CN204938843U - A kind of shearing type lifter hydraulic ram automatic leveling device - Google Patents
A kind of shearing type lifter hydraulic ram automatic leveling device Download PDFInfo
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- CN204938843U CN204938843U CN201520748050.8U CN201520748050U CN204938843U CN 204938843 U CN204938843 U CN 204938843U CN 201520748050 U CN201520748050 U CN 201520748050U CN 204938843 U CN204938843 U CN 204938843U
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Abstract
The utility model discloses a kind of shearing type lifter hydraulic ram automatic leveling device, comprise master cylinder, auxiliary oil cylinder, hydraulic efficiency pressure system, hydraulic control pump, master cylinder, auxiliary oil cylinder include cylinder body, be arranged on piston in cylinder body and piston rod, cylinder body is divided rod chamber and rodless cavity by piston, and rod chamber is provided with oil outlet, rodless cavity is provided with oil inlet; The mouth of hydraulic efficiency pressure system is connected with master cylinder oil inlet, and master cylinder oil outlet is connected with auxiliary oil cylinder oil inlet, and auxiliary oil cylinder oil outlet is connected with the fuel tank of hydraulic efficiency pressure system by oil return pipe; Cylinder body top internal diameter is greater than internal diameter in the middle part of cylinder body, internal diameter train spacing point is automatic makeup oil level, piston overlaps to have between combined seal ring and cylinder body top inner wall and forms repairing path, hydraulic control pump is provided with the distance that limit switch control plunger moves to stop bit in piston, piston stops distance of positions automatic makeup oil level and is greater than 10mm.The utility model integral structure is simple, and tooling cost is low; Repairing exhaust process is simple, and levelling effect is good, consuming time few.
Description
Technical field
The utility model relates to shearing type lifter, is specifically related to a kind of shearing type lifter hydraulic ram automatic leveling device.
Background technology
Auto hoist refers to that automobile maintenance industry protects equipment for the vapour of vehicle hoisting, can be divided into the several types such as single-column, twin columns, four posts, scissors according to function and shape.Existing shearing type lifter realizes the synchronous rising of major-minor platform by the series connection of master cylinder and auxiliary oil cylinder or declines and carry out automotive servicing, the quantity of major-minor oil cylinder is not etc., but be all integral multiple relation, one group of larger oil cylinder can be used for different shearing type lifters or use the oil cylinder of two groups little to carry out connecting and realize the lifting function of lifting table, it should be noted that the epicoele sectional area of master cylinder must be the same with the cavity of resorption sectional area of auxiliary oil cylinder, otherwise be elevated while not realizing two platforms, existing shearing type lifter, its hydraulic efficiency pressure system is when repairing exhaust and leveling, need manually to complete, repairing bleeding is loaded down with trivial details, and levelling effect is poor, take time and effort.
Publication number is that the utility model patent of CN203845759U provides one " shearing type lifter automatic leveling hydraulic device ", and comprise hydraulic efficiency pressure system, master cylinder and auxiliary oil cylinder, described master cylinder comprises cylinder body, in cylinder body, piston rod is provided with piston; The side that described piston has piston rod is rod chamber, the opposite side of piston is rodless cavity, and described piston is provided with unidirectional valve opening, arranges the nonreturn valve core with thrust spring in unidirectional valve opening, the working end of nonreturn valve core is towards rod chamber side, and the working end of nonreturn valve core is stretched out by piston face; Described cylinder body is provided with oil inlet corresponding to one end of rodless cavity, and the one end corresponding to rod chamber on cylinder body is provided with oil outlet; The structure of described auxiliary oil cylinder is identical with master cylinder structure; The mouth of described hydraulic efficiency pressure system is connected with the oil inlet of master cylinder, and the oil outlet of master cylinder is connected with the oil inlet of auxiliary oil cylinder, and the oil outlet of auxiliary oil cylinder is connected with the input end of hydraulic efficiency pressure system.Although this technical scheme solves above-mentioned technical matters to a certain extent, structure relative complex, tooling cost is high.
