CN113374761B - Hydraulic control system and control circuit of vehicle lifter and lifter - Google Patents
Hydraulic control system and control circuit of vehicle lifter and lifter Download PDFInfo
- Publication number
- CN113374761B CN113374761B CN202110680371.9A CN202110680371A CN113374761B CN 113374761 B CN113374761 B CN 113374761B CN 202110680371 A CN202110680371 A CN 202110680371A CN 113374761 B CN113374761 B CN 113374761B
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- hydraulic
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- pressure compensation
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 66
- 239000003921 oil Substances 0.000 claims abstract description 62
- 230000009466 transformation Effects 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
- F15B11/0426—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling the number of pumps or parallel valves switched on
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The technical scheme provided by the invention is as follows: the hydraulic control system comprises an oil tank, an oil suction filter screen, a hydraulic pump, a motor, a first hydraulic oil way and a second hydraulic oil way, wherein the hydraulic pump pumps oil from the oil tank through the oil suction filter screen, the motor drives the hydraulic pump, the first hydraulic oil way comprises a first pressure compensation valve and a first two-position two-normally-closed electromagnetic valve, the second hydraulic oil way comprises a second pressure compensation valve and a second two-position two-normally-closed electromagnetic valve, the oil drainage amount of the first pressure compensation valve is larger than the oil drainage amount of the second pressure compensation valve, and the quick, medium and slow speed three-speed selection is realized through the work switching of the first hydraulic oil way and the second hydraulic oil way.
Description
Technical Field
The invention relates to the technical field of vehicle lifting control, in particular to a hydraulic control system and a control circuit of a vehicle lifting machine and the lifting machine.
Background
With the development of the vehicle industry, vehicle lifters are mainly used for repairing or assembling vehicles. The number of vehicle lifters is continuously increasing, but the lifting speed of the lifters is generally constant, so that when lifters with different lifting speeds are used, a plurality of lifters with different lifting speeds are needed, and the purchasing cost is high. The existing lifting machine has no lifting speed variable speed design, and the adaptability of the lifting machine is low.
In view of this, there is a need for an improvement in the lifting speed of the prior art lifts to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the technical problems, the invention aims to disclose a hydraulic control system, a control circuit and a lifter of a vehicle lifter, so as to realize the speed regulation function of the lifter with high speed, medium speed and slow speed, increase the flexibility and adaptability of the lifter, and solve the defect that the lifting speed of the lifter cannot be regulated in the prior art.
To achieve the first object, the present invention provides a hydraulic control system for a vehicle lifting machine, including: the hydraulic pump pumps oil from the oil tank through the oil absorption filter screen, the motor drives the hydraulic pump, the first hydraulic oil circuit comprises a first pressure compensation valve and a first two-position two-normally-closed electromagnetic valve, the second hydraulic oil circuit comprises a second pressure compensation valve and a second two-position two-normally-closed electromagnetic valve, and the oil leakage amount of the first pressure compensation valve is larger than that of the second pressure compensation valve.
As a further improvement of the invention, the hydraulic pump is provided with a one-way valve.
As a further improvement of the invention, the invention also comprises an overflow valve, wherein the first two-position two-way normally-closed electromagnetic valve and the second two-position two-way normally-closed electromagnetic valve are both provided with an emergency valve
As a further improvement of the invention, the invention also comprises an oil cylinder and a throttle valve
As a further improvement of the invention, the control system further comprises a pressure sensor arranged at the oil outlet.
Based on the same inventive concept and in order to achieve the second object, the invention provides a hydraulic control circuit of a vehicle lifting machine, which comprises a power supply circuit, a transformation circuit and a hydraulic oil circuit switching circuit, wherein the power supply circuit comprises a contactor KM and a contactor switch KA4, the contactor KM and the contactor switch KA4 are connected in series, the hydraulic oil circuit switching circuit comprises a first switching circuit and a second switching circuit, the first switching circuit comprises switches KA1-1 and KA1-2 connected in series and a first hydraulic oil circuit created by the first invention, the second switching circuit comprises switches KA2-1 and KA2-2 connected in series and a second hydraulic oil circuit created by the first invention, and the transformation circuit is connected with the power supply circuit and the hydraulic oil circuit switching circuit.
