CN202486005U - Low-stress multi-collision test device - Google Patents
Low-stress multi-collision test device Download PDFInfo
- Publication number
- CN202486005U CN202486005U CN201220123076XU CN201220123076U CN202486005U CN 202486005 U CN202486005 U CN 202486005U CN 201220123076X U CN201220123076X U CN 201220123076XU CN 201220123076 U CN201220123076 U CN 201220123076U CN 202486005 U CN202486005 U CN 202486005U
- Authority
- CN
- China
- Prior art keywords
- block stamp
- multipacting
- lever
- low stress
- test unit
- 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 - Fee Related
Links
Images
Abstract
The utility model discloses a low-stress multi-collision test device, which comprises a ram hammer, a spring and an electromagnet, wherein the spring is connected with the ram hammer so as to adjust the impact force of the ram hammer, the electromagnet is used for providing power for the ram hammer, wherein the ram hammer has a stepped shape and comprises a first wide part and a second narrow part, and one side of the first part is provided with a groove; the low-stress multi-collision test device also comprises a lever and a relay for controlling the impact frequency of the ram hammer; the lever comprises a first end and a second end; the first end of the lever is provided with an electromagnet armature for adsorbing the electromagnet; and the second lever of the lever is positioned in the groove of the ram hammer. The low-stress multi-collision test device disclosed by the utility model is reasonable in structure and stable in impact force; the power is provided by electric energy and is cleaner than hydraulic pressure control; the impact frequency is controlled through the relay, so that stepless regulation can be realized; and moreover, the travel of the ram hammer is controlled through the lever, and the range of the travel of the ram hammer is easily controlled.
Description
Technical field
The utility model relates to a kind of test unit, relates in particular to a kind of low stress multipacting test unit.
Background technology
Envelope test machine the earliest is a mechanical type; Britain has produced the lever and weight type Material Testing Machine as far back as 1880; Produced the universal testing machine (blank of electronic universal tester) that nut, screw rod load again in 1908, these testing machines can carry out stretching, compression, the bending of material and test such as reverse.Before 90 years, Switzerland Amsler company has developed universal hydraulic testing machine, and this testing machine is easy than mechanical operation, power output is big, simple in structure, volume compact, can accomplish the various static mechanical performance tests of material.
1850, German A.Whler (Waller) designed first fatigue tester (also claiming the A.Whler fatigue tester) that is used for motorcycle axle, is used for carrying out the torture test of full-scale motorcycle axle.
At eighties of last century beginning of the fifties, the magneto torque-motor of high-speed response has appearred, and it is the electrohydraulic servo valve of pilot stage that the later stage fifties has occurred again with the Nozzle flapper valve, and it is the fastest to make electrohydraulic servo system become response at that time, the servo-drive system that control accuracy is the highest.The electro-hydraulic servo dynamic fatigue test machine grows up along with the development of electro-hydraulic servo technology under this background.Main cause is that it can carry out the test of dynamic high and low cycle fatigue, programmed control torture test, also can carry out test and the mechanical property test of various routines under static constant speed, constant strain, the constant stress control, also can carry out fracture mechanics test.
As shown in Figure 1, Fig. 1 is a kind of homemade collision test device of the prior art, i.e. testing machine.This collision test device adopts hydraulic technique and can realize repeatedly collision.This collision test device mainly comprises spring 2 that frame 1, web joint 3, two ends are connected with frame 1 and web joint 3 respectively, piston rod 4, hydraulic cylinder 5, the pouring weight 6 that is connected in piston rod 4 other ends that an end is fixedly connected with web joint 3, be located at the drift 7 of pouring weight 6 ends, be arranged at drift 7 belows collides the test specimen 8 in zone, worktable anchor clamps 9, accumulator 10, inserted valve 11,12,14 and the solenoid directional control valve 13 of clamping test pieces 8.This collision test device also comprises surplus valve 16, variable output pump 17 and hand-operated direction valve 15,18.Though having satisfied, the collision test device of this kind structure simulates the requirement that operating mode is hit in multipacting; But in actual tests, still exist impassable shortcoming; Unreasonable such as hydraulic circuit control section design in the original system, there is the untimely situation of hydraulic circuit frequency response sometimes, the system oil temperature is too high; Hydraulic oil is revealed serious, influences the reliability of system; Since the compressibility of hydraulic oil itself, the power that impacts instability.These shortcomings directly can influence the process and the result of test.