Summary of the invention
Goal of the invention: for the deficiencies in the prior art, the utility model provides a kind of shearing type lifter hydraulic ram automatic leveling device, and structure is simple, and operating process is simple, levelling effect good.
Technical scheme: shearing type lifter hydraulic ram automatic leveling device described in the utility model, comprise master cylinder, auxiliary oil cylinder, the hydraulic efficiency pressure system driving the motion of master cylinder, auxiliary oil cylinder and the hydraulic control pump be connected with HYDRAULIC CONTROL SYSTEM, described master cylinder, auxiliary oil cylinder include cylinder body, be arranged on piston in cylinder body and piston rod, cylinder body is divided into the rod chamber and rodless cavity with piston rod by piston, and rod chamber is provided with oil outlet, rodless cavity is provided with oil inlet; The mouth of hydraulic efficiency pressure system is connected with master cylinder oil inlet, and master cylinder oil outlet is connected with auxiliary oil cylinder oil inlet, and auxiliary oil cylinder oil outlet is connected with the fuel tank of hydraulic efficiency pressure system by oil return pipe; Described cylinder body top internal diameter is greater than internal diameter in the middle part of cylinder body, internal diameter train spacing point is automatic makeup oil level, on described piston, cover has the gap between combined seal ring and described cylinder body top inner wall to form repairing path, described hydraulic control pump is provided with limit switch, is greater than 10mm for the distance controlling stop bit in piston that described piston moves in cylinder body, piston stops automatic makeup oil level described in the distance of positions.Because cylinder body top internal diameter is greater than internal diameter in the middle part of cylinder body, so there is gap, to carry out automatic repairing in combined seal ring external diameter on piston and cylinder body top internal diameter; When normally working, by being provided with stop bit in piston in cylinder interior, the distance that piston stops the automatic makeup oil level of distance of positions cylinder block is greater than 10mm, this distance being greater than 10mm is then controlled by the limit switch of hydraulic control pump, thus master cylinder platform, auxiliary oil cylinder platform synchronous lifting when realizing normal work.
Further, described hydraulic control pump is also provided with shielding limit switch, and for controlling the motor of described hydraulic efficiency pressure system, motor driven gear pump controls described piston and moves to automatic makeup oil level.In the automatic makeup oil level of described oil cylinder and piston, stop bit controls the motor of described hydraulic efficiency pressure system respectively by the shielding limit switch on hydraulic control pump, limit switch, and motor driven gear pump moves to power-off, the energising of stop bit in piston at described piston.
Further, described cylinder body top is boss shape structure, and boss place is just to described oil outlet.Boss mechanism is set, the spacing of oversize piston and inboard wall of cylinder block, the hydraulic oil in rod chamber is more successfully flowed out from oil outlet.
Further, the gear type pump that described hydraulic efficiency pressure system comprises fuel tank, be connected with fuel tank by filtering net, the motor be connected with gear type pump, gear delivery side of pump is connected with described master cylinder oil inlet by oil inlet, and the power unit valve plate that oil inlet connects is provided with check valve.
Further, described check valve is communicated with fuel tank by the valve plate of pumping plant, and connecting pipe is provided with by pass valve.
Further, described master cylinder oil inlet is connected with described hydraulic efficiency pressure system, and hydraulic efficiency pressure system is provided with unloading electromagnetic valve and flow-controlling gate.
Further, described oil return pipe is the oil return pipe that transparent material is made.Whether having bubble to judge in transparent oil return pipe, whether major-minor oil cylinder inside has air to exist.
Further, indentation in the middle part of described combined seal ring and described inboard wall of cylinder block contact surface.