As a further improvement of the invention, the first switch circuit is also connected with an indicator lamp in parallel.
As a further improvement of the invention, when the first switch circuit and the second switch circuit are electrified, the first hydraulic oil way and the second hydraulic oil way are both opened, the oil output of the hydraulic system is maximum, and the lifting speed is high.
As a further improvement of the invention, when the first switch circuit is electrified and the second switch circuit is powered off, the first pressure compensation valve is started, and the lifting speed is low because the oil drainage amount of the first pressure compensation valve of the first hydraulic oil way is larger, the oil outlet amount of the hydraulic system is minimum; when the second switch circuit is electrified and the first switch circuit is powered off, the second pressure compensation valve is started, and the oil discharge amount of the hydraulic system is small and the lifting speed is medium speed because the oil discharge amount of the second pressure compensation valve of the second hydraulic oil way is small.
Based on the same thought, and in order to achieve the third object, the invention provides a vehicle lifting machine, which comprises a vehicle lifting machine hydraulic control system and a vehicle lifting machine hydraulic control circuit.
Compared with the prior art, the invention has the following technical effects:
the vehicle lifting machine is provided with a first hydraulic oil way and a second hydraulic oil way, when the first hydraulic oil way and the second hydraulic oil way work simultaneously, the oil output of a hydraulic system is maximum, and the lifting machine is rapid; because the oil drainage quantity of the first pressure compensation valve is larger than that of the second pressure compensation valve, when only the first hydraulic oil way works, the oil drainage quantity of the hydraulic system is minimum, and the lifter is slow; when only the second hydraulic oil way works, the oil output of the hydraulic system is maximum, the lifter is at a medium speed, and three speeds of quick speed, medium speed and slow speed are selected by switching the work of the first hydraulic oil way and the second hydraulic oil way.
In addition, in order to meet the requirement of a user on lifting speed when the lifting machine leaves a factory, the lifting speed of the lifting machine can be fixed, and only the quick speed, the medium speed and the slow speed are selected, so that one set of hydraulic system can meet the requirements of the user on three lifting speeds, the development cost of the hydraulic systems of the lifting machine with different lifting speeds is greatly reduced from the perspective of the cost of the hydraulic system, the universality of the hydraulic system is improved, the production efficiency of the lifting machine is improved, and when the lifting speed is required to be adjusted by the user, the lifting machine can be realized by only changing the setting of an oil way.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a hydraulic control system for a vehicle lift of the present invention.
Fig. 2 is a schematic diagram of a hydraulic control circuit of a vehicle lift of the present invention.
1, an oil tank; 2. an oil absorption filter screen; 3. a motor; 4. a hydraulic pump; 5. an overflow valve; 6. a first pressure compensating valve; 7. a second pressure compensating valve; 8. the first two-position two-way normally closes the solenoid valve; 9. the second two-position two-way normally closes the solenoid valve; 10. a pressure sensor; 11. an oil cylinder; 12. a throttle valve; 13. a one-way valve; 14. an emergency valve; 15. a power supply circuit; 16. a voltage transformation circuit; 17. a hydraulic oil circuit switching circuit; YA, a first hydraulic oil way; YA1, a second hydraulic oil way.
Detailed Description
The present invention will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present invention, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present invention by those skilled in the art.
Example 1
Referring to fig. 1, this embodiment discloses a specific implementation of a hydraulic control system (hereinafter referred to as "system") of a vehicle lifter.
The hydraulic control system of the vehicle lifting machine comprises an oil tank 1, an oil absorption filter screen 2, a hydraulic pump 4, a motor 3, a first hydraulic oil way and a second hydraulic oil way, wherein the hydraulic pump 4 pumps oil from the oil tank 1 through the oil absorption filter screen 2, the motor 3 drives the hydraulic pump 4, the first hydraulic oil way comprises a first pressure compensation valve 6 and a first two-position normally-closed electromagnetic valve 8, the second hydraulic oil way comprises a second pressure compensation valve 7 and a second two-position normally-closed electromagnetic valve 9, and the oil leakage amount of the first pressure compensation valve 6 is larger than that of the second pressure compensation valve 7.