As shown in Figure 2, Fig. 2 is the principle of work synoptic diagram of the moving hammer of oil structure testing machine.The moving hammer of this oil structure testing machine is the alternating magnetization that utilizes two coils, makes tup produce linear reciprocating motion.But should the moving hammer of oil structure testing machine be directly to control impulsive force and frequency of impact, can not realize stepless regulated through input current.
As shown in Figure 3, Fig. 3 is the principle of work synoptic diagram of cam-spring mechanical formula shock machine.This kind mechanical testing machine comprises anchor clamps 27 lower clamps 28 on big belt wheel 18 belts 19 small pulleys 20 cams 21 levers 22 frames 23 shelfs 24 long sleeves 25 spring devices 26.This kind mechanical testing machine is to utilize the energy conversion mode of cam 21 and spring device 26 to realize repeatedly the impact motion.The power resources of whole test machine are in a drive motor, and this drive motor drives flywheel and power passed to bent axle and drive big belt pulley 18 work, and last big belt pulley 18 is passed to small pulley 20 with power through belt 19 and driven camshaft work.Belt pulley is installed on the bent axle of pressing machine, and the camshaft that is driven on the attachment device by belt pulley rotates, and through the effect of camshaft and lever, spring is compressed again, utilizes the compression energy of spring to discharge, and makes drift realize the impact behavior to test specimen.The big I of impulsive force realizes by regulating the bolt regulating spring.But this kind mechanical testing machine mainly dashes the needs of collision in order to satisfy little energy more, and impulsive force instability and range of application are narrower.
Therefore, to above-mentioned technical matters, be necessary to provide a kind of structure improved low stress multipacting test unit, to overcome above-mentioned defective.
The utility model content
In view of this, the purpose of the utility model is to provide a kind of rational in infrastructure and low stress multipacting test unit that impulsive force is stable.
For realizing above-mentioned purpose, the utility model provides following technical scheme:
A kind of low stress multipacting test unit; It comprises block stamp, is connected the electromagnet that power is provided with the spring of adjusting block stamp impulsive force size and to block stamp with block stamp; Said block stamp is notch cuttype, and said block stamp comprises the first of broad and narrower second portion, and a side of said first offers groove; Said low stress multipacting test unit also comprises the relay of lever and control block stamp frequency of impact; Said lever comprises first end and the second end, and the first end of said lever is provided with the electromagnet armature of absorption electromagnet, and the second end of said lever is arranged in the groove of block stamp.
Preferably, in above-mentioned low stress multipacting test unit, said low stress multipacting test unit also comprises roller and roller is fixed on the inner bolt on the second end of lever that said roller is positioned at groove.
Preferably, in above-mentioned low stress multipacting test unit, said low stress multipacting test unit also comprises fixing said block stamp and is located at the upper bush in the block stamp first, is clearance fit between said upper bush and the block stamp.
Preferably, in above-mentioned low stress multipacting test unit, said low stress multipacting test unit also comprises fixing said block stamp and is located at the lower sleeve on the block stamp second portion, is clearance fit between said lower sleeve and the block stamp.
Preferably, in above-mentioned low stress multipacting test unit, said low stress multipacting test unit also comprises the guard box that is installed on said block stamp periphery, and said upper and lower sleeve is located at the two ends up and down of guard box respectively.
Preferably, in above-mentioned low stress multipacting test unit, be interference fit between said upper and lower sleeve and the guard box.
Preferably, in above-mentioned low stress multipacting test unit, said guard box is provided with a window that supplies lever to insert.
Preferably, in above-mentioned low stress multipacting test unit, said low stress multipacting test unit also comprises the spring end cap, and said spring end cap is with the block stamp fixing spring from two ends respectively.