Working process is as follows: the raise button starting shearing type lifter, motor obtains electric, gear type pump rotates, hydraulic oil in fuel tank is successively through filter screen, gear type pump, check valve, master cylinder rodless cavity is entered by master cylinder oil inlet, now the platform of master cylinder rises, when the piston in master cylinder rises to limit switch startup while stop bit in piston, motor must not be electric, gear type pump stops the rotation, now start shielding limit switch, motor obtains electric, the platform of master cylinder continues to rise, when rising to extreme higher position the automatic makeup oil level of the oil cylinder (time), hydraulic oil flows out from the gap of combined seal ring and cylinder interior from master cylinder oil outlet, auxiliary oil cylinder rodless cavity is entered through auxiliary oil cylinder oil inlet, now the platform of auxiliary oil cylinder rises, when the platform of auxiliary oil cylinder rises to extreme higher position, hydraulic oil flows out from the combined seal ring of auxiliary oil cylinder and the gap of cylinder body from auxiliary oil cylinder outlet, fuel tank is flowed to through transparent oil pipe, now major-minor oil cylinder inside does not all have air, at this moment the platform of master cylinder and the platform of auxiliary oil cylinder equally high, repairing terminates.
Start the decline button of shearing type lifter, the insurance of shearing type lifter is opened, unloading electromagnetic valve obtains electric, hydraulic oil flows to fuel tank by oil inlet, shearing type lifter declines, and while in master cylinder, hydraulic oil flows into fuel tank, the rod chamber of auxiliary oil cylinder is not owing to having air, so the hydraulic oil of fuel tank to be sucked by transparent oil pipe the rod chamber of auxiliary oil cylinder, shearing type lifter declines.Start the raise button of shearing type lifter, the platform of master cylinder and the platform of auxiliary oil cylinder rise simultaneously, when rising to stop bit in piston (piston is the effect position of limit switch while rising to middle stop bit), stop rising, the distance that limit switch controls the automatic makeup oil level of stop bit and oil cylinder in oil cylinder piston is greater than 10mm, now the sectional area ability of master cylinder rod chamber is equal with the sectional area of auxiliary oil cylinder rodless cavity, ensures the normal work of shearing type lifter.
Beneficial effect: compared with prior art, advantage of the present utility model: be communicated with by gap between the rodless cavity of master cylinder of the present utility model, auxiliary oil cylinder, rod chamber, integral structure is simple, and tooling cost is low; The distance being controlled the repairing position of stop bit and oil cylinder in oil cylinder piston by the lifting controlling shearing type lifter is greater than 10mm, realizes the effect that elevator landing is synchronous, and repairing exhaust process is simple, and levelling effect is good, consuming time few.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model hydraulic efficiency pressure system.
The view of master cylinder, auxiliary oil cylinder when Fig. 3 is repairing.
Fig. 4 is the structure for amplifying schematic diagram at A place in Fig. 3.
Fig. 5 is the view of mode of operation without the need to master cylinder, auxiliary oil cylinder during repairing.
Fig. 6 is the structure for amplifying schematic diagram at B place in Fig. 5.
Detailed description of the invention
Below by accompanying drawing, technical solutions of the utility model are described in detail.