It should be further noted that, as shown in fig. 1, the vehicle lifting machine is provided with a first hydraulic oil way and a second hydraulic oil way, when the first hydraulic oil way and the second hydraulic oil way work simultaneously, the first pressure compensation valve 6 and the second pressure compensation valve 7 are not in a working state, no oil leakage exists, the oil output of the hydraulic system is the largest, and the lifting machine is rapid; because the oil drainage amount of the first pressure compensation valve 6 is larger than that of the second pressure compensation valve 7, when only the first hydraulic oil way works, the first pressure compensation valve 6 is in a working state, the oil drainage amount is larger, the oil drainage amount of a hydraulic system is minimum, and the lifter is slow; when only the second hydraulic oil way works, the second pressure compensation valve 7 is in a working state, the oil leakage amount is smaller, the oil output amount of the hydraulic system is maximum, the lifter is at a medium speed, and three speeds of quick speed, medium speed and slow speed are selected by switching the work of the first hydraulic oil way and the second hydraulic oil way.
As a preferred embodiment, the hydraulic system further comprises a relief valve 5, a pressure sensor 10, an oil cylinder 11, a throttle valve 12, a check valve 13 and an emergency valve 14; when the lifting machine is overloaded, the system is provided with the overflow valve 5, so that the safety of the system can be protected; the hydraulic pump 4 is also provided with a one-way valve 13, so that the backflow of hydraulic oil is prevented and the gear pump is protected in the lifting process of the lifting machine, and the safety of the hydraulic pump 4 in the system is improved; the pressure sensor 10 is arranged at an oil outlet of the system and can send out an alarm or stop under the overload condition of the lifter; the first two-position two-way normally-closed electromagnetic valve 8 and the second two-position two-way normally-closed electromagnetic valve 9 are respectively provided with the emergency valve 14, so that the emergency valve 14 can be opened to perform oil drainage operation under emergency conditions, and the safety of the system can be improved.
In order to meet the requirements of a user on lifting speeds when the lifting machine leaves a factory, the lifting speeds of the lifting machine can be fixed, and only the quick speed, the medium speed and the slow speed are selected, so that one set of hydraulic system can meet the requirements of the user on three lifting speeds, development cost of the hydraulic systems of the lifting machine with different lifting speeds is greatly reduced from the perspective of cost of the hydraulic system, the universality of the hydraulic system is improved, the production efficiency of the lifting machine is improved, and when the lifting speeds are required to be adjusted by the user, the lifting speed can be realized by only changing the setting of an oil way.
Example 2
Referring to fig. 2, this embodiment discloses a specific implementation of a hydraulic control circuit (hereinafter referred to as "circuit") of a vehicle lifting machine.
Referring to fig. 2, the hydraulic control circuit of the vehicle lifting machine comprises a power supply circuit 15, a transformation circuit 16 and a hydraulic oil circuit switch circuit 17, wherein the power supply circuit 15 comprises a contactor KM and a contactor switch KA4, the contactor KM and the contactor switch KA4 are connected in series, the hydraulic oil circuit switch circuit 17 comprises a first switch circuit and a second switch circuit, the first switch circuit comprises switches KA1-1 and KA1-2 connected in series and the first hydraulic oil circuit according to any one of the embodiment 1, the second switch circuit comprises switches KA2-1 and KA2-2 connected in series and the second hydraulic oil circuit according to any one of the embodiment 1, and the transformation circuit 16 is connected with the power supply circuit 15 and the hydraulic oil circuit switch circuit 17.
It should be further noted that, the circuit in embodiment 2 is a control circuit principle description of the system in embodiment 1, the power supply circuit 15 provides a power source for a motor of the hydraulic system, and after the motor is transformed by the transforming circuit 16, the power supply circuit controls the hydraulic oil circuit switching circuit 17, specifically, controls the first switching circuit and the second switching circuit, where the first switching circuit controls the first hydraulic oil circuit, and the second switching control circuit controls the second hydraulic oil circuit; when the first switch circuit and the second switch circuit are electrified, the first hydraulic oil way and the second hydraulic oil way are both opened, the first pressure compensation valve 6 and the second pressure compensation valve 7 are both not drained, the oil output of the hydraulic system is maximum, and the lifting speed is high; when the first switch circuit is electrified and the second switch circuit is powered off, the oil drainage amount of the first pressure compensation valve 6 of the first hydraulic oil circuit is large, the oil drainage amount of the hydraulic system is minimum, and the lifting speed is low; when the second switch circuit is electrified and the first switch circuit is powered off, the oil leakage amount of the second pressure compensation valve 7 of the second hydraulic oil circuit is smaller, the oil leakage amount of the hydraulic system is smaller, and the lifting speed is medium; in order to remind the lifting machine to be in a working state, the first switch circuit is also connected with an indicator lamp in parallel.