Compared with prior art, the beneficial effect of the utility model is:
(1) the rational in infrastructure and impulsive force of low stress multipacting test unit is stable;
(2) frequency of impact of low stress multipacting test unit is controlled by relay, can realize stepless regulated;
(3) stroke of the block stamp of low stress multipacting test unit is by lever and lower sleeve control, and travel range is easy to regulation and control;
(4) low stress multipacting test unit uses electric energy, cleans than hydrostatic control.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing of the relevant the utility model in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the many principle of work synoptic diagram towards collision test device of a kind of hydraulic pressure in the prior art;
Fig. 2 is the principle of work synoptic diagram of the moving hammer of a kind of oil structure testing machine in the prior art;
Fig. 3 is the principle of work synoptic diagram of a kind of cam in the prior art-spring mechanical formula shock machine;
Fig. 4 is in the synoptic diagram of off-state for electromagnet in the utility model low stress multipacting test unit;
Fig. 5 is in the synoptic diagram of "on" position for electromagnet in the utility model low stress multipacting test unit;
Fig. 6 is the synoptic diagram of the lever left and right sides arm of force in the utility model low stress multipacting test unit;
Fig. 7 is the synoptic diagram of block stamp in the utility model low stress multipacting test unit;
Fig. 8 is the synoptic diagram of another angle of block stamp among Fig. 7;
Fig. 9 is the synoptic diagram of electromagnet armature in the utility model low stress multipacting test unit;
Figure 10 is in the utility model low stress multipacting test unit and the synoptic diagram at electromagnetic actuation position;
Figure 11 is the synoptic diagram of roller in the utility model low stress multipacting test unit;
Figure 12 is the synoptic diagram of screw in the utility model low stress multipacting test unit;
Figure 13 is the connection synoptic diagram of roller screw in the utility model low stress multipacting test unit;
Figure 14 is the synoptic diagram of guard box in the utility model low stress multipacting test unit;
Figure 15 is the synoptic diagram that cooperates with block stamp of sleeve up and down in the utility model low stress multipacting test unit;
Figure 16 is the synoptic diagram of the utility model low stress multipacting test unit medi-spring end cap;
Figure 17 in the utility model low stress multipacting test unit up and down sleeve be installed in the synoptic diagram on the guard box;
Figure 18 is a structural representation in the utility model low stress multipacting test unit.
Wherein: 1, frame; 2, spring; 3, web joint; 4, piston rod; 5, hydraulic cylinder; 6, pouring weight; 7, drift; 8, test specimen; 9, worktable anchor clamps; 10, accumulator; 11,12,14 inserted valves; 13, solenoid directional control valve; 15,18 hand-operated direction valves; 16, surplus valve; 17, variable output pump; 18, big belt wheel; 19, belt; 20, small pulley; 21, cam; 22, lever; 23, frame; 24, shelf; 25, long sleeve; 26, spring device; 27, go up anchor clamps; 28, lower clamp; 100, test specimen; 29, block stamp; 291, first; 292, second portion; 293, groove; 30, spring 31, electromagnet; 32, lever; 321, first end; 322, the second end; 33, relay; 34, electromagnet armature; 341, electromagnetism adhesive position; 35, roller; 36, inner bolt; 37, upper bush; 38, lower sleeve; 39, guard box; 391, window 40, spring end cap.
Embodiment
The utility model discloses a kind of rational in infrastructure and low stress multipacting test unit that impulsive force is stable, this low stress multipacting test unit comprises block stamp, be connected the electromagnet that power is provided with the spring of regulating block stamp impulsive force size and to block stamp with block stamp.Block stamp is notch cuttype, and block stamp comprises the first of broad and narrower second portion, and a side of first offers groove.Low stress multipacting test unit also comprises the relay of lever and control block stamp frequency of impact.Lever comprises first end and the second end, and the first end of lever is provided with the electromagnet armature of absorption electromagnet, and the second end of said lever is arranged in the groove of block stamp.The low stress multipacting test unit of this kind structure is rational in infrastructure and impulsive force stable; Adopt electric energy that power is provided, clean than hydrostatic control; Adopt relay control frequency of impact, can realize stepless regulated; Adopt lever control block stamp stroke, the block stamp travel range is easy to regulation and control.