embodiment 1:shearing type lifter hydraulic ram automatic leveling device as shown in Figure 1 and Figure 2, comprises master cylinder 1, auxiliary oil cylinder 2 and hydraulic efficiency pressure system 3.Master cylinder comprises master cylinder cylinder body 11, be located at the master cylinder cylinder cap 12 at master cylinder cylinder body 11 top, be located at the main oil cylinder piston 15 of master cylinder cylinder body 11 inside, main oil cylinder piston bar 14, main oil cylinder piston 15 bar 14 stretches out outside master cylinder cylinder cap 12, sponson is provided with master cylinder head 13, master cylinder cylinder body 11 inside is separated the rod chamber and rodless cavity that are divided into and have main oil cylinder piston 15 bar 14 by main oil cylinder piston 15, be provided with master cylinder oil inlet 18 bottom master cylinder cylinder body 11 to be communicated with rodless cavity, master cylinder top is provided with master cylinder oil outlet 16 and is communicated with rod chamber, main oil cylinder piston 15 and rod chamber joint face are boss shape structure, boss place is just to master cylinder oil outlet 16, master cylinder cylinder body 11 top internal diameter is greater than internal diameter in the middle part of cylinder body, on main oil cylinder piston 15, cover has zig-zag master cylinder combined seal ring 17, combined seal ring is formed with cylinder body top inner wall and is communicated with rodless cavity, the gap of rod chamber, cylinder interior inside is provided with stop bit in piston, piston stops the distance of the repairing position at distance of positions cylinder body top for being greater than 10mm, master cylinder, auxiliary oil cylinder is connected with limit switch and shielding limit switch, the motor being respectively used to hydraulic control system moves to the power-off of stop bit in piston at piston, energising.Auxiliary oil cylinder comprises auxiliary oil cylinder cylinder body 21, be located at the auxiliary oil cylinder cylinder cap 22 at auxiliary oil cylinder cylinder body 21 top, be located at the auxiliary oil cylinder piston 25 of auxiliary oil cylinder cylinder body 21 inside, auxiliary oil cylinder piston 25 bar 24, auxiliary oil cylinder piston 25 bar 24 stretches out outside auxiliary oil cylinder cylinder cap 22, sponson is provided with secondary cylinder head 23, auxiliary oil cylinder cylinder body 21 inside is separated the rod chamber and rodless cavity that are divided into and have auxiliary oil cylinder piston 25 bar 24 by auxiliary oil cylinder piston 25, be provided with auxiliary oil cylinder oil inlet 28 bottom auxiliary oil cylinder cylinder body 21 to be communicated with rodless cavity, auxiliary oil cylinder top is provided with oil outlet and is communicated with rod chamber, auxiliary oil cylinder piston 25 and rod chamber joint face are boss shape structure, boss place is just to auxiliary oil cylinder oil outlet 26, auxiliary oil cylinder cylinder body 21 top internal diameter is greater than internal diameter in the middle part of cylinder body, on auxiliary oil cylinder piston 25, cover has chain saw dentation auxiliary oil cylinder combined seal ring 27, combined seal ring is formed with cylinder body top inner wall and is communicated with rodless cavity, the gap of rod chamber, cylinder interior is provided with stop bit in piston, piston stops the distance of the repairing position at distance of positions cylinder body top for being greater than 10mm, master cylinder, auxiliary oil cylinder is connected with limit switch and shielding limit switch, the motor being respectively used to hydraulic control system moves to the power-off of stop bit in piston at piston, energising.Hydraulic efficiency pressure system comprises fuel tank 31, gear type pump 34, motor 33, check valve 32, filtering net 35, by pass valve 36, unloading electromagnetic valve 37, flow-controlling gate 38, gear type pump 34 is connected with fuel tank 31 by filtering net 35, gear type pump 34 is connected with motor 33, the mouth of gear type pump 34 is connected with master cylinder oil inlet by oil inlet 41, oil inlet is provided with check valve 32, master cylinder oil outlet is connected with auxiliary oil cylinder oil inlet by major-minor oil cylinder connected pipes 42, auxiliary oil cylinder oil outlet is connected with fuel tank 31 by transparent oil return pipe 43, by pass valve 36 is arranged on the connecting pipe between check valve 32 and fuel tank 31, unloading electromagnetic valve 37 and flow-controlling gate 38 are arranged on the connecting pipe of master cylinder oil inlet and fuel tank 31.