The control circuit of this embodiment is an electrical principle of the control system of embodiment 1, and embodiment 2 will not be described in detail with respect to the control system portion.
Example 3
This example discloses a specific implementation of a vehicle lift, including a vehicle lift hydraulic control system as described in example 1 and a vehicle lift hydraulic control circuit as described in example 2.
Through the above embodiment, the technical effects are as follows:
the lifting machine has three speeds of fast speed, medium speed and slow speed, not only can be provided with the same lifting machine, but also can keep one speed or two speeds according to the selection of users, so that one hydraulic system can meet the user requirements of three lifting speeds, from the cost perspective of the hydraulic system, the development cost of the hydraulic system of the lifter with different lifting speeds is greatly reduced, the universality of the hydraulic system is improved, the production efficiency of the lifter is accelerated, and when a user needs to adjust the lifting speed, the hydraulic system can be realized by only changing the setting of an oil way.
Claims (6)
1. The vehicle lifting machine is characterized by comprising a vehicle lifting machine hydraulic control system and a vehicle lifting machine hydraulic control circuit;
the hydraulic control system of the vehicle lifting machine comprises an oil tank, an oil absorption filter screen, a hydraulic pump, a motor, a first hydraulic oil way and a second hydraulic oil way, wherein the hydraulic pump pumps oil from the oil tank through the oil absorption filter screen, the motor drives the hydraulic pump, the first hydraulic oil way comprises a first pressure compensation valve and a first two-position two-normally-closed electromagnetic valve, the second hydraulic oil way comprises a second pressure compensation valve and a second two-position two-normally-closed electromagnetic valve, and the oil drainage amount of the first pressure compensation valve is larger than that of the second pressure compensation valve;
the hydraulic control circuit of the vehicle lifting machine comprises a power supply circuit, a transformation circuit and a hydraulic oil circuit switching circuit, wherein the power supply circuit comprises a contactor KM and a contactor switch KA4, the contactor KM and the contactor switch KA4 are connected in series, the hydraulic oil circuit switching circuit comprises a first switching circuit and a second switching circuit, the first switching circuit comprises switches KA1-1 and KA1-2 connected in series and a first hydraulic oil circuit, the second switching circuit comprises switches KA2-1 and KA2-2 connected in series and a second hydraulic oil circuit, and the transformation circuit is connected with the power supply circuit and the hydraulic oil circuit switching circuit;
when the first switch circuit is electrified and the second switch circuit is powered off, only the first pressure compensation valve is started, and the lifting speed is low because the oil drainage amount of the first pressure compensation valve of the first hydraulic oil way is large, the oil outlet amount of the hydraulic system is minimum;
when the second switch circuit is electrified and the first switch circuit is powered off, only the second pressure compensation valve is started, and the oil discharge amount of the hydraulic system is small as the oil discharge amount of the second pressure compensation valve of the second hydraulic oil way is small, and the lifting speed is medium;
when the first switch circuit and the second switch circuit are electrified, the first hydraulic oil way and the second hydraulic oil way are both opened, the first pressure compensation valve and the second pressure compensation valve are not in a working state, no oil leakage exists, the oil output of a hydraulic system is maximum, and the lifting speed is high.
2. The vehicle lift of claim 1 wherein the hydraulic pump is provided with a one-way valve.
3. The vehicle lift of claim 1, wherein the vehicle lift hydraulic control system further comprises a relief valve, the first two normally closed solenoid valve and the second two normally closed solenoid valve each providing an emergency valve.