Further, low stress multipacting test unit also comprises roller and roller is fixed on the inner bolt on the second end of lever that roller is positioned at groove.
Further, low stress multipacting test unit also comprises fixing said block stamp and is located at the upper bush in the block stamp first, is clearance fit between said upper bush and the block stamp.
Further, low stress multipacting test unit also comprises fixing said block stamp and is located at the lower sleeve on the block stamp second portion, is clearance fit between said lower sleeve and the block stamp.
Further, low stress multipacting test unit also comprises the guard box that is installed on the block stamp periphery, and upper bush and lower sleeve are located at the two ends up and down of guard box respectively.It between upper bush and lower sleeve and the guard box interference fit.Guard box is provided with a window that supplies lever to insert.
Further, low stress multipacting test unit also comprises the spring end cap, and the spring end cap is with the block stamp fixing spring from two ends respectively.
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is described in detail, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the utility model is protected.
Like Fig. 4, Fig. 5, Fig. 7, Fig. 8, Fig. 9, Figure 10 and shown in Figure 180, low stress multipacting test unit is in order to collide test specimen 100.Low stress multipacting test unit comprises block stamp 29, is connected the relay 33 that electromagnet 31, lever 32 and control block stamp 29 frequency of impacts of power are provided with the big or small spring 30 of adjusting block stamp 29 impulsive forces, to block stamp 29 with block stamp 29.Block stamp 29 is notch cuttype, and block stamp 29 comprises the first 291 that is positioned at upper end and broad and be positioned at the lower end and narrower second portion 292 that a side of first offers groove 293.When required impulsive force during, can increase impulsive forces through spring 30 greater than the gravity of block stamp 29.Lever 32 comprises first end 321 and the second end 322, and wherein, the first end 321 of lever 32 is provided with the electromagnet armature 34 of absorption electromagnet 31, and the second end 322 of lever 32 is arranged in the groove 293 of block stamp 29.Electromagnet armature 34 is provided with electromagnetism adhesive position 341.The low stress multipacting test unit of this kind structure is rational in infrastructure and impulsive force stable; Adopt electric energy that power is provided, clean than hydrostatic control; Adopt relay 33 control frequency of impacts, can realize stepless regulated; Adopt the stroke of lever 32 control block stamps 29, make the travel range of block stamp 29 be easy to regulation and control.
To shown in Figure 13, low stress multipacting test unit also comprises roller 35 and roller 35 is fixed on the inner bolt 36 on the second end 322 of lever 32 that roller 36 is positioned at groove 293 like Figure 11.Substitute directly slip in groove 293 of lever 32 through roller 35 is set, when driving roller 35 with block stamp 29 rises, can reduce wearing and tearing groove 293 places of block stamp 29 in lever 29 motions.
Like Figure 15 and shown in Figure 17, low stress multipacting test unit also comprises fixing block stamp 29 and is located at upper bush 37 and the fixing block stamp 29 and be located at the lower sleeve 38 on the second portion 292 of block stamp 29 in the first 291 of block stamp 29.Being clearance fit between upper bush 37 and the block stamp 29, also is clearance fit between lower sleeve 38 and the block stamp 29.Locate block stamp 29 through upper bush 37 and lower sleeve 38, make block stamp 29 positioning stablities; And, lower sleeve 38 is provided with on the narrower second portion 292 of block stamp 29, because second portion 292 is directly to collide test specimen 100; After test specimen 100 is repeatedly collided, produce and be out of shape, the thickness of test specimen 100 can diminish, and then makes the collision displacement of block stamp 29 increase; When test specimen 100 reaches requirement distortion size,, can damage the size of test specimen 100 if block stamp 29 continues to collide; At this moment, through regulating lower sleeve 38 before colliding, when test specimen 100 reaches requirement distortion size; The end difference of block stamp 29 can arrive to lower sleeve 38, and then the block stamp 29 that stops that lower sleeve 38 can be in good time continues to collide test specimen 100.Hence one can see that, and lower sleeve 38 can play the effect of regulating block stamp 29 strokes.