Repairing working process: the raise button starting shearing type lifter, motor obtains electric, gear type pump rotates, hydraulic oil in fuel tank is successively through filter screen, check valve, master cylinder rodless cavity is entered by master cylinder oil inlet 18, now the platform of master cylinder rises, when oil cylinder reaches stroke 520mm, when the lift height of lifting machine is 1900mm, namely when piston rises to stop bit in piston, starting limig switch, motor must not be electric, gear type pump stops the rotation, the platform of master cylinder stops rising, now start shielding limit switch, motor obtains electric, the platform of master cylinder continues to rise, when oil cylinder lifting stroke reaches 560mm, when namely rising to extreme higher position, as Fig. 3, shown in Fig. 4, oil cylinder is let out in there will be, hydraulic oil flows out from the gap 46 of combined seal ring and cylinder interior from master cylinder oil outlet 26, enter auxiliary oil cylinder rodless cavity through major-minor oil cylinder connected pipes 42 from auxiliary oil cylinder oil inlet and realize automatic repairing, automatic leveling, now the platform of auxiliary oil cylinder rises, when the platform of auxiliary oil cylinder rises to extreme higher position, now unclamp limit switch, shielding limit switch, start decline button, hydraulic oil flows out from the combined seal ring of auxiliary oil cylinder and the gap of cylinder body from auxiliary oil cylinder outlet, fuel tank is flowed to through transparent oil return pipe 43, now major-minor oil cylinder inside does not all have air (judging by whether there being bubble in transparent oil return pipe whether major-minor oil cylinder inside has air to exist), repeat 2-3 time, the platform realizing master cylinder is equally high with the platform of auxiliary oil cylinder, repairing terminates.Stop bit in piston, limit switch, shielding limit switch are set to realize letting out in oil cylinder, only have in oil cylinder appearance and let out state, so automatic repairing of guarantee.
Mode of operation is without the need to repairing process: the decline button starting shearing type lifter, the insurance of shearing type lifter is opened, unloading electromagnetic valve obtains electric, in master cylinder, hydraulic oil flows to fuel tank from master cylinder oil inlet 18 by oil inlet, shearing type lifter declines, hydraulic oil inflow fuel tank while, the rod chamber of auxiliary oil cylinder owing to there is no air, so by transparent oil return pipe 43 by the hydraulic oil of fuel tank suction auxiliary oil cylinder rod chamber.Now start the raise button of shearing type lifter, the platform of master cylinder and the platform of auxiliary oil cylinder rise simultaneously, when rising to stop bit in piston, stop rising, as shown in Figure 5, Figure 6, because piston stops the distance C of repairing position, distance of positions cylinder body top for being greater than 10mm, now the sectional area ability of master cylinder rod chamber is equal with the sectional area of auxiliary oil cylinder rodless cavity, play the effect that scissor lift machine platform is synchronous, ensure the normal work of shearing type lifter, after repairing process terminates, without the need to using shielding limit switch, can control C place distance by means of only limit switch.
As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model not departing from claims definition, various change can be made in the form and details to it.
Claims (8)
1. a shearing type lifter hydraulic ram automatic leveling device, comprise master cylinder, auxiliary oil cylinder, the hydraulic efficiency pressure system driving the motion of master cylinder, auxiliary oil cylinder and the hydraulic control pump be connected with HYDRAULIC CONTROL SYSTEM, described master cylinder, auxiliary oil cylinder include cylinder body, be arranged on piston in cylinder body and piston rod, cylinder body is divided into the rod chamber and rodless cavity with piston rod by piston, and rod chamber is provided with oil outlet, rodless cavity is provided with oil inlet; The mouth of hydraulic efficiency pressure system is connected with master cylinder oil inlet, and master cylinder oil outlet is connected with auxiliary oil cylinder oil inlet, and auxiliary oil cylinder oil outlet is connected with the fuel tank of hydraulic efficiency pressure system by oil return pipe; It is characterized in that: described cylinder body top internal diameter is greater than internal diameter in the middle part of cylinder body, internal diameter train spacing point is automatic makeup oil level, on described piston, cover has the gap between combined seal ring and described cylinder body top inner wall to form repairing path, described hydraulic control pump is provided with limit switch, is greater than 10mm for the distance controlling stop bit in piston that described piston moves in cylinder body, piston stops automatic makeup oil level described in the distance of positions.