4. The vehicle lift of claim 1, wherein the vehicle lift hydraulic control system further comprises a spill valve further comprising a ram and a throttle.
5. The vehicle lift of any of claims 1-4, wherein the vehicle lift hydraulic control system further comprises a pressure sensor disposed at the oil outlet.
6. The vehicle lift of claim 5, wherein the first switching circuit is further coupled in parallel with an indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110680371.9A CN113374761B (en) | 2021-06-18 | 2021-06-18 | Hydraulic control system and control circuit of vehicle lifter and lifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110680371.9A CN113374761B (en) | 2021-06-18 | 2021-06-18 | Hydraulic control system and control circuit of vehicle lifter and lifter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113374761A CN113374761A (en) | 2021-09-10 |
| CN113374761B true CN113374761B (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110680371.9A Active CN113374761B (en) | 2021-06-18 | 2021-06-18 | Hydraulic control system and control circuit of vehicle lifter and lifter |
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| Country | Link |
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| CN (1) | CN113374761B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011057436A (en) * | 2009-09-14 | 2011-03-24 | Sugiyasu Corp | Lift hydraulic circuit for vehicle maintenance |
| CN103693584A (en) * | 2013-12-23 | 2014-04-02 | 常熟通润汽车零部件股份有限公司 | Double shear lifter capable of compensating for height difference |
| CN204082724U (en) * | 2014-09-11 | 2015-01-07 | 宁波力达物流设备有限公司 | The hydraulic system of forklift |
| CN204386982U (en) * | 2014-12-31 | 2015-06-10 | 淮安威博液压有限公司 | A kind of lifting machine double pump hydraulic unloading power unit |
| CN207033867U (en) * | 2017-08-02 | 2018-02-23 | 奥莱特汽车科技有限公司 | A kind of double live hydraulic systems of Superthin scissor lift |
| CN207212799U (en) * | 2017-09-13 | 2018-04-10 | 广州高昌机电股份有限公司 | A kind of soft oil route controller of shearing type lifter |
| 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 |
| CN207701491U (en) * | 2017-12-18 | 2018-08-07 | 无锡市德力流体科技有限公司 | Double speed down type hydraulic power unit |
| CN207795714U (en) * | 2017-12-29 | 2018-08-31 | 江苏威博液压股份有限公司 | A kind of lifting machine double pump power unit |
| CN110734000A (en) * | 2018-07-18 | 2020-01-31 | 中山市颉榕汽车维修检测设备有限公司 | PLC (programmable logic controller) controlled automatic leveling system for vehicle scissor lift |
-
2021
- 2021-06-18 CN CN202110680371.9A patent/CN113374761B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011057436A (en) * | 2009-09-14 | 2011-03-24 | Sugiyasu Corp | Lift hydraulic circuit for vehicle maintenance |
| CN103693584A (en) * | 2013-12-23 | 2014-04-02 | 常熟通润汽车零部件股份有限公司 | Double shear lifter capable of compensating for height difference |
| CN204082724U (en) * | 2014-09-11 | 2015-01-07 | 宁波力达物流设备有限公司 | The hydraulic system of forklift |
| CN204386982U (en) * | 2014-12-31 | 2015-06-10 | 淮安威博液压有限公司 | A kind of lifting machine double pump hydraulic unloading power unit |
| CN207033867U (en) * | 2017-08-02 | 2018-02-23 | 奥莱特汽车科技有限公司 | A kind of double live hydraulic systems of Superthin scissor lift |
| CN207212799U (en) * | 2017-09-13 | 2018-04-10 | 广州高昌机电股份有限公司 | A kind of soft oil route controller of shearing type lifter |
| CN207701491U (en) * | 2017-12-18 | 2018-08-07 | 无锡市德力流体科技有限公司 | Double speed down type hydraulic power unit |
| CN207795714U (en) * | 2017-12-29 | 2018-08-31 | 江苏威博液压股份有限公司 | A kind of lifting machine double pump power unit |
| 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 |
| CN110734000A (en) * | 2018-07-18 | 2020-01-31 | 中山市颉榕汽车维修检测设备有限公司 | PLC (programmable logic controller) controlled automatic leveling system for vehicle scissor lift |
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| CN113374761A (en) | 2021-09-10 |
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