Shown in figure 14; In order to protect the surface of contact between block stamp 29 and upper bush 37 and the lower sleeve 38; With the dust in the secluding air; The low stress multipacting test unit of the utility model also comprises the guard box 39 that is installed on block stamp 29 peripheries, and upper bush 37 and lower sleeve 38 are located at the two ends up and down of guard box 39 respectively.Be interference fit between upper bush 37 and lower sleeve 38 and the guard box 39.Guard box 39 is provided with a window 391 that supplies lever 32 to insert.Among the embodiment of the utility model, window 391 is a rectangle, certainly in other embodiments, can adopt other shapes, and the window 391 of all shapes is all within the protection domain of the utility model.
Shown in figure 16, low stress multipacting test unit also comprises spring end cap 40, and spring end cap 40 is with block stamp 29 fixing spring 30 from two ends respectively.
As shown in Figure 6, the lever left and right sides arm of force is than for 1:X, and left end rising 1mm is then at the amplification lower heavy punch rising Xmm of lever.So,, can reach the purpose of control block stamp 29 strokes through changing left and right sides arm of force value.
Like Fig. 1 and shown in Figure 2, when relay 33 was in off-state, lever 32 left ends did not receive electromagnetic force, and lever 32 is in horizontality, and weight 29 contacts with test specimen 100.After giving electromagnet 31 energisings, lever 32 rotates counterclockwise under the electromagnetic force effect, and lever 32 left ends descend, and right-hand member rises, and lever 32 right-hand members drive weight 29 through roller 35 and rise, and disengage with test specimen 100.After electromagnet 31 outages, electromagnetic force disappears, and lever 32 right-hand members descend under weight 29 self gravitation effects, clockwise rotate the position that is up to the standard again, and weight 29 also contacts with test specimen 100 once more.
Compared with prior art, the beneficial effect of the utility model is:
(1) the rational in infrastructure and impulsive force of low stress multipacting test unit is stable;
(2) frequency of impact of low stress multipacting test unit can be realized stepless regulated by relay 33 controls;
(3) stroke of low stress multipacting test unit is by lever 32 and lower sleeve 38 controls, and travel range is easy to regulation and control;
(4) low stress multipacting test unit uses electric energy, cleans than hydrostatic control.
To those skilled in the art, obviously the utility model is not limited to the details of above-mentioned example embodiment, and under the situation of spirit that does not deviate from the utility model or essential characteristic, can realize the utility model with other concrete form.Therefore; No matter from which point; All should regard embodiment as exemplary; And be nonrestrictive, the scope of the utility model is limited accompanying claims rather than above-mentioned explanation, therefore is intended to the implication of the equivalents that drops on claim and all changes in the scope are included in the utility model.Should any Reference numeral in the claim be regarded as limit related claim.
In addition; Describing according to embodiment though should be appreciated that this instructions, is not that each embodiment only comprises an independently technical scheme; This narrating mode of instructions only is for clarity sake; Those skilled in the art should make instructions as a whole, and the technical scheme among each embodiment also can form other embodiments that it will be appreciated by those skilled in the art that through appropriate combination.
Claims (8)
1. low stress multipacting test unit; It comprises block stamp, is connected the electromagnet that power is provided with the spring of adjusting block stamp impulsive force size and to block stamp with block stamp; It is characterized in that: said block stamp is notch cuttype, and said block stamp comprises the first of broad and narrower second portion, and a side of said first offers groove; Said low stress multipacting test unit also comprises the relay of lever and control block stamp frequency of impact; Said lever comprises first end and the second end, and the first end of said lever is provided with the electromagnet armature of absorption electromagnet, and the second end of said lever is arranged in the groove of block stamp.
2. low stress multipacting test unit according to claim 1 is characterized in that: also comprise roller and roller is fixed on the inner bolt on the second end of lever, said roller is positioned at groove.
3. low stress multipacting test unit according to claim 1 is characterized in that: also comprising fixing said block stamp and be located at the upper bush in the block stamp first, is clearance fit between said upper bush and the block stamp.
4. low stress multipacting test unit according to claim 3 is characterized in that: also comprising fixing said block stamp and be located at the lower sleeve on the block stamp second portion, is clearance fit between said lower sleeve and the block stamp.