2. shearing type lifter hydraulic ram automatic leveling device according to claim 1, it is characterized in that: described hydraulic control pump is also provided with shielding limit switch, for controlling the motor of described hydraulic efficiency pressure system, motor driven gear pump controls described piston and moves to automatic makeup oil level.
3. shearing type lifter hydraulic ram automatic leveling device according to claim 1, it is characterized in that: described cylinder body top is boss shape structure, boss place is just to described oil outlet.
4. shearing type lifter hydraulic ram automatic leveling device according to claim 1, it is characterized in that: described hydraulic efficiency pressure system comprises fuel tank, the gear type pump that is connected with fuel tank by filtering net, the motor that is connected with gear type pump, gear delivery side of pump is connected with described master cylinder oil inlet by oil inlet, and the power unit valve plate that oil inlet connects is provided with check valve.
5. shearing type lifter hydraulic ram automatic leveling device according to claim 4, is characterized in that: described check valve is communicated with fuel tank by the valve plate of pumping plant, and connecting pipe is provided with by pass valve.
6. shearing type lifter hydraulic ram automatic leveling device according to claim 1, is characterized in that: described master cylinder oil inlet is connected with described hydraulic efficiency pressure system, and hydraulic efficiency pressure system is provided with unloading electromagnetic valve and flow-controlling gate.
7. shearing type lifter hydraulic ram automatic leveling device according to claim 1, is characterized in that: described oil return pipe is the oil return pipe that transparent material is made.
8. shearing type lifter hydraulic ram automatic leveling device according to claim 1, is characterized in that: indentation in the middle part of described combined seal ring and described inboard wall of cylinder block contact surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520748050.8U CN204938843U (en) | 2015-09-25 | 2015-09-25 | A kind of shearing type lifter hydraulic ram automatic leveling device |
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| CN201520748050.8U CN204938843U (en) | 2015-09-25 | 2015-09-25 | A kind of shearing type lifter hydraulic ram automatic leveling device |
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| CN204938843U true CN204938843U (en) | 2016-01-06 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762894A (en) * | 2016-12-27 | 2017-05-31 | 内蒙古北方重工业集团有限公司 | The method of hydraulic double cylinder Synchronization Control self-tipping type semitrailer carriage lifting |
| CN106957027A (en) * | 2017-04-26 | 2017-07-18 | 中意泰达(营口)汽车保修设备有限公司 | The full-automatic leveling system of lifting machine |
| CN107200288A (en) * | 2017-07-23 | 2017-09-26 | 苏州艾沃意特机械设备制造有限公司 | A kind of automatic leveling shearing type lifter |
| CN107399690A (en) * | 2017-09-12 | 2017-11-28 | 常熟通润汽车零部件股份有限公司 | Shearing type lifter |
| CN108100920A (en) * | 2018-02-08 | 2018-06-01 | 上海航空机械有限公司 | A kind of synchronization lifting jack and jack hydraulic system |
| CN108317115A (en) * | 2018-04-09 | 2018-07-24 | 中山市颉榕汽车维修检测设备有限公司 | Shearing type lifter levelling device, hoisting system and shearing type lifter |
| CN109030226A (en) * | 2018-07-06 | 2018-12-18 | 郑州四维机电装备制造有限公司 | Hydraulic bracket test-bed and its pedestal |
| CN109458376A (en) * | 2018-12-11 | 2019-03-12 | 山东弘发兴凯实业股份有限公司 | A kind of hydraulic abdomen elevating ram |
