active rotary drum (204) is parallel with between driven rotary drum (215) is provided with the first electric cylinder (209) and the second electric cylinder (213), described first electric cylinder (209) and second electric cylinder (213) one end are separately fixed on semi-girder framework (302), and the other end is connected with three abutments (210) and the 4th bearing (214) respectively.
6. a kind of V belt translation formula rubber friction characteristic test system according to claim 5, it is characterized in that: described underframe (303) is provided with image capture instrument (206), for detecting the relative displacement of road surface travelling belt (205) and active rotary drum (204).
7. a kind of V belt translation formula rubber friction characteristic test system according to claim 5, it is characterized in that: described first bearing (203) and the second bearing (208) inside are cylindrical bearing, three abutments (210) inside is ball pivot and sliding bearing assembly, and the 4th bearing (214) inside is ball pivot.
8. a kind of V belt translation formula rubber friction characteristic test system according to claim 1, it is characterized in that: on described semi-girder framework (302), plane thrust bearing (217) is housed, described plane thrust bearing (217) is positioned at road surface travelling belt (205) below, and just to hydraulic loaded cylinder (102).
9. a kind of V belt translation formula rubber friction characteristic test system according to claim 1, is characterized in that: road surface travelling belt (205) material is steel, it posts the sand paper of different brackets, to simulate the road surface of different attachment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520108710.6U CN204405515U (en) | 2015-02-13 | 2015-02-13 | A kind of V belt translation formula rubber friction characteristic test system |
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| CN201520108710.6U CN204405515U (en) | 2015-02-13 | 2015-02-13 | A kind of V belt translation formula rubber friction characteristic test system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596920A (en) * | 2015-02-13 | 2015-05-06 | 吉林大学 | Belt driving type rubber friction characteristic test system |
| CN104965528A (en) * | 2015-07-03 | 2015-10-07 | 苏州昌飞自动化设备厂 | Belt friction testing and position-correcting apparatus of belt frictional force test machine |
| CN104990662A (en) * | 2015-07-17 | 2015-10-21 | 苏州昌飞自动化设备厂 | Belt friction force testing machine |
| RU172473U1 (en) * | 2016-04-28 | 2017-07-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный аграрный университет имени В.Я. Горина" | Device for determining the coefficient of adhesion of the wheel propulsion with the supporting surface |
| RU172951U1 (en) * | 2016-10-24 | 2017-08-01 | Федеральное государственное бюджетное учреждение науки Институт проблем нефти и газа Сибирского отделения Российской академии наук | A device for studying the friction of wheel rubber with asphalt concrete pavement |
| CN107145683A (en) * | 2017-06-06 | 2017-09-08 | 吉林大学 | A kind of discrimination method of UniTire tire models parameter |
| CN111759051A (en) * | 2020-07-14 | 2020-10-13 | 黎明职业大学 | Return stroke self-locking type sole limited slip testing arrangement |
| CN111929186A (en) * | 2020-08-06 | 2020-11-13 | 重庆广播电视大学重庆工商职业学院 | Tire wear performance testing system |
| CN112432873A (en) * | 2019-08-26 | 2021-03-02 | 北京化工大学 | Device and method for detecting abrasion of fine particles of tread rubber composite material |
| CN115318904A (en) * | 2022-08-18 | 2022-11-11 | 浙江东宇电气股份有限公司 | Production forming equipment and process for high-voltage power distribution cabinet |
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2015
- 2015-02-13 CN CN201520108710.6U patent/CN204405515U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596920A (en) * | 2015-02-13 | 2015-05-06 | 吉林大学 | Belt driving type rubber friction characteristic test system |
| CN104965528A (en) * | 2015-07-03 | 2015-10-07 | 苏州昌飞自动化设备厂 | Belt friction testing and position-correcting apparatus of belt frictional force test machine |
| CN104990662A (en) * | 2015-07-17 | 2015-10-21 | 苏州昌飞自动化设备厂 | Belt friction force testing machine |
| RU172473U1 (en) * | 2016-04-28 | 2017-07-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный аграрный университет имени В.Я. Горина" | Device for determining the coefficient of adhesion of the wheel propulsion with the supporting surface |
| RU172951U1 (en) * | 2016-10-24 | 2017-08-01 | Федеральное государственное бюджетное учреждение науки Институт проблем нефти и газа Сибирского отделения Российской академии наук | A device for studying the friction of wheel rubber with asphalt concrete pavement |
| CN107145683B (en) * | 2017-06-06 | 2020-09-01 | 吉林大学 | Identification method for UniTire tire model parameters |
| CN107145683A (en) * | 2017-06-06 | 2017-09-08 | 吉林大学 | A kind of discrimination method of UniTire tire models parameter |
| CN112432873A (en) * | 2019-08-26 | 2021-03-02 | 北京化工大学 | Device and method for detecting abrasion of fine particles of tread rubber composite material |
| CN111759051A (en) * | 2020-07-14 | 2020-10-13 | 黎明职业大学 | Return stroke self-locking type sole limited slip testing arrangement |
| CN111759051B (en) * | 2020-07-14 | 2021-08-24 | 黎明职业大学 | Return stroke self-locking type sole limited slip testing arrangement |
| CN111929186A (en) * | 2020-08-06 | 2020-11-13 | 重庆广播电视大学重庆工商职业学院 | Tire wear performance testing system |
| CN115318904A (en) * | 2022-08-18 | 2022-11-11 | 浙江东宇电气股份有限公司 | Production forming equipment and process for high-voltage power distribution cabinet |
| CN115318904B (en) * | 2022-08-18 | 2023-11-17 | 浙江东宇电气股份有限公司 | High-voltage power distribution cabinet production molding equipment and process |
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