5. low stress multipacting test unit according to claim 4 is characterized in that: also comprise being installed on the peripheral guard box of said block stamp, said upper and lower sleeve is located at the two ends up and down of guard box respectively.
6. low stress multipacting test unit according to claim 5 is characterized in that: be interference fit between said upper and lower sleeve and the guard box.
7. low stress multipacting test unit according to claim 5 is characterized in that: said guard box is provided with a window that supplies lever to insert.
8. low stress multipacting test unit according to claim 1 is characterized in that: also comprise the spring end cap, said spring end cap is with the block stamp fixing spring from two ends respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220123076XU CN202486005U (en) | 2012-03-28 | 2012-03-28 | Low-stress multi-collision test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220123076XU CN202486005U (en) | 2012-03-28 | 2012-03-28 | Low-stress multi-collision test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202486005U true CN202486005U (en) | 2012-10-10 |
Family
ID=46960420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220123076XU Expired - Fee Related CN202486005U (en) | 2012-03-28 | 2012-03-28 | Low-stress multi-collision test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202486005U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018095A (en) * | 2012-11-28 | 2013-04-03 | 沈阳化工大学 | Outage test sample protection device of creep deformation machine |
| CN112945726A (en) * | 2021-01-29 | 2021-06-11 | 太原理工大学 | Split Hopkinson bar pulling/pressing-twisting dynamic composite loading device and operation method |
-
2012
- 2012-03-28 CN CN201220123076XU patent/CN202486005U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018095A (en) * | 2012-11-28 | 2013-04-03 | 沈阳化工大学 | Outage test sample protection device of creep deformation machine |
| CN112945726A (en) * | 2021-01-29 | 2021-06-11 | 太原理工大学 | Split Hopkinson bar pulling/pressing-twisting dynamic composite loading device and operation method |
| CN112945726B (en) * | 2021-01-29 | 2022-06-07 | 太原理工大学 | Split Hopkinson bar pulling/pressing-twisting dynamic composite loading device and operation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10018544B2 (en) | Electromagnetic multiaxial fatigue testing machine | |
| CN204018624U (en) | A kind of pneumatic hammer anvil block | |
| CN202486005U (en) | Low-stress multi-collision test device | |
| CN105964855A (en) | Spring lever type hammering machine | |
| US9941779B2 (en) | Linear or rotary actuator using electromagnetic driven hammer as prime mover | |
| CN201277217Y (en) | Reciprocating apparatus capable of generating multiplied oil cylinder stroke | |
| CN101734007A (en) | Device for reducing inertia load impact excitation of high-speed automatic die cutting and hot stamping machine | |
| CN101508180B (en) | Micro-impact briquetting drive device based on granite slide block | |
| CN203561498U (en) | Valve spring dynamic simulation fatigue machine | |
| CN102476465A (en) | Double-hammer type press machine | |
| CN104259292A (en) | Quick return type blanking buffer device and hydropress for blanking | |
| CN201176986Y (en) | Servo- oil cylinder overtravel protection mechanical spacing structure | |
| CN203743350U (en) | Preloaded bearing sine crank mechanism | |
| CN203608110U (en) | Magnetostriction-type inertial impact driver | |
| CN203570715U (en) | Mechanism for using plate cam for free variable motion | |
| CN109469059B (en) | Method and device for quickly lifting hydraulic pile hammer | |
| CN202732832U (en) | Damping device for power transmission mechanism | |
| CN110576416A (en) | Pressure sensing equipment with adjustable air pressure and double compression cylinders for engineering machinery | |
| CN201716178U (en) | Mechanical running-in device for alternating-current high-voltage switches | |
| CN102092144A (en) | Novel pressure machine | |
| CN200942598Y (en) | Electromagnetic punch press | |
| CN215634793U (en) | Adjustable axial reciprocating sliding device | |
| CN202656810U (en) | Self-resetting draw bar mechanism | |
| CN202593427U (en) | Driving multiple connecting rod air pressure buffering device | |
| CN220706108U (en) | Hydraulic cylinder buffer device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20150328 |
|
| EXPY | Termination of patent right or utility model |