| CN112412906A (en) * | 2020-12-04 | 2021-02-26 | 广州赫力汽车维修设备有限公司 | Hydraulic control system for lifting machine |
| CN112727821A (en) * | 2021-01-05 | 2021-04-30 | 中冶南方连铸技术工程有限责任公司 | Single-rod electro-hydraulic direct-drive servo cylinder device |
| CN113685660A (en) * | 2021-08-25 | 2021-11-23 | 吴娜 | Hydraulic high-precision automatic leveling device with self-locking function |
| CN113833710A (en) * | 2020-06-23 | 2021-12-24 | 明基三丰医疗器材（上海）有限公司 | Oil hydraulic cylinder and series connection type synchronous oil hydraulic cylinder system |
| CN114684742A (en) * | 2021-09-13 | 2022-07-01 | 路特利举升机(海门)有限公司 | Quick oil supplementing device |
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2015
- 2015-09-25 CN CN201520748050.8U patent/CN204938843U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762894B (en) * | 2016-12-27 | 2019-05-24 | 内蒙古北方重工业集团有限公司 | The method of hydraulic double cylinder synchronously control self-tipping type semitrailer carriage lifting |
| CN106762894A (en) * | 2016-12-27 | 2017-05-31 | 内蒙古北方重工业集团有限公司 | The method of hydraulic double cylinder Synchronization Control self-tipping type semitrailer carriage lifting |
| CN106957027A (en) * | 2017-04-26 | 2017-07-18 | 中意泰达(营口)汽车保修设备有限公司 | The full-automatic leveling system of lifting machine |
| CN107200288A (en) * | 2017-07-23 | 2017-09-26 | 苏州艾沃意特机械设备制造有限公司 | A kind of automatic leveling shearing type lifter |
| CN107399690A (en) * | 2017-09-12 | 2017-11-28 | 常熟通润汽车零部件股份有限公司 | Shearing type lifter |
| CN108100920A (en) * | 2018-02-08 | 2018-06-01 | 上海航空机械有限公司 | A kind of synchronization lifting jack and jack hydraulic system |
| CN108100920B (en) * | 2018-02-08 | 2024-05-10 | 上海航空机械有限公司 | Synchronous lifting jack and jack hydraulic system |
| CN108317115A (en) * | 2018-04-09 | 2018-07-24 | 中山市颉榕汽车维修检测设备有限公司 | Shearing type lifter levelling device, hoisting system and shearing type lifter |
| CN108317115B (en) * | 2018-04-09 | 2023-08-04 | 中山市颉榕汽车维修检测设备有限公司 | Scissor type lifter leveling device, lifting system and scissor type lifter |
| CN109030226A (en) * | 2018-07-06 | 2018-12-18 | 郑州四维机电装备制造有限公司 | Hydraulic bracket test-bed and its pedestal |
| CN109458376A (en) * | 2018-12-11 | 2019-03-12 | 山东弘发兴凯实业股份有限公司 | A kind of hydraulic abdomen elevating ram |
| CN113833710A (en) * | 2020-06-23 | 2021-12-24 | 明基三丰医疗器材（上海）有限公司 | Oil hydraulic cylinder and series connection type synchronous oil hydraulic cylinder system |
| CN112412906A (en) * | 2020-12-04 | 2021-02-26 | 广州赫力汽车维修设备有限公司 | Hydraulic control system for lifting machine |
| CN112727821A (en) * | 2021-01-05 | 2021-04-30 | 中冶南方连铸技术工程有限责任公司 | Single-rod electro-hydraulic direct-drive servo cylinder device |
| CN112727821B (en) * | 2021-01-05 | 2023-10-27 | 中冶南方连铸技术工程有限责任公司 | Single-rod electrohydraulic direct-drive servo cylinder device |
| CN113685660A (en) * | 2021-08-25 | 2021-11-23 | 吴娜 | Hydraulic high-precision automatic leveling device with self-locking function |
| CN114684742A (en) * | 2021-09-13 | 2022-07-01 | 路特利举升机(海门)有限公司 | Quick oil supplementing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Sen Inventor after: Ma Hui Inventor before: Zhang Sen |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180629 Address after: 712299, Wugong County, Xianyang City, Shaanxi Province, No. 447, Shao Zhai village. Co-patentee after: Ma Hui Patentee after: Zhang Sen Address before: 712299, Wugong County, Xianyang City, Shaanxi Province, No. 447, Shao Zhai village. Patentee before: Zhang Sen |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20180925 |